JP2014069888A - Retort pouch, and method for manufacturing retort pouch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a retort pouch which is not blotted at a zipper before opened but can be quickly filled with contents and which has no content leaked.SOLUTION: A zipper 15 for refilling a cooking liquid Q is fixed by a heat seal on the inner sides of the upper portions of side surface films 11A and 11B, and an easy peel portion 14 for further sealing the cooking liquid Q and preventing the cooking liquid Q from adhering to the zipper 15 is disposed continuously to the zipper 15. The cooking liquid Q is charged with the zipper 15 being opened, and the easy peel portion 14 is then heat-sealed.

Description

  The present invention includes a pair of side films and a zipper for resealing the contents, and seals the contents and continuously has an easy peel portion for preventing the contents from adhering to the zipper. It is related with the retort pouch which can be provided independently, or the retort pouch which provided the spout in the bottom part. Furthermore, it is related with those manufacturing methods. In particular, the present invention relates to a retort pouch that cannot be filled with contents from the bottom and a method for manufacturing the same.

  A conventional pouch includes a pair of rectangular side films and a zipper for resealing contents such as food. This zipper is fixed to the upper inner side of the pair of side films by heat sealing. A pair of rectangular side films are overlapped, and four sides (both sides, bottom side, top side) are joined by heat sealing. Here, an unsealed portion that is not heat-sealed is formed on a part of one side. Thereafter, the contents are filled from the unsealed portion, and the unsealed portion is heat sealed.

JP-A-8-198280

  However, when a pouch having such a configuration is used for a retort food, when the pouch is filled with the retort food as the contents and sterilized by retort, the heated retort food may adhere and contaminate the zipper. . Also, some pressing force may be applied to the side of the pouch to open the zipper, and the retort food may adhere to the zipper. For this reason, it has become a factor that reduces the value of the product, such as dirty hands when opened or poor appearance. The problem regarding the appearance was particularly remarkable when the retort pouch was formed of a transparent film. In order to solve such a problem, it is conceivable to provide a protective film (easy peel film) for protecting the zipper. However, even if a protective film is provided on the pouch of Patent Document 1 to solve the above problems, there are the following problems. That is, in Patent Document 1, since the pouch is turned sideways when filling the retort food, the nozzle cannot be inserted deeply into the pouch. For this reason, if the pouch is filled with the retort food from the nozzle at a high speed, the retort food may overflow from the opening of the pouch, the filling speed cannot be increased, and manufacturing time is required. In addition, when filling, the unsealed part is mechanically expanded to form an opening, and after filling, the unsealed part is aligned again and heat sealed, so the two sides of the side films cannot be accurately aligned. There was also a risk that the retort food would leak due to insufficient bonding.

  Accordingly, an object of the present invention is to provide a retort pouch in which the zipper is not soiled before opening, the contents can be filled quickly, and the contents do not leak.

For this reason, the invention described in claim 1 includes a pair of side surface portions,
A bottom surface portion provided continuously on the pair of side surface portions;
With a zipper to reseal the contents,
In the self-supporting retort pouch in which the zipper is joined to the inside of the pair of side portions by heat sealing,
The zipper is provided so that a male part and a female part can be engaged,
The male part and the female part are supported by different pedestal parts,
A retort pouch that heat seals the pedestal part of the male part to the inside of the one side part, and heat seals the pedestal part of the female part to the inside of the other side part,
An easy peel part that seals the contents and prevents the contents from adhering to the zipper,
A retort pouch comprising the easy peel portion continuously on the pedestal portion of the male portion or the pedestal portion of the female portion,
Open the zipper by disengaging the male part and the female part, filling the contents,
after that,
When the easy peel part is continuously provided on the pedestal part of the male part, the easy peel part is heat sealed to the side part on the female part side below the zipper,
When the easy peel part is continuously provided on the pedestal part of the female part, the easy peel part is heat sealed to the side part on the male part side below the zipper,
The upper ends of the pair of side surfaces are heat sealed.

  A second aspect of the present invention is the retort pouch according to the first aspect, wherein a heat-sealed portion formed by heat-sealing the easy peel portion to the side surface portion has a pointed shape toward the zipper. It is characterized by being.

  According to a third aspect of the present invention, in the retort pouch according to the first or second aspect, the zipper includes a non-sealed portion that is not heat-sealed with the side surface portion.

  According to a fourth aspect of the present invention, in the retort pouch according to the third aspect of the present invention, a plurality of the non-seal portions are arranged at intervals.

  According to a fifth aspect of the present invention, in the retort pouch according to the third or fourth aspect, the non-seal portion is formed in a bent line in a plan view.

  A sixth aspect of the present invention is the retort pouch according to any one of the first to fifth aspects, wherein the zipper is provided with a missing portion where the male portion and the female portion are not engaged.

The invention according to claim 7 is the retort pouch according to any one of claims 1 to 6,
The easy peel part is formed in a rectangular shape,
The long side of the easy peel part is arranged along the width direction of the retort pouch,
The easy peel part is provided with a heat-melting protrusion along the long side,
The easy peel portion and the side surface portion are heat-sealed through the protrusion.

The invention according to claim 8 is the retort pouch according to claims 1 to 7,
The pair of side surface portions and the easy peel portion are formed of a transparent material.

  A ninth aspect of the present invention is the retort pouch according to any one of the first to eighth aspects, wherein the retort pouch is inside the pair of side surface portions, and an upper end of the pair of side surface portions and the easy peel portion. It is characterized by providing moisture between the two.

The invention according to claim 10 includes a pair of side surface portions,
A bottom surface portion provided continuously on the pair of side surface portions;
With a zipper to reseal the contents,
In the method for producing a self-supporting retort pouch in which the zipper is joined to the inside of the pair of side surfaces by heat sealing,
The zipper is provided so that a male part and a female part can be engaged,
The male part and the female part are supported by different pedestal parts,
A heat resealing pouch that heat seals the pedestal part of the male part to the inside of one of the side parts, and heat seals the pedestal part of the female part to the inside of the other side part,
An easy peel part that seals the contents and prevents the contents from adhering to the zipper,
The easy peel part is continuously provided on the base part of the male part or the base part of the female part,
The easy peel part is formed in a rectangular shape, and the long side of the easy peel part is arranged along the width direction of the retort pouch,
A method for producing a retort pouch comprising a heat-meltable protrusion along the long side of the easy peel part,
Open the zipper by disengaging the male part and the female part, filling the contents,
after that,
When the easy peel part is continuously provided on the pedestal part of the male part, the easy peel part is heat-sealed through the protrusion on the side part on the female part side below the zipper,
When the easy peel part is continuously provided on the pedestal part of the female part, the easy peel part is heat sealed to the side part on the male part side below the zipper via the protrusion,
The upper ends of the pair of side surfaces are heat sealed.

The invention according to claim 11 is a pair of side portions,
A bottom surface portion provided continuously on the pair of side surface portions;
With a zipper to reseal the contents,
In the method for producing a self-supporting retort pouch in which the zipper is joined to the inside of the pair of side surfaces by heat sealing,
The zipper is provided so that a male part and a female part can be engaged,
The male part and the female part are supported by different pedestal parts,
A heat resealing pouch that heat seals the pedestal part of the male part to the inside of one of the side parts, and heat seals the pedestal part of the female part to the inside of the other side part,
An easy peel part that seals the contents and prevents the contents from adhering to the zipper,
A method for producing a retort pouch comprising the easy peel part continuously on the pedestal part of the male part or the pedestal part of the female part,
Open the zipper by disengaging the male part and the female part, filling the contents,
after that,
Applying ultrasonic vibration to the easy peel part,
further,
When the easy peel part is continuously provided on the pedestal part of the male part, the easy peel part is heat sealed to the side part on the female part side below the zipper,
When the easy peel part is continuously provided on the pedestal part of the female part, the easy peel part is heat sealed to the side part on the male part side below the zipper,
The upper ends of the pair of side surfaces are heat sealed.

  According to the first aspect of the present invention, the apparatus includes a pair of side surfaces, a bottom surface continuously provided on the pair of side surfaces, and a zipper for resealing contents, the zipper being the pair. In the self-supporting retort pouch joined to the inside of the side surface of the side by heat sealing, the zipper is provided so that the male part and the female part can be engaged, and the male part and the female part are supported by different pedestal parts, A retort pouch that heat seals the pedestal part of the male part to the inside of the one side part and heat seals the pedestal part of the female part to the inside of the other side part, and seals the contents. And an easy peel portion that prevents the contents from adhering to the zipper, and the easy peel portion is connected to the pedestal portion of the male portion or the pedestal portion of the female portion. A retort pouch provided with the male part and the female part disengaged, the zipper opened, filled with the contents, and then the easy peel part continuously to the pedestal part of the male part When providing, heat-sealing the easy peel part to the side part on the female part side below the zipper, and when providing the easy peel part continuously to the pedestal part of the female part, the easy peel part Is heat-sealed on the side part on the male part side below the zipper, and the upper ends of the pair of side parts are heat-sealed.

  Therefore, since there is an easy peel portion, the contents are prevented from adhering to the zipper before opening, and the hands are not soiled at the time of opening and the appearance is not bad. Further, when filling the contents, the retort pouch is self-supporting and the zipper is opened to form the opening, and then the contents are filled. Therefore, the opening for filling can be widened. Furthermore, since the upper end of the side surface portion and the easy peel portion are heat-sealed after filling, the openings formed for filling the contents can be heat-sealed at once, and the joining can be performed sufficiently. For this reason, the leakage of the contents resulting from insufficient heat sealing can be prevented. Therefore, a retort pouch can be provided in which the zipper is not soiled before opening, the contents can be filled quickly, and the contents do not leak.

  Moreover, since it can stand on its own, it can be displayed at the store in an upright state. This eliminates the need for an outer box for standing and displaying. Moreover, since opening becomes upward by making it stand independently, when throwing ingredients etc. into a retort pouch and cooking, it is easy to work.

  According to invention of Claim 2, since the heat seal part formed by heat-sealing the said easy peel part to the said side part is the waveform of the shape sharpened toward the said zipper, Easy opening.

  According to invention of Claim 3, since the said zipper is provided with the non-seal part which is not heat-sealed with the said side part, when the retort pouch is reheated, the inside of a pouch is heated by the content being heated. When the pressure becomes high, the non-sealed portion is degassed, and the pouch can be prevented from rupturing from the zipper.

  According to the fourth aspect of the present invention, since a plurality of the non-seal parts are arranged at intervals, the pressure in the pouch can be reduced through the plurality of non-seal parts, and the pressure inside the pouch is more uniform. Can be held in.

  According to the invention described in claim 5, since the non-seal portion is formed in a bent line in plan view, the internal pressure of the pouch can be set to a desired value according to the shape of the non-seal portion. It becomes easy. That is, if the non-sealed part is formed in the shape of a hook with a sharp bent part, the steam in the pouch is difficult to escape to the outside, and if the non-seal part is formed in a bent line that is closer to a straight line, the steam in the pouch is released to the outside. It becomes easy.

  According to invention of Claim 6, since the said zipper is provided with the missing part which the said male part and the said female part do not engage, when a retort pouch is reheated etc. When the inside of the pouch is at high temperature and pressure, it is possible to prevent the missing portion from removing steam and rupturing the pouch from the zipper.

  According to invention of Claim 7, the said easy peel part is formed in a rectangle, arrange | positions the long side of this easy peel part along the width direction of the said retort pouch, and follows the long side to the said easy peel part The heat-peeling protrusion is provided, and the easy peel part and the side part are heat-sealed through the protrusion.

  For this reason, even if the contents adhere to the easy peel part when filling the contents, the protrusions are heat-melted unevenly at the place where the contents adhered when heat sealing, and the heat seal is incomplete. It can be confirmed that there is. Therefore, it is possible to easily detect a defective product in which the heat seal of the easy peel portion is incomplete.

  According to the eighth aspect of the present invention, since the pair of side surface portions and the easy peel portion are formed of a transparent material, it is easy to find deposits, and thus incomplete heat sealing can be prevented.

  According to the invention described in claim 9, moisture is provided between the pair of side surface portions and between the upper ends of the pair of side surface portions and the easy peel portion.

  For this reason, after heat-sealing the upper ends of the pair of side portions, when retort sterilizing, the space between the zipper and the heat-sealed portion of the upper ends of the side portions can also be heat sterilized via water droplets. Retort pouches can be provided.

  According to the tenth aspect of the present invention, the apparatus includes a pair of side surface portions, a bottom surface portion continuously provided on the pair of side surface portions, and a zipper for resealing contents, and the zipper In the method for manufacturing a self-supporting retort pouch joined to the inside of the side surface of the stool by a heat seal, the zipper is provided so that the male part and the female part can be engaged, and the male part and the female part are respectively provided by different pedestal parts Supporting and heat-sealing the pedestal part of the male part inside one of the side parts, and a method for manufacturing a retort pouch wherein the pedestal part of the female part is heat-sealed inside the other side part, The contents include an easy peel portion that seals the contents and prevents the contents from adhering to the zipper, and the easy peel portion is the base portion of the male portion or the The easy peel part is formed in a rectangular shape, the long side of the easy peel part is disposed along the width direction of the retort pouch, and the easy peel part is along the long side. A retort pouch with a heat-melting projection, wherein the male part and the female part are disengaged, the zipper is opened, the contents are filled, and then the easy peel part is When continuously provided on the pedestal of the male part, the easy peel part is heat-sealed to the side part on the female part side below the zipper via the protrusion, and the easy peel part is attached to the female part. When the pedestal portion is continuously provided, the easy peel portion is heat sealed to the side portion on the male portion side below the zipper through the protrusion, and the upper ends of the pair of side portions are To Toshiru.

  Therefore, since there is an easy peel portion, the contents are prevented from adhering to the zipper before opening, and the hands are not soiled at the time of opening and the appearance is not bad. Further, when filling the contents, the retort pouch is self-supporting and the zipper is opened to form the opening, and then the contents are filled. Therefore, the opening for filling can be widened. Furthermore, since the upper end of the side surface portion and the easy peel portion are heat-sealed after filling, the openings formed for filling the contents can be heat-sealed at once, and the joining can be performed sufficiently. For this reason, the leakage of the contents resulting from insufficient heat sealing can be prevented. Therefore, it is possible to provide a method for producing a retort pouch that can prevent the zipper from being soiled before opening, fill the contents quickly, and prevent the contents from leaking.

  In addition, even if the contents adhere to the easy peel part when filling the contents, the protrusions are non-uniformly melted at the place where the contents are adhered when heat sealing, and the heat sealing is incomplete. I can confirm that. Therefore, it is possible to detect a defective product in which the heat peel of the easy peel portion is incomplete.

  According to an eleventh aspect of the present invention, the apparatus includes a pair of side surfaces, a bottom surface continuously provided on the pair of side surfaces, and a zipper for resealing contents, the zipper being the pair. In the manufacturing method of the self-supporting retort pouch joined to the inside of the side surface of the stool by the heat seal, the zipper is provided so that the male part and the female part can be engaged, and the male part and the female part are respectively provided by different pedestal parts. Supporting and heat-sealing the pedestal part of the male part inside one of the side parts, and a method for manufacturing a retort pouch wherein the pedestal part of the female part is heat-sealed inside the other side part, The contents include an easy peel portion that seals the contents and prevents the contents from adhering to the zipper, and the easy peel portion is the base portion of the male portion or the A retort pouch continuously provided on a pedestal part of a gas part, wherein the male part and the female part are disengaged, the zipper is opened, the contents are filled, and then the easy peel When applying the ultrasonic vibration to the part and further providing the easy peel part continuously to the pedestal part of the male part, heat the easy peel part to the side part on the female part side below the zipper. When sealing and providing the easy peel part continuously to the pedestal part of the female part, the easy peel part is heat sealed to the side part on the male part side below the zipper, and the pair of side parts Heat seal the top of the.

  Therefore, since there is an easy peel portion, the contents are prevented from adhering to the zipper before opening, and the hands are not soiled at the time of opening and the appearance is not bad. Further, when filling the contents, the retort pouch is self-supporting and the zipper is opened to form the opening, and then the contents are filled. Therefore, the opening for filling can be widened. Furthermore, since the upper end of the side surface portion and the easy peel portion are heat-sealed after filling, the openings formed for filling the contents can be heat-sealed at once, and the joining can be performed sufficiently. For this reason, the leakage of the contents resulting from insufficient heat sealing can be prevented. Therefore, it is possible to provide a method for producing a retort pouch that can prevent the zipper from being soiled before opening, fill the contents quickly, and prevent the contents from leaking.

  Moreover, even if the contents adhere to the easy peel part when filling the contents, the attached contents can be removed by ultrasonic vibration, and the easy peel part can be completely heat-sealed. Therefore, it is possible to prevent the manufacture of defective products with incomplete heat-sealing of the easy peel part.

It is a perspective view of the state where an example of the retort pouch of this invention was made to stand by itself. It is the detail drawing, (a) is AA 'sectional drawing of FIG. 1, (b) is a perspective view of a male part, (c) is a perspective view of a female part, (d) is the X direction of (a). The top view of the zipper seen from (e) is a top view for demonstrating the shape of the heat seal part formed in the easy peel part. It is a figure which shows the modification of the heat seal formed in an easy peel part. It is a top view for demonstrating the method to fill a retort pouch with the content, (a) is a figure which shows a mode that heat sealing is performed after filling the content, (a) is a content filling. It is a top view for demonstrating the method of cooking with a retort pouch, (a) is a figure which shows the state which has cut | disconnected the upper part, (b) is a figure which shows the state which has injected | thrown-in ingredients. (A)-(d) is a top view which shows the modification of a zipper. (A) is a plan view showing a modification of the zipper, (b) is a cross-sectional view taken along the line BB ′ of (a), (c) is a plan view showing another modification of the zipper, and (d) is (c). It is CC 'sectional drawing. It is a figure which shows an example of a manufacturing method, (a) is a top view of an easy peel part, (b) is D arrow sectional drawing of (a), (c) is a partial sectional view of a retort pouch, (d) And (e) is a plan view when the easy peel portion is heat-sealed. It is a top view which shows a mode when the contents have adhered to the easy peel part.

  FIG. 1 shows a perspective view of a retort pouch 10 that can be cooked in a microwave oven as an example of the retort pouch of the present invention, and FIGS. The retort pouch 10 can stand on its own and has a closed bottom. The retort pouch 10 contains a cooking liquid (not shown) (not shown).

  The retort pouch 10 includes three main constituent members, a pair of rectangular side films (side portions) 11A and 11B, and a rectangular bottom film (bottom portion) 12 that connects the side films 11A and 11B at the bottom. Is suitably heat-sealed. The bottom film 12 is heat-sealed in a state where the bottom film 12 is mountain-folded toward the inside (inside both the side films 11A and 11B) at a substantially center (note that the bottom film 12 has notches formed at both ends thereof. (A technique having such a bottom surface in a self-supporting retort pouch is disclosed in, for example, FIG. 1 of JP-A-2006-335478). Specifically, the heat seal part SHS is formed on both side ends of the side film 11A and the side film 11B with the bottom film 12 folded, and then the heat seal part BHS is formed. The heat seal part BHS is applied so that the bottom part BT is on the ship bottom. The heat seal part BHS is for assisting the self-supporting of the retort pouch 10. Moreover, the upper end of side film 11A, 11B is joined by the heat seal part UHS.

  A notch NT that assists in opening the retort pouch 10 is formed above the zipper 15 and above the heat seal portion SHS.

  In addition, the retort pouch 10 may be formed with both sides and bottom by bending one rectangular film instead of the three main constituent members of the pair of side film and bottom film.

  On the upper part of the retort pouch 10, a zipper 15 is fixed between the side films 11A and 11B. Both sides of the zipper 15 are fixed to the side films 11A and 11B by the heat seal part ZHS. Moreover, the zipper 15 is being fixed by the heat seal part SHS in the state pinched | interposed between side film 11A, 11B.

  The zipper 15 includes a male part 15B and a female part 15A. Each of the male part 15B and the female part 15A is formed so as to protrude linearly at the center of a separate pedestal part 15S (consisting of a rectangular film). The both sides of this pedestal portion 15S are heat sealed with the side film 11B across the male portion 15B to form the heat seal portion ZHS. Similarly, heat sealing part ZHS is formed by heat-sealing both sides of base part 15S with side film 11A across female part 15A.

  By the way, the heat seal part ZHS of the pedestal part 15S is continuously provided with a non-seal part 15US at one end (the non-seal part 15US is a part where the pedestal part 15S is not heat-sealed by heat sealing. Means that.) In this non-seal portion 15US, each pedestal portion 15S is not fused to the side film 11A or the side film 11B. In addition, although it is desirable that the ratio L1: L2 = 155: 30 to 40 of the heat seal part ZHS and the non-seal part 15US is not limited thereto.

  Moreover, the easy peel part 14 is provided continuously under the zipper 15. The easy peel part 14 is a resin film formed continuously with the female part 15 </ b> A constituting the zipper 15. The easy peel part 14 is joined only to the side film 11B on the male part 15B side by the wave-shaped heat seal part WHS. That is, the easy peel part 14 is for sealing the cooking liquid below the zipper 15 in order to prevent the cooking liquid in the retort pouch 10 from touching the zipper 15. The easy peel part 14 may be formed so as to be continuous with the male part 15B constituting the zipper 15 and joined only to the side film 11A on the female part 15A side by the wave-shaped heat seal part WHS. .

  In this example, the heat seal part WHS is formed narrower than the heat seal parts SHS, UHS, BHS. That is, the bonding strength is weak and it is easy to peel off. The heat seal portion WHS is formed in a wave shape that is pointed upward, and includes a top portion W1 and a bottom portion W2. That is, the top W1 is formed to be sharper than the bottom W2. The heat seal part WHS may not be formed narrower than the heat seal parts SHS, UHS, BHS. Moreover, the heat seal part WHS is not limited to being formed in a wave shape, and may be formed continuously. For example, as shown in FIG. 3, the heat seal part WHS may be linear.

  Next, a procedure for filling the cooking liquid to form the retort pouch 10 will be described with reference to FIGS. First, as shown to Fig.4 (a), in the state which does not form the heat seal part UHS which is the junction part of the upper end of side film 11A, 11B, and the heat seal part WHS of the easy peel part 14 (namely, side film) Before heat sealing the upper ends of 11A and 11B and the easy peel part 14, the male part 15B and the female part 15A of the zipper 15 are disengaged, and the cooking liquid (contents) Q is filled.

  Next, as shown in FIG. 4B, after the male portion 15B and the female portion 15A of the zipper 15 are engaged to close the zipper body 15E, the heat seal portion UHS and the heat seal portion WHS are formed. Thereafter, the retort pouch 10 is heated to sterilize the retort. On the side films 11A and 11B of the retort pouch 10, food names, cooking methods, and the like may be printed. Further, the retort pouch 10 may be stored and sold in a paper box or the like. On the surface of the paper box, food names, cooking methods, image photographs, and the like may be printed. In addition, the formation process of this retort pouch 10 does not need to be in the state where the bottom film 12 of the retort pouch 10 is down.

  In addition, about the order which forms the heat seal part UHS which is a junction part of the upper end of side film 11A, 11B, and the heat seal part WHS of the easy peel part 14 after filling with the cooking liquid Q, (1) Heat seal part The UHS and the heat seal part WHS are formed simultaneously, (2) the heat seal part WHS is formed first than the heat seal part UHS, and (3) the heat seal part UHS is formed first than the heat seal part WHS. Is mentioned. Among these, it is preferable that (2) the heat seal portion WHS is formed before the heat seal portion UHS.

  In addition, the heat seal part UHS and the heat seal part WHS may be sequentially formed with the same sealer by moving the retort pouch 10. Further, the heat seal part UHS and the heat seal part WHS may be formed simultaneously or sequentially using different sealers in a state where the retort pouch 10 is not moved.

  A method for heating and pressure cooking food using the retort pouch 10 configured as described above will be described with reference to FIGS. First, as shown to Fig.5 (a), the upper part of the retort pouch 10 is cut away from the notch NT. Then, the zipper 15 is opened. By opening the zipper 15, the easy peel portion 14 formed continuously with the zipper 15 is pulled, and the heat seal portion WHS is peeled off from the side film 11 </ b> B. At this time, since the heat seal part WHS is peeled off from the apex W1 formed at an acute angle, it is easy to start peeling, and the easy peel part 14 can be easily peeled from the side film 11B. In addition, since it is easy to start peeling, the easy peel portion 14 can be peeled from the side film 11B without being damaged.

  Next, as shown in FIG. 5B, necessary ingredients M such as vegetables are put into the cooking liquid Q in the retort pouch 10. Since the retort pouch 10 is a standing type, when the material M is inserted, the gusset formed by the bottom film 12 at the bottom of the retort pouch 10 is opened and the stability when standing is improved. Thereafter, the zipper 15 is engaged to close the opening of the retort pouch 10, and the retort pouch 10 is put in a microwave oven in a standing state and heated for a certain time.

  Since the zipper 15 is closed, the cooking liquid Q and the ingredients M are heated and the inside of the retort pouch 10 becomes a high pressure. However, the zipper 15 is provided with a non-seal part 15US, and high-temperature air (steam) in the retort pouch 10 is discharged from the gap between the non-seal part 15US and the side films 11A and 11B, and the retort pouch 10 The inside can be maintained at a constant pressure (steam venting). By providing the non-seal portion 15US, the retort pouch 10 in which the cooking liquid Q and the ingredients M are heated is swollen due to the high pressure inside, and prevents the contents from splashing and bursting from the zipper 15. Can be cooked under heat and pressure. When cooking is finished, the ingredients M and the cooking liquid Q are transferred from the retort pouch 10 to a dish or the like. In addition, since the zipper 15 is provided, it is preferable that a part of the ingredients M and the cooking liquid Q can be left and resealed.

  Here, when a handle portion having a wide seal width is formed above the heat seal portion SHS, it becomes easy to pick the retort pouch 10 that has become hot after reheating. The handle portion is formed below the zipper 15.

  The side films 11A and 11B and the bottom film 12 constituting the retort pouch 10 may be made of materials such as a transparent four-layer specification and a transparent three-layer specification. Examples of the transparent four-layer specification include transparent deposition PET / PET / ONY / CPP, PET / transparent deposition PET / ONY / CPP, and the like. Examples of the transparent three-layer specification include transparent vapor deposited PET / ONY / CPP. At this time, the thickness of the CCP is preferably 60 to 80 μm.

  By the way, although the retort pouch 10 of the above-mentioned example is a type that is provided with the cooking liquid Q and is charged with the ingredients M and cooks in a microwave oven, the present invention is not limited to this. Instead of the cooking liquid Q, the retort pouch may be provided with cooked contents (for example, hamburger, meatballs, sweet potatoes, oden, curry, stew, dried fruits, beans, salmon flakes, etc.). In this case, the contents may be reheated after the retort pouch is not reheated and the upper part of the retort pouch is opened and transferred to a deep dish or the like. In a retort pouch in which the contents are transferred to a deep dish and reheated, the zipper 15 does not need to be provided with the non-seal portion 15US.

  Even in this case, it is preferable to provide the zipper 15 because the entire contents can be left without being used up at the time of reheating. Other configurations are the same as in the above-described example. Further, the contents are filled into the retort pouch by the method shown in FIGS. 4A and 4B (in this case, the cooking liquid Q in FIG. 4 shall be read as the contents).

  In this case (when the retort pouch is not reheated), the side films 11A and 11B and the bottom film 12 constituting the retort pouch are in addition to the above-mentioned transparent four-layer specification and transparent three-layer specification, four-layer aluminum specification, three-layer Materials such as aluminum specifications are listed. Examples of the 4-layer aluminum specification include PET / ONY / AL / CPP, PET / AL / ONY / CPP, and the like. Examples of the three-layer aluminum specification include PET / AL / CPP. At this time, the thickness of the CCP is preferably 60 to 80 μm.

  4A and 4B, after filling the cooking liquid (contents) Q, the male portion 15B and the female portion 15A of the zipper 15 are engaged to close the zipper body 15E, and the heat Although the seal part UHS and the heat seal part WHS are formed, it may be as follows. That is, after filling the cooking liquid (contents) Q and before engaging the male part 15B and the female part 15A of the zipper 15, the heat seal part WHS is formed in the easy peel part 14. And after engaging the male part 15B and female part 15A of the zipper 15 and closing the zipper main body 15E, the heat seal part UHS is formed, and the retort pouch 10 is completed.

  By the way, the zipper 15 may be as shown in FIGS. In FIG. 6A, the non-seal portion 115US is formed in the center portion of the zipper 115, and both sides thereof are the heat seal portions ZHS. In FIG. 6B, a plurality of narrow non-seal parts 215US are formed in the zipper 215 at regular intervals, and a space between the non-seal part 215US and the non-seal part 215US is defined as a heat seal part ZHS. In FIG. 6 (c), the non-sealed portion 315US is formed on both sides of the zipper 315 (adjacent to the portions to be the heat seal portions SHS at both ends of the zipper 315), and between the non-sealed portion 315US and the non-sealed portion 315US. Is the heat seal part ZHS. In FIG. 6D, a plurality of narrow non-seal parts 415US are formed in the zipper 415 at regular intervals, and a space between the non-seal part 415US and the non-seal part 415US is a heat seal part ZHS. The non-seal portion 415US is formed to be bent (or bent) in a curved line or a hook shape. By forming the non-seal portion 415US in this way, it is possible to make it difficult to remove air with increased pressure in the retort pouch 10, and is suitable when cooking with relatively high pressure. By appropriately increasing / decreasing the bending angle of the non-sealed portion 415US, it is possible to make the air in the retort pouch 10 less likely to be emitted or to be easily adjusted.

  7A and 7B show a modified example of the zipper 15. The zipper body 515E of the zipper 515 is provided with a portion where the tips of the male portion 15B and the female portion 15A shown in FIG. 2 are missing (reference numeral 515S is a pedestal portion). This missing portion is referred to as a missing portion BK, and a plurality of missing portions BK are provided at regular intervals. Moreover, each missing part BK is formed with the same width. The missing part BK is provided with a male part 515B ′ and a female part 515A ′ from which the respective leading ends are missing. For this reason, male part 515B 'and female part 515A' cannot be engaged. The zipper body 515E other than the missing part BK has the same shape as the zipper body 15E shown in FIG. Note that the plurality of missing portions BK may not be formed at regular intervals along the zipper body 515E. Moreover, each missing part BK does not need to be formed with the same width. In the zipper 515 of this example, the non-seal portion 15US is not formed unlike the example of FIG. Other configurations are the same as in the above-described example.

  By configuring the zipper 515 in this way, when the food is heated and pressurized with the retort pouch 10, when the cooking liquid Q and the ingredients M are heated and the inside of the retort pouch 10 becomes high pressure, the zipper 515 The high-temperature air in the retort pouch 10 is discharged through the missing part BK provided for the retort pouch 10, and the retort pouch 10 can be maintained at a constant pressure.

  7C and 7D show still another modified example of the zipper 15 (see FIG. 2). The zipper body 615E of the zipper 615 includes a plurality of missing portions BK shown in FIGS. 7A and 7B at regular intervals. Each missing part BK is formed with the same width. The missing part BK is provided with a male part 615B ′ and a female part 615A ′ from which the respective leading ends are missing. For this reason, male part 615B 'and female part 615A' cannot be engaged. The zipper body 615E other than the missing part BK has the same shape as the zipper body 15E shown in FIG. Note that the plurality of missing portions BK may not be formed at regular intervals along the zipper body 615E. Moreover, each missing part BK does not need to be formed with the same width.

  In addition, the heat seal part ZHS is not formed in the base part 615S of the position corresponding to the missing part BK, and is a non-seal part 615US. The non-sealing portions 615US are formed at regular intervals, and the respective non-sealing portions 615US are formed with the same width. Other configurations are the same as in the above-described example.

  By configuring the zipper 615 in this manner, when cooking the food with the retort pouch 10, when the cooking liquid Q and the ingredients M are heated and the inside of the retort pouch 10 becomes a high pressure, the zipper 615 is provided. The hot air in the retort pouch 10 is discharged through the missing part BK, and the retort pouch 10 can be maintained at a constant pressure. Furthermore, since a plurality of non-seal parts 615US are also formed, the high-temperature and high-pressure air in the retort pouch 10 is discharged even if it passes through the non-seal part 615US. Thus, the zipper 615 can more easily discharge the air in the retort pouch 10 than the zipper 515.

  Here, the plurality of missing portions BK may not be formed at regular intervals along the zipper body 615E. Moreover, each missing part BK does not need to be formed with the same width. Further, the plurality of non-seal portions 615US may not be formed at regular intervals along the zipper body 615E. Further, each non-sealed portion 615US may not be formed with the same width. Further, the non-sealed portion 615US is not limited to being formed at a position corresponding to the missing portion BK.

  4B, after engaging the male portion 15B and the female portion 15A of the zipper 15 and closing the zipper body 15E, the inner side of the side films 11A and 11B and more than the zipper 15 A water droplet may be poured into the upper side, and then the heat seal part UHS and the heat seal part WHS may be formed to complete the retort pouch 10. In this way, when retort sterilization, the inside of the side films 11A and 11B and between the zipper 15 and the heat seal part UHS can be heat sterilized via water droplets, and a sanitary retort pouch can be obtained. Can be provided.

  As another method, after the cooking liquid (contents) Q is filled in FIG. 4A, the easy peel portion 14 is heat sealed before the male portion 15B and the female portion 15A of the zipper 15 are engaged. The part WHS is formed. Then, water drops are injected into the inside of the side films 11A and 11B and above the zipper 15, and inside the side films 11A and 11B and between the zipper 15 and the easy peel portion 14. Also put water droplets on. Thereafter, the male portion 15B and the female portion 15A of the zipper 15 are engaged to close the zipper body 15E, and then the heat seal portion UHS is formed to complete the retort pouch 10. In this way, when retort sterilization, in addition to the inside of the side films 11A and 11B and between the zipper 15 and the heat seal portion UHS, the inside of the side films 11A and 11B and the zipper Between 15 and the easy peel part 14 can also be heat-sterilized via water droplets, and a more sanitary retort pouch can be provided.

  The present invention is characterized in that the zipper 15 of the retort pouch 10 is opened to fill the cooking liquid (contents) Q, and the upper end of the retort pouch 10 and the easy peel part 14 are joined by heat sealing after filling. Therefore, when the male part 15B and the female part 15A of the zipper 15 are disengaged to form an opening, and the cooking liquid Q is filled into the retort pouch 10 through this opening, the cooking liquid Q is an easy peel part. 14 and the easy peel portion 14 may be incompletely heat sealed.

  The following three methods can be considered for this. In the first method, the side film 11B and the easy peel 14 are made of a transparent film, and after the easy peel portion 14 is heat-sealed, it is determined whether or not the colored cooking liquid Q is attached by image inspection or the like. To do.

  In the second method, a step of applying ultrasonic vibration to the easy peel portion 14 is provided between the step of filling the cooking liquid Q and the step of heat sealing the easy peel portion 14. By doing in this way, before heat-sealing the easy peel part 14, the cooking liquid Q adhering to the easy peel part 14 can be removed by ultrasonic vibration, and the easy peel part 14 can be completely heat-sealed. .

  In the third method, as shown in FIGS. 8A and 8B, a linear protrusion (protrusion) 14P is provided on the easy peel portion 14 ′. The linear protrusion 14P is a protrusion made of an opaque resin having a width w (preferably about 2 mm) (the linear protrusion 14P may be formed of a transparent resin). The linear protrusion 14P is linearly formed along the length direction of the easy peel film 14B formed of a rectangular transparent film. The linear protrusion 14P is formed at the central portion of the outer surface (side film 11B side) of the easy peel film 14B (the linear protrusion 14P may be anywhere on the outer surface of the easy peel film 14B, not the central portion. It is good.) In this example, the side films 11A and 11B are also formed of a see-through film, but the present invention is not limited to this.

  After the easy peel part 14 'is filled with the cooking liquid Q, the upper end of the retort pouch 10 is heat sealed to form the heat seal part UHS, and the linear protrusion 14P of the easy peel part 14' is heat sealed. Then, the heat seal part WHS is formed. The width w of the linear protrusion 14P is pressed while being melted by heat sealing to become a linear protrusion 14P ′ having a width wA (w <wA: preferably about 4 mm) (FIGS. 8C to 8E). )).

  At this time, if the cooking liquid Q or the like is attached to the easy peel portion 14 ', the linear protrusion 14P is incompletely heat-sealed at a portion where the cooking liquid Q is present as shown in FIG. An incompletely melted portion DF is generated in the portion WHS. Accordingly, the incompletely melted portion DF of the heat seal portion WHS can be confirmed by image inspection or the like, and is excluded from the shipped product as a defective product.

  The present invention is not limited to the above-described example, and can be applied to a retort pouch composed of all materials.

10 Retort pouch 11A, 11B Side film (side part)
12 Bottom film (bottom part)
14, 14 'Easy peel part 14B Easy peel film 14P Linear protrusion (protrusion)
15, 115, 215, 315, 415, 515, 615 Zipper 15US, 115US, 215US, 315US, 415US, 615US Non-sealed part BK missing part DF incompletely melted part Q Cooking liquid (contents)
WHS heat seal part (heat seal part formed in easy peel part)

Claims (11)

A pair of side portions;
A bottom surface portion provided continuously on the pair of side surface portions;
With a zipper to reseal the contents,
In the self-supporting retort pouch in which the zipper is joined to the inside of the pair of side portions by heat sealing,
The zipper is provided so that a male part and a female part can be engaged,
The male part and the female part are supported by different pedestal parts,
A retort pouch that heat seals the pedestal part of the male part to the inside of the one side part, and heat seals the pedestal part of the female part to the inside of the other side part,
An easy peel part that seals the contents and prevents the contents from adhering to the zipper,
A retort pouch comprising the easy peel portion continuously on the pedestal portion of the male portion or the pedestal portion of the female portion,
Open the zipper by disengaging the male part and the female part, filling the contents,
after that,
When the easy peel part is continuously provided on the pedestal part of the male part, the easy peel part is heat sealed to the side part on the female part side below the zipper,
When the easy peel part is continuously provided on the pedestal part of the female part, the easy peel part is heat sealed to the side part on the male part side below the zipper,
A retort pouch characterized by heat-sealing the upper ends of the pair of side portions.   2. The retort pouch according to claim 1, wherein a heat seal portion formed by heat-sealing the easy peel portion to the side surface portion has a corrugated shape toward the zipper.   The retort pouch according to claim 1, wherein the zipper includes a non-sealed portion that is not heat-sealed with the side surface portion.   The retort pouch according to claim 3, wherein a plurality of the non-seal parts are arranged at intervals.   The retort pouch according to claim 3 or 4, wherein the non-seal portion is formed in a bending line in a plan view.   The retort pouch according to any one of claims 1 to 5, wherein the zipper is provided with a missing portion where the male portion and the female portion are not engaged. The easy peel part is formed in a rectangular shape,
The long side of the easy peel part is arranged along the width direction of the retort pouch,
The easy peel part is provided with a heat-melting protrusion along the long side,
The retort pouch according to any one of claims 1 to 6, wherein the easy peel portion and the side surface portion are heat-sealed through the protrusion.   The retort pouch according to any one of claims 1 to 7, wherein the pair of side surface portions and the easy peel portion are formed of a transparent material.   The retort according to any one of claims 1 to 8, wherein the retort is provided inside the pair of side surface portions and between the upper ends of the pair of side surface portions and the easy peel portion. Pouch. A pair of side portions;
A bottom surface portion provided continuously on the pair of side surface portions;
With a zipper to reseal the contents,
In the method for producing a self-supporting retort pouch in which the zipper is joined to the inside of the pair of side surfaces by heat sealing,
The zipper is provided so that a male part and a female part can be engaged,
The male part and the female part are supported by different pedestal parts,
A heat resealing pouch that heat seals the pedestal part of the male part to the inside of one of the side parts, and heat seals the pedestal part of the female part to the inside of the other side part,
An easy peel part that seals the contents and prevents the contents from adhering to the zipper,
The easy peel part is continuously provided on the base part of the male part or the base part of the female part,
The easy peel part is formed in a rectangular shape, and the long side of the easy peel part is arranged along the width direction of the retort pouch,
A method for producing a retort pouch comprising a heat-meltable protrusion along the long side of the easy peel part,
Open the zipper by disengaging the male part and the female part, filling the contents,
after that,
When the easy peel part is continuously provided on the pedestal part of the male part, the easy peel part is heat-sealed through the protrusion on the side part on the female part side below the zipper,
When the easy peel part is continuously provided on the pedestal part of the female part, the easy peel part is heat sealed to the side part on the male part side below the zipper via the protrusion,
A method for producing a retort pouch, wherein the upper ends of the pair of side surface portions are heat-sealed. A pair of side portions;
A bottom surface portion provided continuously on the pair of side surface portions;
With a zipper to reseal the contents,
In the method for producing a self-supporting retort pouch in which the zipper is joined to the inside of the pair of side surfaces by heat sealing,
The zipper is provided so that a male part and a female part can be engaged,
The male part and the female part are supported by different pedestal parts,
A heat resealing pouch that heat seals the pedestal part of the male part to the inside of one of the side parts, and heat seals the pedestal part of the female part to the inside of the other side part,
An easy peel part that seals the contents and prevents the contents from adhering to the zipper,
A method for producing a retort pouch comprising the easy peel part continuously on the pedestal part of the male part or the pedestal part of the female part,
Open the zipper by disengaging the male part and the female part, filling the contents,
after that,
Applying ultrasonic vibration to the easy peel part,
further,
When the easy peel part is continuously provided on the pedestal part of the male part, the easy peel part is heat sealed to the side part on the female part side below the zipper,
When the easy peel part is continuously provided on the pedestal part of the female part, the easy peel part is heat sealed to the side part on the male part side below the zipper,
A method for producing a retort pouch, wherein the upper ends of the pair of side surface portions are heat-sealed.

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