JP2008174279A - Breathable packaging bag, method for producing the same, and method for producing an exhaustable contents-filled package - Google Patents

Abstract

An object of the present invention is to make it possible to easily remove excess air from a packaging bag after filling the packaging bag with contents that need to be evacuated and to ensure the quality of the contents.
SOLUTION: A breathable packaging bag 10 whose peripheral edge 4 is sealed and filled with contents that need to be exhausted, wherein at least one of the base materials forming the packaging bag 10 is a breathable film or a non-woven fabric. An interior material 1 that can be sealed on both sides is laminated in contact with a sealable surface of an exterior material 2 that can be sealed on at least one side made of a water-impermeable film, and part of the unsealed portion 5 for ventilation A breathable packaging bag 10 in which the periphery of the interior material 1 and the exterior material 2 is sealed leaving
[Selection] Figure 1

Description

  The present invention relates to a breathable packaging bag filled with contents that need to be exhausted, a method for manufacturing the same, and a method for manufacturing a content-filled package that can be exhausted.

  Since a large amount of air is entrained in powder and granular materials such as powders and granules, it is desired that excess air be quickly exhausted after being formed into a filled package. For example, if the contents are rice, the packaging bags for powders that have been distributed in the past are cheap tube products made of polyethylene single-layer film, or laminates of nylon and aluminum-deposited nylon that are dry-laminated with polyethylene. A bag made of For high-grade products, bags made of a laminate obtained by dry laminating Japanese paper or synthetic fiber with polyethylene are also used.

  The rice bag of any configuration is a special seal having an unsealed portion for air venting in the vertical seal portion or the horizontal seal portion of the bag in order to release air immediately after filling. For this reason, when a rice bag is dropped, the problem of breaking the bag from the special seal portion is constantly occurring. In some cases, water and insects may invade from the special seals, leading to early deterioration of rice quality.

Moreover, as an example of the packaging bag for filling powders, such as wheat flour, in patent document 1, an interior film and an exterior film are overlap | superposed and a bag is comprised doublely, and the longitudinal direction of a bag is carried out to an interior film Needles which are appropriately dispersed near the both ends along the edge and penetrate the needles, and the exterior film is provided with a small hole at a position about 20 to 100 mm away from the position of the small holes of the interior film It is described that by providing a fine hole through which a finer needle penetrates, powder can be prevented from being ejected when deaerated through the small hole and the fine hole. However, if a hole is provided on the front side of the bag, there is a possibility that the fine hole will be conspicuous due to overlap with printing. If a hole is provided on the back side of the bag, the fine hole will contact the ground when the bag is stacked in multiple stages. There is a risk of water intrusion.
In addition, microwave foods that are heated in a microwave oven are well known as those that require the gas inside the package to be exhausted after the contents are filled into a filled package. As a packaging bag for microwave oven foods, there is known a structure with a weak seal so that one side of the packaging bag can be peeled and exhausted when internal pressure is applied, but the internal pressure when peeling is constant. In other words, there was a problem that the peeling did not occur reliably at a predetermined pressure. Moreover, although the thing which made a part of packaging bag the nonwoven fabric is known, since the nonwoven fabric surface is exposed, when it contacts with water, water will invade and it is not hygienic. In order to improve this point, Patent Document 2 proposes a nonwoven fabric covered with a wrapping sheet, but there is a problem that the nonwoven fabric cannot be easily and reliably exposed during use.
Japanese Utility Model Publication No. 54-26513 Japanese Utility Model Publication No. 5-13953

  The present invention has been made in view of the above circumstances, and it is possible to easily and quickly remove excess air and water vapor generated when heating in a microwave oven after filling, and to ensure the quality of the contents. It is an object of the present invention to provide a packaging bag, a method for producing the packaging bag, and a method for producing an exhaustable contents-filled package.

In order to solve the above-mentioned problem, the invention according to claim 1 of the present invention is a breathable packaging bag having a sealed periphery and filled with contents that need to be exhausted, and a base material forming the packaging bag At least one of the interior materials is made of an interior material made of a breathable film or non-woven fabric that can be sealed on both sides, and is laminated in contact with a sealable surface of an exterior material made of at least one surface made of an impermeable film. The breathable packaging bag is characterized in that a peripheral edge between the interior material and the exterior material is sealed while leaving an unsealed portion for ventilation in the portion.
In the invention according to claim 2 of the present invention, the packaging bag is sealed so that the interior material and the exterior material are sealed at two upper and lower ends and the transverse seal portion. A pillow packaging bag or a three-sided seal bag having a vertical seal portion at one location, wherein the vertical seal portion has an unsealed portion for ventilation formed between the interior material and the exterior material. The breathable packaging bag according to claim 1.
Invention of Claim 3 of this invention is a breathable packaging bag of Claim 1 or 2 which has a printing layer between the said exterior material and the said interior material.

The invention according to claim 4 of the present invention is a long packaging material that forms a packaging bag in which the periphery is sealed and the contents that need to be exhausted are filled and stored, and the packaging material is a breathable film or A long interior material made of non-woven fabric that can be sealed on both sides is overlapped in contact with a sealable surface of a long exterior material that can be sealed on at least one surface made of a water-impermeable film, and is partially sealed Is a breathable packaging material characterized by
The invention according to claim 5 of the present invention is the breathable packaging material according to claim 4, wherein both ends in the flow direction of the packaging material are left as free ends.

The invention according to claim 6 of the present invention is a method of manufacturing a filled package in which a packaging bag is made by a vertical pillow bag filling machine and the inside of the packaging bag is filled with contents that require exhaust. A long interior material made of a breathable film or non-woven fabric that can be sealed on both sides and a long exterior material made of a water-impermeable film that can be sealed on at least one surface, A solid seal only to obtain a cylinder, and the solid-sealed portion and / or the interior material and the exterior material in the vicinity thereof are partially sealed so that an unsealed portion for ventilation remains in part. A step of forming a vertical seal portion, a step of filling the inside of the cylindrical body, a horizontal seal portion intersecting the vertical seal portion by solid-sealing the interior materials and the interior materials and the exterior material And forming a process A method of manufacturing an evacuable content filling packaging body, wherein.
In the invention according to claim 7 of the present invention, instead of stacking the interior material and the exterior material, a long interior material made of a breathable film or a non-woven fabric that can be sealed on both sides is made of an impermeable film. A packaging material in which at least one side is overlapped in contact with a sealable surface of a long sealable outer packaging material and partially sealed leaving both side ends in the flow direction as free ends is used. Item 7. A method for producing an exhaustable contents-filled package according to Item 6.

The invention according to claim 8 of the present invention is a bag making method for producing a breathable packaging bag in which the peripheries of a plurality of substrates are sealed and filled with contents that need to be exhausted. A single base material comprising a long interior material made of a film or a nonwoven fabric that can be sealed on both sides, and an exterior material made of a long impermeable film that can be sealed on at least one surface of the interior material. And solid-sealing only the interior material of one base material and the other long base material that can be sealed at least on one side in the width direction with a predetermined interval along the flow direction. And a step of partially sealing the width direction solid seal portion and / or the interior material and the exterior material in the vicinity thereof, partially leaving an unsealed portion for ventilation. With the manufacturing method of the breathable packaging bag featuring That.
The invention according to claim 9 of the present invention is a bag making method for producing a breathable packaging bag in which the peripheries of a plurality of substrates are sealed and filled with contents that need to be exhausted. A single base material comprising a long interior material made of a film or a nonwoven fabric that can be sealed on both sides, and an exterior material made of a long impermeable film that can be sealed on at least one surface of the interior material. And solid-sealing only the interior material at one side end or both side ends of the flow direction and another long base material capable of sealing at least one side to form a solid seal portion at the side end; and A step of partially sealing the solid seal part and / or the interior material and the exterior material in the vicinity thereof, leaving a part of the unsealed part for ventilation in part,
It is a manufacturing method of the air permeable packaging bag characterized by having.
The invention according to claim 10 of the present invention is a bag making method for producing a breathable packaging bag in which the peripheries of a plurality of substrates are sealed and filled with contents that need to be exhausted. A single base material comprising a long interior material made of a film or a nonwoven fabric that can be sealed on both sides, and an exterior material made of a long impermeable film that can be sealed on at least one surface of the interior material. And forming a plurality of solid seal portions in the width direction by solid-sealing only the interior material and other long base material capable of sealing at least one side in the width direction with a predetermined spacing therebetween in the width direction; A step of solid-sealing only the interior material at one side end or both side ends of the flow direction and the other base material to form a solid seal portion at the side end, a solid seal portion at the width direction, and a solid seal portion at the side end And / or near them Said interior material of said other substrate, a method for producing a breathable packaging bag, characterized in that and a step of partially sealed leaving unsealed portions of the vent part.
The invention according to claim 11 of the present invention is such that the other base material is a long interior material made of a breathable film or a nonwoven fabric that can be sealed on both sides, and is laminated on the interior material so as to be sealable, at least one surface being sealed It consists of a possible long impermeable film, The manufacturing method of the air permeable packaging bag in any one of Claims 8 thru | or 10 characterized by the above-mentioned.
The invention according to claim 12 of the present invention is such that a long interior material made of a breathable film or a non-woven fabric that can be sealed on both sides is a long exterior material made of a water-impermeable film and that can be sealed on at least one surface. The method for producing a breathable packaging bag according to any one of claims 8 to 11, wherein a packaging material that is overlapped and partially sealed in contact with a sealable surface is used.

  According to the breathable packaging bag of the present invention, excess air and vapor are easily removed through the interior material made of a breathable film or nonwoven fabric, and the unsealed portion for ventilation formed between the interior material and the exterior material. be able to. In addition, since the interior material is interposed between the unsealed portion for ventilation and the content filled in the filling storage portion, and the interior materials around the entire circumference of the filling storage portion are solid-sealed, the unsealed ventilation portion It is possible to prevent the contents from leaking through the section and water and insects from entering.

The present invention will be described below with reference to the drawings based on the best mode.
As shown in FIG. 1, the breathable packaging bag 10 of the present invention is a breathable packaging bag 10 in which the periphery 4 is sealed and the contents are filled and stored, and forms the packaging bag 10. At least one of the base materials is laminated in contact with the sealable surface of the exterior material 2 made of a water-impermeable film and the interior material 1 made of a breathable film or non-woven fabric that can be sealed on both sides. Thus, the periphery of the interior material 1 and the exterior material 2 is sealed while leaving the unsealed portion 5 for ventilation in part.

  In the case of this embodiment, the packaging bag 10 is sealed so that the interior material 1 and the exterior material 2 intersect each other between the two horizontal seal portions 12 and 12 where the upper and lower ends are sealed, and the horizontal seal portion 12. A pillow packaging bag having a back-sealed seal portion 11 (vertical seal portion). Moreover, since the base material which forms the packaging bag 10 is formed by folding a single base material, both the front and back base materials have an interior material 1 that can be sealed on both sides made of a breathable film or a nonwoven fabric. At least one surface made of a water-impermeable film is stacked in contact with the sealable surface of the sealable exterior material 2, and the interior material 1 and the exterior material 2 are partially left with a non-sealed portion 5 for ventilation. The periphery is sealed. And as shown in FIG.1 (c), the interior material 1 and the exterior material 2 are made into the substantially the same width | variety, and the interior material 1 and the exterior material 2 are the both ends of the width direction in the back | pasting sticker part 11. Are sealed together.

  The interior material 1 is made of a breathable film or non-woven fabric and can be sealed on both sides. Here, as an air permeable film, as shown, for example in FIG.1 (b) and (c), the film which has the ventilation hole 6 is mentioned. A net-like film may also be used. The material of the breathable film is provided with a sealing layer made of a thermoplastic plastic that can be sealed by heat sealing or ultrasonic sealing on both surfaces. There is no particular limitation as long as the sealing layer is provided on both sides, and it may be a single layer film or a laminated film. In the case of a laminated film, the front and back sealing characteristics may be different. However, since this air-permeable film only restricts the outflow of contents such as powder particles, a single-layer film advantageous in terms of cost is preferable. Specifically, a linear low-density polyethylene (LLDPE) film or no A stretched polypropylene (CPP) film is mentioned. The ventilation hole 6 can be a hole that is perforated by a hot needle, a cold needle, a punch blade type, or the like. The size of the air holes 6 can be appropriately selected according to the required exhaust performance in consideration of the density of the holes. When the content is a granular material, it is preferable that the size of the granular material does not pass because the periphery of the packaging bag filled with the granular material is not soiled with the granular material, The magnitude | size of the grade which a granular material passes may be sufficient. In this case, when the air is extracted immediately after filling, the granular material comes out mixed with the air, but the outflow path of the air passes through the gap 7 between the interior material 1 and the exterior material 2 after hitting the exterior material 2, Since it is discharged from the unsealed portion 5 for ventilation, most of the granular material in the air to be deaerated remains in the gap 7 and the amount of the granular material that comes out is extremely small. When the size is such that the granular material does not pass through, the hole diameter of the air hole 6 is about half of the short diameter of the granular material so that the granular material does not pass through the air hole 6 even if the interior material 1 is deformed. It is preferable that it is less than that.

The material of the breathable film may be a nonwoven fabric. The nonwoven fabric is preferably thin and highly breathable, preferably a nonwoven fabric made by a spunbond method or a meltblown method, and the material thereof is low density polyethylene, linear low density polyethylene, polypropylene, polyethylene-vinyl acetate, etc. A single substance or two or more kinds are blended or have a sheath structure. The nonwoven fabric preferably has an air permeability of 5 seconds or less according to JIS P8117 Gurley measurement method. Since the exterior material 2 is adjacent, it may be thin and low in physical strength.
Moreover, when using this invention as a packaging bag of a microwave foodstuff, the nonwoven fabric which has a filter function frequently used for autoclave sterilization, ethylene oxide gas sterilization, etc. which pass water vapor | steam but does not let bacteria pass is preferable.

  The exterior material 2 is a film made of an impermeable film and capable of sealing at least one surface. The interior material 1 is stacked in contact with the sealable surface of the exterior material 2. As the exterior material 2, for example, a single layer film or a resin layer of polyolefin such as polyethylene, LLDPE, CPP, or a stretched film such as a biaxially stretched nylon film, a biaxially stretched polyester film, or a biaxially stretched polypropylene (OPP) film. And a laminated film in which an ethylene-vinyl acetate copolymer or metal foil, Japanese paper, synthetic fiber paper or the like is laminated. A laminated film is preferable from the viewpoint of strength and quality maintaining performance of contents. Moreover, the exterior material 2 can have a printing layer. The printed layer may be the front surface or the back surface of the exterior material 2, and when the exterior material 2 is a laminated film, it can be provided as an intermediate layer. When provided on the surface, it is preferable to prevent the printed layer from falling off with OP varnish or the like. In particular, when the outer packaging material 2 is a laminated film of a transparent stretched film, the printed film is printed on the back and the polyolefin seal layer or other film and the seal layer are laminated, and the printed layer may fall off. Absent. Moreover, when the exterior material 2 is a transparent polyolefin single layer film, it looks good just by printing on the single layer film, and the printed layer does not fall off. This is because in this case, the interior material 1 functions as a protective layer for the print layer, and the print layer is not rubbed in the horizontal direction. In this case, the interior material 1 may be printed on the surface. Also at this time, the printing layer is protected by the exterior material 2. The printing layer can be formed by gravure printing, offset printing, flexographic printing, or the like. When the surface of the exterior material 2 on which the printed layer is provided is a synthetic resin layer, gravure printing is beautiful and preferable. The printed layer may include characters and patterns representing the name and type of the packaged product, and may include a bag-making control mark when bag-making is performed from a long base material.

  In the back-sealed seal portion 11 and the lateral seal portion 12, the interior materials 1, 1 are solid-sealed, and thereby the interior materials 1, 1 around the entire circumference of the filling storage portion 3 provided between the interior materials 1, 1. They are sealed so that the contents (not shown) are not leaked. The solid seal is a seal that is provided over the entire length in the extending direction of the seal portion and within a predetermined width in the width direction perpendicular to the extending direction of the seal portion.

  In the lateral seal portions 12 and 12, the interior materials 1, 1 and the interior material 1 and the exterior material 2 are solid-sealed. Further, a gap 7 is formed in the filling and storing unit 3. This gap 7 becomes a passage for air during deaeration. Therefore, excess air remaining in the filling and storing unit 3 after the packaging bag 10 is filled and packaged, for example, when the packaging bag 10 is compressed by stacking or the like, passes through the interior material 1 having air permeability and the exterior material 1. 2 is exhausted from the unsealed portion 5 for ventilation. The gap 7 may be partially sealed also in the filling and storing unit 3 as long as air passes.

  Further, in the breathable packaging bag 10 of this embodiment, an unsealed portion 5 for ventilation is formed between the interior material 1 and the exterior material 2 of the back-attached seal portion 11. Here, the unsealable portion 5 for ventilation may be formed so as to pass through the inside and outside of the packaging bag 10 in the width direction of the back-sealed seal portion 11. For example, as shown in FIG. 2, the unsealed portion 5 for ventilation includes (a) a shape having a passage that linearly crosses the seal portion, and (b) a shape having a passage that crosses the seal portion in a broken line shape or a curved shape. (C) A shape in which a plurality of point-like seal portions are gathered and a lattice-shaped passage is formed between the seal portions. The vertical direction in FIG. 2 is a direction in which the inside and outside of the packaging bag 10 communicate with each other through the seal portion of the peripheral edge 4, and the hatching represents a portion where a seal is applied between the interior material 1 and the exterior material 2. .

  Therefore, excess air present in the gap 7 between the interior material 1 and the exterior material 2 can be easily discharged out of the packaging bag 10 through the unsealed portion 5 for ventilation. Further, since the interior material 1 is interposed between the filling storage part 3 and the unsealed part 5 for ventilation, the contents leak through the unsealed part 5 for ventilation or water or insects enter. Can be prevented. These unsealed portions 5 may be provided obliquely or in a curved shape.

In the back-sealed seal portion 11, the gap 7 between the interior material 1 and the exterior material 2 is partially sealed at the periphery of the interior material 1 and the exterior material 2, leaving an unsealed portion 5 for ventilation in part. The Since this partial seal is solid-sealed between the interior materials 1 and 1, the function of closing the contents is not regarded as important. Therefore, the position to be provided does not necessarily include the end edge of the back-sealed seal portion 11, but if the end edge is not included, the space between the interior material 1 and the exterior material 2 becomes a free end, and insects and water enter from here. Since it becomes easy, it is preferable to include the edge of the back sticking seal | sticker part 11 or to provide as close as possible. In addition, when the seal width of the solid seal portion between the interior materials 1 and 1 is narrow, the solid seal portion is not necessarily included, but in addition to the space between the interior material 1 and the exterior material 2 being a free end, When this partial seal is formed, the interior materials 1 and 1 are also partially sealed. As a result, it contributes to the reinforcement of the solid seal portion. Therefore, it is preferable that the solid seal portion is included or provided as close as possible.
Furthermore, even when a display or design is applied to the packaging bag 10 with a printed layer, the unsealed portion 5 for ventilation is provided on the back-sealed seal portion 11 of the packaging bag 10, so that it does not overlap with printing.

  The above-described pillow packaging bag 10 can be continuously formed and filled using a vertical pillow bag filling machine or a horizontal pillow bag filling machine. When filling the granular material during bag making, a vertical pillow bag filling machine is more preferable.

In order to manufacture the pillow packaging bag 10 using the vertical pillow bag filling machine, first, the long interior material 1 and the long exterior material 2 are overlapped and guided to a guide member such as a sailor, Round to shape. Then, using a commonly used stick-shaped or roll-shaped sealing member, only the interior materials 1 and 1 are solid-sealed while turning a part of the exterior material 2 at both ends in the flow direction so that the exterior material 2 is not sandwiched. A cylinder can be obtained. Next, for example, when the solid seal portion and / or the interior material 1 and the exterior material 2 in the vicinity thereof are sealed using a rod-like or roll-like seal member having a groove cut at a predetermined interval, the groove portion is used for ventilation. The remaining unsealed portion 5 is obtained as a partial seal portion. Thereby, a vertical seal part can be formed while forming the unsealed part 5 for ventilation between the interior material 1 and the exterior material 2 of the back-sealed seal part 11.
In addition, in the position where this partial seal part remove | deviated from the solid seal part of interior material 1, 1, interior material 1, 1 is newly sealed partially. This new partial seal reinforces the solid seal portion when the seal strength is low. Therefore, if the width of the interior material 1 is slightly larger than the width of the exterior material 2, for example, about 15 mm, rounded into a cylindrical shape, and the interior materials 1 and 1 are solid-sealed with a width of about 5 mm, the exterior material A solid seal portion can be formed even if 2 is not blurred. Then, if the interior material 1 and the exterior material 2 are partially sealed including the solid seal portion with a width of about 15 mm, the interior materials 1 and 1 are newly partially sealed with a width of about 10 mm. As a result, since the interior materials 1 and 1 and the interior materials 1 and 2 are partially sealed with a width of about 7 mm, the solid seal portion is sufficiently reinforced.

Here, instead of stacking the interior material 1 and the exterior material 2, the long interior material 1 made of a breathable film or a non-woven fabric that can be sealed on both sides can be sealed on at least one surface made of a water-impermeable film. It is also possible to use a packaging material that is stacked in contact with the sealable surface of the exterior material 2 and partially sealed, and that leaves both side ends in the flow direction as free ends. Also in this case, since both ends in the flow direction of the packaging material are left as free ends, while turning part of the exterior material on both ends in the flow direction, solid seal only the interior materials to obtain a cylinder, By partially sealing the interior material 1 and the exterior material 2, the unsealed portion 5 for ventilation can be formed between the interior material 1 and the exterior material 2 of the back-bonded seal portion 11. In this packaging material, the interior material 1 is previously bonded to the exterior material 2 with a partial seal, so that it is not necessary to provide two packaging material supply devices for the vertical pillow bag filling machine.
Further, as described above, the width of the interior material 1 is made slightly wider than the width of the exterior material 2, and the interior material 1 and the exterior material 2 at both ends in the flow direction are partially at the periphery of the exterior material 2 or in the vicinity of the periphery. By sealing, a packaging material in which an unsealed portion 5 for ventilation is formed in advance between the interior material 1 and the exterior material 2 can be used. And if this packaging material is used, not only it is not necessary to provide two packaging material supply devices for a vertical pillow bag filling machine, but also a solid seal part can be formed without the exterior material 2 being blurred, Can be used without any modification to the vertical pillow bag filling machine.

  Further, after filling a predetermined amount of the contents inside the cylinder with the back-sealed seal, a lateral seal portion 12 intersecting with the back-sealed seal portion 11 is formed on the cylinder, and the filling port is sealed To do. When the lateral seal portion 12 is formed, the interior members 1 and 1 and the interior material 1 are brought into contact with the cylindrical body by bringing a heating member formed on the peripheral surface of the seal bar or the cylinder from the outside of the exterior material 2. And the exterior material 2 are solid-sealed.

The horizontal seal portion 12 serves as both the sealing portion of the lower packaging bag and the bottom portion of the upper packaging bag. When the contents are filled in the cylindrical molded body, the lower packaging bag is first placed. It fills on the horizontal seal part 12 formed after filling a bag. The sealing portion of the lower packaging bag and the bottom portion of the upper packaging bag are cut along the longitudinal direction of the lateral seal portion 12 to cut the intermediate portion of the lateral seal portion 12 so as to cross the cylindrical molded body. Can be separated.
The pillow packaging bag 10 of this embodiment can be manufactured through the above steps.
A three-side sealed bag filled with the contents can be manufactured by filling the bag in the same manner so that the position where the vertical seal is formed becomes the side seal portion of the packaging bag.

  3 and 4 are cross-sectional views showing an example of a packaging bag made by sealing the periphery of a plurality of substrates. In the breathable packaging bag 20 shown in FIG. 3, the two base materials that form the filling and storing part 3 of the packaging bag are both impermeable to the interior material 1 made of a breathable film or a nonwoven fabric that can be sealed on both sides. At least one surface made of a film is stacked in contact with the sealable surface of the sealable exterior material 2, and a peripheral edge 4 between the interior material 1 and the exterior material 2 is left with a part of the unsealed portion 5 for ventilation remaining. It is sealed.

  Moreover, in this invention, an interior material can also be provided only in the one side of a filling storage part. FIG. 4 is a cross-sectional view showing an example of a packaging bag made by sealing the periphery of a plurality of substrates. One of the two base materials (one base material) that forms the filling / accommodating portion 3 of the breathable packaging bag 30 shown in FIG. 4 has the interior material 1 made of a breathable film or a non-woven fabric that can be sealed on both sides. In addition, at least one surface made of a water-impermeable film is stacked in contact with the sealable surface of the sealable exterior material 2, and the interior material 1 of one base material leaves an unsealed portion 5 for ventilation in part. The outer periphery 4 of the exterior material 2 and another base material is sealed. Further, in this embodiment, as the other base material, one made of only the exterior material 2 that can be sealed on at least one surface made of a water-impermeable film is used, and the exterior material 2 has one surface that can be sealed. Are stacked in contact with the interior material 1 of the base material.

  In order to manufacture such packaging bags 20 and 30, for example, as shown in FIGS. 3 and 4, one base material (interior material 1 and exterior material 2) and another base material (interior material 1 and exterior material 2). Or it is usually used on one side or two opposite sides, with the exterior material 2 only) having two pieces on the top and bottom, and the exterior material 2 and 2 are stacked so that the base material 1 or the interior material 1 of both base materials comes between them. Using a sealing member such as a seal bar, a part of the exterior material 2 at both ends in the flow direction is turned over so that the exterior material 2 of one base material or both base materials is not sandwiched. The material 1 and the exterior material 2 of the other base material are solid-sealed, and the solid seal portion and / or the interior material 1 and the exterior material 2 in the vicinity thereof are partially sealed leaving the unsealed portion 5 for ventilation. And the method of shape | molding in a bag shape so that the side of one side and another base material may become the filling storage part 3 is left leaving one side as an opening for filling, and sealing the remaining side.

  Further, the packaging bags 20 and 30 in which the peripheral edges of a plurality of substrates are sealed have a long interior material that can be sealed on both sides made of a breathable film or a nonwoven fabric, and at least one side made of a long impermeable film. The following (1) to (3) can be used as a method of manufacturing a single base material by stacking a sealable exterior material and a long other base material. Illustrated.

(1) The interior material 1 and the exterior material 2 are overlapped to form one base material, and the interior material 1 alone and the other base material are solid-sealed in the width direction with a predetermined distance apart along the flow direction. Forming the width direction solid seal portion and the width direction solid seal portion and / or the interior material 1 and the exterior material 2 in the vicinity thereof, partially leaving an unsealed portion 5 for ventilation. And a step of sealing. As a result, the seal portion in the width direction is solid-sealed between the interior material 1 and the other base material, and an unsealed portion 5 for ventilation is formed in a part between the interior material 1 and the exterior material 2. Can be. Here, the other base material is another set of base materials composed of the interior material 1 and the exterior material 2 in the case of the packaging bag 20 shown in FIG. 3, and in the case of the packaging bag 30 shown in FIG. This is the other exterior material 2 that cannot be overlapped with the material 1. Therefore, the solid seal with the other base material in the packaging bag 20 shown in FIG. 3 means that the interior materials 1 and 1 are solid sealed.
In the case of the bag-making method of (1), by further providing a step of sealing one end or both ends of the flow direction, a width direction seal portion spaced apart by a predetermined distance along the flow direction, and a flow direction A band of a packaging bag with three or four sides sealed with a seal portion along one side end or both side ends can be manufactured. In order to separate individual packaging bags from this band, in the case of pre-fabricated bags, the band of the packaging bag sealed on the three sides is left as it is, and the band of the packaging bag sealed on the four sides is slit at the center, with a predetermined interval. Cutting is performed in the middle of the spaced-apart seal portion in the width direction to realize one-sided or two-sided bag making. In the case of longitudinal bag making, individual packaging bags can be separated by cutting upstream or downstream of the seal portion in the width direction. And in the case of side-capture bag making, a step of sandwiching a folded film that becomes the bottom of the packaging bag into one side end or both side ends of the base material in the flow direction is provided upstream of the step of sealing one side end or both side ends in the flow direction. Accordingly, a standing pouch having a side seal portion provided with an unsealed portion for ventilation can be manufactured by one or two chamfering. In addition, in the case of longitudinal bag making, a step of sandwiching gusset folding films, which are both sides of the packaging bag, between both ends in the flow direction of the base material is provided upstream of the step of sealing one end or both ends in the flow direction. Thus, a gusset bag having a bottom seal portion provided with an unsealed portion for ventilation can be manufactured. In addition, these foldable films may consist only of the exterior material, or may be a laminate of the exterior material and the interior material.

(2) The interior material 1 and the exterior material 2 are overlapped to form one base material, and only the interior material 1 at one side end or both side ends in the flow direction and the other base material are solid-sealed, and the side-end solid seal is obtained. A step of forming a portion, and a step of partially sealing the solid seal portion at the side end and / or the interior material 1 and the exterior material 2 in the vicinity thereof, leaving part of the unsealed portion 5 for ventilation. Do. As a result, the seal portion at one or both ends in the flow direction is solid-sealed between the interior material 1 and the other base material, and a part for ventilation between the interior material 1 and the exterior material 2 is provided. The unsealed part 5 can be formed. Here, the other base material is another set of base materials composed of the interior material 1 and the exterior material 2 in the case of the packaging bag 20 shown in FIG. 3, and in the case of the packaging bag 30 shown in FIG. This is the other exterior material 2 that cannot be overlapped with the material 1. Therefore, the solid seal with the other base material in the packaging bag 20 shown in FIG. 3 means that the interior materials 1 and 1 are solid sealed.
In the case of the bag-making method of (2), further, by providing a step of sealing in the width direction spaced apart by a predetermined distance along the flow direction, a width direction seal portion spaced by a predetermined distance along the flow direction; A band of a packaging bag with three or four sides sealed with a seal portion along one side end or both side ends in the flow direction can be manufactured. In order to separate individual packaging bags from this band, in the case of pre-fabricated bags, the band of the packaging bag sealed on the three sides is left as it is, and the band of the packaging bag sealed on the four sides is slit at the center, with a predetermined interval. Cutting is performed in the middle of the spaced-apart seal portion in the width direction to realize one-sided or two-sided bag making. In the case of longitudinal bag making, individual packaging bags can be separated by cutting upstream or downstream of the seal portion in the width direction. And in the case of side-capture bag making, only the interior material 1 at one or both ends in the flow direction and the other base material are solid-sealed to form the bottom portion of the packaging bag upstream of the step of forming a solid-sealed portion at the side end. By providing a step of sandwiching the folded film between one side edge or both side edges in the flow direction of the base material, a standing pouch in which a bottom seal portion is provided with an unsealed portion for ventilation can be manufactured by one-sided or two-sided chamfering. it can. In addition, during vertical bag making, both sides of the packaging bag are upstream of the process of solid-sealing only the interior material 1 at one or both ends in the flow direction and the other base material to form a solid-sealed portion at the side end. By providing a step of sandwiching the gusset folding film between both ends of the base material in the flow direction, a gusset bag having a side seal portion provided with an unsealed portion for ventilation can be manufactured. In addition, these foldable films may consist only of the exterior material, or may be a laminate of the exterior material and the interior material.

(3) The interior material 1 and the exterior material 2 are overlapped to form one base material, and the interior material 1 alone and the other base material are solid-sealed in the width direction with a predetermined distance apart along the flow direction. Forming a solid seal portion in the width direction, forming a solid seal portion on the side end by solid-sealing only the interior material 1 on one side end or both side ends of the flow direction and the other base material, and the width A step of partially sealing the solid seal portion in the direction and the solid seal portion at the side end and / or the interior material and other base material in the vicinity thereof, leaving the unsealed portion 5 for ventilation in part. Do. Thereby, both the seal part in the width direction and the seal part on one side end or both side ends in the flow direction are solid-sealed between the interior material 1 and the other base material, and the interior material 1 and the exterior material 5 part of the unsealed portion for ventilation is formed in a part between the two. Here, the other base material is another set of base materials composed of the interior material 1 and the exterior material 2 in the case of the packaging bag 20 shown in FIG. 3, and in the case of the packaging bag 30 shown in FIG. This is the other exterior material 2 that cannot be overlapped with the material 1. Therefore, the solid seal with the other base material in the packaging bag 20 shown in FIG. 3 means that the interior materials 1 and 1 are solid sealed.
In the case of the bag making method of (3), a packaging bag in which three sides or four sides are sealed with a seal portion in the width direction spaced apart by a predetermined distance along the flow direction and a seal portion on one side end or both side ends in the flow direction. Can be manufactured. In order to separate individual packaging bags from this band, in the case of pre-fabricated bags, the band of the packaging bag sealed on the three sides is left as it is, and the band of the packaging bag sealed on the four sides is slit at the center, with a predetermined interval. Cutting is performed in the middle of the spaced-apart seal portion in the width direction to realize one-sided or two-sided bag making. In the case of longitudinal bag making, individual packaging bags can be separated by cutting upstream or downstream of the seal portion in the width direction. And in the case of side-capture bag making, only the interior material 1 at one or both ends in the flow direction and the other base material are solid-sealed to form the bottom portion of the packaging bag upstream of the step of forming a solid-sealed portion at the side end. By providing a step of sandwiching the folded film between one side edge or both side edges of the base material in the flow direction, the standing pouch in which the side seal part and the bottom seal part are provided with the unsealed part for ventilation can be taken on one or two sides. Can be manufactured. In addition, during vertical bag making, both sides of the packaging bag are upstream of the process of solid-sealing only the interior material 1 at one or both ends in the flow direction and the other base material to form a solid-sealed portion at the side end. By providing the step of sandwiching the gusset folded film between both ends of the base material in the flow direction, it is possible to manufacture a gusset bag in which a bottom seal portion and a side seal portion are provided with unsealed portions for ventilation. In addition, these foldable films may consist only of the exterior material, or may be a laminate of the exterior material and the interior material.

In the manufacturing methods of (1) to (3) above, when the interior material 1 and the exterior material 2 are overlapped, only the interior material 1 and another substrate are solid-sealed, To prevent the interior material 1 and the exterior material 2 from being solid-sealed by lowering the interior material 1 and the exterior material 2 and separating and inserting a sealing device therebetween. Can do. Alternatively, only the interior material 1 and another base material may be solid-sealed in advance, and the exterior material 2 may be stacked on the interior material 1.
Instead of overlapping the interior material 1 and the exterior material 2, a long packaging material that forms a packaging bag that is sealed at its periphery and filled with contents that need to be exhausted, A long interior material 1 made of a breathable film or a non-woven fabric that can be sealed on both sides is stacked in contact with a sealable surface of a long exterior material 2 that can be sealed on at least one surface made of a water-impermeable film. It is also possible to use a breathable packaging material partially sealed so as not to slip. In this packaging material, it is good also as what left the both ends of the flow direction of the packaging material as a free end.

  According to the breathable packaging bags 20 and 30 of this embodiment, since the interior material 1 has air permeability, excess air in the filling storage portion 3 is discharged into the outer gap 7 that separates the interior material 1, and It can be easily extracted outside the packaging bags 20 and 30 through the unsealed portion 5 for ventilation. Further, since the interior material 1 is interposed between the unsealed portion 5 for ventilation and the contents filled in the filling storage portion 3, the contents leak out through the unsealed portion 5 for ventilation, Water and insects can be prevented from entering.

  Further, even when the display or design is applied to the packaging bags 20 and 30 with the printed layer, the unsealed portion 5 for ventilation is provided at the seal portion of the peripheral edge 4 of the packaging bags 20 and 30, and thus overlaps with printing. There is nothing. Further, even when the packaging bags 20 and 30 are stacked in multiple stages, the ventilation unsealed portion 5 is exposed to the outside, so that the air permeability is not impaired. Further, there is no possibility that water or the like enters from the unsealed portion 5 for ventilation.

  INDUSTRIAL APPLICABILITY The present invention can be used for filling and packaging various types of granular materials. As the granular materials, grains such as rice and wheat, beans, feed, and these powders, resin pellets, chemicals, and other industrial products Etc. Moreover, this invention can be utilized for the microwave oven bag put on a microwave oven as it is.

BRIEF DESCRIPTION OF THE DRAWINGS It is drawing which shows one example of the air permeable packaging bag of this invention, (a) is a perspective view, (b) is a longitudinal cross-sectional view which follows an AA line, (c) is a cross section which follows a BB line. FIG. It is drawing which illustrates the unsealed part for ventilation | gas_flowing, (a) is a shape which has a channel | path which crosses a horizontal seal part linearly, (b) is a shape which has a channel | path which crosses a horizontal seal part in a polygonal line, (c ) Indicates a shape in which a lattice-shaped passage is formed between a plurality of point-like seal portions. It is a cross-sectional view which shows one example of a breathable packaging bag which has an interior material on both sides of a filling storage part. It is a cross-sectional view which shows one example of a breathable packaging bag which has an interior material on the one side of a filling storage part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Interior material, 2 ... Exterior material, 3 ... Filling storage part, 4 ... Periphery of interior material and exterior material, 5 ... Unsealed part for ventilation, 6 ... Ventilation hole, 7 ... Gap between interior material and exterior material DESCRIPTION OF SYMBOLS 10 ... Breathable packaging bag (pillow packaging bag), 11 ... Back sticking seal part (vertical seal part), 12 ... Horizontal seal part, 20 ... Breathable packaging bag which has interior material on both sides of a filling storage part, 30 ... A breathable packaging bag having an interior material on one side of the filling storage section.

Claims (12)

It is a breathable packaging bag whose periphery is sealed and filled with contents that need to be exhausted,
At least one of the base materials forming the packaging bag is a sealable surface of an exterior material made of a water-impermeable film and an interior material that can be sealed on both sides made of a breathable film or a nonwoven fabric. A breathable packaging bag which is stacked in contact with each other, and a peripheral edge between the interior material and the exterior material is sealed while leaving an unsealed portion for ventilation in part. The packaging bag includes a pillow package having two horizontal seal portions in which the interior material and the exterior material are sealed at both upper and lower ends, and one vertical seal portion sealed so as to intersect the horizontal seal portion. A bag or a three-sided seal bag,
2. The breathable packaging bag according to claim 1, wherein an unsealed portion for ventilation is formed between the interior material and the exterior material.   The breathable packaging bag according to claim 1, further comprising a printed layer between the exterior material and the interior material. A long packaging material that forms a packaging bag that is sealed at the periphery and filled with contents that require exhaust,
The wrapping material has a long interior material made of a breathable film or non-woven fabric that can be sealed on both sides in contact with a sealable surface of a long exterior material that can be sealed on at least one surface made of a water-impermeable film. A breathable packaging material characterized by being partially sealed.   The breathable packaging material according to claim 4, wherein both ends in the flow direction of the packaging material are left as free ends. A manufacturing method of a filled package in which a packaging bag is made by a vertical pillow bag filling machine, and the inside of the packaging bag is filled with contents that require exhaust,
A long interior material made of a breathable film or non-woven fabric that can be sealed on both sides and a long exterior material made of a water-impermeable film that can be sealed on at least one surface are overlapped, and the interior materials on both ends in the flow direction only. A solid seal to obtain a cylindrical body,
A step of partially sealing the solid-sealed portion and / or the interior material and the exterior material in the vicinity so as to leave an unsealed portion for ventilation in a part to form a vertical seal portion;
Filling the interior of the cylinder with contents,
A step of solid-sealing the interior materials and the interior material and the exterior material to form a transverse seal portion intersecting the longitudinal seal portion;
A method for producing an exhaustable contents-filled package, comprising:   Instead of overlapping the interior material and the exterior material, a long interior material that can be sealed on both sides made of a breathable film or a nonwoven fabric in advance is a long exterior material that can be sealed on at least one surface made of a water-impermeable film. 7. The evacuable contents filling according to claim 6, characterized in that the packaging material is overlapped in contact with the sealable surface of the material and partially sealed except for both ends in the flow direction as free ends. A method for manufacturing a package. A bag making method for producing a breathable packaging bag in which the periphery of a plurality of substrates is sealed and filled with contents necessary for exhaustion,
A long interior material made of a breathable film or non-woven fabric that can be sealed on both sides, and an exterior material made of a long impermeable film that can be sealed on at least one surface of the interior material. A plurality of width-wise solid seals by solid-sealing in the width direction only the interior material of one base material and at least one other long-side base material that can be sealed at least on one side as a base material at a predetermined interval along the flow direction Forming a part;
A step of partially sealing the solid seal part in the width direction and / or the interior material and the exterior material in the vicinity thereof, leaving a non-sealed part for ventilation in part.
A method for producing a breathable packaging bag, comprising: A bag making method for producing a breathable packaging bag in which the periphery of a plurality of substrates is sealed and filled with contents necessary for exhaustion,
A long interior material made of a breathable film or non-woven fabric that can be sealed on both sides, and an exterior material made of a long impermeable film that can be sealed on at least one surface of the interior material. A step of forming a solid seal portion on the side edge by solid-sealing only the interior material on one side edge or both side edges of the flow direction and another long base material capable of sealing at least one side;
A step of partially sealing the solid seal portion at the side end and / or the interior material and the exterior material in the vicinity thereof, leaving an unsealed portion for ventilation in part.
A method for producing a breathable packaging bag, comprising: A bag making method for producing a breathable packaging bag in which the periphery of a plurality of substrates is sealed and filled with contents necessary for exhaustion,
A long interior material made of a breathable film or non-woven fabric that can be sealed on both sides, and an exterior material made of a long impermeable film that can be sealed on at least one surface of the interior material. A base material is formed, and only the interior material and another long base material that can be sealed at least on one side are spaced apart by a predetermined distance along the flow direction to be solid-sealed in the width direction to form a plurality of width-direction solid seal portions. Process,
A step of solid-sealing only the interior material on one side end or both side ends of the flow direction and the other base material to form a solid seal portion on the side end;
A step of partially sealing the solid seal portion in the width direction and the solid seal portion at the side end and / or the interior material in the vicinity thereof and the other base material, leaving a non-sealed portion for ventilation in part. When,
A method for producing a breathable packaging bag, comprising:   The other base material is composed of a long interior material made of a breathable film or non-woven fabric that can be sealed on both sides, and a long impermeable film that can be sealed on the interior material so that at least one surface can be sealed. The method for producing a breathable packaging bag according to any one of claims 8 to 10.   A long interior material made of a breathable film or non-woven fabric that can be sealed on both sides is laminated in contact with a sealable surface of a long exterior material that can be sealed on at least one surface made of a water-impermeable film. The method for producing a breathable packaging bag according to any one of claims 8 to 11, wherein a sealed packaging material is used.

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