JP2022153870A - Label for cleaning, and method for manufacturing label for cleaning - Google Patents

Abstract

[Problem] To provide a cleaning label that can be heat-sensitively adhered to an adherend such as clothing after pressure-sensitive adhesion to the adherend, and has excellent dry-cleaning resistance. [Solution] A cleaning label 1 comprising a substrate 10, a heat-sensitive adhesive layer 20 laminated on one side of the substrate 10, and a pressure-sensitive adhesive layer 30 laminated on the side of the heat-sensitive adhesive layer 20 opposite to the side on which the substrate 10 is laminated, the pressure-sensitive adhesive layer 30 containing a polymer component (A), and the proportion of a tackifier resin relative to 100 parts by mass of the polymer component (A) in the pressure-sensitive adhesive layer 30 being less than 10 parts by mass. [Selected Figure] Figure 1

Description

The present invention relates to a cleaning label and a method for manufacturing a cleaning label.

Various tags are used to display information on clothing and the like.
In dry cleaning shops, cleaning tags are attached to collected clothing for the purpose of identifying and sorting the collected clothing.
In addition, clothing, etc. is attached with quality labeling tags that include information such as washing labels, washing symbols, sizes, handling precautions including washing or dry cleaning methods, material types, and fiber composition. .
The above cleaning tags are attached using metal pins or staples. Moreover, the above-mentioned quality labeling tag is normally sewn directly onto clothing or the like.

On the other hand, as a cleaning tag that can be adhered to clothes, etc., Patent Document 1 discloses that the hot-melt adhesive layer is present over the entire area with respect to the area of the label. , a label in which the pressure-sensitive adhesive layer is partially present on the surface of the hot-melt adhesive layer at a position other than the end portion of the label.

In Patent Document 2, a printed layer, a thermal adhesive layer made of a hot melt adhesive provided on the back surface of the printed layer, and a temporary adhesive layer made of a detachable adhesive provided on the back surface of the thermal adhesive layer. In the tag for attaching to cloth, wherein the temporary adhesive layer is temporarily attached to the release sheet, the tag for attaching to cloth is disclosed in which the temporary adhesive layer is provided on a part of the back surface of the thermal adhesive layer. ing.

JP 2016-71313 A JP-A-2002-72892

In the above-mentioned cleaning tags, an adhesive layer (adhesive layer of Patent Document 1, temporary adhesive layer of Patent Document 2) that can be pressure-sensitively adhered to an adherend such as clothing to temporarily attach the cleaning tag. is provided, and the heat-sensitive adhesive layer (the hot-melt adhesive layer of Patent Document 1, the heat-sensitive adhesive layer of Patent Document 2) tends to hinder the heat-sensitive adhesion. Therefore, in Patent Documents 1 and 2, a pressure-sensitive adhesive layer is partially provided on the heat-sensitive adhesive layer in order to strengthen the heat-sensitive adhesive force and improve the cleaning resistance.
However, there is still room for improvement in improving cleaning resistance.

The present invention has been made in order to solve the above-described problems. To provide a label for cleaning which can be heat-sensitively adhered to an adherend, is resistant to peeling even after dry cleaning, and has excellent dry cleaning resistance.

Conventionally, a pressure-sensitive adhesive layer that temporarily affixes a label to a rough surface such as clothing generally contains a tackifier resin to increase the adhesive strength. However, the present inventors have surprisingly found that by reducing the content of the tackifying resin in the pressure-sensitive adhesive layer, it is possible to improve the cleaning resistance exhibited by the heat-sensitive adhesion of the heat-sensitive adhesive layer. It was discovered that it is, and came to complete this invention.
That is, the present invention has the following aspects.

(1) a substrate;
a heat-sensitive adhesive layer laminated on one side of the substrate;
a pressure-sensitive adhesive layer laminated on the surface of the heat-sensitive adhesive layer opposite to the side on which the base material is laminated;
with
The pressure-sensitive adhesive layer contains a polymer component (A),
A label for cleaning, wherein the content of the tackifying resin is less than 10 parts by mass with respect to 100 parts by mass of the polymer component (A) in the pressure-sensitive adhesive layer.
(2) The above ( 1) The cleaning label described in 1).
(3) The cleaning label according to (1) or (2) above, wherein the polymer component (A) has a glass transition temperature (Tg) of −40° C. or lower.
(4) The cleaning label according to any one of (1) to (3) above, wherein the polymer component (A) contains an acrylic polymer.
(5) The cleaning label according to (4) above, wherein the content of structural units derived from 2-ethylhexyl acrylate is 50% by mass or more based on 100% by mass of the polymer component (A).
(6) The cleaning label according to any one of (1) to (5) above, wherein the pressure-sensitive adhesive layer has a thickness of 15 μm or less.
(7) The cleaning label according to any one of (1) to (6) above, wherein the heat-sensitive adhesive layer has a melting point of 130° C. or less.
(8) the heat-sensitive adhesive layer contains a polymer component (B),
(1) to (7) above, wherein the polymer component (A) contained in the adhesive layer and the polymer component (B) contained in the heat-sensitive adhesive layer are crosslinked via a crosslinking agent. A cleaning label according to any one of
(9) Any one of (1) to (8) above, wherein the substrate is at least one selected from the group consisting of a foamed resin film, a microporous synthetic paper, and a microporous resin film. or one cleaning label.
(10) providing a heat-sensitive adhesive layer on one side of the substrate;
Providing a pressure-sensitive adhesive layer on the surface of the heat-sensitive adhesive layer opposite to the side on which the base material is laminated,
The pressure-sensitive adhesive layer contains a polymer component (A),
The cleaning label according to any one of (1) to (9), wherein the content of the tackifying resin is 10 parts by mass or less with respect to 100 parts by mass of the polymer component of the adhesive layer. Production method.

According to the present invention, it has adhesion aptitude for pressure-sensitive adhesion to an adherend such as clothing for temporary fixing, can be heat-sensitively adhered to the adherend after temporary fixing, and has excellent dry-cleaning resistance. We can provide labels for

1 is a cross-sectional view of a cleaning label according to one embodiment of the present invention; FIG.

Hereinafter, embodiments of the cleaning label and the method for manufacturing the cleaning label of the present invention will be described.

≪Cleaning label≫
A cleaning label (hereinafter sometimes simply referred to as a "label") of an embodiment includes a base material, a heat-sensitive adhesive layer laminated on one side of the base material, and the and a pressure-sensitive adhesive layer laminated on the surface opposite to the base material,
The pressure-sensitive adhesive layer contains the polymer component (A), and the content of the tackifying resin is 10 parts by mass or less with respect to 100 parts by mass of the polymer component (A) in the pressure-sensitive adhesive layer. .

FIG. 1 is a cross-sectional view of a cleaning label 1 according to an embodiment. As shown in FIG. 1, the label 1 according to the present embodiment includes a substrate 10, a heat-sensitive adhesive layer 20 laminated on one surface of the substrate 10, and the heat-sensitive adhesive layer 20. and a pressure-sensitive adhesive layer 30 laminated on the surface opposite to the laminated side. Note that the release liner 40 is peeled off when the label is used, and is not an essential component of the label of the present invention.

<Base material>
Examples of the substrate 10 of the label 1 according to the embodiment include films, cloths, non-woven fabrics, and the like.
Examples of films include resin films, and synthetic resin films are preferred. Examples of resin films include polyester films such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate; polyolefin films such as polyethylene and polypropylene; polyamide films such as nylon; polyurethane films; .

The substrate may be a film having microvoids. The film having microvoids is preferably at least one selected from the group consisting of a foamed resin film, a synthetic paper having microvoids, and a resin film having microvoids. By having microvoids, the film becomes white, and the visibility of washing indications and the like is enhanced.

The foamed resin film is a porous resin film, and examples thereof include those obtained by extruding and foaming a resin, and those obtained by molding a resin composition in which gas is dispersed. Examples of foamed resin films include foamed polyester films, foamed polyethylene terephthalate films, foamed polypropylene films, foamed polyethylene films, and foamed polystyrene films.

A resin film having micropores is a porous resin film, and is produced using a synthetic resin as a main raw material. As the resin in the resin film having microvoids, the same resins as those for the foamed resin film can be exemplified.

Synthetic paper having microvoids is a film that is porous and has properties similar to those of paper manufactured using synthetic resin as the main raw material. Synthetic resins that are the main raw material of synthetic paper include polypropylene, polyester, polystyrene, and the like, and polyethylene terephthalate can be exemplified as polyester. Here, the main raw material refers to a raw material that accounts for 50% by mass or more of the total raw material of the synthetic paper. Micropores of synthetic paper include, for example, micropores generated in the stretching process. For example, when a filler-containing synthetic resin is stretched, fine cavities are formed around the filler, giving it a white paper-like texture. Specific examples of synthetic paper having microvoids include Yupo (registered trademark) (containing polypropylene, Yupo Corporation), Crisper (registered trademark) (containing polyester, Toyobo Co., Ltd.), and N-coat (registered trademark) (containing polypropylene). , Nakamoto Pax Co., Ltd.), etc., and those having properties equivalent to these are included in the synthetic paper having microvoids.
The base material may be transparent or opaque, but is preferably opaque because information printed on the label can be easily identified.
A film having microvoids is also suitable as a substrate for labels because it is opaque.

Cloths and non-woven fabrics include those containing cellulose fibers such as hemp, wool, cotton, pulp and rayon, and fibers such as nylon, polyester, polyurethane and vinylon.

The type of weave of the cloth is not particularly limited, and examples thereof include satin such as polyester satin, and taffeta such as polyester taffeta and cotton taffeta.

The substrate 10 may consist of a single layer or may consist of multiple layers. In the case of multiple layers, each layer may be the same or different.

The thickness of the substrate 10 can be appropriately set, and is preferably 15 to 300 μm, more preferably 30 to 200 μm, and even more preferably 40 to 100 μm. When the thickness of the substrate is within the above range, good dry cleaning resistance can be obtained.

As used herein, the term “thickness” can be obtained by using a constant pressure thickness gauge in accordance with JIS K7130 as a value represented by the average of thicknesses measured at five randomly selected locations.

Here, the thickness of the substrate means the thickness of the entire substrate, for example, when the substrate consists of multiple layers, the thickness means the total thickness of all layers constituting the substrate. do.

<Adhesive layer>
The pressure-sensitive adhesive layer 30 in the label 1 according to the embodiment has pressure-sensitive adhesive properties, and is a layer that allows the label to be attached to clothing or the like by pressure-sensitively adhering it to clothing or the like as an adherend. “Pressure-sensitive adhesiveness” refers to the property of being able to adhere to an adherend by applying pressure to the pressure-sensitive adhesive layer. Pressure-sensitive adhesion and adhesion are used in the same sense.
By providing the label with the pressure-sensitive adhesive layer, the label is provided with affixing aptitude for temporarily attaching the label to clothing or the like prior to subsequent heat-sensitive adhesion using a press or the like using the heat-sensitive adhesive layer. By enabling the temporary fixing, it becomes easy to adhere the label to the object to which the label is to be thermally adhered accurately at the intended position.

The composition of the pressure-sensitive adhesive layer is not particularly limited, and can be composed of known pressure-sensitive adhesives. The pressure-sensitive adhesive layer in the label according to the embodiment contains the polymer component (A), and the content of the tackifying resin is 10 parts by mass or less with respect to 100 parts by mass of the polymer component (A) in the pressure-sensitive adhesive layer. be. A polymer component is a component that can be regarded as being formed by a polymerization reaction of a polymerizable compound.
The content ratio of the polymer component (A) to the total weight of the pressure-sensitive adhesive layer may be 50 to 100% by mass, 60 to 100% by mass, or 70 to 100% by mass.
The tackifier resin and polymer components are described below.

- Tackifying resin In the present specification, the "tackifying resin" is added to the pressure-sensitive adhesive layer and has the function of improving the adhesive performance of the pressure-sensitive adhesive layer. Tackifying resins are also called tackifiers.

The tackifying resin may be a polymer. The weight average molecular weight of the tackifying resin may be, for example, 5000 or less, 100-5000, 200-3000, or 300-1000. A polystyrene conversion value measured by a gel permeation chromatography (GPC) method can be adopted as the weight average molecular weight.

In the pressure-sensitive adhesive layer according to the embodiment, the content ratio of the tackifying resin to 100 parts by mass of the polymer component (A) is less than 10 parts by mass, preferably 4 parts by mass or less, and 3 parts by mass. It is more preferably 1 part by mass or less, more preferably 1 part by mass or less, and particularly preferably the pressure-sensitive adhesive layer does not substantially contain a tackifying resin.
From the same point of view, the pressure-sensitive adhesive layer according to the embodiment may have a content ratio of the tackifying resin of less than 9% by mass or 4% by mass or less with respect to the total mass of the pressure-sensitive adhesive layer. , 3% by mass or less, or 1% by mass or less, and it is particularly preferable that the pressure-sensitive adhesive layer contains substantially no tackifying resin.
The cleaning resistance of the label can be improved by setting the content of the tackifying resin to the above upper limit or less.

Conventionally, a tackifying resin is generally added to the pressure-sensitive adhesive layer in order to pressure-sensitively adhere a label to a rough surface such as clothing.
However, the inventors have clarified that the content of the tackifying resin exceeding the upper limit of the pressure-sensitive adhesive layer is a factor in lowering the resistance to dry cleaning. By setting the content of the tackifier resin to 100 parts by mass of the polymer component (A) in the pressure-sensitive adhesive layer to be less than or less than the above upper limit, a label having excellent dry cleaning resistance can be provided.

Here, "dry-cleaning resistance" means that the label after pressure-sensitive adhesion to the adherend and heat-sensitive adhesion is subjected to dry-cleaning (for example, a dry-cleaning test using perchlorethylene described later). It means the property that peeling from the adherend due to does not occur or hardly occurs.

Considering that the dry-cleaning resistance is mainly exhibited by the heat-sensitive adhesion of the heat-sensitive adhesive layer, it is normal assumption that the content of the tackifying resin in the pressure-sensitive adhesive layer affects the dry-cleaning resistance. This is a result exceeding
The reason why cleaning resistance can be improved by reducing the content of the tackifying resin in the adhesive layer is not clear, but when the content of the tackifying resin in the adhesive layer exceeds the above upper limit, dry It is thought that the tackifying resin is eluted into the solvent used for cleaning, and the adhesive layer swells due to the solvent soaking into the label. be done.

The tackifying resin is not particularly limited, and petroleum resin-based tackifying resins: rosin-based tackifying resins such as rosin and rosin derivatives; terpenes such as terpene resins, hydrogenated terpene resins, terpene phenol resins, and aromatic modified terpene resins system tackifying resin; In addition, liquid resins, resin emulsions, alkylphenol resins, phenolic resins, vinyl acetate-based resins, styrene-based resins, and the like, which can be used as tackifying resins, can be mentioned.

The tackifier resin may be at least one tackifier resin selected from the group consisting of petroleum resin-based tackifier resins, styrene-based tackifier resins, terpene-based tackifier resins, and rosin-based tackifier resins.

Petroleum resins are resins derived from petroleum components, fractions such as C5 fractions and _C9 fractions obtained by decomposing naphtha, polymers thereof (e.g., _{C5 - C9} petroleum resins etc.) can be exemplified. Petroleum resin-based tackifying resins can have structural units derived from, for example, indene, styrene, vinyltoluene, isoprene, piperylene, cyclopentadiene, dicyclopentadiene, and the like. Petroleum resin-based tackifying resins include hydrogenated petroleum resins, aliphatic petroleum resins, aromatic petroleum resins, dicyclopentadiene petroleum resins, and the like.

In the present embodiment, "rosin" is a generic term for rosin resins and rosin derivatives.
Such rosins include unmodified rosins such as tall rosin, gum rosin, and wood rosin containing resin acids such as abietic acid, neoabietic acid, parastric acid, pimaric acid, isopimaric acid, and dehydroabietic acid as main components, disproportionated rosins, Including polymerized rosin, hydrogenated rosin, rosin esters, rosin-containing diols, or other chemically modified rosins. Further, "acid-modified" means to impart a carboxyl group to rosin. Specific examples of acid-modified rosin include (meth)acrylic acid, (anhydrous) maleic acid, fumaric acid, itaconic acid, (anhydride) Examples include those obtained by reacting α,β-unsaturated carboxylic acid such as citraconic acid with rosin.

Examples of rosin esters include those obtained by esterifying at least one of rosin and rosin derivatives with alcohols. Examples of alcohols that can be used for esterification include ethylene glycol, propylene glycol, neopentyl glycol, trimethylene glycol, glycerin, pentaerythritol, and dipentaerythritol.

Terpene resins include those obtained by polymerizing terpene monomers. Hydrogenated terpene resins include those obtained by hydrogenating terpene resins. Terpene phenol resins include those obtained by copolymerizing terpene monomers and phenol, and aromatic terpene resins include those obtained by modifying terpene resins with aromatic monomers.

These tackifying resins may be used alone or in combination of two or more.

Polymer component The polymer component (A) includes known adhesive resins such as acrylic resins, urethane resins, rubber resins, silicone resins, epoxy resins, polyvinyl ethers, polycarbonates, and esters. Adhesive resins such as base resins can be mentioned, and acrylic resins are preferable.

Examples of the acrylic resin include an acrylic polymer having at least a structural unit derived from a (meth)acrylic acid alkyl ester, and the polymer component (A) preferably contains an acrylic polymer.
The content of the acrylic polymer may be 50 to 100% by mass, 60 to 100% by mass, or 70 to 100% by mass with respect to the total mass of the heat-sensitive adhesive layer.
The structural units of the acrylic polymer may be of one type or two or more types, and when there are two or more types, the combination and ratio thereof can be arbitrarily selected.

As used herein, "(meth)acrylic acid" is a concept that includes both "acrylic acid" and "methacrylic acid". The same is true for (meth)acrylic acid and similar terms.

Examples of the (meth)acrylic acid alkyl ester include those in which the alkyl group constituting the alkyl ester has 1 to 20 carbon atoms, and the alkyl group is linear or branched. is preferred.
(Meth)acrylic acid alkyl esters, more specifically, methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, isopropyl (meth)acrylate, (meth)acrylic acid n-butyl, isobutyl (meth)acrylate, sec-butyl (meth)acrylate, tert-butyl (meth)acrylate, pentyl (meth)acrylate, hexyl (meth)acrylate, heptyl (meth)acrylate, 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, n-octyl (meth) acrylate, n-nonyl (meth) acrylate, isononyl (meth) acrylate, decyl (meth) acrylate, (meth) ) undecyl acrylate, dodecyl (meth) acrylate (lauryl (meth) acrylate), tridecyl (meth) acrylate, tetradecyl (meth) acrylate (myristyl (meth) acrylate), pentadecyl (meth) acrylate, ( Hexadecyl methacrylate (palmityl (meth)acrylate), heptadecyl (meth)acrylate, octadecyl (meth)acrylate (stearyl (meth)acrylate), nonadecyl (meth)acrylate, icosyl (meth)acrylate, etc. is mentioned.

From the viewpoint of improving the adhesive strength of the pressure-sensitive adhesive layer, the acrylic polymer preferably has a structural unit derived from a (meth)acrylic acid alkyl ester in which the alkyl group has 4 or more carbon atoms. The number of carbon atoms in the alkyl group is preferably 4 to 12, more preferably 4 to 8, from the viewpoint of further improving the adhesive strength of the adhesive layer. In addition, the (meth)acrylic acid alkyl ester in which the alkyl group has 4 or more carbon atoms is preferably an acrylic acid alkyl ester.

It is preferable that the acrylic polymer further has a structural unit derived from a functional group-containing monomer in addition to the structural unit derived from the (meth)acrylic acid alkyl ester.
For the functional group-containing monomer, for example, the functional group reacts with a cross-linking agent to be described later, thereby forming a starting point for cross-linking.

Examples of the functional group in the functional group-containing monomer include hydroxyl group, carboxyl group, amino group, epoxy group and the like.
That is, examples of functional group-containing monomers include hydroxyl group-containing monomers, carboxy group-containing monomers, amino group-containing monomers, and epoxy group-containing monomers.

Examples of the hydroxyl group-containing monomer include hydroxymethyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, (meth) Hydroxyalkyl (meth)acrylates such as 2-hydroxybutyl acrylate, 3-hydroxybutyl (meth)acrylate, and 4-hydroxybutyl (meth)acrylate; Saturated alcohol (unsaturated alcohol having no (meth)acryloyl skeleton) and the like can be mentioned.

Examples of the carboxy group-containing monomer include ethylenically unsaturated monocarboxylic acids (monocarboxylic acids having an ethylenically unsaturated bond) such as (meth)acrylic acid and crotonic acid; fumaric acid, itaconic acid, maleic acid, citracone; ethylenically unsaturated dicarboxylic acids (dicarboxylic acids having an ethylenically unsaturated bond) such as acids; anhydrides of the ethylenically unsaturated dicarboxylic acids; (meth)acrylic acid carboxyalkyl esters such as 2-carboxyethyl methacrylate; be done.

The functional group-containing monomer is preferably a carboxy group-containing monomer.

The functional group-containing monomers constituting the acrylic polymer may be of one type or two or more types, and when two or more types are used, the combination and ratio thereof can be arbitrarily selected.

In the acrylic polymer, the content of structural units derived from functional group-containing monomers is preferably 1 to 35% by mass, more preferably 2 to 32% by mass, based on the total amount of structural units, 3 to 30% by mass is particularly preferred.

The acrylic polymer may further have structural units derived from other monomers in addition to structural units derived from (meth)acrylic acid alkyl esters and structural units derived from functional group-containing monomers.
The other monomer is not particularly limited as long as it is copolymerizable with (meth)acrylic acid alkyl ester or the like.
Examples of the other monomers include styrene, α-methylstyrene, vinyltoluene, vinyl formate, vinyl acetate, acrylonitrile and acrylamide.

The other monomers constituting the acrylic polymer may be of one type or two or more types, and when there are two or more types, the combination and ratio thereof can be arbitrarily selected.

The glass transition temperature (Tg) of the polymer component (A) is preferably −40° C. or less, more preferably −70° C. or more and −40° C. or less, and −60° C. or more and −55° C. or less. is more preferred. When the Tg of the polymer component (A) is equal to or less than the upper limit, the adhesive strength to adherends is improved.
By lowering the glass transition temperature (Tg) of the polymer component (A) instead of increasing the content of the tackifying resin in the pressure-sensitive adhesive layer, the pressure-sensitive adhesiveness of the pressure-sensitive adhesive layer can be enhanced.

The glass transition temperature (Tg) of the polymer component (A) can be calculated using the following Fox formula.
1/Tg=(W1/Tg1)+(W2/Tg2)+...+(Wm/Tgm) (Wherein, Tg is the glass transition temperature of the polymer component, and Tg1, Tg2,...Tgm are the raw materials of the polymer. is the glass transition temperature of the homopolymer of each monomer, and W1, W2, ... Wm is the mass fraction of each monomer, where W1 + W2 + ... + Wm = 1.)
For the glass transition temperature of the homopolymer of each monomer in the Fox formula, the values described in Kobunshi Data Handbook, Adhesive Handbook, or Polymer Handbook can be used. For example, a homopolymer of methyl acrylate has a Tg of 10°C, a homopolymer of 2-hydroxyethyl acrylate has a Tg of -15°C, a homopolymer of 2-ethylhexyl acrylate has a Tg of -70°C, and 2-ethylhexyl methacrylate. has a Tg of -10°C.

The content of structural units derived from 2-ethylhexyl acrylate is preferably 50% by mass or more, more preferably 50 to 70% by mass, based on 100% by mass of the polymer component (A). More preferably, it is 55 to 65% by mass. As described above, 2-ethylhexyl acrylate has a low Tg. Therefore, by setting the content of structural units derived from 2-ethylhexyl acrylate in the polymer component (A) to be equal to or more than the above lower limit, the pressure-sensitive adhesive The pressure sensitive adhesion of the layer can be effectively enhanced.

The pressure-sensitive adhesive layer can be formed using a pressure-sensitive adhesive composition containing components constituting the pressure-sensitive adhesive layer. The pressure-sensitive adhesive composition preferably contains a cross-linking agent in addition to the polymer component (A).

Examples of cross-linking agents include tolylene diisocyanate, hexamethylene diisocyanate, xylylene diisocyanate, isocyanate-based cross-linking agents (cross-linking agents having isocyanate groups) such as adducts of these diisocyanates; epoxy-based cross-linking agents such as ethylene glycol glycidyl ether ( aziridinyl cross-linking agents such as hexa[1-(2-methyl)-aziridinyl]triphosphatriazine (cross-linking agents having an aziridinyl group); metal chelate cross-linking agents such as aluminum chelate (metal cross-linking agents having a chelate structure); isocyanurate-based cross-linking agents (cross-linking agents having an isocyanuric acid skeleton); Aldehyde compounds, metal alkoxides, metal salts and the like can also be used.

Examples of aluminum chelate compounds include diisopropoxyaluminum monooleyl acetoacetate, monoisopropoxyaluminum bisoleyl acetoacetate, monoisopropoxyaluminum monooleate monoethylacetoacetate, diisopropoxyaluminum monolaurylacetoacetate, diisopropoxy Aluminum monostearylacetoacetate, diisopropoxyaluminum monoisostearylacetoacetate, monoisopropoxyaluminum mono-N-lauroyl-β-alanate monolaurylacetoacetate, aluminum trisacetylacetonate, monoacetylacetonate aluminum bis(isobutylacetate) acetate) chelate, monoacetylacetonate aluminum bis(2-ethylhexylacetoacetate) chelate, monoacetylacetonate aluminum bis(dodecylacetoacetate) chelate, monoacetylacetonate aluminum bis(oleylacetoacetate) chelate and the like.

The cross-linking agent contained in the pressure-sensitive adhesive composition may be of one type or two or more types, and when there are two or more types, the combination and ratio thereof can be arbitrarily selected.

The content of the cross-linking agent in the adhesive composition is preferably 0.1 parts by mass or more and 10 parts by mass or less with respect to 100 parts by mass of the content of the polymer compound (A), and 0.5 parts by mass. It is more preferably 5 parts by mass or less, and further preferably 0.8 parts by mass or more and 3 parts by mass or less.

By including a cross-linking agent in the pressure-sensitive adhesive composition, it is possible to improve the dry-cleaning resistance of the label.
The cross-linking agent, for example, cross-links the polymer component (A) contained in the pressure-sensitive adhesive layer to make the pressure-sensitive adhesive layer stronger, improve dry cleaning resistance, or By cross-linking the polymer component (A) and the polymer component (B) contained in the heat-sensitive adhesive layer described later, the bond at the interface between the pressure-sensitive adhesive layer and the heat-sensitive adhesive layer is strengthened and the dry resistance is improved. Cleanability can be improved.

The cross-linking agent according to this embodiment may not form a cross-linked structure with the tackifying resin.

In the label 1 of the embodiment, the adhesive layer 30 is provided between the heat-sensitive adhesive layer 20 and the adherend.
In Patent Documents 1 and 2, a layer corresponding to the pressure-sensitive adhesive layer is provided on a part of the surface of the layer corresponding to the heat-sensitive adhesive layer in order to prevent the heat-sensitive adhesion from being hindered.
On the other hand, in the label of the embodiment, the cleaning resistance of the heat-sensitive adhesive layer is improved by reducing the content of the tackifying resin in the pressure-sensitive adhesive layer. It is not necessary to have a configuration in which the adhesive layer is provided only on the part.

In the label 1 of the embodiment, the adhesive layer 30 is preferably provided in 70 to 100 area %, more preferably 90 to 100 area %, with respect to 100 area % of the surface of the heat-sensitive adhesive layer 20. More preferably, it is provided over the entire surface (100 area %).
By providing the pressure-sensitive adhesive layer 30 with an area percentage equal to or greater than the above lower limit, the thickness of the label is made uniform, the adhesion to the adherend is improved, and the resistance to dry cleaning can be improved.

The pressure-sensitive adhesive layer may consist of one layer (single layer) or may consist of two or more layers. The combination of these multiple layers is not particularly limited.

Although the thickness of the adhesive layer is not particularly limited, it is preferably 16 μm or less, more preferably 15 μm or less, even more preferably 1 to 13 μm, particularly preferably 5 to 11 μm.
In order to improve the pressure-sensitive adhesive strength, it is common to increase the thickness of the adhesive layer. I wish I could demonstrate it. In addition, when the thickness of the pressure-sensitive adhesive layer is equal to or less than the above upper limit, adhesion between the heat-sensitive adhesive layer and clothing or the like to which it is applied is less likely to be hindered.

Here, the thickness of the pressure-sensitive adhesive layer means the thickness of the entire pressure-sensitive adhesive layer. means

From the above viewpoint, the adhesive strength of the adhesive layer is measured according to JIS K6854-3 at a peeling speed of 300 mm / min, and the T-type peeling adhesive strength between the cotton cloth is 0.5 to 30 N / 25 mm. , more preferably 2 to 20 N/25 mm, even more preferably 3 to 15 N/25 mm. Here, the adhesive force is the adhesive force of the adhesive layer (of the label that is not thermally adhered) before the label is thermally adhered.
When the adhesive strength of the pressure-sensitive adhesive layer is at least the above lower limit value, it is suitable for temporary fixing to an object to be adhered, and when it is at most the above upper limit value, re-peeling becomes easy, which is preferable.

<Heat-sensitive adhesive layer>
The heat-sensitive adhesive layer 20 in the label 1 according to the embodiment is a layer that has heat-sensitive adhesive properties and enables the label to be attached to an adherend such as clothing by heat-sensitive adhesion. The term “heat-sensitive adhesiveness” refers to the property that the heat-sensitive adhesive layer can be heated, melted, and hardened again so that it can be adhered to an adherend.
Heat-sensitive adhesion includes thermocompression bonding (bonding by applying heat and pressure) to an adherend using an iron, press machine, or the like.
After the heat-sensitive adhesive layer is heated to a temperature equal to or higher than its melting point, the label is adhered to the adherend by cooling. By adopting heat-sensitive adhesion, the adhesion to the adherend becomes strong, and a label having excellent resistance to dry cleaning can be obtained.

In the label 1 of the embodiment, the pressure-sensitive adhesive layer 30 is provided between the heat-sensitive adhesive layer 20 and the adherend. When the label is heated or pressurized, the pressure-sensitive adhesive layer 30 is deformed and heat-sensitive. It is believed that the adhesive layer 20 is exposed and adheres to the adherend.

The composition of the heat-sensitive adhesive layer is not particularly limited as long as it has heat-sensitive adhesive properties. The heat-sensitive adhesive layer does not exhibit adhesiveness at room temperature (23° C.), for example, but exhibits adhesiveness when heated. The heating temperature of the heat-sensitive adhesive layer can be appropriately determined according to the composition of the heat-sensitive adhesive layer, and heat-sensitive adhesion can be exhibited by heating at a temperature equal to or higher than the melting point of the heat-sensitive adhesive layer.

The heat-sensitive adhesive layer preferably contains the polymer component (B). Examples of the polymer component (B) include adhesive thermoplastic resins such as polyolefin-based resins and polyester-based resins.
Polyolefin-based resins include, for example, polyethylene (low-density polyethylene, medium-density polyethylene, high-density polyethylene, etc.), polypropylene, polybutene, polyisobutylene, polybutadiene, polyisoprene, and the like.
Further, the heat-sensitive adhesive layer may be composed of olefin copolymers such as ethylene-α/olefin copolymers and ethylene-propylene copolymers; ethylene-acrylic acid copolymers, ethylene-methacrylic acid copolymers, ethylene-acrylic acid Acrylic polymers such as acid ester copolymers and ethylene-methacrylic acid ester copolymers; may contain vinyl acetate polymers such as ethylene-vinyl acetate copolymers (EVA); , may contain an acid-modified polyolefin obtained by acid-modifying these.

The polymer component (B) may have functional groups capable of bonding with other compounds, such as vinyl groups, (meth)acryloyl groups, amino groups, hydroxyl groups, and carboxy groups.
For example, the polymer component (B) having the functional group may be crosslinked with the polymer component (A) contained in the heat-sensitive adhesive layer via a crosslinking agent. Examples of the cross-linking agent include those exemplified for the adhesive layer described above, which react with the polymer component (A) contained in the adhesive layer and the polymer component (B) contained in the heat-sensitive adhesive layer. It is preferably a cross-linking agent that bonds together.
By cross-linking the polymer component (A) contained in the adhesive layer and the polymer component (B) contained in the heat-sensitive adhesive layer described later, adhesion of the interface between the adhesive layer and the heat-sensitive adhesive layer is achieved. becomes strong, and dry cleaning resistance can be improved.

The heat-sensitive adhesive layer preferably has a melting point of 130° C. or lower, more preferably 50° C. or higher and 120° C. or lower, even more preferably 70° C. or higher and 110° C. or lower.
When the melting point of the heat-sensitive adhesive layer is equal to or less than the above upper limit, the heat-sensitive adhesive strength is appropriately exhibited at a practical heating temperature, and the dry-cleaning resistance is improved.

The heat-sensitive adhesive layer may consist of a single layer or may consist of multiple layers. In the case of multiple layers, each layer may be the same or different.

The thickness of the heat-sensitive adhesive layer can be appropriately set, and is preferably 15 to 300 μm, more preferably 30 to 200 μm, and even more preferably 40 to 100 μm. When the thickness of the heat-sensitive adhesive layer is within the above range, the dry-cleaning resistance is good.

Here, the thickness of the heat-sensitive adhesive layer means the thickness of the whole heat-sensitive adhesive layer. It means the total thickness of the layers.

<Release liner>
The release liner 40 is provided on the side of the adhesive layer 30 opposite to the side on which the heat-sensitive adhesive layer 20 is provided.

The release liner 40 is not particularly limited, and in general, a known release liner having one side of a sheet subjected to release treatment can be appropriately selected and used. Examples of the liner that can be used for the release liner 40 include paper such as glassine paper, fine paper, and kraft paper, laminated paper obtained by laminating these papers with a thermoplastic resin such as polyethylene, polyethylene terephthalate, polybutylene terephthalate, and polyethylene. Examples include polyester films such as naphthalate, and polyolefin films such as polyethylene and polypropylene.

Examples of release agents for release treatment include silicones, long-chain alkyl-based resins, fluorine-based resins, and the like.
Although the thickness of the release liner 40 is not particularly limited, it is preferably 10 to 150 μm, more preferably 20 to 130 μm.

The total thickness of each layer of the label 1 of the embodiment, excluding the release liner 40, is preferably 60-100 μm, more preferably 63-90 μm, and particularly preferably 65-80 μm.

≪Label manufacturing method≫
Manufacture of a label can be manufactured by a well-known method. The label manufacturing method according to the present invention comprises providing a heat-sensitive adhesive layer on one surface of a substrate, and providing a pressure-sensitive adhesive layer on the surface of the heat-sensitive adhesive layer opposite to the substrate. The pressure-sensitive adhesive layer contains the polymer component (A), and the content of the tackifying resin is 10 parts by mass or less with respect to 100 parts by mass of the polymer component of the pressure-sensitive adhesive layer.

The pressure-sensitive adhesive layer having a tackifying resin content ratio of 10 parts by mass or less with respect to 100 parts by mass of the polymer component has a tackifying resin content ratio of 10 parts by mass with respect to 100 parts by mass of the polymer component. It can be formed by the adhesive composition blended below.

In addition, the content ratio of the components that do not vaporize at room temperature in the pressure-sensitive adhesive composition is usually the same as the content ratio of the above-described components in the pressure-sensitive adhesive layer. In this specification, the term "ordinary temperature" means a temperature at which no particular cooling or heating is applied, that is, a normal temperature.

First, a method for manufacturing a label according to the present invention will be described below by taking the method for manufacturing the label 1 as an example.
In the method for manufacturing the label 1 of the present embodiment, the heat-sensitive adhesive layer 20 is provided on one side of the base material 10, and the heat-sensitive adhesive layer 20 on the side opposite to the side on which the base material 10 is laminated. and providing an adhesive layer 30 on.

For example, a heat-sensitive adhesive composition containing components constituting a heat-sensitive adhesive layer and optionally a solvent is applied onto the substrate 10 by a roll coater, a knife coater, a roll knife coater, an air knife coater, a die coater, and a bar. It is applied by a coating machine such as a coater, gravure coater, or curtain coater and dried to obtain a laminate A in which the base material 10 and the heat-sensitive adhesive layer 20 are laminated.
A commercially available heat-sealing agent can be used as the heat-sensitive adhesive composition.

Alternatively, a pressure-sensitive adhesive composition containing components constituting the pressure-sensitive adhesive layer 30 and optionally a solvent is prepared on the release liner 40, and the pressure-sensitive adhesive composition is applied to the release-treated surface of the release liner 40 by a coating machine. The composition is applied and dried to obtain a laminate B in which the release liner 40 and the pressure-sensitive adhesive layer 30 are laminated.

Next, the exposed surface of the heat-sensitive adhesive layer 20 of the laminate A produced above and the exposed surface of the adhesive layer 30 of the laminate B are pressure-bonded to form the substrate 10, the heat-sensitive adhesive layer 20, and the adhesive. A label 1 can be produced in which the layers 30 are laminated in that order.

When the pressure-sensitive adhesive composition contains a cross-linking agent, a cross-linked structure due to the cross-linking agent can be formed by allowing the pressure-sensitive adhesive layer to stand at room temperature for about 7 days, for example.

≪How to use the label≫
The label of the embodiment can be used by attaching an object that can be dry cleaned as an adherend.
Objects to be dry cleaned include clothes such as shirts, skirts, pants, hats, mufflers, and socks, bedding such as pillows and sheets, covers, curtains, throws, shoes, and bags. As the surface to which the label is attached, the cloth surface provided on the object is preferable. Cloth refers to all materials woven from natural fibers or chemical fibers.

As used herein, the term "dry cleaning" refers to all cleaning methods using solvents other than water. The solvent is not particularly limited as long as it can be used for dry cleaning, and examples thereof include petroleum solvents such as perchlorethylene and gasoline, and perchlorethylene is preferred.

As a method for using the label of the embodiment, the pressure-sensitive adhesive layer is brought into contact with an adherend that can be dry cleaned, and the pressure-sensitively adhered label is heated to adhere to the adherend. and heat-adhering the label to the adherend.

As a method of using the label of the embodiment, a method including a step of dry cleaning an adherend and a label heat-sensitively adhered to the adherend can be exemplified.

The above heating temperature can be appropriately determined according to the composition of the heat-sensitive adhesive layer, and includes heating at a temperature equal to or above the melting point of the heat-sensitive adhesive layer. ~200°C and may be 140-170°C.

Also, when heating, thermocompression bonding (bonding by applying heat and pressure) using an iron, a press machine, or the like can be employed. As the pressure on the label, about 0.5 to 10 kg/cm ² can be exemplified.

Labels of embodiments can be printed or printed on the surface. A print or print may be applied to the surface of the substrate. A known printing device can be used for printing.
The print or print may be applied before or after the label of the embodiment is attached to the adherend.

The following configuration can be exemplified as a preferred usage of the cleaning label of the embodiment.

In the cleaning label of the embodiment, the substrate is printed or printed,
The printed or printed information includes owner information of an object to be dry-cleaned with the cleaning label attached, cleaning shop information, an object control code, and an object control number. any one or more dry cleaning information selected from the group, or
Any one or more selected from the group consisting of washing indications, washing symbols, sizes, handling precautions including washing or dry cleaning methods, material types, fiber compositions, and names of those who display them Object information is preferred.

A label having the dry cleaning information described above can be used as a cleaning label that is attached to an article to be dry cleaned and then dry cleaned together with the article.

A label having the above-described object information can be used as a label for indicating quality, which is used after being dry-cleaned together with the article after being attached to the article to be dry-cleaned.

Cleaning labels and quality indication labels are included in the cleaning labels of the embodiments.

≪Manufacturing method of tag≫
The label of the embodiments described above can be applied to a structure comprising a second substrate and used to manufacture cleaning tags.

In the cleaning tag manufacturing method of the embodiment, a second obtaining a laminate comprising the first base material, the heat-sensitive adhesive layer, the pressure-sensitive adhesive layer, and the second base material in this order by pressure-sensitive bonding of base materials;
heat-treating the laminate to heat-sensitively bond the first base material and the second base material via the heat-sensitive adhesive layer.

Examples of the first base material include those exemplified as the base material in the above embodiment. Examples of the heat-sensitive adhesive layer and pressure-sensitive adhesive layer include those exemplified in the above embodiments.

Examples of the second base material include those exemplified as the first base material. The second substrate is preferably a film, cloth or non-woven fabric.

The first base material and the second base material may be a combination of the same materials, or may be a combination of different materials.
For example, a combination in which the first base material is cloth and the second base material is cloth, or a combination in which the first base material is cloth and the second base material is a film can be exemplified.

The total thickness of each layer of the tag of the embodiment is preferably 25-2000 μm, more preferably 50-1000 μm, even more preferably 100-500 μm.

EXAMPLES Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to the following examples.

<Production of label>
[Example 1]
Crisper (Toyobo Co., Ltd., model number: K2411, thickness 50 μm) was prepared as a base material. Next, as a polyolefin-based heat-sensitive adhesive composition, low-density polyethylene (Sumitomo Chemical Co., Ltd., Sumikasen, model number: L405, melting point: 111° C.) is melt-extruded to a thickness of 15 μm to form a heat-sensitive adhesive on the substrate. formed a layer.
Acrylic pressure-sensitive adhesive composition [a polymer of 2-ethylhexyl acrylate (60 parts by mass), n-butyl acrylate (30 parts by mass), methyl acrylate (7 parts by mass), and acrylic acid (3 parts by mass), and solvent: a mixture of toluene (30 parts by mass)] (calculated Tg of the polymer component = -52.7°C), and coated on the release liner with a knife coater so that the thickness after drying is 10 µm, It was dried at 100° C. for 1 minute to form an adhesive layer.
The exposed surface of the pressure-sensitive adhesive layer thus formed and the exposed surface of the heat-sensitive adhesive layer of the laminate of the substrate and the heat-sensitive adhesive layer were overlapped and pressed together to obtain a label of Example 1.

[Example 2]
The heat-sensitive adhesive composition used in Example 1 was replaced with a polyolefin-based water-based dispersion (Sumitomo Seika Co., Ltd., Zaixen AC, melting point 90° C.), applied so that the thickness after drying was 10 μm, and dried. A label of Example 2 was obtained by the same operation as in Example 1, except that the label of Example 2 was obtained.

[Example 3]
Example 3 was prepared in the same manner as in Example 1, except that the heat-sensitive adhesive composition used in Example 1 was replaced with an EVA-based heat-sensitive adhesive composition (contains 5% by mass of vinyl acetate, melting point: 100°C). got the label of

[Example 4]
Example 4 was prepared in the same manner as in Example 1, except that the heat-sensitive adhesive composition used in Example 1 was replaced with an EVA-based heat-sensitive adhesive composition (contains 42% by mass of vinyl acetate, melting point: 50°C). got the label of

[Example 5]
The heat-sensitive adhesive composition used in Example 1 was replaced with an EVA-based heat-sensitive adhesive composition (containing 14% by mass of vinyl acetate, containing 6% by mass of acrylic acid, and a melting point of 77° C.), and the acrylic adhesive composition was replaced with [ Polymer of 2-ethylhexyl acrylate (60 parts by mass), n-butyl acrylate (30 parts by mass), methyl acrylate (7 parts by mass), and acrylic acid (3 parts by mass), cross-linking agent: aluminum tris (acetyl Acetonate) (0.5 parts by mass) and the solvent: a mixture of toluene (30 parts by mass)] was changed to obtain a label of Example 5 in the same manner as in Example 1.

[Comparative Example 1]
A label of Comparative Example 1 was obtained in the same manner as in Example 1, except that the pressure-sensitive adhesive layer was not provided.

[Comparative Example 2]
A label of Comparative Example 2 was obtained in the same manner as in Example 1, except that the heat-sensitive adhesive layer was not provided.

[Comparative Example 3]
The pressure-sensitive adhesive composition used in Example 2 contains a petroleum resin-based tackifying resin (manufactured by Arakawa Chemical, P-90, softening point 90 ° C.) [2-ethylhexyl acrylate (60 parts by mass), acrylic acid n - A mixture of a polymer of butyl (30 parts by weight), methyl acrylate (7 parts by weight) and acrylic acid (3 parts by weight), the tackifying resin (10 parts by weight), and solvent: toluene (30 parts by weight) A label of Comparative Example 3 was obtained in the same manner as in Example 2, except that the label was changed to .

[Comparative Example 4]
Comparative Example 4 was prepared in the same manner as in Comparative Example 3, except that the tackifying resin used in Comparative Example 3 was replaced with a petroleum resin-based tackifying resin (manufactured by Arakawa Chemical, P-140, softening point 140 ° C.). got the label.

[Comparative Example 5]
A label of Comparative Example 5 was produced in the same manner as in Comparative Example 3, except that the tackifying resin used in Comparative Example 3 was replaced with a styrene-based tackifying resin (manufactured by Yasuhara Chemical Co., Ltd., YS Resin SX100, softening point 100° C.). Obtained.

[Comparative Example 6]
Comparative Example 6 was performed in the same manner as in Comparative Example 3, except that the tackifying resin used in Comparative Example 3 was replaced with a terpene-based tackifying resin (manufactured by Yasuhara Chemical Co., Ltd., YS Resin PX1000, terpene resin, softening point 100 ° C.). got the label of

[Comparative Example 7]
Comparative Example 7 was performed in the same manner as in Comparative Example 3, except that the tackifying resin used in Comparative Example 3 was replaced with a terpene-based tackifying resin (manufactured by Yasuhara Chemical Co., Ltd., YS Resin PX1250, terpene resin, softening point 125 ° C.). got the label of

[Comparative Example 8]
The same operation as in Comparative Example 3 was performed except that the tackifying resin used in Comparative Example 3 was replaced with a terpene-based tackifying resin (manufactured by Yasuhara Chemical, YS resin TO105, aromatic terpene resin, softening point 105 ° C.). A label for Example 8 was obtained.

[Comparative Example 9]
Comparative Example 3 was performed in the same manner as in Comparative Example 3, except that the tackifying resin used in Comparative Example 3 was replaced with a terpene-based tackifying resin (manufactured by Yasuhara Chemical Co., Ltd., YS Polyster T100, terpene phenolic resin, softening point 100 ° C.). 9 labels were obtained.

[Comparative Example 10]
Comparative Example 3 was performed in the same manner as in Comparative Example 3, except that the tackifier resin used in Comparative Example 3 was replaced with a terpene-based tackifier resin (manufactured by Yasuhara Chemical, YS Polyster T160, terpene phenol resin, softening point 160 ° C.). 10 labels were obtained.

[Comparative Example 11]
Comparative Example 3 was performed in the same manner as in Comparative Example 3 except that the tackifying resin used in Comparative Example 3 was replaced with a rosin-based tackifying resin (Arakawa Chemical Co., Ltd., A-100, rosin ester, softening point 100 ° C.). 11 labels were obtained.

[Comparative Example 12]
Comparative Example 3 was performed in the same manner as in Comparative Example 3 except that the tackifying resin used in Comparative Example 3 was replaced with a rosin-based tackifying resin (Arakawa Chemical Co., Ltd., A-125, rosin ester, softening point 125 ° C.). 12 labels were obtained.

[Comparative Example 13]
Comparative Example 3 was performed in the same manner as in Comparative Example 3, except that the tackifying resin used in Comparative Example 3 was replaced with a rosin-based tackifying resin (manufactured by Arakawa Chemical, HP, hydrogenated rosin ester, softening point 80 ° C.). 13 labels were obtained.

[Comparative Example 14]
Comparative Example 3 was performed in the same manner as in Comparative Example 3, except that the tackifying resin used in Comparative Example 3 was replaced with a rosin-based tackifying resin (manufactured by Yasuhara Chemical, D-125, polymerized rosin ester, softening point 125 ° C.). 14 labels were obtained.

[Comparative Example 15]
Comparative Example 3 was performed in the same manner as in Comparative Example 3, except that the tackifying resin used in Comparative Example 3 was replaced with a rosin-based tackifying resin (Yasuhara Chemical Co., Ltd., D-160, polymerized rosin ester, softening point 160 ° C.). 15 labels were obtained.

[Comparative Example 16]
By the same operation as in Comparative Example 3, except that the tackifying resin used in Comparative Example 3 was replaced with a rosin-based tackifying resin (manufactured by Arakawa Chemical, KR-140, ultralight polymerized rosin, softening point 140 ° C.). A label of Comparative Example 16 was obtained.

[Comparative Example 17]
By the same operation as in Comparative Example 3, except that the tackifying resin used in Comparative Example 3 was replaced with a rosin-based tackifying resin (KE-359, manufactured by Arakawa Chemical, ultra-light rosin ester, softening point 99 ° C.). A label of Comparative Example 17 was obtained.

[Comparative Example 18]
By the same operation as in Comparative Example 3, except that the tackifying resin used in Comparative Example 3 was replaced with a rosin-based tackifying resin (manufactured by Arakawa Chemical, D-6011, rosin-containing diol, softening point 91.5 ° C.). , to obtain the label of Comparative Example 18.

[Comparative Example 19]
By the same operation as in Comparative Example 3, except that the tackifying resin used in Comparative Example 3 was replaced with a rosin-based tackifying resin (KE-604, acid-modified rosin ester, made by Arakawa Chemical Co., Ltd., softening point 129 ° C.). A label of Comparative Example 19 was obtained.

[Comparative Example 20]
Comparative Example 3 was performed in the same manner as in Comparative Example 3, except that the tackifying resin used in Comparative Example 3 was replaced with a terpene-based tackifying resin (manufactured by Arakawa Chemical, 803L, terpene phenol resin, softening point 152.5 ° C.). A label for Example 20 was obtained.

[Comparative Example 21]
Comparative Example 21 was prepared in the same manner as in Comparative Example 3, except that the tackifier resin used in Comparative Example 3 was replaced with a terpene-based tackifier resin (manufactured by Arakawa Chemical, 901, terpene phenolic resin, softening point 130° C.). got the label of

Tables 1 to 3 show the label configurations of the above examples and comparative examples. "-" in the table indicates that the corresponding component is not contained.

[Evaluation of the physical properties]
The physical properties of the labels produced in the above examples and comparative examples were evaluated as follows.

(Measurement of adhesive strength of adhesive layer of label before thermal adhesion)
The release liner is peeled off from each label obtained in the above Examples and Comparative Examples, the label is superimposed on a cotton cloth (Kanakin No. 3, Japanese Standards Association, JIS L0803 compliant), and a rubber roller weighing 2000 g is reciprocated once. pasted together by After leaving for 30 minutes in an environment of humidity 23° C. and humidity 50% RH, the T-peel adhesive strength between the label and the cotton cloth was measured according to JIS K6854-3 at a peel speed of 300 mm/min.
The measurement results are shown in Tables 1-3.

(Evaluation of dry cleaning resistance)
After a dry cleaning test according to JIS L 0860 A1 method, it was visually determined whether or not the label was peeled off.
x: Peeling of the label occurred over the entire surface of the adhered portion.
Δ: Peeling of the label occurred at a part of the place where the label was attached.
Good: Almost no peeling occurred at the adhered portion, but peeling was confirmed at a part of the edge of the label.
⊚: Peeling of the label is not confirmed on the entire surface of the affixed portion.

・Test piece Each label obtained in the above examples and comparative examples was cut into a width of 20 mm and a length of 30 mm. , to an adherend (Kanakin No. 3).
After that, it was pressurized and heated under the conditions of 1 kg/cm ² load and 140° C. for 5 seconds using a pressurizing and heating machine.
・Test solution Add 5 g of anionic surfactant (di-2-ethylhexyl sodium sulfosuccinate), 5 g of nonionic surfactant (polyoxyethylene alkyl ether), and 1 mL of water to 1 L of perchlorethylene and mix well. A test solution was prepared by dissolving and preparing a homogeneous and transparent solution.
- Test 100 mL of the test solution prepared above and 20 stainless steel balls were placed in a test bottle, and the test solution was adjusted to 30°C ± 2°C. A test piece was placed in this, it was sealed, attached to a washing tester, and operated at 30° C.±2° C. for 30 minutes. After taking out the test piece from the test bottle and lightly rinsing it with 100 mL of perchlorethylene, excess liquid was removed and dried in a dryer at 60°C or less.
The evaluation results are shown in Tables 1-3.

The label of Comparative Example 1 did not have an adhesive layer and did not have adhesive strength. That is, the label of Comparative Example 1 lacked aptitude for pressure-sensitive adhesion of the label to the target position before heat-sensitive adhesion.

The label of Comparative Example 2 did not have a heat-sensitive adhesive layer and lacked dry-cleaning resistance.

In addition, the labels of Comparative Examples 3 to 21, which contain more than 10 parts by mass of the tackifying resin with respect to 100 parts by mass of the polymer component of the adhesive layer, are equipped with a heat-sensitive adhesive layer and an adhesive layer, and the sticking suitability is Although it was good, it was poor in dry-cleaning resistance.

On the other hand, the labels of Examples 1 to 5, which had a heat-sensitive adhesive layer and an adhesive layer and did not contain a tackifying resin in the adhesive layer, were excellent in sticking suitability and resistance to dry cleaning.

In particular, the label of Example 5, in which the pressure-sensitive adhesive layer was formed with the pressure-sensitive adhesive composition containing a cross-linking agent, was particularly excellent in dry-cleaning resistance.
In the label of Example 5, the heat-sensitive adhesive composition of the heat-sensitive adhesive layer has a carboxyl group derived from acrylic acid, the pressure-sensitive adhesive composition of the pressure-sensitive adhesive layer has a carboxyl group derived from acrylic acid, These functional groups become cross-linking points, and cross-linking with a cross-linking agent strengthens the adhesion of the interface between the pressure-sensitive adhesive layer and the heat-sensitive adhesive layer, preventing peeling at the interface. It is presumed that the strength against ethylene was increased and the resistance to dry cleaning was improved.

Each configuration and combination thereof in each embodiment is an example, and addition, omission, replacement, and other modifications of the configuration are possible without departing from the scope of the present invention. Moreover, the present invention is not limited by each embodiment, but is limited only by the scope of the claims.

DESCRIPTION OF SYMBOLS 1... Cleaning label, 10... Base material, 20... Thermal adhesive layer, 30... Adhesive layer, 40... Release liner

Claims (10)

a substrate;
a heat-sensitive adhesive layer laminated on one side of the substrate;
a pressure-sensitive adhesive layer laminated on the surface of the heat-sensitive adhesive layer opposite to the side on which the base material is laminated;
with
The pressure-sensitive adhesive layer contains a polymer component (A),
A label for cleaning, wherein the content of the tackifying resin is less than 10 parts by mass with respect to 100 parts by mass of the polymer component (A) in the pressure-sensitive adhesive layer. 2. The tackifying resin according to claim 1, wherein the tackifying resin is at least one tackifying resin selected from the group consisting of petroleum resin-based tackifying resins, styrene-based tackifying resins, terpene-based tackifying resins, and rosin-based tackifying resins. cleaning label. The cleaning label according to claim 1 or 2, wherein the polymer component (A) has a glass transition temperature (Tg) of -40°C or lower. The cleaning label according to any one of claims 1 to 3, wherein the polymer component (A) contains an acrylic polymer. 5. The cleaning label according to claim 4, wherein the content of structural units derived from 2-ethylhexyl acrylate is 50% by mass or more based on 100% by mass of the polymer component (A). The cleaning label according to any one of claims 1 to 5, wherein the pressure-sensitive adhesive layer has a thickness of 15 µm or less. The cleaning label according to any one of claims 1 to 6, wherein the heat-sensitive adhesive layer has a melting point of 130°C or less. The heat-sensitive adhesive layer contains a polymer component (B),
8. The polymer component (A) contained in the adhesive layer and the polymer component (B) contained in the heat-sensitive adhesive layer are crosslinked via a crosslinking agent. A label for cleaning according to item 1. The substrate according to any one of claims 1 to 8, wherein the substrate is at least one selected from the group consisting of a foamed resin film, a synthetic paper having microvoids, and a resin film having microvoids. Cleaning label. A heat-sensitive adhesive layer is provided on one side of the base material,
Providing a pressure-sensitive adhesive layer on the surface of the heat-sensitive adhesive layer opposite to the side on which the base material is laminated,
The pressure-sensitive adhesive layer contains a polymer component (A),
The method for producing a cleaning label according to any one of claims 1 to 9, wherein the content of the tackifying resin is 10 parts by mass or less with respect to 100 parts by mass of the polymer component of the adhesive layer.

Images