JPH09216640A - Retort pouch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make each room enough divided during distribution and to make a temporarily sticked part released when a retort pouch is used and to mix different kinds of contents as the result by using an undrawn polypropylene resin as an inner heat-sealable film and changing heat seal conditions for the peripheral part of a bag and the temporarily sticked part for dividing the bag into two rooms. SOLUTION: Two sheets of laminated bodies A wherein at least a heat- resistant base film 1 and a heat-sealable film 2 are successively laminated from the outside and as the heat-sealable film 2, the surface of an undrawn polypropylene resin film 2' consisting of a compsn. wherein an ethylene- propylene copolymer is a main component and an olefin rubber component is added is laminated. Then, a bag body is constituted by forming a heat seal part 4 on the peripheral part and a temporarily sticked part 5 is provided at a specified position and different kinds of contents 6 and 7 are stored in two divided rooms. In this case, the temporarily sticked part 5 is heat-sealed under a condition being milder than the heat seal temp., pressure and time of the seal part 4 of the peripheral part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retort pouch, and more particularly to a retort pouch capable of accommodating contents of another type and mixing the contents of another type by peeling off a temporary adhesive portion during use. is there.

[0002]

2. Description of the Related Art Conventionally, various food packaging techniques have been proposed, and one of them is the retort packaging technique.
This is a packaging technique in which the adjusted food is packed in a bag-shaped or other-shaped container made of a plastic film or metal foil or a multilayered product of these, sealed by heat melting, and sterilized by heating under pressure. . Initially,
It was started from stuffed and sterilized, but in recent years, with the development of the food processing industry, the packaging industry, etc., the contents to be stuffed have become abundant, and packaging technology for heat-resistant containers has been developed. It is expected to form a new processed food field and develop it. By the way, the retort food as described above is usually one in which the ingredients, the seasoning liquid, etc. are integrally packed and packaged. Therefore, in such a case, the seasoning fluid, etc. permeates the ingredients during storage. However, there is a problem that the original taste of the ingredient is lost and the ingredient changes color. Therefore, in recent years, in retort foods, three-sided seals, four-sided seals, and the like are provided with a temporary adhesive portion and divided into two compartments, and each compartment stores different kinds of contents, and when used. A retort pouch consisting of a double bag for mixing capable of mixing the contents of different types by peeling off the temporary adhesive portion has been proposed, and it has been attempted to provide a retort product excellent in taste, appearance and the like. .

[0003]

However, in the retort pouch consisting of the above-mentioned double bags for mixing,
Each room of the temporary adhesion part is divided at the time of distribution, etc., but it is necessary that it has a structure that can be peeled off and mixed with different kinds of contents at the time of use. In reality, it has not been proposed that a retort pouch that can sufficiently satisfy the requirements and that is composed of a double bag for mixing can be sufficiently satisfied. For example, when the retort pouch is pressed by external force during distribution and the like, there is a problem that the temporary adhesive portion is easily peeled off to mix different kinds of contents. When one of the contents is a liquid substance and the other is a solid substance, even if the temporary adhesive portion is peeled and mixed, the temporary adhesive portion is not sufficiently peeled and the temporary adhesive portion is damaged. Then, there is also a problem that the solid matter is caught in the temporary adhesion portion and is not mixed as desired. Furthermore, the seal strength of the temporary adhesive portion is too strong, and the temporary adhesive portion does not peel off. Therefore, the present invention, in the retort pouch consisting of a double bag for mixing, the structure of the temporary adhesion portion, the adhesiveness, etc. are improved, each chamber is partitioned at the time of distribution, etc. It is an object of the present invention to provide a retort pouch made of a double bag for mixing having a temporary adhesive portion capable of mixing objects.

[0004]

As a result of various studies aimed at solving the above problems, the present inventor has made ethylene-propylene copolymer as a main component and adding an olefinic rubber component to it. Paying attention to the fact that the unstretched polypropylene resin film comprising the composition has a heat seal property, and using this as a heat seal film on the inner surface of the retort pouch, and the heat seal The conditions for heat-sealing the peripheral portion of the outer peripheral end when forming the bag and the conditions for heat-sealing when providing a temporary adhesion portion that divides the bag into two chambers are as follows. By changing the former condition, the latter temporary adhesion part was formed under a condition relaxed from the former condition, and each chamber was sufficiently partitioned at the time of distribution, etc., and the temporary adhesion part was peeled off at the time of use to mix different kinds of contents. Can be mixed for two It has found that it is possible to produce a retort pouch made of a bag in which the present invention has been completed.

That is, according to the present invention, a seal portion is provided on the peripheral portion of the outer peripheral end portion to form a bag body, and a temporary adhesive portion that divides the bag body into two chambers is provided. A double bag for mixing, in which contents of different types are stored in each of the partitioned two chambers, and the temporary adhesive portion is peeled off at the time of use to mix the contents of different types, and the double bag body. From the outside to the inside, at least a heat-resistant substrate film and a heat-sealing film, or a heat-resistant substrate film, a gas barrier film and a heat-sealing film. An unstretched polypropylene resin having a constitution in which layers are sequentially laminated, and the above-mentioned heat-sealable film is composed of ethylene-propylene copolymer as a main component and an olefin rubber component added thereto. Use film Relates retort pouch, wherein Rukoto.

Further, according to the present invention, in the above-mentioned retort pouch, a seal portion provided at a peripheral portion of an outer peripheral end portion is provided.
Heat seal temperature 190 to 250 ° C, pressure 0.5 to 10
A seal portion is formed by heat-sealing under the conditions of Kg / cm ² and a heating and pressurizing time of 0.5 to 30 seconds, and the temporary adhesive portion is heated to a heat-sealing temperature of 150 to 190. ℃, pressure 0.5
The present invention relates to a retort pouch, which is characterized by being heat-sealed to form a temporary adhesive portion under conditions of ˜5 Kg / cm ² and heating / pressurizing time of 0.5-10 seconds.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail below. First, in the above-mentioned present invention, the retort pouch according to the present invention will be described with reference to the drawings by exemplifying a few specific examples. Figs. 1 and 2 show a bag body constituting the retort pouch according to the present invention. FIG. 3 is a cross-sectional view showing an example of a layer structure of a laminate used for manufacturing, and FIG.
FIG. 4 is a perspective view showing an example of the structure of the retort pouch according to the present invention manufactured by using the laminated body shown in FIG. 1.
FIG. 4 is a sectional view taken along line YY ′ of the retort pouch shown in FIG. 3. First, in the present invention, as the laminate used for manufacturing the bag body that constitutes the retort pouch, as shown in FIG. 1, at least the heat-resistant base film 1 and the heatshed from the outside to the inside. -Resistive film 2
It is possible to use a laminate A in which the above are sequentially laminated, or a laminate B in which the heat resistant substrate film 1, the gas barrier film 3 and the heat sealable film 2 are sequentially laminated. Thus, in the present invention, in the laminate A or the laminate B, the heat-sealable film 2 contains ethylene-propylene copolymer as a main component,
It is desirable to use an unstretched polypropylene resin film 3'made of a composition obtained by adding an olefin rubber component to this.

Next, in the present invention, an example of the structure of the retort pouch according to the present invention will be described by exemplifying the retort pouch manufactured by using the laminate A shown in FIG. As shown in FIG. 4, two sheets A, A of the above-prepared laminated body are prepared, and the surfaces of the unstretched polypropylene-based resin film 2 ′ as the heat-sealing film 2 are laminated so as to face each other, Next, the peripheral portion of the outer peripheral end is heat-sealed to form a seal portion 4 to form a bag body, and a temporary adhesive portion 5 that divides the bag body into two chambers is provided at a predetermined position of the bag body. The contents 6 and 7 of different types are provided in the two chambers that are provided and divided by the temporary adhesion portion 5, and the temporary adhesion portion 5 is peeled off at the time of use to mix the contents 6 and 7 of different types. A double bag C for mixing which can be manufactured is manufactured. Thus, in the present invention, the mixing double bag C produced above is subjected to a retort processing treatment, that is, a heat and pressure sterilization treatment to produce a retort pouch according to the present invention. For example, by applying pressure or the like from the outside, or by holding the part of the temporary adhesive part in your hand and pulling it to both sides, the part of the temporary adhesive part is peeled off and the different types of contents stored in the two chambers are mixed. Then, the package is opened and then used, for example, for food. The example given above is an example of the retort pouch according to the present invention, and the present invention is not limited thereto.

In the above, various methods can be adopted as the method of filling and packaging the different kinds of contents 6 and 7. For example, the peripheral portion of the outer peripheral end is heat-sealed to seal the seal portion 4. When forming, for example, the peripheral portions of the left and right outer peripheral ends of the laminate A, A are heat-sealed to form the seal portions 4 and 4,
Further, the temporary adhesive portion 5 is formed, while the peripheral portions of the upper and lower outer peripheral end portions of the laminated bodies A, A are not heat-sealed but are left as unsealed portions, and then the openings are formed. Part is used as an opening for filling the contents, and the two chambers are filled with different kinds of contents 6 and 7 from above and below, respectively, and then the openings of the openings provided above and below are not filled. By heat-sealing the seal portion to form the seal portions 4 and 4, the contents 6 and 7 can be packed in the two chambers.

Thus, in the present invention, the retort pouch made of the double mixing bag C manufactured as described above is shown in (1), (2) and (3) of FIG. As shown in the plan view, the double bag C for mixing, which is composed of the laminates A and A manufactured as described above and in which the contents 6 and 7 are filled and packaged, is subjected to a retort processing treatment, that is, a heat and pressure sterilization treatment. To produce a retort pouch [(1) in FIG. 6]. When using the retort pouch, for example, external force is applied to peel off the temporary adhesive portion 5, and the temporary adhesive portion 5 is cut off, As shown by P, the different types of contents 6 and 7 contained in the two chambers are mixed [(2) in FIG. 6], and then,
The upper end portion of the double bag C is cut and opened using, for example, scissors, and the mixed contents 6 and 7 are transferred to tableware or the like to be used for food or the like ((in FIG. 6). 3)]. In addition, in the figure, 4 and 5 represent the seal part which comprises the double bag C similarly to the above. The double bag for mixing according to the present invention is used for filling and packaging of products such as foods, chemicals, pharmaceuticals, adhesives, etc., in which two components are mixed just before use. Is what you can do.

Next, in the above-mentioned present invention, the materials constituting the retort pouch according to the present invention will be explained. First, as the heat-resistant base film according to the present invention, the basic materials constituting the retort pouch according to the present invention are described. Since it becomes a material and can withstand retort processing,
A film or sheet of a resin having excellent properties in mechanical, physical, chemical, etc. can be used, and specifically, for example, polyester resin, polyamide resin, polyaramid resin, A film or sheet of a tough resin such as a polypropylene resin, a polycarbonate resin, a polyacetal resin, a fluorine resin, or the like can be used. Thus, as the resin film or sheet, an unstretched film,
Alternatively, any of uniaxially or biaxially stretched films and the like can be used. Also,
In the present invention, the thickness of the resin film or sheet may be any thickness as long as it has heat resistance and can be kept to the minimum necessary for strength, rigidity, etc., and is preferably about 10 μm to 50 μm. Is about 12 μm to 25 μ
Most preferred is m.

Next, in the present invention, a gas barrier film will be described. As such a film, a material having a property of blocking light such as sunlight or a property of not transmitting water vapor, water, gas, etc. is used. This may be a single base material or a composite base material in which two or more kinds of base materials are combined. Specifically, for example, a resin film having an aluminum foil having a light-shielding property and a barrier property or a vapor deposition film thereof,
Silicon oxide having barrier properties, a resin film having a vapor deposited film of an inorganic oxide such as aluminum oxide, water vapor,
It has a film or sheet of resin such as low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene, ethylene-propylene copolymer, etc. having a barrier property against water, etc., and a gas barrier property. Polyvinylidene chloride, polyvinyl alcohol,
A film or sheet of a resin such as a saponified ethylene-vinyl acetate copolymer, a colorant such as a pigment on the resin, and the like,
It is possible to use films or sheets of various colored resins having a light-shielding property obtained by adding desired additives and kneading to form a film. These materials can be used alone or in combination of two or more. The thickness of the above-mentioned film or sheet is arbitrary, but is usually preferably about 5 μm to 300 μm, more preferably about 10 μm to 100 μm. Further, in the above, an aluminum foil having a thickness of about 5 μm to 30 μm, and an aluminum or inorganic oxide deposited film having a thickness of about 100 to 2000 mm can be used. Examples of the resin film supporting the above-mentioned vapor-deposited film include a polyester film, a polyamide film, a polyolefin film, a polyvinyl chloride film, a polycarbonate film, a polyvinylidene chloride film, a polyvinyl alcohol film, and an ethylene-acetic acid film. Saponified vinyl copolymer films and the like can be used. In the above,
When the above-mentioned resin film supporting the vapor-deposited film becomes a laminate or a bag, the resin film may function as a heat-resistant substrate film.

Next, in the present invention, a heat sealable film will be described.
As long as it can withstand retort processing and can be melted by heat and fused to each other, specifically, for example, low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene, Ethylene-vinyl acetate copolymer, ionomer resin, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, ethylene-methacrylic acid copolymer, ethylene-propylene copolymer, methylpentene polymer, polybutene Films or sheets of resins such as polymers, acid-modified polyolefin resins, and the like can be used. The thickness of the film is 10 μm to 3
It is desired to be around 00 μm, preferably around 20 μm to 100 μm.

By the way, in the present invention, it is preferable to use an unstretched polypropylene resin film having a heat seal property among the above heat seal films. This is because, as will be described later, when forming the temporary adhesive portion, it is possible to easily adjust the adhesiveness of the portion to make it easily peelable. Thus,
In the present invention, among the unstretched polypropylene-based resin films having the above-mentioned heat-sealing property, specifically, ethylene-propylene copolymer is a main component, and an olefin-based rubber component is added thereto, Further, it is possible to use an unstretched polypropylene-based resin film having a heat-sealing property obtained by forming a composition by sufficiently adding desired additives and kneading the mixture sufficiently, for example, extrusion molding. desirable. In the above, as the ethylene-propylene copolymer, for example, ethylene-propylene block copolymer, ethylene-propylene random copolymer and the like can be used, and thus, as the copolymerization ratio of ethylene and propylene, propylene is used. Of about 80 to 97 mol% can be used. Further, in the above, as the olefin-based rubber component, for example, one or more olefin-based rubber components composed of C _{2 to} C ₄ such as isoprene rubber, inbutylene rubber and ethylene-propylene rubber can be used, Thus, in the present invention, the use of such an olefinic rubber component mainly exerts an effect of improving the cold shock resistance of the retort product, and further, a seal at the time of sealing the temporary adhesive portion. -It is used to achieve the effect of stabilizing the strength of the rubber.

Further, in the above, in the composition containing the above-mentioned ethylene-propylene copolymer as a main component and adding the olefinic rubber component thereto, other additives such as linear low-density polyethylene and the like are further added. Other resins, fillers, dispersants, colorants, etc. can be optionally added. Next, in the present invention, the mixing ratio of the ethylene-propylene copolymer and the olefin rubber component is the ethylene-propylene copolymer-100.
5 to 30 parts by weight of olefinic rubber component relative to parts by weight,
It is preferable to add 10 to 20 parts by weight. In the above, if it is 5 parts by weight or less, the cold impact resistance is lowered, and the seal strength of the temporary adhesive portion is not stable, which is not preferable, and if it is 30 parts by weight or more, it is not desirable for parts other than the temporary adhesive portion. The seal strength is low, the heat resistance is low, and problems such as fusion during retorting occur, which is not preferable. In the present invention, the thickness of the unstretched polypropylene film is 10 μm to 100 μm.
Position, preferably 30 to 70 μm. Next, in the present invention, the unstretched polypropylene-based resin film as described above is used as a heat-sealable film to form a sheet around the outer peripheral edge of the bag. It is possible to adjust the conditions for heat-sealing the seal portion and the temporary adhesive portion that divides the bag into two chambers, and to form a good seal portion and temporary adhesive portion. It has advantages.

Next, since the retort pouch is usually subjected to severe physical and chemical conditions, strict packaging suitability is required for the packaging material constituting the retort pouch, and the deformation preventing strength is high. , Drop impact strength, pinhole resistance, heat resistance, sealability, quality maintenance, workability, hygiene, etc. are required. Therefore, in the present invention, as described above, In addition to the materials, other materials satisfying the above conditions can be arbitrarily used. Specifically, for example, low density polyethylene, medium density polyethylene, high density polyethylene, linear low density Polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-ethyl acrylate copolymer, ethylene-
Acrylic acid or methacrylic acid copolymer, methylpentene polymer, polyolefin resin such as polybutene resin, polyvinyl chloride resin, polyvinyl acetate resin, polyvinylidene chloride resin, vinyl chloride-vinylidene chloride copolymer, Poly (meth) acrylic resin, polyacrylonitrile resin, polystyrene resin, acrylonitrile-styrene copolymer, acrylonitrile-butadiene-styrene copolymer, polyester resin, polyamide resin, polycarbonate resin, Polyvinyl alcohol
Film, sheet of known resin such as ethylene, saponified ethylene-vinyl acetate copolymer, fluorine resin, diene resin, polyacetal resin, polyurethane resin, etc. is arbitrarily selected and used. be able to. Other,
For example, a film such as cellophane, synthetic paper, or the like can be used. In the present invention, the above-mentioned film or sheet can be used in any of unstretched and uniaxially or biaxially stretched. The thickness is arbitrary, but can be selected from a range of several μm to 300 μm. Further, in the present invention, the film or sheet may be any film such as an extruded film, an inflation film, or a coating film.

Next, in the above-mentioned present invention, a method for producing a laminated body using the above-mentioned materials will be explained. As such a method, an ordinary packaging material is laminated.
Method such as wet lamination method, dry lamination method, solventless dry lamination method, extrusion lamination method, T-die coextrusion molding method, coextrusion lamination method, etc. You can Thus, in the present invention, when performing the above-mentioned lamination, the film can be subjected to a pretreatment such as a corona treatment and an ozone treatment, if necessary. Type), polyethyleneimine type, polybutadiene type, organic titanium type anchor, etc.
Coating agent, or known anchor coating agent such as polyurethane-based, polyacrylic-based, polyester-based, epoxy-based, polyvinyl acetate-based, cellulose-based, etc. laminate adhesive, and the like Agents and the like can be used.

Next, in the present invention, the bag body constituting the retort pouch will be described. As a bag-making method, a laminate produced by using the above-mentioned materials is used and its heat seal is used. Unstretched polypropylene resin film as a flexible film
Alternatively, the two sheets are overlapped, and the peripheral end portion of the outer periphery thereof is, for example, a side seal type, a two-way seal type, a three-way seal type.
Type, four-sided seal type, envelope type seal type, gas palm type seal type
A bag-shaped body that is heat-sealed according to the heat-sealing type such as a roll type (pillow-sealing type), a pleated sealing type, a flat bottom sealing type, a square bottom sealing type, and the like. And further, at a predetermined position of the bag body, a temporary adhesive part for partitioning the bag body into two chambers is formed,
A double bag for mixing is manufactured. Other, for example,
A self-supporting packaging bag (standing pouch) is also possible.

In the above, a method of heat-sealing the peripheral portion of the outer peripheral end portion when forming the bag body and a method of heat-sealing when providing a temporary bonding portion for partitioning the bag body into two chambers. Examples of the method include bar seal, rotary roll seal, belt seal, impulse seal, high frequency seal, and ultrasonic seal.
Can be performed by a known method such as Thus, in the present invention, the peripheral portion of the outer peripheral end portion when the bag body is formed is
As the conditions for toe-sealing, the heat-sealing temperature is set to 190 to 250 at the portion of the seal portion provided around the outer peripheral end portion.
C, preferably 200 to 220 C, pressure 0.5 to 10
Kg / cm ^2, preferably, 1 to 3 kg / cm ^2, heat pressing time 0.5 to 30 seconds, preferably, heat under the condition of 1 to 3 seconds position - city - forming a pole tip - Le to be To do. On the other hand, in the present invention, as a condition for heat sealing when providing a temporary adhesive portion that divides the bag into two chambers, the temporary adhesive portion is a heat seal temperature of 150 to 190 ° C., preferably Is 165 to 175 ° C., pressure 0.5 to 5 Kg / c
m ² , preferably 1 to ² Kg / cm ² , and a heat pressurizing time of 0.5 to 10 seconds, preferably 1 to 2 seconds, to form a temporary adhesive portion by heat-sealing. is there. That is, in the present invention, as the heat seal conditions, there are a condition for heat-sealing the peripheral portion of the outer peripheral end when the bag body is constructed and a temporary adhesive portion for partitioning the bag body into two chambers. The condition of heat-sealing at the time of providing is changed, and the temporary adhesion part which is the latter is formed under conditions relaxed from the former condition, and the temporary adhesion part is
It is characterized in that it is a weak seal portion as compared with the seal portion in the peripheral portion of the outer peripheral end portion.

By the way, in the present invention, the seal shape of the seal portion provided in the peripheral portion of the outer peripheral end is as follows.
Although the seal width may be a linear shape with a width of about 3 to 15 mm,
The seal shape of the temporary adhesive portion may be a straight shape having a predetermined seal width as shown above, but may be any seal shape depending on the kind of contents to be filled and packed. By doing so, the easy peelability of the temporary adhesive portion can be adjusted, and FIGS. 6 to 8 are plan views showing a couple of seal-shaped temporary adhesive portions according to the present invention. As shown in FIG. 6, this is an example of changing the seal width of the temporary adhesive portion, which is a predetermined region of the bag body, and the left end portion and the right end portion of the peripheral portion of the outer peripheral end portion thereof,
Seal portions 5'and 5'having a line width of 5 to 15 mm are formed respectively, and a seal portion 5 "having a line width of 1 to 5 mm is formed on the other portions, and thus the seal is formed. By changing the sealing line width of the parts 5 ', 5'and the sealing part 5 "and narrowing the line width of the central sealing part 5", the sealing strength in that part Is weakened, and the temporary adhesion portion 5 is formed so as to maintain easy peelability as compared with other portions.

Alternatively, as shown in FIG. 7, the seal width of the temporary adhesive portion is changed, and a projecting seal portion is formed on the seal portion having a narrower seal width. As described above, the seal portions 5 ′ and 5 ′ having a line width of 5 to 15 mm are provided at the left end portion and the right end portion of the peripheral portion of the bag body, which are the predetermined regions, as described above. Form and, on the other part, line width 1
A seal portion 5 "having a length of -5 mm is formed, and a projecting seal portion R is further formed in the central portion of the seal portion 5".
By changing the sealing line width of the seal portions 5 ', 5'and the seal portion 5 "and narrowing the line width of the seal portion 5" at the center thereof, the seal portion 5' -The strength of the peeling is weakened to maintain the easy peeling property as compared with the other parts, and further, the starting point of the easy peeling property is held by the protruding seal portion R, and the temporary adhesive portion 5 It is what constitutes.

Further, as shown in FIG.
This is an example of changing the width of the seal and forming a plurality of projecting seal portions on the seal portion of the narrower seal width. Sealing portions 5 ', 5'having a line width of 5 to 15 mm are formed at the left end and the right end of the peripheral portion of the outer peripheral end, and the line width 1 is formed at the other portions.
To form a seal portion 5 "having a length of up to 5 mm, and further to form two projecting seal portions R and R in the central portion of the seal portion 5",
By changing the sealing line width of the seal portions 5 ', 5'and the seal portion 5 "and narrowing the line width of the central sealing portion 5", The seal strength in that portion is weakened to maintain the easy peeling property as compared with other portions, and further, the starting point of the easy peeling property is held by the protruding seal portions R, R. To form the temporary adhesion portion 5.

Regarding the temporary bonding portion 5 as described above, as a forming position thereof, as long as two chambers can be formed in the bag body and different kinds of contents can be filled and packaged, whichever of the bag body is formed. It may be formed at any position, and the sizes of the seal portions 5 ', 5'and the seal portion 5 "constituting the temporary adhesive portion 5,
The length and the like can be arbitrarily changed, and although not shown, a temporary adhesive portion can be formed in the vertical direction of the bag body. For example, the seal parts 5 ', 5'constituting the temporary adhesion part 5
And the size of the seal portion 5 "is changed, and the seal portions 5'and 5'are changed.
When the value is increased, when the temporary adhesive portion is peeled off and one of the contents contains a solid substance when the contents of another kind are mixed, the seal portion 5 ″ peels off but the seal portion 5 ′, 5'does not peel off, and as a result, the seal portions 5 ', 5'act as a barrier so that the liquid substance passes through but the solid substance does not move.

Next, in the present invention, a method of filling and packaging the contents in the bag will be described. When the bag is manufactured, for example, an unheated seal portion is provided around the outer peripheral end. To form an opening, and from the opening of the bag, for example,
Filling each chamber with different kinds of foods that can be mixed and eaten, and further heat seal the opening to form a seal portion,
After that, retort processing, that is, according to the usual method,
The retort pouch according to the present invention can be manufactured by subjecting to heat and pressure sterilization treatment.

In the above, the contents to be filled and packaged include, for example, curry, stew, spaghetti sauce.
Examples thereof include foods and drinks such as soup and tonburi soup, and the like.

[0026]

The present invention will be described more specifically with reference to the following examples. Example 1 Stretched polyethylene terephthalate film having a thickness of 12 μm, stretched nylon film having a thickness of 15 μm and thickness of 15 μm
m polyvinylidene chloride film and 70 μm thick unstretched polypropylene film were dry laminated in this order with a polyurethane adhesive to produce a laminate having the following constitution. Stretched polyethylene terephthalate film / Adhesive layer / Stretched nylon film /
Adhesive layer / Polyvinylidene chloride film / Adhesive layer / Unstretched polypropylene film The above unstretched polypropylene film uses a composition containing 17 parts by weight of isoprene rubber to 100 parts by weight of ethylene-propylene block copolymer. Then, this was extruded to form a film. Next, two sheets of the above-mentioned laminated body were prepared, and the unstretched polypropylene films were laminated so as to face each other, and then the pouch size was set to 280 mm length × 150 mm width, and the peripheral portion of the outer peripheral end portion of the pouch was heated to 200 ℃, pressure 1.2Kg / c
m ² and heating / pressurizing time of 1.5 seconds, heat-sealing, leaving an opening (vertical upper and lower sides) for filling the contents,
A seal portion having a seal width of 10 mm was formed. Further, the vertical length of 280 mm of the pouch is divided into 130 mm and 150 mm, and the temperature is 170 ° C. and the pressure is 3.0 K.
Heat sealing was performed under the conditions of g / cm ² and heating / pressing time of 1.2 seconds, and the seal width of the left end portion and the right end portion was 15 mm × 30.
mm, the seal width of the other portion is set to 1 mm, and a temporary adhesive portion (see FIG. 3) is formed by connecting the seal portions at the left end portion and the right end portion thereof to produce a double-pack for mixing. did. After a while
Add the ingredient to the larger bag body of the double bag for mixing produced above.
In addition, the smaller bag is filled with the liquid, each is subjected to nitrogen flush packaging, and then the filling opening is opened under the same conditions as the heat sealing of the peripheral portion of the outer peripheral end of the pouch. To seal to form a seal, then 120 ° C x 17
The retort pouch was manufactured by performing sterilization treatment under the condition of minutes.
When the retort pouch manufactured above was pressed at 10 kg, the seal portion in the narrow portion of the temporary adhesion portion was peeled and opened, and the contents were mixed. At that time, no rupture of the bag was found in other parts of the bag.

Example 2 A retort pouch was manufactured in the same manner as in Example 1 except that the shape of the temporary adhesive portion was the same as that shown in FIG. 7 in Example 1 described above. When the retort pouch produced above was pressed at 8 kg, the protruding seal portion of the temporary adhesive portion served as a peeling starting point, and the narrow seal portion was peeled and opened, and the contents were mixed. At that time, no rupture of the bag was found in other parts of the bag.

Example 3 In Example 1 described above, the shape of the temporary adhesion portion was the same as that shown in FIG. 8, and the heat seal conditions were a temperature of 180 ° C. and a pressure of 2.0 Kg / cm. ^{2. A} retort pouch was manufactured in the same manner as in Example 1 except that the heat sealing was conducted under the condition of heating and pressing time of 0.5 seconds. When the retort pouch produced above was pressed at 8 kg, the projecting seal portion of the temporary adhesive portion and the narrow seal portion were peeled and opened, and the contents were mixed. At that time, no rupture of the bag was found in other parts of the bag. In addition, the shape of the temporary adhesion part,
Enlarge the shape of the left end and the right end and seal the other parts.
When the width was set to 1 mm and the length was set to about 30 mm, peeling was performed at the narrow seal portion of the temporary adhesion portion, and even if the mixture was opened and mixed, the peeling portion was narrow, so that the solid matter was Never moved to.

[0029]

As is apparent from the above description, the present invention provides an unstretched polypropylene resin film comprising a composition comprising ethylene-propylene copolymer as a main component and an olefin rubber component added thereto. Focusing attention, this was used as a heat seal film on the inner surface of the retort pouch, and as the heat seal condition,
When the condition for heat-sealing the peripheral portion of the outer peripheral end when forming the bag is changed and the condition for heat-sealing when providing the temporary adhesive portion that divides the bag into two chambers, the former is changed. When the latter temporary adhesion part is formed under conditions relaxed from the conditions, each chamber is sufficiently partitioned during distribution, etc., and the temporary adhesion part peels off during use so that different types of contents can be mixed. That is, it is possible to manufacture a retort pouch made of a double bag for mixing.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of a layer structure of a laminate used for manufacturing a bag body constituting a retort pouch according to the present invention.

FIG. 2 is a cross-sectional view showing an example of a layer structure of a laminate used for manufacturing a bag body constituting the retort pouch according to the present invention.

FIG. 3 is a plan view showing an example of the structure of a retort pouch according to the present invention using the laminated body shown in FIG.

FIG. 4 is a sectional view taken along line YY ′ of the retort pouch shown in FIG.

5 is a plan view showing a usage state of the retort pouch shown in FIG. 3. FIG.

FIG. 6 is a plan view showing an example of the seal shape of the temporary adhesive portion according to the present invention.

FIG. 7 is a plan view showing an example of the seal shape of the temporary adhesive portion according to the present invention.

FIG. 8 is a plan view showing an example of the seal shape of the temporary adhesive portion according to the present invention.

[Explanation of symbols]

 1 Heat Resistant Substrate Film 2 Heat Seal Film 3 Gas Barrier Film 2'Unstretched Polypropylene Resin Film 4 Seal Part 5 Temporary Adhesion Part 6 Contents 7 Contents A Laminate B B Laminate C Mix Double bag for

Claims (8)

[Claims] 1. A two-chamber structure in which a seal portion is provided in the peripheral portion of an outer peripheral end portion to form a bag body, and a temporary adhesive portion that divides the bag body into two chambers is provided, and the temporary adhesive portion divides the two chambers. Each of the different types of contents are stored, and a double bag for mixing which can mix the different types of contents by peeling off the temporary adhesive portion at the time of use,
And, the laminated body constituting the double bag is, from the outside to the inside, at least a heat-resistant substrate film and a heat-sealing film, or a heat-resistant substrate film, a gas barrier film and a heat-shielding film. A composition in which tosyl films are sequentially laminated, and as the above-described heat-seal film, ethylene-propylene copolymer is a main component, and an olefin rubber component is added to the composition. A retort pouch characterized by using a non-stretched polypropylene resin film. 2. The retort pouch according to claim 1, wherein the ethylene-propylene copolymer is an ethylene-propylene block copolymer or an ethylene-propylene random copolymer. 3. The retort pouch according to claim 1, wherein the olefin rubber component is one or more of isoprene rubber, isobutylene rubber, and ethylene-propylene rubber. 4. The composition contains 5 to 3 olefinic rubber components based on 100% by weight of ethylene-propylene copolymer.
The retort pouch according to claim 1, 2 or 3, which is a composition obtained by adding 0% by weight. 5. The retort pouch according to claim 1, 2, 3 or 4, wherein the unstretched polypropylene resin film has a thickness of 30 to 100 μm. 6. The heat seal temperature is 190 to 250 ° C. and the pressure is 0.5 at the seal portion provided on the periphery of the outer peripheral edge.
The heat-sealing is performed under the conditions of 10 to 10 kg / cm ² and a heating and pressurizing time of 0.5 to 30 seconds to form a seal portion. The retort pouch described in 5. 7. The heat seal temperature of the temporary adhesion portion is 1
The heat-sealing is performed under the conditions of 50 to 190 ° C., pressure of 0.5 to 5 Kg / cm ² , and heating and pressurizing time of 0.5 to 10 seconds to form a temporary adhesive portion. Claim 1,
The retort pouch described in 2, 3, 4, 5 or 6. 8. The heat seal shape of the temporary adhesive portion has a line width of 2 to 15 mm at the upper end portion and the lower end portion or the left end portion and the right end portion of the peripheral portion of the outer peripheral end portion of the bag body, and Line width 1
The retort pouch according to claim 1, 2, 3, 4, 5 or 7, which is formed by heat-sealing a sheet having a thickness of about 5 mm to form a temporary adhesive portion.