JP2004275038A - Excrement absorption sheet - Google Patents

Abstract

An object of the present invention is to provide an excrement absorbing sheet that can prevent urine of a pet from scattering even in a place without a wall and can be used at any place in a room.
A shape-retaining sheet is laminated on at least one surface of an excrement-absorbing sheet main body composed of a water-absorbing top sheet and a water-impermeable back sheet, and a bent portion is formed by bending the shape-retaining sheet. The excrement absorbing sheet is characterized by being provided, the shape retention sheet is a stretched olefin-based resin sheet with a draw ratio of 10 to 40 times, and the stretching direction of the stretched olefin-based resin sheet It is preferable that the layers are stacked so that the bending direction is substantially perpendicular.
[Selection] Fig. 2

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an excrement absorbing sheet for absorbing excrement of pets.
[0002]
[Prior art]
Recently, a pet excrement absorbing sheet has been used to treat excrement of pets such as dogs and cats kept at home. This pet excrement absorbing sheet is generally composed of a liquid-permeable top sheet such as a nonwoven fabric, a liquid-impermeable back sheet such as a resin film, and an absorbent core interposed between the top sheet and the back sheet. I was
[0003]
However, depending on the position of the pet at the time of urination, urine may scatter outside the excrement absorbing sheet.Especially, bull dogs and others instinctively raise their hind legs and urinate sideways, so There was a problem that a large amount of particles scattered and the surrounding walls became dirty.
[0004]
In order to solve such a problem, a urinary mat for a bull dog (see, for example, Patent Literature 1), a rectangular absorption mat that can be folded from a rectangular absorption mat and installed continuously from the floor to a wall, a square absorption mat, and this absorption mat And a flap extending from at least one side of the excrement absorbent sheet, wherein the flap has an extension length that is 0.3 times or more the length of a side of the absorption mat parallel to the extension direction of the flap. (For example, see Patent Document 2).
[0005]
[Patent Document 1]
Japanese Patent Publication No. Hei 3-6205 [Patent Document 2]
JP 2001-8568 A
However, these excrement absorbing sheets can prevent urine from scattering to the wall side, but cannot prevent urine from scattering in the direction without a wall, and prevent urine from scattering in places without walls. I could not use it because I could not do it.
[0007]
[Problems to be solved by the invention]
The present invention has been made in view of the above problems, and provides a waste excrement absorbing sheet that can prevent pet urine from scattering even in a place without a wall and can be used in any place in a room. It is in.
[0008]
[Means for Solving the Problems]
The excrement absorbing sheet of the present invention is formed by laminating a shape-retaining sheet on one surface of a body of an excrement-absorbing sheet composed of a water-absorbent top sheet and a water-impermeable back sheet, and is folded by folding the shape-retaining sheet. It is characterized in that a curved portion is erected.
[0009]
The topsheet used in the present invention may be any sheet having a water-absorbing property, but is preferably formed of a water-permeable sheet and a water-absorbing mat laminated on the back surface thereof.
[0010]
The water-permeable sheet is not particularly limited as long as it is a sheet having water permeability, and examples thereof include polyethylene resin fibers, polypropylene resin fibers, nylon resin fibers, polyester resin fibers, acrylic resin fibers, rayon fibers, cotton, and cloth. Woven and non-woven fabrics are mentioned. Further, a sheet in which through holes are provided in a synthetic resin film such as a polyethylene resin or a polypropylene resin may be used.
[0011]
The water-absorbent mat is not particularly limited as long as it is a mat-like material having a water-absorbent property.For example, a laminated body in which a highly water-absorbent resin layer is laminated on both sides of a pulp or a pulp layer in which a highly water-absorbent resin is dispersed is provided. Further, those packaged with a water-absorbing paper such as a tissue are preferable.
[0012]
As the above superabsorbent resin, any conventionally known superabsorbent resins can be used, for example, polyacrylic acid type, polyvinyl alcohol type, maleic anhydride and other addition polymers, polyether type, starch type, cellulose type. And other polysaccharides and proteins such as collagen.
[0013]
The back sheet used in the present invention is a sheet for preventing excrement such as urine of pets from passing therethrough and preventing floors and the like from being contaminated, and may be any non-permeable material, such as polyethylene resin. A synthetic resin sheet such as a polypropylene resin, a nylon resin, and a polyester resin may be used.
[0014]
The excrement absorbing sheet body used in the present invention comprises the above water-absorbent top sheet and a water-impermeable back sheet, and the top sheet is formed from a water-permeable sheet and a water-absorbent mat laminated on the back surface thereof. In this case, the back sheet is laminated on the water absorbing mat side.
[0015]
Any laminating method may be adopted as the laminating method of these sheets, for example, a method of bonding with an adhesive or a pressure-sensitive adhesive such as a rubber-based, acrylic-based, urethane-based, or silicone-based, an ethylene-vinyl acetate copolymer And a method of bonding with a hot-melt type adhesive such as a linear low-density polyethylene resin, and a method of sewing with a sewing machine or the like.
[0016]
The shape-retaining sheet used in the present invention is a sheet that can hold the bent shape when it is bent, and the bent portion formed by bending is held by the shape-retaining sheet to stand upright. Is done.
[0017]
The shape-retaining sheet is preferably lightweight and can be incinerated together with excrement of pets, and is preferably a stretched olefin-based resin sheet having a draw ratio of 10 to 40 times. Is bent at a substantially right angle to the stretching direction, thereby maintaining the bent shape.
[0018]
As the olefin resin constituting the stretched olefin resin sheet, any olefin resin having a film forming ability can be used, for example, high density polyethylene resin, medium density polyethylene resin, low density polyethylene resin, linear low density Polyethylene resin, polypropylene resin, ethylene-propylene copolymer, ethylene-pentene-1 copolymer, ethylene-vinyl acetate copolymer, ethylene- (meth) acrylate copolymer, ethylene-vinyl chloride copolymer, Examples include an ethylene-propylene-butene copolymer, and a high-density polyethylene resin is suitably used.
[0019]
The stretched olefin-based resin sheet is highly stretched 10 to 40 times, and preferably has high mechanical strength such as tensile strength and elastic modulus. 0.94 g / cm ³ or more is preferable because the strength is not improved.
[0020]
Also, the weight average molecular weight of the high-density polyethylene resin is too small, the mechanical strength is not so much improved even when stretched, and if too large, it is difficult to form or stretch the film, so that it is preferably 200,000 to 500,000. The melt index (MI) is preferably from 0.1 to 20, and more preferably from 0.2 to 10, which is excellent in film formability.
[0021]
The stretched olefin-based resin sheet is highly stretched 10 to 40 times. When the stretching ratio is small, the mechanical strength is not improved, and when the stretching ratio is large, the film tends to be torn laterally.
[0022]
As the stretching method of the olefin-based resin sheet, any conventionally known method may be adopted, but since the stretching is performed at a high degree of 10 to 40 times, after the olefin-based resin sheet is rolled, stretching or stretching is repeated a plurality of times. Multi-stage stretching is preferred.
[0023]
The above-mentioned rolling is a method in which an olefin-based resin sheet is supplied to a pair of rolls rotating in opposite directions and pressed to reduce the thickness of the sheet and elongate it. Unlike a stretched sheet, a rolled sheet is an olefin-based resin sheet. Since the resin is dense without being oriented, it is highly easily stretched.
[0024]
Rolling temperature is not uniformly rolled when it is low, melt cutting when it is high, the roll temperature at the time of rolling, the range of the melting point of the olefin resin of the olefin resin sheet to be rolled `` melting point -40 ℃ '' ~ melting point is preferable More preferably, the melting point of the olefin resin is from "melting point -30 ° C" to "melting point -5 ° C".
[0025]
In the present invention, the melting point refers to a maximum point of an endothermic peak accompanying melting of a crystal, which is observed when a thermal analysis is performed by a differential scanning calorimeter (DSC).
[0026]
Further, when the rolling ratio is small, a burden is imposed on the subsequent stretching, and when the rolling ratio is increased, the rolling becomes difficult. In the present invention, the rolling ratio and the stretching ratio are values obtained by reducing the sectional area of the sheet before rolling or stretching by the sectional area of the sheet after rolling or stretching.
[0027]
The stretching may be performed by any conventionally known method, for example, a method of stretching by heating with a heater or hot air by a roll stretching method or a zone stretching method.
[0028]
When the stretching temperature is low, uniform stretching cannot be performed, and when the stretching temperature is high, the sheet is melted and cut.Therefore, the olefin resin of the olefin resin sheet to be stretched preferably has a melting point of -60 ° C to a melting point, more preferably olefin. It is "melting point -50 degreeC"-"melting point -5 degreeC" of system resin.
[0029]
In addition, the stretching ratio may be determined so that the overall stretching ratio falls within this range in consideration of the rolling ratio, since the overall stretching ratio is 10 to 40 times. Is not improved, and is preferably at least twice, more preferably at least three times. The overall stretching ratio is a value obtained by multiplying the rolling ratio and the stretching ratio.
[0030]
The stretched olefin-based resin sheet has a decreased mechanical strength when it is thinner, and is more likely to be cracked in the stretching direction when it is thicker, so that its thickness is generally 0.05 to 1 mm, preferably 0.1 to 0.5 mm. .
[0031]
The excrement absorbing sheet of the present invention has a shape retaining sheet laminated on at least one surface of the excrement absorbing sheet main body, but may be laminated on both surfaces of the excrement absorbing sheet main body. When the shape-retaining sheet is laminated only on one surface of the excrement-absorbing sheet main body, the shape-retaining sheet is folded so as to be held so that the bent portion is erected. It is preferable to be laminated.
[0032]
In addition, since the shape-retaining sheet is folded so that the bent part is held upright, the shape-retaining sheet is integrally laminated from the end of the excrement absorbing sheet body to the inside of the part to be bent. It is preferred that
[0033]
The shape-retaining sheet may be laminated on the entire surface of the excrement absorbing sheet body, or a plurality of shape-retaining sheets cut into an appropriate shape such as a square or a rectangle may be partially laminated. In addition, a plurality of shape-retaining sheets cut in a rectangular shape in the center direction from each side of the substantially rectangular excrement absorbing sheet body are laminated, or a rectangular shape is cut in the center direction from the periphery of the substantially circular excrement absorbing sheet body. When a plurality of shape-retaining sheets are laminated, a dish-shaped excrement absorbing sheet can be formed by folding the shape-retaining sheet to form a bent portion.
[0034]
When the shape-retaining sheet is a stretched olefin-based resin sheet, it is preferably laminated on the back sheet with a hot-melt-based adhesive capable of bonding at a temperature not higher than the temperature at which the stretched olefin-based resin sheet shrinks.
[0035]
When bonding with the hot-melt adhesive, the hot-melt adhesive may be melted and bonded while applying, or a hot-melt adhesive sheet may be laminated and bonded while heating and pressing. When the heating temperature is increased, the stretched olefin-based resin sheet shrinks. Therefore, the temperature at which the stretched olefin-based resin sheet does not substantially thermally shrink, that is, the “melting point” of the thermoplastic resin constituting the stretched thermoplastic resin sheet It is preferable that the adhesive be applied at a temperature of -10 ° C or lower.
[0036]
When the excrement absorbing sheet of the present invention is rectangular, a non-permeable flap may be provided on one side of the excrement absorbing sheet body. If a lock such as an adhesive sheet is installed at the end of the flap, the flap can be fixed to a wall or the like with this lock, and the excrement absorbing sheet must be fixed in front of the wall. Can be.
[0037]
Further, if a non-permeable flap is extended on one side of the excrement absorbing sheet body and a shape-retaining sheet is laminated on the other three sides, a dish-shaped excrement absorbing sheet can be fixed in front of the wall surface. Can be installed. In these cases, the flap is preferably provided by extending the back sheet. Further, by laminating a shape-retaining sheet on the flap portion and standing the flap portion, it is possible to prevent urine and the like from scattering.
[0038]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing an example of the excrement absorbing sheet of the present invention, and FIG. 2 is a sectional view taken along line AA in FIG.
[0039]
In the figure, 2 is a water-permeable sheet made of a polyethylene resin fiber nonwoven fabric having a length of 80 cm, a width of 75 cm, and a thickness of 30 μm, and 3 is formed by dispersing a highly water-absorbent resin of polyacrylic acid resin into pulp and forming the sheet. A water-absorbing mat having a length of 50 cm, a width of 60 cm and a thickness of 1 cm, and a topsheet 1 is formed by laminating a water-permeable sheet 2 and a water-absorbing mat 3.
[0040]
4 is a non-water-permeable back sheet made of a stretched polypropylene resin film having a length of 80 cm, a width of 95 cm, and a thickness of 30 μm. The water-permeable sheet is formed by an ethylene-vinyl acetate hot melt adhesive via a water-absorbing mat 3. 2, the excrement absorbing sheet main body is formed.
[0041]
The water-permeable sheet 2 is laminated from the right end in the drawing of the back sheet 4, and the water-absorbing mat 3 is laminated at a distance of 15 cm from the right end and the upper and lower ends in the drawing of the back sheet 4, and the left end of the back sheet 4 A flap 6 is formed in the portion. Further, double-sided adhesive tapes 7 are attached to the flap 6 so that the flap 6 can be fixed to a wall surface or the like.
[0042]
In the figure, 5 ·· is a shape maintaining sheet made of a stretched polyethylene resin sheet. The production method and the lamination method of the stretched polyethylene resin sheet are as follows.
[0043]
A high-density polyethylene resin (manufactured by Nippon Polychem) having a weight average molecular weight (Mw) of 3.3 × 10 ⁵ and a melting point of 135 ° C. was supplied to a co-axial twin-screw kneading extruder (manufactured by Plastics Engineering Laboratory) to obtain a resin temperature of 200. After melt-kneading at a temperature of 0 ° C, the melt-kneaded product was formed into a sheet having a width of 34 cm and a thickness of 5.0 mm by a calendering machine controlled at a roll temperature of 110 ° C to obtain a polyethylene resin sheet.
[0044]
The obtained polyethylene resin sheet was rolled to a rolling ratio of 9.4 times using a rolling molding machine (manufactured by Sekisui Koki Seisakusho) heated to 120 ° C. to obtain a rolled sheet having a width of 34 cm and a thickness of 530 μm.
[0045]
The obtained rolled sheet was subjected to multi-stage stretching of 3.0 times by a hot air heating type multi-stage stretching device (manufactured by Kyowa Engineering) heated to 110 ° C., and the total stretching ratio was 28.2 times, the width was 20 cm, and the thickness was 300 μm. To obtain a stretched polyethylene resin sheet.
[0046]
A linear low-density polyethylene resin sheet (manufactured by Sekisui Film Co., Ltd.) having a melting point of 120 ° C., a width of 20 cm and a thickness of 30 μm was placed on one side of a stretched polyethylene resin sheet obtained using a film fusing apparatus (manufactured by Konan Sekkei Kogyo) The sheet was thermally fused (sheet temperature: 125 ° C.) with a heating roll at a temperature of 300 ° C. to obtain a laminated sheet having a thickness of 330 μm.
[0047]
The obtained laminated sheet is cut into a length of 20 cm and a width of 10 cm, and the ends in the length direction are aligned with the ends of the back sheet 4. Was placed so as to face the flap 6 direction, and was heat-sealed with a press machine at 120 ° C. and 5.0 kg / cm ² .
[0048]
In the pet sheet of the present invention shown in FIG. 1, when the shape-retaining sheet 5 is bent, a bent portion outside the bent portion of the excrement absorbing sheet main body is erected, and the excrement such as pets is removed. Scattering is prevented.
[0049]
【The invention's effect】
The configuration of the excrement absorbing sheet according to claim 1 is as described above, and the bent portion can be erected by bending the shape holding sheet, so that it is possible to prevent the urine of the pet from scattering. In particular, since any place around the excrement absorbing sheet or the entire surroundings can be erected, the urine of the pet can be prevented from scattering even in a place without a wall, and excretion of the pet at any place in the room It can be used as an excrement absorbing sheet for absorbing matter.
[0050]
In the excrement absorbing sheet according to the third aspect, since the shape maintaining sheet is also made of a stretched olefin resin sheet, it is lightweight and easy to handle, and can be incinerated when abandoned. Furthermore, it can be folded compactly before and after use, so that it can be easily transported and carried.
[Brief description of the drawings]
FIG. 1 is a plan view showing an example of the excrement absorbing sheet of the present invention.
FIG. 2 is a sectional view taken along the line AA in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Top sheet 2 Water permeable sheet 3 Water absorption mat 4 Back sheet 5 Shape maintenance sheet 6 Flap 7 Double-sided adhesive tape

Claims (4)

A shape-retaining sheet is laminated on at least one surface of the excrement-absorbing sheet body composed of a water-absorbing top sheet and a water-impermeable back sheet, and a bent portion is erected by bending the shape-retaining sheet. An excrement absorbing sheet characterized by being made in. The excrement absorbing sheet according to claim 1, wherein the shape maintaining sheet is integrally laminated from an end portion of the excrement absorbing sheet main body to an inner side thereof. The shape-retaining sheet is a stretched olefin-based resin sheet having a draw ratio of 10 to 40 times, and is laminated so that a stretching direction and a bending direction of the stretched olefin-based resin sheet are substantially perpendicular to each other. 3. The excrement absorbing sheet according to 1 or 2. The excrement absorbing sheet according to claim 3, wherein the stretched olefin resin sheet is laminated on the back sheet with a hot melt adhesive.

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