JPH09216664A - Retort pouch - Google Patents

Abstract

(57) [Summary] (Correction) [Problem] To improve the adhesiveness of a temporary adhesion part, divide into each chamber during distribution, etc., peel off during use, and mix different kinds of contents. It is to provide a retort pouch made of a double bag for mixing having a temporary adhesive portion that can be formed. SOLUTION: A temporary adhesive portion 5 that divides the bag into two chambers is provided, and a strong seal portion 5'having the same adhesive force as a strong seal portion 4 provided in the peripheral portion of the outer peripheral end portion, and a strong seal portion 5 '. -A weak seal portion 5 "having an adhesive strength lower than that of the seal portion, and stores different types of contents 6 and 7 in each of the two chambers partitioned by the temporary adhesive portion. A non-stretched polypropylene film having a heat seal property, which is a mixing double bag C in which a part is peeled off and contents of different types can be mixed, and a laminate constituting the double bag is composed of a composition. It is a retort pouch constructed using.

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 a plastic film, a metal foil, or a multi-layered product of these materials is packed in a bag-shaped or other shape container, the prepared food is packed, sealed by heat melting, and heat-pressurized. Initially, it was started from stuffed and sterilized curry, 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. , Has formed a new processed food field called retort food and is expected to develop. By the way, the retort food as described above is usually one in which ingredients, seasoning liquid, etc. are integrally packed and packaged, and in such a case,
During the storage, there is a problem that the seasoning liquid or the like permeates the ingredient, impairs the original taste of the ingredient, and discolors the ingredient. Therefore, in recent years, in retort foods, a three-sided seal, a four-sided seal, etc., is provided with a temporary adhesive portion and divided into two chambers, and each chamber stores different kinds of contents, and when used. A retort pouch comprising a double bag for mixing capable of mixing the different types of contents by peeling off the temporary adhesive portion has been proposed, and it has been attempted to provide a retort product excellent in taste and appearance. .

[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 the temporary adhesion part has a structure capable of peeling and mixing the contents of different kinds at the time of use. The reality is that no retort pouch having sufficient function and consisting of double bags for mixing has been proposed. 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 made of 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 periphery of the outer peripheral edge. The portion is heat-sealed to provide a strong seal portion to form a bag,
Further, the bag body is provided with a temporary adhesive section for partitioning into two chambers, and at that time, as a heat seal condition thereof, a condition for heat-sealing the peripheral portion of the outer peripheral end when the bag body is constructed. And two conditions, which are relaxed from this, are adopted, and a strong seal part having the same adhesive strength as the strong seal part provided in the peripheral part of the outer peripheral end part of the temporary adhesive part, When composed of a weak seal part having an adhesive strength inferior to that of the strong seal part, each chamber is sufficiently partitioned at the time of distribution and the like, and the temporary adhesion part is peeled off during use to separate different contents. The present invention has been completed by finding that it is possible to produce a retort pouch consisting of double bags for mixing that can be mixed.

That is, according to the present invention, a strong seal portion is provided in the peripheral portion of the outer peripheral end portion to form a bag body, and a temporary adhesive portion for dividing the bag body into two chambers is provided, and the temporary adhesive portion is further provided. Two parts, a strong seal part having the same adhesive force as the strong seal part provided in the peripheral part of the outer peripheral end, and a weak seal part having an adhesive force inferior to the strong seal part. It is composed of a seal part, and further stores different kinds of contents in each of the two chambers partitioned by the temporary adhesion part,
A double bag for mixing capable of mixing the contents of different types by peeling off the weak seal part constituting the temporary adhesive part at the time of use, and the laminated body forming the double bag is outside. From the inside to at least the heat resistant substrate film and the heat
A ethylene-propylene copolymer is used as the heat-sealable film or the heat-resistant substrate film, the gas barrier film and the heat-sealable film, which are sequentially laminated. A retort pouch characterized by comprising an unstretched polypropylene-based resin film having a heat-sealing property, which is composed of a composition containing-as a main component and an olefin-based rubber component added thereto. .

Further, according to the present invention, in the above-mentioned retort pouch, the portion of the strong seal portion provided in the peripheral portion of the outer peripheral end portion and the portion of the strong seal portion of the temporary adhesion portion are heat-sealed. 19
Formed by heat-sealing under conditions of 0 to 250 ° C., pressure of 0.5 to 10 kg / cm ² , and heating and pressurizing time of 0.5 to 30 seconds, and a portion of the temporary adhesive part of the weak seal part. A heat seal temperature of 150 to 190 ° C., a pressure of 0.5 to 5 Kg / cm ² ,
The present invention relates to a retort pouch, which is formed by heat-sealing under conditions of heating and pressing time of 0.5 to 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 plan view showing an example of a structure of a retort pouch according to the present invention using the laminated body shown in FIG. 1, and FIG. 4 is a sectional view taken along line XX ′ of the retort pouch shown in FIG. 3. First, in the present invention, as a laminate used for manufacturing a bag body constituting a retort pouch, as shown in FIG. 1, at least the heat-resistant base film 1 and the heatshed from the outside to the inside. A laminated body A in which the heat-resistant film 2 is sequentially laminated, or a laminated body B in which the heat resistant substrate film 1, the gas barrier film 3 and the heat sealable film 2 are sequentially laminated can be used. . Thus, in the present invention, in the laminate A, the laminate B, or the like as described above, the heat-sealable film 2 contains ethylene-propylene copolymer as a main component and an olefin-based rubber component. It is desirable to use an unstretched polypropylene resin film 2'having a heat-sealing property, which is composed of a composition containing

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. 2, two sheets A, A of the above-prepared laminate are prepared, and the surfaces of the unstretched polypropylene resin film 2 ′ as the heat-sealing film 2 are laminated so as to face each other. A peripheral portion of the outer peripheral edge is heat-sealed to form a strong 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. It is provided. Thus, in the present invention,
At the time of providing the above-mentioned temporary adhesive portion 5, a part of the temporary adhesive portion 5 is heat-sealed at the peripheral portion of the above-mentioned outer peripheral end portion to make a strong seal.
When the seal portion 4 is formed, the same heat-sealing condition is adopted to form the strong seal portion 5 ', while the other portion of the temporary adhesive portion 5 covers the peripheral portion of the outer peripheral end portion. -Tosile and strong-
The weak seal 5'is formed by heat-sealing under conditions relaxed from the heat-sealing conditions for forming the seal portion 4. That is, in the present invention, the temporary adhesive portion 5 is strengthened. It comprises a seal portion 5'and a weak seal portion 5 ". In the present invention, the contents 6 and 7 of different types are stored in each of the two chambers partitioned by the temporary adhesive portion 5 formed as described above,
A double bag C for mixing which is capable of mixing the contents 6 and 7 of different types by peeling off the portion of the weak seal portion 5 "constituting the temporary adhesive portion 5 at the time of use Is.

Thus, in the present invention, the double bag C for mixing 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, and the use thereof. At this time, for example, by applying pressure or the like from the outside, or by holding the portion of the temporary adhesive portion 5 in the hand and pulling it to both sides, the portion of the weak seal portion 5 ″ forming the temporary adhesive portion 5 is peeled off. Then, the contents 6 and 7 of different types stored in the two chambers are mixed, and then the retort pouch is cut by using, for example, scissors and opened to be used for food or the like. The example given above is one example of the retort pouch according to the present invention, and the present invention is not limited to this.

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 the laminates, for example, the peripheral portions of the upper and lower peripheral end portions of the laminates A and A are heat-sealed to form the seal portions 4 and 4,
Further, temporary adhesion portions 5 (5 ′, 5 ″) are formed, while the peripheral portions of the left and right outer peripheral ends of the laminates A, A are not heat-sealed but are opened as unsealed portions. Then, the opening is used as an opening for filling contents, and the two chambers are filled with different kinds of contents 6 and 7 from the right direction and the left direction, respectively, and then left and right. The unsealed portion of the provided opening is heat-sealed to form the sealed portions 4 and 4, so that the contents 6 and 7 can be packed in the two chambers.

Therefore, in the present invention, the retort pouch made of the double bag C for mixing produced as described above shows an example of its use 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. 5]. When using the retort pouch, for example, an external force is applied to peel off the weak seal portion 5 ″ forming the temporary adhesive portion 5. , The weak seal portion 5 ″ forming the temporary adhesive portion 5 is cut off, and as shown by an arrow P, the different types of contents 6 and 7 contained in the two chambers are mixed [( 2)] Then, the upper end of the double bag C is cut by using, for example, scissors, opened, and mixed. Is intended to provide for food, etc. The contents of 6,7 and transferred to a tableware was [(3) in FIG. 5]. In addition, in the figure, 4 and 5 (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 will be 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 particularly preferable to use an unstretched polypropylene resin film having a heat-sealing property among the above-mentioned heat-sealing 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, by using such an olefinic rubber component, it is mainly possible to improve the cold shock resistance of the retort product, and further, the weak seal constituting the temporary adhesive portion is obtained. It is used in order to achieve the effect of stabilizing the seal strength when the part is sealed.

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 shock resistance is lowered, and the seal strength of the weak seal portion constituting the temporary adhesive portion is not stable, which is not preferable, and 3
When the amount is 0 parts by weight or more, the seal strength of the strong seal portion forming the temporary adhesion portion, the strong seal portion around the outer peripheral edge portion, and the like is low, and the heat resistance is low, so that the fusion occurs during retort. It is not preferable because problems such as wearing occur. In the present invention, the thickness of the unstretched polypropylene film is 1
It is desired to be about 0 μm to 100 μm, preferably about 30 μm to 70 μm. Next, in the present invention, the unstretched polypropylene film as described above is heat-treated.
By using as a sealable film, a seal portion formed in the peripheral portion of the outer peripheral end portion when forming the bag body,
Advantages of adjusting the conditions for heat-sealing the temporary adhesive portion that divides the bag into two chambers and forming a good strong seal portion and a weak seal portion. Is to have.

By the way, since the retort pouch is usually exposed to severe physical and chemical conditions, strict packaging suitability is required for the packaging material constituting the retort pouch, and the deformation preventing strength, Drop impact strength, anti-pinhoe
Properties, heat resistance, sealing, quality maintenance, workability, hygiene,
Various conditions such as others are required, and for this reason, in the present invention, in addition to the above-mentioned materials, other materials satisfying the above-mentioned 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-acrylic acid. Ethyl 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
, A saponified ethylene-vinyl acetate copolymer, a fluorine-based resin, a diene-based resin, a polyacetal-based resin, a polyurethane-based resin, or any other known resin film or sheet to be used. be able to. In addition, 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 is from several μm to 300 μm.
It can be used by selecting from a range of positions. 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 the heat seal thereof 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
It can be heat-sealed according to the heat-sealing type such as roll type (pillow-sealing type), pleated sealing type, flat bottom sealing type, square bottom sealing type, etc. A bag for producing a bag is formed by forming a seal portion, and a temporary adhesive portion for partitioning the bag into two chambers is further formed at a predetermined position of the bag to produce a double bag for mixing. Is. In addition, for example, a self-supporting packaging bag (standing pouch) can be used.

In the above, a method of heat-sealing the peripheral portion of the outer peripheral end portion when constructing 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 portion of the strong seal portion provided in the peripheral portion of the outer peripheral end portion is set to the heat-sealing temperature of 190 to 250.
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, the condition for heat-sealing when providing the temporary adhesion portion that divides the bag body into two chambers is that a part of the temporary adhesion portion is the outer circumference when the bag body is formed. A heat seal is conducted under the same conditions as the heat seal for the peripheral portion of the end portion, and a strong seal portion having the same adhesive strength as the strong seal portion provided on the peripheral portion of the outer peripheral end portion is provided. The heat-seal temperature of 150 to 190 ° C.
Preferably, the temperature is 165 to 175 ° C., and the pressure is 0.5 to 5 Kg /
cm ² , preferably 1 to ² Kg / cm ² , and a heating and pressurizing time of 0.5 to 10 seconds, preferably 1 to 2 seconds, to form a weak seal portion by heat-sealing. It is a thing.
That is, in the present invention, as a heat seal condition, the peripheral portion of the outer peripheral end when the bag body is formed is the heat seal condition.
Conditions and heat-sealing conditions when providing a temporary adhesive part that divides the bag into two chambers, and a part of the latter temporary adhesive part is formed under conditions relaxed from the former conditions. Formed and weakened in comparison with the peripheral seal portion of the outer peripheral edge.
And a strong seal part under the same conditions as the heat seal condition of the peripheral part of the outer peripheral end part when the other part of the temporary adhesive part is formed into a bag body. Is formed.

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 shape of the weak seal portion forming the temporary adhesive portion may be a linear shape having a predetermined seal width as shown in the above-mentioned drawings, but it may be arbitrary depending on the kind of contents to be filled and packed. By making the seal shape, the easy peeling property of the temporary adhesive portion can be adjusted, and FIG. 6 is a plan view showing an example of the seal shape of the temporary adhesive portion according to the present invention. As shown in FIG. 6, with respect to the weak seal portion 5 ″ that constitutes the temporary adhesive portion 5, a protruding seal portion R is formed at the central portion of the weak seal portion 5 ″.
Thus, the temporary sealable portion 5 can be formed by holding the starting point of the easy peeling property by the protruding seal portion R.

Regarding the temporary bonding portion 5 as described above, as the 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, any of the bag bodies can be formed. It may be formed at a location, and the size, length, seal width, and other conditions of the strong seal portion 5'and the weak seal portion 5 "constituting the temporary adhesive portion 5 are as follows. Although not shown, a temporary adhesive portion may be formed at any position in the up-down direction, the left-right direction, etc. of the bag body, and the seal width thereof is not limited to a strong seal. In the seal portion 5'and the weak seal portion 5 ", they may be the same or different, and the length and the like may be arbitrarily changed.

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, a strong seal portion is formed at the peripheral portion of the outer peripheral end portion. An unheated seal portion is provided in a part thereof to form an opening in each of the two chambers, and a different type of food, for example, mixed and eaten from each of the two chambers through the opening of the package. Respectively, and further heat seal the opening to make a strong seal.
A retort process, that is,
The retort pouch according to the present invention can be produced by subjecting to heat and pressure sterilization treatment according to a conventional method.

In the above, the contents to be filled and packaged include, for example, a curry, a stew, and a spaghetti sauce.
Foods and drinks such as soup, tonburi soup, etc. can be mentioned.

[0025]

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 are prepared, and the unstretched polypropylene films are laminated so as to face each other, and then, as a pouch size, a width of 280 mm × a length of 150 mm is set. , Temperature 200 ℃, pressure 1.2Kg /
With a condition of cm ² and heating / pressurizing time of 1.5 seconds, heat sealing is performed with an opening for filling the contents (left and right lateral sides) left, and a strong seal with a seal width of 10 mm. Formed. Furthermore, the width 280 mm of the above pouch is divided into 130 mm and 150 mm, and the upper and lower end portions up to 30 mm are divided into 130 mm and 150 mm at a temperature of 175 ° C., a pressure of 3.0 Kg / cm ² , and a heating and pressurizing time of 1.2 seconds. Under the same conditions, a heat seal was performed to form a weak seal portion having a seal width of 1 mm, and the remaining portion was the same as the heat seal condition in which the strong seal portion was formed. With a seal width of 10 mm and a length of 120 mm, it is a strong seal.
Forming a taper part, and temporarily adhering it vertically (see FIG. 2).
To form a double bag for mixing. After that, the larger bag of the double bag for mixing produced above is filled with the ingredient, and the smaller bag is filled with the liquid through the opening of the unsealed portion, and each is packed with nitrogen flush. Then, the filling opening is heat-sealed under the same conditions as the heat-sealing of the peripheral portion of the outer peripheral end of the pouch to form a strong seal, and then 120 ° C. The retort pouch was manufactured by performing sterilization treatment under the condition of × 17 minutes. When the retort pouch produced above was pressed at 10 kg, the weak seal part of the temporary adhesion part 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. 6 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.

[0027]

As is apparent from the above description, the present invention provides an unstretched polypropylene film comprising a composition comprising ethylene-propylene copolymer as a main component and an olefin rubber component added thereto. Focusing on having a toe seal property, this is used as a heat seal film on the inner surface of the retort pouch, and the peripheral portion of the outer peripheral end is heat sealed to provide a strong seal. Part is provided to form a bag, and the bag is provided with a temporary adhesive part that divides the bag into two chambers. At that time, the heat seal condition is that the outer peripheral end of the bag is made. Adopting two conditions, that is, a condition of heat-sealing the peripheral portion and a condition of relaxing the condition, the same adhesion as the strong seal portion provided at the peripheral portion of the outer peripheral end portion with the temporary adhesive portion. Strong sealing portion having strength and weak sealing portion having inferior adhesive strength to the strong sealing portion A retort pouch consisting of a double bag for mixing, in which each chamber is sufficiently partitioned at the time of distribution and the temporary adhesive portion is peeled off at the time of use so that contents of different types can be mixed. It can be manufactured.

[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.

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

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

FIG. 6 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 4 Strong Seal Part 5 Temporary Adhesive Part 5 ′ Strong Seal Part 5 ″ Weak Seal Part 6 Contents 7 Contents A Laminated body B Laminated body C Double bag for mixing

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display location B65D 65/40 B65D 65/40 D // C08L 23/16 LCY C08L 23/16 LCY

Claims (7)

[Claims] 1. A bag is constructed by providing a strong seal part around the outer peripheral edge part, and a temporary adhesive part is provided for partitioning the bag into two chambers. It comprises a strong seal part having the same adhesive strength as the strong seal part provided in the peripheral part of the outer peripheral edge part, and a weak seal part having an adhesive strength inferior to the strong seal part. The contents of different types are stored in each of the two chambers partitioned by the temporary adhesive portion, and the weak seal portion constituting the temporary adhesive portion is peeled off at the time of use to mix the different types of contents. Consisting of a double bag for mixing to be obtained, and a laminate constituting the double bag, from the outside to the inside, at least,
A heat-resistant base film and heat-seal film, or a heat-resistant base film, a gas barrier film and a heat-seal film, which are sequentially laminated,
And as the above-mentioned heat-sealing film, ethylene-
A retort pouch characterized by using an unstretched polypropylene resin film having a heat-sealing property, which is composed of a composition comprising a propylene copolymer as a main component and an olefin rubber component added thereto. . 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. A portion of the strong seal portion provided in the peripheral portion of the outer peripheral end portion and a portion of the strong seal portion of the temporary adhesive portion are heat-sealed.
Temperature 190 ~ 250 ℃, pressure 0.5 ~ 10Kg / cm
² , heat-pressurization time 0.5-30 seconds
The above-mentioned claim 1, characterized in that
The retort pouch described in 2, 3, 4 or 5. 7. The weak seal portion of the temporary adhesive portion has a heat seal temperature of 150 to 190 ° C. and a pressure of 0.5 to 5 kg / c.
m ^2, heat under the conditions of heating pressing time 0.5 to 10 seconds - tosylate - above claim 1, characterized in that it is formed by Le,
The retort pouch described in 2, 3, 4, 5 or 6.