JPH08217087A - Self-standing packaging bag and production thereof - Google Patents

Abstract

PURPOSE: To retain an auxiliary agent in a packing bag in a stable state, by retaining the auxiliary agent between the wall materials which pass water and gas but do not pass powdery materials etc., and which have a heat-sealing property and welding it together with the bottom material of the packaging bag. CONSTITUTION: A front base material 1, a rear base material 1' a wall material 2, and a bottom material 3 are prepared. The front base material 1 and the rear base material 1' are arranged so as to oppositely position the heat-sealing faces A, A' thereof. A wall material 2 with a reverse V-shaped section having a heat-sealing property faces B, B' at both faces and a bottom material 3 with a reverse V-shaped section having a heat-sealing property face C are superposed with each other so as to form a M-shaped section. The wall material 2 and the bottom material 3 are interposed between the front base material 1 and the rear base material 1' and respective heat-sealing faces A, A', B, B', C are heat-sealed at both right and left side ends 4, 5 to form heat-welded parts X, X'. Then, an auxiliary agent 6 like a drying agent, a deoxidixzer etc., is charged between the wall materials 2 at the lower end forming the bottom and the lower end parts 7, 7' composed of the front and rear base materials 1, 1', the wall material 2, and the bottom material 3 are heat-sealed to finally form heat-welding parts Y, Y'.

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 a wall material that has a self-supporting property, and use this together with the side wall sheet, bottom material, etc. that make up the self-supporting packaging bag, and also by holding an auxiliary agent between the wall material and the wall material, it becomes self-supporting. The present invention has been completed by discovering that an excellent self-supporting packaging bag can be produced without dropping auxiliary agents and the like when a flexible packaging bag is constructed.

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,
It is composed of a wall material having an inverted V-shaped cross section having heat sealability and gas permeability, and the above-mentioned bottom material and the above wall material are overlapped to form an M-shaped cross section. And the wall material are sandwiched between the front base material and the back base material such that the heat sealable surfaces face each other, and the front base material, the back base material, the bottom material, and the wall. Heat-sealing portions are formed at the left and right end portions and the lower end portion of each heat-sealing facing surface with the material, and further, a desiccant, an oxygen scavenger or the like is assisted between the wall material and the bottom material. The present invention relates to a self-supporting packaging bag, which is characterized by sandwiching a drug.

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 is composed of a wall material having an inverted V-shaped cross-section having a tosile property and gas permeability. First, the above-mentioned bottom material and the above-mentioned wall material are superposed to form an M-shaped cross-section, and then the bottom material. Both wall materials are sandwiched between the front base material and the back base material such that their heat-sealing surfaces face each other, and then the front base material, the back base material, the bottom material, and the wall. Each of the heat-sealing facing surfaces of the wood is heat-sealed at both left and right ends thereof, and then an auxiliary agent such as a desiccant or an oxygen scavenger is provided between the wall materials. Then, the front base material, the wall material and the bottom material, and the back base material and the bottom material are face-to-face facing each other, and the lower end portion thereof is heat-sealed. The present invention relates to a method for producing an independent packaging bag.

[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, since the self-supporting packaging bag is constructed integrally with the wall material and an auxiliary agent such as a desiccant or an oxygen scavenger is held between the wall material and the wall material, Unless the toe seal or the wall material is damaged or destroyed, the auxiliary agent can be retained in the package in a very 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. It is possible to produce a very good self-supporting packaging bag without the phenomenon such as seal breakage and seal damage.

[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 of the packaging bag. It can be used as a laminate. 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 resin, polymethylpentene resin, polyacrylic resin, polyacrylonitrile resin, polyester resin, polyamide resin, polystyrene resin, polyvinyl chloride resin, polyvinylidene chloride resin Resins, saponified ethylene-vinyl acetate copolymers, polycarbonate-based resins, fluorine-based resins, vinylon, various resin films or sheets mainly composed of synthetic resins such as 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 or synthetic paper can 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 with dry laminate 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 resin thereof It is possible to use a coating film or the like made of a composition having a vehicle as a vehicle. 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. Then, the front base material 1 and the back base material 1'are arranged so that the heat-sealing surfaces A and A'face each other. On the other hand, a wall member 2 having an inverted V-shaped cross section having heat sealable surfaces B and B'on both sides and a heat sink.
The inverted V-shaped bottom members 3 having a tosible surface C are stacked so as to have an M-shaped section. Then, the wall material 2 and the bottom material 3 are interposed between the front base material 1 and the back base material 1 ',
Thereafter, the left and right end portions 4 and 5 of the front base material 1, the back base material 1 ', the wall material 2 and the bottom material 3 are opposed to each other.
The heat-resistant portions A, A ', B, B', and C are heat-sealed to form the heat-welded portions X and X '. Next, in the present invention, after forming the heat-welded portions X and X ′ as described above, at the lower end portion forming the bottom portion of the packaging bag, a desiccant between the wall material 2 and the wall material 2,
An auxiliary agent 6 such as an oxygen scavenger is inserted, and then a lower end portion 7 composed of the front base material 1, the wall material 2, and the bottom material 3, and the back base material 1 ',
And a bottom end portion 7'consisting of the bottom material 3 and having its heat-sealing facing surfaces A, B, B ', B', B, C, and A.
It is possible to manufacture the self-supporting packaging bag according to the present invention by heat-sealing C ′ and C to form the heat-welded portions Y and Y ′ in the portion forming the bottom of the bag.

In the present invention, the above-mentioned manufacturing method is one example, and the self-supporting packaging bag can be manufactured by various manufacturing methods. For example, in the above, when the auxiliary agent is inserted, the auxiliary agent is inserted before heat-sealing the lower end portion 7 and the lower end portion 7 ', but the lower end portion 7'is first inserted. A heat seal is applied to the lower end 7 '.
The heat-welded portion Y'is formed on the other side, and the auxiliary agent 6 is inserted between the wall material 2 and the wall material 2 which are open at the other lower end portion 7, and then the front base material 1, the wall material 2 and Bottom part 7 composed of bottom material 3
May be heat-sealed to form the heat-welded portion Y to manufacture the self-supporting packaging bag of the present invention.

It should be noted that semicircular cutouts 8 are formed at both ends of the bottom member 3, respectively. The cutouts 8 are used to form the front base material 1, the back base material 1'and the wall. The heat-sealing surface of the material 2 is heat-sealed so that the heat-welded portions are Z and Z '.
Is formed. 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 an inverted V-shaped wall material 2 having heat sealability and gas permeability, and the bottom material 3 and the wall material 2 are superposed on each other. The cross section is M-shaped,
Further, both the bottom material 3 and the wall material 2 are attached between the front base material 1 and the back base material 1'to each heat sealable surface A, A ', B, B.
′, C are sandwiched so that they face each other, and the above-mentioned front substrate 1
The heat-sealing portions X, X'at the left and right end portions 4, 5 and the lower end portions 7, 7'of the heat-sealing opposing surfaces of the back substrate 1 ', the bottom material 3, and the wall material 2, respectively. Y and Y'are constituted, and further, an auxiliary agent 6 such as a desiccant or an oxygen scavenger is sandwiched between the wall material 2 and the bottom material 3 described above. 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. In addition, since the auxiliary material such as desiccant and oxygen absorber is held between the wall material and the wall material, the heat seal part of the self-supporting packaging bag or the wall material is damaged or destroyed. Unless it is carried out, the auxiliary agent can retain the auxiliary agent in the package in a very 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. Therefore, in the present invention, when the contents are filled and self-supporting, the auxiliary agent is located at or near the bottom of the self-supporting packaging bag, and the auxiliary agent and the contents are separated by the wall material. Therefore, when the contents are taken out by opening from the upper part of the packaging bag, there is no fear that the auxiliary agent will come out, and it is possible to prevent accidental ingestion and to prevent mixing into the contents such as powder. It is a thing. 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.
Furthermore, a spun-pond nonwoven fabric made of polyethylene was used as a wall material, and this was cut into a width × length of 170 mm × 90 mm and further half-folded to a width × length of 170 mm × 45 mm. Next, using the front base material, the back base material, the wall material, and the bottom material prepared as described above, first, the front base material and the back base material are connected to each other.
It was placed so that it faces the tosile surface. On the other hand, the wall material and the bottom material described above were laminated so as to have an M-shaped cross section. Next, the wall material and the bottom material described above are interposed between the front base material and the back base material, and then the left and right end portions of the front base material, the back base material, the wall material, and the bottom material. And each of the opposing seats
The flexible surface was heat-sealed to form a heat-welded portion. At this time, in the semicircular cutout portion of the bottom material, the front base material, the wall material, and the back base material were heat-sealed on the opposing surfaces 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 that forms the bottom of the packaging bag, insert an oxygen scavenger between the wall material and the wall material, and then the lower end composed of the front base material, the wall material and the bottom material, and the back base material, and The lower end portion constituted by the bottom material was heat-sealed to form a heat-welded portion in the portion constituting the bottom portion of the bag to manufacture 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 heat-sealing and gas-permeable wall material having an inverted V-shaped cross-section, and the above-mentioned bottom material and the above-mentioned wall material are overlapped to form an M-shaped cross-section. Both the material and the wall material are sandwiched between the front base material and the back base material so that the heat sealable surfaces face each other, and the front base material, the back base material, and the bottom material. Heat-welding portions are formed at both left and right end portions and lower end portions of each heat-sealing surface facing the wall material, and a desiccant, an oxygen scavenger and the like are further provided between the wall material and the bottom material. A self-supporting packaging bag characterized by being sandwiched with an auxiliary agent. 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 heat-sealing and gas-permeable wall material having an inverted V-shaped cross-section, and firstly, the above-mentioned bottom material and the above-mentioned wall material are laminated to form an M-shaped cross-section. Both the bottom material and the wall material are sandwiched between the front base material and the back base material such that their heat-sealing surfaces face each other, and then the front base material, the back base material, and the bottom. The sheet and the wall material are face-to-face facing each other, and the left and right end portions thereof are heat-sealed, and then a desiccant, an oxygen scavenger, etc. is provided between the wall material and the wall material. Of the auxiliary material, and then heat seals the lower end portions of the front base material, the wall material, the bottom material, and the back base material, the bottom material on the respective face-sealing facing surfaces. Characterized by Manufacturing method for self-supporting packaging bags.