JP2007008485A - Manufacturing/filling method for plastic pouch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To manufacture a plastic pouch efficiently while filling the pouch with contents. <P>SOLUTION: Both edges in the width direction of a plastic film 21 are superposed so that a folded-back part 13 and a sealed part 14c on the front end of the folded-back part 13 are formed. A pillow seal 25 is made only on the front end of the superposed part 24 to form an approximate cylindrical body 26, and then, the base end of the superposed part 24 is folded while both ends of the same are fixed with an adhesive 28 to form the folded-back part 13. Then, a front end seal 31 closing the front end of the approximate cylindrical body 26 is made, which is followed by filling the approximate cylindrical body 26 with the contents 32. Subsequently, a rear seal 34 closing the rear end of the approximate cylindrical body 26 is made, and the cylindrical body 26 is cut off. In this manner, the pouch with the folded-back part 13 and its both ends 13a fixed is manufactured while filling the pouch with the contents 32, thus effective manufacturing and contents filling are carried out. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for producing and filling plastic pouches, which enables filling of contents while efficiently producing pouches suitable as containers for liquids, solids, or mixtures thereof, particularly retort foods. is there.

  A plastic pouch with a heat-sealed plastic film periphery is used as one of containers for liquids, solids, or mixtures thereof, such as retort foods and frozen foods. Often used.

  When such a plastic pouch is heated in a microwave oven, the internal pressure may increase due to water vapor generated with the heating, and the pouch may burst. Use it with a partial opening or opening a hole. Although it is necessary to take a method, it is cumbersome for consumers.

Therefore, a pouch provided with a mechanism that automatically opens when the internal pressure increases is proposed (for example, Patent Documents 1, 2, and 3).
JP 2002-249176 A JP 2003-192042 A JP 2003-170930 A

  However, if the automatic opening is not held at a high position on the pouch, the contents will spurt out or leak after the opening, so as an applicable pouch, an automatic opening mechanism is used for a standing pouch that is self-supporting. A flat pouch that is not provided or self-supporting has a problem that an auxiliary tool such as a box must be provided to keep the automatic opening at a high position.

  Therefore, the present inventors have already proposed a flat pouch-type plastic pouch that can be heated in a microwave oven as it is even if it is a flat pouch and can be kept at a high position even if it has an automatic opening, Development of a method capable of efficiently producing the pouch and filling the contents efficiently is desired.

  The present invention has been made in view of the above-mentioned problems and demands of the prior art, and an object of the present invention is to provide a plastic pouch manufacturing / filling method capable of efficiently manufacturing a plastic pouch and filling the contents. .

  That is, in the previously proposed plastic pouch, a folded portion in the width direction communicating with the inside is formed in the middle of one face material of the flat pouch, and the folded portion is expanded by internal pressure in the direction perpendicular to the width. By making the face material longer and getting up, it is possible to hold it at a high position even when it has an automatic opening.

  In this plastic pouch, in order to ensure that the automatic opening can be securely held at a high position, the folded portion is prevented from being damaged from the heat seal, and even when it is not necessary to provide the automatic opening, It turns out that it is more effective to fix the outer ends in the width direction of the folded part to the pouch so that the folded part will not get out of the way during distribution after filling, such plastic A method for efficiently producing a pouch and filling the contents has been completed. The specific configuration is as follows.

  In order to solve the above-described problems of the prior art, a plastic pouch manufacturing / filling method according to claim 1 of the present invention is provided with a folded portion in the width direction communicating with the inside of one of the front and back members, When manufacturing a plastic pouch with both ends in the width direction fixed to the front and back members and filling the contents, the both ends in the width direction of the plastic film are overlapped so that the folded portion and the seal portion at the tip thereof can be formed. After only the tip of the overlapped portion is pillow-sealed to form a substantially cylindrical body, the base end of the overlapped portion is bent and both ends are fixed to form the folded portion. It is characterized by filling the contents by performing a tip seal that closes the tip and then cutting after performing a rear end seal that closes the rear end of the substantially cylindrical body. .

  According to this plastic pouch manufacturing / filling method, a plastic pouch having a widthwise folded portion that communicates with the inside of one of the front and back members and having the widthwise ends of the folded portion fixed to the front and back members is manufactured. When filling the contents, both ends of the plastic film in the width direction are overlapped so that the folded portion and the seal portion at the tip thereof can be formed, and only the tip portion of the overlap portion is pillow sealed to form a substantially cylindrical shape. After forming the body, the base end of the overlapped portion is bent, both ends are fixed to form the folded portion, and then the tip end of the substantially cylindrical body is closed to fill the contents. The rear end of the substantially cylindrical body is closed and then cut off, and then the plastic film is overlapped with both ends in the width direction and folded back with a pillow seal. By performing the sealing of the tip, it can produce a pouch having a folded portion, by filling the contents between the tip seal and the rear seal, will also allow filling while producing pouches.

  According to a second aspect of the present invention, in addition to the structure of the first aspect, the plastic pouch is manufactured and filled by applying an adhesive before the folded portion is bent. It is characterized by the fact that it was done by

  According to this plastic pouch manufacturing / filling method, both ends of the folded portion are fixed by applying an adhesive before the overlapping portion is folded, and both ends of the folded portion are fixed by the adhesive. It can be easily done by bending after applying.

  Furthermore, the plastic pouch manufacturing / filling method according to claim 3 of the present invention includes, in addition to the structure according to claim 1, fixing both ends of the folded portion by mechanically fixing after folding the overlapping portion. It is characterized in that it is performed by welding.

  According to this method of manufacturing and filling a plastic pouch, both ends of the folded portion are fixed by bending or fixing the overlapped portion and then mechanically fixing or welding. The folded portion is then stapled or riveted. It can be easily fixed by mechanical fixing such as ultrasonic welding or ultrasonic sealing.

  According to a fourth aspect of the present invention, in the plastic pouch manufacturing / filling method, in addition to the structure according to any one of the first to third aspects, the leading end seal and the trailing end seal are arranged in the preceding substantially cylindrical shape. It is characterized in that the rear end seal of the body and the front end seal of the following substantially cylindrical body are performed simultaneously.

  According to this plastic pouch manufacturing / filling method, the leading end seal and the trailing end seal are performed simultaneously with the leading end seal of the preceding substantially cylindrical body and the leading end seal of the succeeding substantially cylindrical body. By performing the front end seal and the rear end seal at the same time, it becomes possible to manufacture efficiently with a single sealing device.

  Further, the plastic pouch manufacturing and filling method according to claim 5 of the present invention has an automatic opening which can be opened by the internal vapor pressure in the front and back members in addition to the structure according to any of claims 1 to 4. It is characterized in that it is formed.

  According to this plastic pouch manufacturing / filling method, the front and back members are formed with an automatic opening that can be opened with an internal vapor pressure. By forming the automatic opening, heating is performed in a microwave oven. Also, the increase in internal pressure can be automatically released from the opening.

  According to a sixth aspect of the present invention, in the plastic pouch manufacturing / filling method, in addition to the structure of the fifth aspect, the automatic opening portion is provided with a heat seal portion simultaneously with the seal between the front end seal and the rear end seal. After forming, the heat seal portion is formed by opening a through hole.

  According to this plastic pouch manufacturing and filling method, the automatic opening is formed by forming a heat seal portion simultaneously with the sealing of the front end seal and the rear end seal, and then forming a through hole in the heat seal portion. The automatic opening can be easily formed by forming the heat seal portion and forming the through hole simultaneously with the seal between the front end seal and the rear end seal.

  According to the method for manufacturing and filling a plastic pouch according to claim 1 of the present invention, the front and back members are provided with a folded portion in the width direction communicating with the inside of one of the front and back members, and the width direction both ends of the folded portion are connected to the front and back members. When the plastic pouch is fixed and the contents are filled, the width direction both ends of the plastic film are overlapped so that the folded portion and the seal portion at the tip thereof can be formed, and only the tip portion of the overlap portion is formed. Pillow seal to make a substantially cylindrical body, then fold the base end of the overlapped portion, fix both ends to form the folded portion, and then perform a tip seal that closes the tip of the substantially cylindrical body Since the contents are filled, and the rear end seal is closed to close the rear end of the substantially cylindrical body and then cut, the plastic film is overlapped at both ends in the width direction. -A pouch with a folded portion can be manufactured by sealing the folded portion and its tip with a seal, and a pouch can be manufactured by filling the contents between the front seal and the rear seal. However, the contents can be filled while manufacturing and filling can be performed efficiently.

  Further, according to the method for manufacturing and filling a plastic pouch according to claim 2 of the present invention, since both ends of the folded portion are fixed by applying an adhesive before folding the overlapped portion, Fixing both ends of the folded portion can be easily performed by bending after applying an adhesive.

  Furthermore, according to the method for manufacturing and filling a plastic pouch according to claim 3 of the present invention, the both ends of the folded portion are fixed by mechanical fixing or welding after the overlapping portion is folded. The folded portion can be easily fixed by mechanical fixing such as a stapler or a rivet, or welding such as an ultrasonic seal.

  According to the plastic pouch manufacturing / filling method of claim 4 of the present invention, the front end seal and the rear end seal are separated from the rear end seal of the preceding substantially cylindrical body and the subsequent substantially cylindrical shape. Since the front end seal and the rear end seal are performed at the same time, it is possible to efficiently manufacture and fill with one seal device by performing the front end seal and the rear end seal simultaneously.

  Furthermore, according to the method for manufacturing and filling the plastic pouch according to claim 5 of the present invention, the automatic opening is formed in the front and back members because the automatic opening that can be opened with the internal vapor pressure is formed. Therefore, even if it heats with a microwave oven, the raise of an internal pressure can be automatically escaped from an opening part.

  According to the method for manufacturing and filling a plastic pouch according to claim 6 of the present invention, after the automatic opening is formed at the same time as the sealing of the front end seal and the rear end seal, Since the through hole is formed in the seal part, the automatic opening can be easily formed by forming the through hole by forming the heat seal part simultaneously with the seal of the front end seal and the rear end seal. Can do.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
First, a plastic pouch to which the plastic pouch manufacturing and filling method of the present invention is applied will be described with reference to FIG.

  2A is a perspective view of a film material, FIG. 2B is a bottom view in an assembled state, and FIG. 2C is a perspective view in a heating state in a microwave oven.

  For example, as shown in FIG. 2, the latch pouch 10 is a vertically long flat pouch that has a long side in the vertical direction and a short side in the horizontal direction. Here, the width direction is the short side direction. It becomes parallel with.

  This plastic pouch 10 is composed of a film material 11, and a folded portion 13 in the width direction is provided at an intermediate portion of the film material 11, and the film material 11 is substantially Z in the middle of the width direction (in the longitudinal direction of the film material 11). It is formed by folding in a letter shape, and is heat-sealed by a tip seal 14 a at the peripheral edge and a seal part 14 c of the folded part 13 to form a seal part 14.

  Further, in the plastic pouch 10, both ends 13 a in the width direction outside the seal portion 14 of the folded portion 13 are fixed to the film material 11.

  In addition, an automatic opening 16 that automatically opens with an increase in internal pressure is formed as a through hole that penetrates the heat seal portion 17 as necessary, for example, when a pouch is filled with contents that need to be heated in a microwave oven. The seal portion 17 is formed separately from the heat seal portion 14 at the periphery of the pouch, and the automatic opening portion 16 is formed in this portion.

  In such a plastic pouch 10, a folded portion 13 in the width direction communicating with the inside is formed in the middle of the film material 11 of the flat pouch. By raising the length of the material 11, even when the automatic opening 16 is provided, it can be held at a high position (see FIG. 2C).

  Next, a manufacturing and filling method for filling the contents together with the manufacturing of the plastic pouch 10 will be described with reference to FIG.

  In this manufacturing / filling method, as shown in FIG. 1, the plastic pouch 10 described in FIG. 2 is continuously fed with the long side up and down and the short side left and right. The folded portion 13 is formed along the feed direction.

  In this manufacturing / filling method, as shown in FIG. 1, the plastic film laminate 21 whose inner surface has thermal adhesiveness is rewound and guided to a former 23 through a plurality of feeding rolls 22, and passes through the former 23. Between the two sides of the film are overlapped with each other, and the overlapping portion 24 is formed.

  The overlapping portion 24 is bent at the base end in a later step. The length L from the base end of the bending is as shown in FIG. 1B, and the folded portion 13 of the plastic pouch 10 is as shown in FIG. The length L1 and the length L2 of the seal portion 14c necessary for closing and sealing the tip of the folded portion 13 required in this manufacturing process are added, and the overlap in the case of normal pillow packaging Compared with the length of the portion, the folded portion 13 is overlapped by a length L1.

  When the overlapping portion 24 is sent to the pillow seal device 25, only the tip of the overlapping portion 24 is pillow-sealed to form a continuous substantially cylindrical body 26.

  After that, at the overlapping portion 24 of the substantially cylindrical body 26, the adhesive coating device 27 is used as an adhesive 28 at both ends 13a of the folded portion 13 of the plastic pouch 10 that is bent from its proximal end in the subsequent step. For example, hot melt is applied. Here, the adhesive 28 is applied with an interval corresponding to the width of the plastic pouch 10 in use.

  Thereafter, the overlapping portion 24 of the substantially cylindrical body 26 is sent and pressed by the presser roll 29 so that the application surface of the adhesive 28 is bent inward from the base end thereof, whereby both ends 13a of the folded portion 13 are bonded and fixed. Is done.

  In this way, after the continuous substantially cylindrical body 26 having the folded portion 13 and the both ends 13a thereof fixed is formed, the front end of the substantially cylindrical body 26 is subjected to a front end seal 31 by the heat seal device 30, and a plastic pouch is formed. One of the ten tip seals 14a.

  After that, after the content 32 is filled with the content filling device 33 inside the substantially cylindrical body 26 whose tip is closed by the tip seal 31, the rear end of the substantially cylindrical body 26 is the heat seal device 30. Thus, the rear end seal 34 is made and the other end seal 14a of the plastic pouch 10 is made, and the plastic pouch 10 is sealed in a state where the contents are filled.

  Thereafter, the cutter unit 35 is cut behind the rear end seal 34 to be cut into individual plastic pouches 10.

  In addition, when manufacturing such a continuous plastic pouch 10 and filling the contents, the rear end seal 34 of the preceding plastic pouch 10 and the front end seal 31 of the subsequent plastic pouch 10 are the same heat seal. It is performed simultaneously with the device 30.

  In the plastic pouch 10, an automatic opening 16 that can be opened by the vapor pressure inside the pouch 10 is formed in the plastic film laminate 21. Simultaneously with the sealing of the front end seal 31 and the rear end seal 34. After the heat seal portion 17 is formed by the heat seal device 30, a through hole is opened in the heat seal portion 17 by the punch device 36 to form the automatic opening portion 16.

  As a result, by forming the automatic opening 16, the increase in internal pressure can be automatically released from the opening 16 even when heated by a microwave oven.

  As described above in detail, according to the method of manufacturing and filling the plastic pouch, the both edges in the width direction of the plastic film 21 are overlapped and the folded portion 13 and the seal portion 14c at the tip thereof are formed by the pillow seal device 25. By performing the sealing, the pouch 10 having the folded portion 13 can be manufactured, and further, the contents 32 are filled between the front end seal 31 and the rear end seal 34 to manufacture the plastic pouch 10. The contents 32 can be filled, and production and filling can be performed efficiently.

  Further, according to this method of manufacturing and filling the plastic pouch, the both ends 13a of the folded portion 13 are fixed by applying the adhesive 28 before the overlapping portion 24 is folded. The fixing of 13a can be easily performed by applying the adhesive 28 and then bending it.

  Furthermore, according to this plastic pouch manufacturing / filling method, the leading end seal 31 and the trailing end seal 34 are connected to the leading end seal 34 of the preceding substantially cylindrical body 26 and the leading end seal 31 of the succeeding substantially cylindrical body 26. Can be manufactured and filled efficiently with a single heat seal device 30.

  In addition, according to the method for manufacturing and filling the plastic pouch, since the automatic opening 16 that can be opened by the internal vapor pressure is formed in the plastic pouch 10, the internal pressure rises even when heated by a microwave oven. It can escape automatically from the opening 16.

  Furthermore, according to this method of manufacturing and filling a plastic pouch, after the automatic opening 16 is formed in the heat seal portion 17 by the heat seal device 30 simultaneously with the front end seal 31 and the rear end seal 34, Since the punch device 36 is used to form a through hole, the automatic opening 16 can be easily formed.

  In the above embodiment, both ends 13a of the folded portion 13 are fixed by the adhesive 28. However, the present invention is not limited to this, and after folding the overlapping portion 24, the both ends 13a of the folded portion 13 are folded. It may be fixed mechanically by a stapler or rivet, or may be fixed by welding such as an ultrasonic seal, and these can also be fixed easily.

It is the schematic block diagram and the elements on larger scale of the manufacturing line concerning one Embodiment of the manufacturing and filling method of the plastic pouch of this invention. 2A is a perspective view of a film material, FIG. 2B is a bottom view in an assembled state, and FIG. 2C is a perspective view in a heating state in a microwave oven.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Plastic pouch 11 Film material 13 Folding part 13a Width direction edge part 14 Heat seal part 14a End seal 14c Seal part 15 Filling port 16 Automatic opening part 17 Seal part 21 Plastic film laminated body 22 Feeding roll 23 Former 24 Overlapping part 25 Pillow Seal device 26 Substantially cylindrical body 27 Adhesive application device 28 Adhesive 29 Presser roll 30 Heat seal device 31 Front seal 32 Content 33 Content filling device 34 Rear end seal 35 Cutter unit 36 Punch device L Length of overlapped portion L1 Folded part length L2 Sealed part length

Claims (6)

When providing a plastic pouch with a width direction folded portion communicating with the inside on one side of the front and back members, and fixing the width direction both ends of the folded portion to the front and back members and filling the contents,
The both ends in the width direction of the plastic film are overlapped so that the folded portion and the seal portion at the tip thereof can be formed, and only the tip portion of the overlap portion is pillow sealed to form a substantially cylindrical body, and then the overlap is performed. The base end of the portion is bent, both ends are fixed to form the folded portion, and then the tip end of the substantially cylindrical body is closed to fill the contents, and the rear end of the substantially cylindrical body is further removed. A method for producing and filling a plastic pouch, characterized in that the rear end is closed and then cut.   2. The method of manufacturing and filling a plastic pouch according to claim 1, wherein both ends of the folded portion are fixed by applying an adhesive before the overlapping portion is bent.   The method of manufacturing and filling a plastic pouch according to claim 1, wherein both ends of the folded portion are fixed by mechanical fixing or welding after the overlapping portion is bent.   4. The front end seal and the rear end seal are configured to simultaneously perform a rear end seal of the preceding substantially cylindrical body and a front end seal of the succeeding substantially cylindrical body. A method for producing and filling a plastic pouch according to any one of the above.   5. The plastic pouch manufacturing / filling method according to claim 1, wherein an automatic opening that can be opened by an internal vapor pressure is formed in the front and back members. 6. The automatic opening portion is formed by forming a heat seal portion at the same time as the sealing of the front end seal and the rear end seal, and then forming a through hole in the heat seal portion. Manufacturing and filling method of the described plastic pouch.

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