JPH08217089A - Independent packaging bag and its manufacturing method - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] A self-supporting packaging bag that holds a desiccant, oxygen scavenger, etc. using a wall material that allows gas such as moisture and oxygen to pass through but not powder or the like. provide. [Structure] A bag-forming surface base material 1 having heat sealability,
From the bag forming back substrate 1 ', the inverted V-shaped bottom member 3 in cross section, and the wall member 2 having the same size as the front or back substrate 1', which has heat sealability and gas permeability. The wall material 2 is superposed on the heat-sealing surface of either one or both of the front and back substrates 1 ', and the top portion is heat-sealed to form a heat-welded portion. A bottom material 3 is sandwiched between a base material 1 and a back base material 1'so that their heat-sealing surfaces face each other, and a front base material 1, a back base material 1 ', a wall material 2 and a bottom material. No. 3, each heat-sealing facing surface, the left and right end portions thereof, the front base material 1, the wall material 2, the bottom material 3, and the back base material 1 ′ and the bottom material 3. A heat-sealing portion is formed by heat-sealing at a lower end portion of the surface facing the sealability, and a desiccant or an oxygen scavenger is provided between the wall material 2 and the front or back substrate 1 '. It is a self-supporting packaging bag that holds auxiliary agents such as.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-supporting packaging bag, and more particularly to a self-supporting packaging bag having an auxiliary agent such as a desiccant and an oxygen scavenger.

[0002]

2. Description of the Related Art Heretofore, various soft packaging bags have been proposed for packaging foods and the like, using synthetic resin films or sheets. A so-called self-supporting packaging bag is known as one of them. This one is facing 2
It is manufactured by interposing a bottom sheet having an inverted V-shaped cross section between the side wall sheets, and heat-sealing the left and right end portions and the lower end portion. The self-supporting packaging bag is filled with various foods such as sweets, powdery substances, beverages, and the like, and packaged.

By the way, in recent years, depending on the contents to be packaged, auxiliary agents such as a desiccant and an oxygen scavenger are often held in a packaging bag to improve its storability and extend the shelf life. It is done. For example, an oxygen scavenger or the like is packaged at the same time as the contents, and oxygen in the package is cut off to prevent the contents from decaying, improving the preservability thereof and extending the shelf life.

[0004]

However, in the above, the auxiliary agent is often packaged together with the contents, and in this case, the auxiliary agent may be taken out together with the contents, For example, there is a drawback that infants and others may mistakenly use it. Alternatively, a side wall sheet may be spot-sealed by using a synthetic resin film or sheet to form a pocket portion, and an auxiliary agent may be inserted into the pocket portion. At a stage, etc., an unexpected force is applied to the package to cause deformation and the like, and the seal part of the package is destroyed, and the seal of the pocket part is peeled off so that the auxiliary agent is contained in the contents. However, it has the drawback that it is used together with the contents as it is. There is also a case where a small bag containing an auxiliary agent is attached to the side wall sheet, but in this case also, when the contents are taken out, the attaching part of the small bag is peeled off and taken out together with the contents. It also has the drawback of being lost.

[0005]

As a result of earnest studies to solve the above-mentioned problems, the present inventor has found that gases such as water and oxygen are permeable, but powders and the like are not permeable, and the heat transfer sheet is not permeable. Pay attention to the wall material having the flexibility, and use this together with the side wall sheet or the bottom material that constitutes the self-supporting packaging bag, and use an auxiliary agent between the side wall sheet or the bottom material and the wall material. The present invention has been completed by finding that, when the self-supporting packaging bag is configured to be held, an extremely good self-supporting packaging bag can be manufactured without dropping auxiliary agents and the like.

That is, according to the present invention, a bag-forming front base material having a heat-sealing property, a bag-forming back base material having a heat-sealing property, and a cross-section reverse V having a heat-sealing property. A letter-shaped bottom material,
A wall material having heat sealability and gas permeability and having the same size as the front or back base material, and the wall material of the front or back base material A heat-welding portion is provided by superposing the heat-sealing surface of one or both of them on the top-sealing surface, and further forming a bottom material between the front base material and the back base material. And sandwiching them so that their heat-sealable surfaces face each other, and the left and right ends of the heat-sealable surfaces of the front base material, back base material, bottom material, and wall material. Part and the lower end part form a heat-welded part, and further, an auxiliary agent such as a desiccant or an oxygen scavenger is sandwiched between the wall material and the front or back base material or both. The present invention relates to an independent packaging bag.

Further, according to the present invention, a bag-forming front base material having a heat-sealing property, a bag-forming back base material having a heat-sealing property, and a reverse cross section V having a heat-sealing property. Character bottom material and heat
It has a wall material having a toe-seal property and gas permeability, and the same size as the front or back base material, and the wall material is first used as either the front base material or the back base material. One or both heat-sealing surfaces are superposed and heat-sealed by the top-side heat-sealing surface, and then the front base material and the back base material are combined. Sandwiching the above-mentioned bottom material so that the respective heat-sealable surfaces face each other, and thereafter, the respective heat-sealing characteristics of the above-mentioned front base material, back base material, bottom material and wall material are opposed to each other. Heat seal both left and right ends of the surface, and then insert an auxiliary agent such as a desiccant or oxygen scavenger between the above wall material and either one or both of the front and back base materials. Next, each of the front base material, the wall material, the bottom material, the back base material, the wall material, and the bottom material is a face-sealing facing surface, and the lower end portion thereof is heat-sealed. Self-supporting packaging bag A manufacturing method.

[0008]

According to the present invention, a wall material having a heat-sealing property and permeable to gas but impermeable to powder or the like is used, which is used as a front base material, a back base material or a bottom material. First of all, it is used as a self-supporting packaging bag and holds auxiliary agents such as desiccant and oxygen scavenger between its wall material and front base material, back base material, etc. As long as the heat seal part or the wall material of the sex wrapping bag is not damaged or destroyed, the auxiliaries and the like can be retained in the package in an extremely stable state without dropping off. Further, in the present invention, since the wall material is integrally heat-sealed with the front base material, the back base material and the bottom material, the seal portion in the seal portion is excluded except for a seal failure during manufacturing. No phenomena such as seal breakage and seal damage are observed, and a very good packaging bag can be manufactured.

[0009]

DETAILED DESCRIPTION OF THE INVENTION The present invention described above will be described in more detail below. First, the materials used for the present invention will be described. In the present invention, as the material used for the front base material, the back base material and the bottom material, conventionally known synthetic resin films or sheets may be used alone or in any combination depending on the purpose of use and the like. Can be used. For example, low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polyolefin resin such as polypropylene,
Ethylene-vinyl acetate copolymer, ionomer-resin, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, polybutene-based resin, polymethylpentene-based resin, polyacrylic-based resin, polyacrylonitrile-based resin, Polyester resin, polyamide resin, polystyrene resin, polyvinyl chloride resin, polyvinylidene chloride resin, ethylene-vinyl acetate copolymer saponification product,
Films or sheets of various resins mainly composed of synthetic resin such as polycarbonate resin, fluorine resin, vinylon and cellophane can be used.

These films or sheets may be unstretched or uniaxially stretched. In the present invention, the film or sheet may be a coating film made of a composition containing the resin as a vehicle. The thickness of the resin film or sheet is arbitrary depending on the purpose of use of the packaging bag and the like, but is preferably about 10 to 200 μm.

Further, in the present invention, various kinds of paper, synthetic paper, etc. may be used for holding the so-called waist etc. in the packaging bag.

Further, in the present invention, for example, when a gas barrier property is required, for example, a polyvinylidene chloride resin film or a polyvinylidene chloride called K coat is coated. Resin film,
Stretched polyamide film, ethylene-vinyl acetate copolymer saponified film (EVAL) film, aluminum foil, aluminum vapor deposited resin film, silicon oxide, aluminum oxide vapor deposited metal oxide resin resin film, etc. Can also be used.

In the present invention, the materials mentioned above are used, and the materials are arbitrarily selected and combined according to the purpose of use of the packaging bag, and then extruded laminate,
The front base material, the back base material, and the bottom material can be manufactured by laminating them by dry laminating or the like.

In the above-mentioned front base material, back base material, and bottom material, in order to manufacture a packaging bag, one surface thereof, particularly, a portion where the three members are overlapped to form a heat-welded portion is a heat-sheath sheet. It is necessary to have the flexibility. Examples of the material that constitutes the above-mentioned heat-sealing property include low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear low-density polyethylene, polyolefin resins such as polypropylene, and ethylene-acetic acid listed above. Film or sheet of synthetic resin such as vinyl copolymer, ionomer resin, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, polybutene resin, polymethylpentene resin, or the like. A coating film or the like can be used. In the present invention, the other surface of the front base material, the back base material, and the bottom material needs to be non-heat-sealing when forming a packaging bag.

In the present invention, the wall material may be heat-welded to the heat-sealing surfaces of the front base material, the back base material and the bottom material mentioned above to form a heat-welded portion. It is necessary to have a heat-sealing property. Further, as the wall material of the present invention, moisture, gas such as oxygen is permeable, for example,
It is necessary to have the property of not permeating powders and the like that compose auxiliary agents such as desiccants and oxygen scavengers. Specifically, for example, when a woven fabric or a single or long fiber having a heat-sealing property after being resin-processed has a self-adhesive heat-adhesive property as it is or when it does not have such a property. Is a paper punch made from a needle punch or heat-bonded non-woven fabric using heat-adhesive resin, pulp, etc. Then, a paper base material having a heat-sealing property, or a porous film or sheet having a synthetic resin as a base material or a base material made of a microporous film thereof can be used. . For example, a base material such as the product name "Tyvek" manufactured by DuPont in the United States, specifically, a finely interwoven fiber bundle of high-density polyethylene is spun, and then this is combined with heat and pressure. It is possible to use a product that is bonded and has air permeability. The above wall material is a portion facing the respective heat sealable surfaces of the above-mentioned front base material, back base material, and bottom material at the time of manufacturing a packaging bag, and at least in a portion constituting a heat-welded portion. It is necessary to have a heat seal property, and basically, it is necessary that both surfaces have a heat seal property.

Further, in the present invention, the auxiliary agent or the like may improve the preservability of the contents packaged in the packaging bag or the anti-corrosion property thereof, for example, a desiccant, an oxygen scavenger, or an ultraviolet absorber. Known agents such as agents, antiseptic agents, and the like can be used. This can be done, for example, by using the chemical substances as they are in the form of powder or tablets, or by using these wall materials to make pouches, filling them, and sealing them. can do.

Next, in the present invention, a method for producing the self-supporting packaging bag according to the present invention by using the above-mentioned front base material, back base material, bottom material, wall material, auxiliary agent and the like will be described. To do. As shown in (a) of FIG. 1, FIG. 2 and FIG. 3 and (b) of FIG. 3, first, in the present invention, a front base material 1, a back base material 1 ′, a wall material 2, and a bottom material 3 are provided. And then, the wall material 2 is superposed on the heat-sealing surfaces A and A'of either the front base material 1 or the back base material 1'or both, and then the ceiling The portion 4 is heat-sealed to form the heat-welded portion X. Then, the bottom material 3 is sandwiched between the front base material 1 and the back base material 1 ′ so that their heat-sealing surfaces face each other, and thereafter the front base material 1 and the back base material 1 ′. The left and right end portions 5 and 6 of the material 1 ', the wall material 2 and the bottom material 3, and the respective face-seal surface A, A', B, B ', C facing each other are heat-sealed. To form the heat-welded portions Y and Y '. Next, in the present invention, after forming the heat-welded portions Y and Y'in the above, at the lower end portion forming the bottom portion of the packaging bag, between the wall material 2 and the front base material 1 and the back base material 1 '. An auxiliary agent 7 such as a desiccant or an oxygen scavenger is inserted into the bottom of the base material 1, the wall material 2 and the bottom material 3 and the bottom material 8 and the bottom material 1 ′ and the bottom material 3. The lower end 8'of the heat-sealing facing surfaces A, A ',
B, B ', C, etc. are heat-sealed with each other to form the heat-welded portions Z, Z'on the portion constituting the bottom of the bag, to manufacture the self-supporting packaging bag according to the present invention. be able to.

In the present invention, the above-mentioned manufacturing method is an example, and various manufacturing methods can be used. For example, in the above, when the auxiliary agent is inserted, the auxiliary agent is inserted before the lower end portion 8 and the lower end portion 8 ′ are heat-sealed, but the lower end portion 8 ′ is heat-sealed. Then, the heat-welded portion Z'is formed at the lower end portion 8 ', and the auxiliary agent 6 is inserted between the wall material 2 having the opening at the other lower end portion 7 and the front substrate 1, and then the lower end portion thereof is formed. The portion 8 may be heat-sealed to form the heat-welded portion Z to manufacture the self-supporting packaging bag of the present invention. Further, in the above, first, the heat transfer sheet of either the front base material 1 or the back base material 1'or both of them is used.
The wall member 2 is superposed on the flexible surfaces A and A ', and the top portion 4 is heat-sealed to form the heat-welded portion X. In this case, the left and right end portions are joined together. The heat-sealing surface may be heat-sealed to previously form the heat-welded portions on both left and right ends. In the present invention, the auxiliary agent 7 is inserted and the lower end portion 8 is heat-sealed to form the heat-welded portion Z. However, the auxiliary agent 7 is further used to form the wall material 2 and the front substrate 1. Since it may move freely without being fixed in the space with the back base material 1 ′, the wall material 2, the front base material 1, and the back base material 1 ′ are used to support the auxiliary agent 7 in order to fix it. The heat-sealed portion Q may be formed and fixed by heat-sealing at the upper portion 10 where the agent 7 is present. In this case, even if the self-supporting packaging bag is opened, the auxiliary agent 6 does not come out because the auxiliary agent 6 remains closed. Alternatively, in the present invention, the above-mentioned wall material 2 is superposed on either one or both of the front base material 1 and the back base material 1 ', or the heat sealable surfaces A and A', and the top portion thereof is superposed. 4 is heat-sealed to form the heat-welded portion X, but the heat-welded portion X has a large heat-sealed width so that the heat-welded portion X can be opened at the opening of the self-supporting packaging bag. If it is cut and opened in the middle of, the front or back base material and the wall material are still heat-sealed even when the bag is opened to form the heat-welded portion, so that the auxiliary agent is used as the bag. It does not go out when opening.

In the present invention, semicircular cutouts 9 are formed at both ends of the bottom member 3, respectively. The cutouts 9 are used to form the front base material 1 and the back base material. 1 '
The heat-sealing surfaces A, A ', B, B'of the wall material 2 and the wall member 2 are heat-sealed to form heat-welded portions T, T'. Thereby, in the present invention, the self-supporting property of the self-supporting packaging bag can be more favorably maintained.

The self-supporting packaging bag produced as described above, as shown in FIGS. 3 (a) and 3 (b), has a bag forming surface base material 1 having a heat seal property and a heat seal. Bag-forming backing substrate 1'having a sealing property and a cross-section reverse V having a heat sealing property
It is composed of a V-shaped bottom material 3 and a wall material 2 having heat sealing property and gas permeability, and the wall material 2 is used as either the front base material 1 or the back base material 1 '. One or both heat sealable surfaces A, A ', B and B'are superposed on each other and the top portion 4 is heat-sealed to provide a heat-welded portion X. 1 and the back substrate 1 ', the bottom material 3 is attached to each of the
It is sandwiched so that the tosillable surfaces A, A ', B, B', C face each other, and each of the above-mentioned front base material 1, back base material 1 ', bottom material 3, and wall material 2 is heat-treated. Tosile facing surfaces A, A ', B, B
′ And C are left and right end portions 5 and 6 and lower end portions 8 and 8 ′.
In the heat-welded portion Y, Y ', Z, Z', and further between the wall material 2 and the front or back substrate 1, 1'or both of them, an auxiliary agent such as a desiccant or an oxygen scavenger. The present invention relates to a self-supporting packaging bag, which is characterized in that 7 is sandwiched. Thus, the self-supporting packaging bag obtained above is filled with the content by filling the content from the opening at the upper end thereof and then sealing the opening with a heat seal or the like. You can get the body.

[0021]

According to the self-supporting packaging bag obtained as described above,
A self-supporting packaging bag that uses a wall material that is tossile and that allows gas to permeate but does not allow powder to permeate, and that is used integrally with the front base material, back base material, bottom material, etc. First, since the auxiliary material such as a desiccant and an oxygen scavenger is held between the wall material and the front base material and the back base material, the heat sheet of the self-supporting packaging bag is formed.
The auxiliary agent or the like can be retained in the package in an extremely stable state without falling off unless the curled portion or the wall material is damaged or destroyed. Further, in the present invention, since the wall material is integrally heat-sealed with the front base material, the back base material and the bottom material, the seal portion in the seal portion is excluded except for a seal failure during manufacturing. No phenomena such as seal breakage and seal damage are observed, and a very good packaging bag can be manufactured. Therefore, in the present invention, when the contents are filled and self-supporting, the auxiliary agent is located on the side or near the bottom of the self-supporting packaging bag, and the auxiliary agent and the contents are wall materials. Therefore, when the contents are opened and taken out from the upper part of the packaging bag, there is no danger of auxiliary agents coming out, and it is possible to prevent accidental ingestion and to prevent mixing into the contents such as powder. It is possible. In this case, if the heat-welding portion for fixing the above-mentioned auxiliary agent is formed between the wall material and the front base material and the back base material, a particularly remarkable effect is exhibited. Further, in the present invention, since the filling of the auxiliary agent is to be inserted from the bottom of the packaging bag when the packaging bag is manufactured in advance, the auxiliary agent is not touched when filling the contents, which is extremely hygienic. There is also an advantage to say.

[0022]

EXAMPLES The present invention will be described in more detail with reference to examples. Example 1 Polyethylene terephthalate was used as the front and back substrates.
Laminated film consisting of a laminated film, 12 μm / aluminum foil, 9 μm / polyethylene film (heat sealing), 40 μm, which is 170 mm × 25 in width × length.
Each piece was prepared by cutting it to 0 mm. Next, as the bottom material, the same laminated material as that used for the front base material and the back base material is used.
Cut it in half and fold it in half, then measure horizontal x vertical 170mm x 45
mm, and semicircular cutouts were provided on both sides.
Further, as a wall material, a spun-pond non-woven fabric made of polyethylene was used, and this was prepared by cutting it into 170 mm × 250 mm in width × length. Next, using the front base material, the back base material, the wall material, and the bottom material prepared as described above, first, the wall material is overlaid on the heat-sealing surface of the front base material, and the top portion thereof is formed. To see
I did. Next, the front base material and the back base material were arranged so that the heat-sealing surface and the wall material surface were opposed to each other. Next, the above-mentioned bottom material is interposed between the above-mentioned front base material and the back base material, and thereafter, at the left and right end portions of the front base material, the back base material, the wall material and the bottom material, Each heat-sealing surface facing each other was heat-sealed to form a heat-welded portion. At this time, in the semi-circular cutout portion of the bottom material, the front base material, the wall material, and the back base material are facing each other on the facing surface.
It was tossed to form a heat-welded portion. Next, after forming the heat-welded parts on the left and right ends as described above, at the lower end forming the bottom of the packaging bag, insert an oxygen scavenger between the wall material and the table base material, then the table base material, The bottom end composed of the wall material and the bottom material and the bottom end composed of the back base material and the bottom material are heat-sealed.
Then, a heat-welded portion was formed in the portion constituting the bottom portion of the bag to produce a self-supporting packaging bag.

[Brief description of drawings]

FIG. 1 is a front base material 1, a back base material 1 ′, a wall material 2, and a bottom material 3.
It is a perspective view explaining the schematic structure of.

FIG. 2 is a front base material 1, a back base material 1 ′, a wall material 2, and a bottom material 3.
It is a schematic sectional drawing which shows the state when it is made to oppose.

FIG. 3 (a) is a plan view showing a schematic configuration of a self-supporting packaging bag.

FIG. 3 (b) is a view showing a schematic configuration of a self-supporting packaging bag.
FIG. 7A is a sectional view taken along line I-I ′ of FIG.

[Explanation of symbols]

 1 Front base material 1'Back base material 2 Wall material 3 Bottom material

Claims (2)

[Claims] 1. A bag-forming front base material having a heat-sealing property, a bag-forming back base material having a heat-sealing property, and an inverted V-shaped bottom material having a heat-sealing property. A wall material having heat sealability and gas permeability and having the same size as the front or back base material, and the wall material being the front or back base material. Of one or both of them, and the top portion thereof is heat-sealed to provide a heat-welded portion, and a bottom is provided between the front base material and the back base material. The material is sandwiched so that the respective heat-sealing surfaces face each other,
The heat-sealing facing surfaces of the front base material, the back base material, the bottom material, and the wall material constitute the heat-welded portions at the left and right end portions and the lower end portions thereof, and the wall material A self-supporting packaging bag, characterized in that an auxiliary agent such as a desiccant or an oxygen scavenger is sandwiched between the front and / or back substrates or both. 2. A bag-forming front base material having a heat-sealing property, a bag-forming back base material having a heat-sealing property, and an inverted V-shaped bottom material having a heat-sealing property. A wall material having heat-sealing property and gas permeability and having the same size as the front or back base material. First, the wall material is formed into the front base material or the back base material. Of one or both of the above, and heat-sealed by the heat-sealing surface of the top portion, and then the front base material and the back substrate. The above-mentioned bottom material is sandwiched between the materials so that the respective heat-sealable surfaces face each other, and thereafter, the respective heat-sheets of the above-mentioned front base material, back base material, bottom material and wall material. Heat-sealing both left and right ends of the opposite surfaces, and then assisting with a desiccant, oxygen scavenger, etc. between the above wall material and either or both of the front and back base materials. Insert the agent, next Independent self-standing characterized in that each of the face-sealing surfaces of the front base material, the wall material, and the bottom material, and the back base material, the wall material, and the bottom material is a face-sealing opposing surface, and the lower end portion thereof is heat-sealed. Method for manufacturing plastic packaging bags.