JP2010052832A - End surface structure and end surface processing method for laminated film applied to injection nozzle of packaging bag for food and drink - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To completely prevent an adhesive agent layer, an anchor coat layer, an ink layer, or the like from being exposed at the end surface of a laminated film applied to the injection nozzle of a packaging bag for food and drink, and to ensure sufficient safety, hygienic characteristics, or the like at all times by removing a risk of the contact of the adhesive agent layer or the like with the food and drink being a packaged object in the bag. <P>SOLUTION: The laminated film includes at least a uniaxially or biaxially stretched base film layers 8 and 9, and laminated sealant layers 10a, 10b, 11a, and 11b each holding the base film layers therebetween. The mutual sealant layers coat the portions of the adhesive agent layer and the anchor coat layer in the laminated film end surface including a base film layer end surface by carrying out fuse bonding mutually by sticking out of the end edge of the base film layer, in the end surface of the laminated film in which a nozzle base end side is used for a liquid injection nozzle for the packaging bag for the food and drink, whidh is fuse-bonded to a packaging bag body, in the state that the nozzle base end side projects into the storing space for the packaged object of the packaging bag body. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention is an end face structure of a laminated film comprising at least a uniaxial or biaxially stretched base film layer and each sealant layer laminated with the uniaxially or biaxially stretched base film layer applied to a dispensing nozzle of a food and beverage packaging bag, and It relates to the processing method. In particular, in a flexible packaging bag having a liquid pouring nozzle formed from a laminated film comprising a base film layer and respective sealant layers laminated on both sides of the base film layer, it is used between the base film layer and the sealant layer. The technique which prevents that the adhesive agent, anchor coating material, ink, etc. which are made contact with the package in-bag is proposed.

  A liquid pouring nozzle and a flexible packaging bag using the same are disclosed in, for example, Patent Document 1. In this case, the liquid pouring nozzle is composed of a uniaxially or biaxially stretched base film layer and a laminated film on both sides, each of which is laminated with the uniaxially or biaxially stretched base film layer interposed therebetween, with one sealant layer facing each other. Since each of the laminated films on the front and back sides has a base film layer and a sealant layer, an adhesive layer or an anchor coat layer is provided between the base film layer and the sealant layer. And sometimes have an ink layer for printing applied to the base film layer.

  Moreover, the packaging bag using such a liquid pouring nozzle has the outer surface of the base end portion of the liquid pouring nozzle attached to the inner surface of the packaging bag body at the side or top of the soft packaging bag body. The structure is formed by fusion bonding.

JP-A-2005-59958

  However, in this prior art, when the liquid dispensing nozzle is fused and joined to the packaging bag body, the base end side of the liquid dispensing nozzle is made to coincide with the inner edge of the fused portion of the packaging bag body, or Since it is arranged so as to protrude from the inner edge, that is, to the filling space side of the package, the liquid as the package of the soft packaging bag is, for example, the base of the liquid dispensing nozzle when dispensing it. When contacting the edge, the adhesive layer or anchor coat layer or sometimes the ink layer of the laminated film on the front and back exposed at the base edge of the liquid pouring nozzle will also contact the ink layer. There were safety and hygiene problems when the food was food or drink.

  This invention is intended to solve such problems of the prior art, and is applied to a dispensing nozzle for a food and beverage packaging bag, at least a uniaxially or biaxially stretched base film layer, End face structure of laminated film in which exposure of adhesive layer, anchor coat layer, ink layer, etc. is completely prevented at the end face of the laminated film comprising each sealant layer laminated with sandwiching it and method for treating the end face Is to provide.

  That is, the present invention is a laminated film of two front and back sides comprising at least a uniaxial or biaxially stretched base film layer and respective sealant layers laminated therebetween, or a single sheet folded in two at the center. A laminated film, wherein a peripheral portion excluding a portion serving as a nozzle base end side is fused, and a pouring channel is defined inside the film, and the nozzle base end side accommodates an article to be packaged in a packaging bag body. The sealant layers protrude from the edge of the base film layer on the end surface of the laminated film used for the liquid pouring nozzle of the packaging bag for food and beverage that is fusion bonded to the packaging bag body in a protruding state to the space. The liquid pouring of the packaging bag for food and drink is characterized by covering the adhesive layer and the anchor coat layer on the end face of the laminated film including the end face of the base film layer by fusion-bonding each other. It proposes an end face structure of the laminated film to be applied to the nozzle.

  Further, the present invention provides a laminated film of two front and back surfaces comprising at least a uniaxial or biaxially stretched base film layer and respective sealant layers laminated therebetween, or a single sheet folded in two at the center portion A laminated film, wherein a peripheral portion excluding a portion serving as a nozzle base end side is fused, and a pouring channel is defined inside the film, and the nozzle base end side accommodates an article to be packaged in a packaging bag body. A method for treating an end face of a laminated film used for a liquid pouring nozzle of a food and beverage packaging bag that is fusion-bonded to a packaging bag body in a protruding state to a space, wherein the end of the laminated film is heat-sealed. The adhesive on the end face of the laminated film including the end face of the base film layer is heated and pressed so as to be sandwiched from above and below, and the sealant layers are protruded from the end edges of the base film layers and fused together. Suggest laminate film end face processing method applied to a liquid dispensing nozzles for food packaging bag, characterized in that covering parts of or the anchor coat layer.

In the present invention, in the laminated film forming the liquid dispensing nozzle of the packaging bag for food and drink, the base film layer is sandwiched between the uniaxial or biaxially stretched base film layer by the action of an adhesive layer, an anchor coat layer, etc. The adhesive layers and anchors on the end face of the laminated film are formed by sticking the sealant layers on both the front and back sides that are laminated at the base film side of the nozzle so that they are melt-bonded to each other. Exposure of the coat layer and the like can be prevented.
Accordingly, in the present invention, the respective sealant layers laminated with the base film layer interposed therebetween are protruded from the edge of the base film layer and fused to each other. Even if it is carried out, the liquid pouring nozzle, which is integrally fused and joined to the soft packaging bag body to form a part of the soft packaging bag, is in contact with the in-bag package such as the adhesive layer and anchor coat layer. Since fear can be reliably removed, sufficient safety, hygiene, etc. can always be ensured for the food and drink that is the in-bag package.

  Here, when the base end portion of the liquid dispensing nozzle is fusion-bonded to the packaging bag body in a protruding state into the packaged article storage space of the packaging bag body, not only the nozzle base end side, It is preferable that the respective sealant layers laminated across the base film layer are mutually fused in the same manner as at the base end side over the entire protruding portion.

  By the way, the end surface treatment of the laminated film of the present invention, for example, in producing a liquid pouring nozzle, on the front and back two laminated films, or one laminated film itself folded in two at the center, When the required treatment is performed in advance, the sealant layer positioned at the side of the base film layer at the side portion of the film which will be the base end side of the liquid pouring nozzle later, for example, silicone, polytetrafluoro A heat seal plate or heat seal roll that has been subjected to a mold release treatment with ethylene or the like is used to protrude from the edge of the base film layer and melt-bond to each other, and by both of these sealant layers, an adhesive layer and an anchor coat layer If the required liquid dispensing nozzle is formed by fusion bonding, the layer is manufactured. When the liquid dispensing nozzle is joined to the packaging bag body to make a soft packaging bag, as described above, contact with the packaged items in the bag such as the adhesive layer and anchor coat layer of the liquid dispensing nozzle. The fear can be surely removed.

  And this means that a nozzle film having a large number of nozzles having shapes and dimensions corresponding to the liquid pouring nozzles is run in advance for the soft packaging bag body film that is continuously run, and The base end part is composed of a sealant layer having a lower melting point than the sealant layer on the inner surface of the nozzle. Are fused to the packaging bag body film, and then the unnecessary portion of the nozzle film is removed from the non-return nozzle and removed, and the front side film portion and the back side film portion of each nozzle are removed from both the film portions. Under the presence of a release material in between, for example, the heat sealing means as described above is integrally heated and pressurized, and each film on the front and back sides is formed at the base end of the nozzle. Parts, each sealant layer laminated sandwiching the base film layer, and so protrude from the base film layer edge fused to each other, it is also similar to the case for manufacturing the nozzle exit liquid Note.

  Moreover, in this case, the nozzle manufactured in advance is attached to the packaging bag body during the feeding run for the automatic filling and packaging of the packaging bag body film in the filling and packaging machine, and the predetermined liquid dispensing nozzle. Therefore, it is possible to manufacture the liquid dispensing nozzle more efficiently than in the case where each of the sealant layers positioned with the base film layer interposed therebetween is fused in another independent process. Can do.

  By the way, these are because the base end side of the nozzle having the shape and size corresponding to the liquid pouring nozzle is positioned in the region corresponding to the fusion part of the side or top of the soft packaging bag body, Under the presence of a release material between the front and back film parts, the film for the soft packaging bag body is heated and pressurized from the outer surface side of the film for the packaging bag body by the heat sealing means, and the outer surface of the nozzle is removed. In the fusion region of the formed flexible packaging bag main body, the film is fused to the inner surface of the packaging bag main body while securing the pouring channel, and at the base end side of the nozzle, The same applies to the case where each of the sealant layers laminated with the base film layer interposed therebetween is protruded from the edge of the base film layer and fused together to form a liquid pouring nozzle.

It is a figure which shows embodiment of the liquid extraction nozzle formed using the laminated | multilayer film which performed the end surface process of this invention. It is sectional drawing which illustrates the manufacturing process of a liquid extraction nozzle. It is an approximate line perspective view which illustrates the manufacturing method of a liquid pouring nozzle about the principal part. FIG. 4 is a cross-sectional view illustrating a post-process shown in FIG. 3. It is sectional drawing which illustrates the other manufacturing process of a liquid extraction nozzle. It is a photograph which shows the cross section of the liquid extraction nozzle fuse | fused by the process of FIG. 5 with the flexible packaging bag main body.

Hereinafter, embodiments of the present invention will be described using a liquid dispensing nozzle.
FIG. 1 is a view showing an embodiment of a liquid dispensing nozzle formed using a laminated film subjected to end face treatment of the present invention, and FIG. 1 (b) is a side view of the nozzle shown in FIG. 1 (a). It is an expanded sectional view which follows a bb line.
The hatched portion in the figure is provided on the peripheral edge of the laminated film of the front and back two sheets or one laminated film folded in two at the central part excluding the part serving as the base end side of the nozzle. The fusion-bonded portion 1 is shown, and the fusion-bonded portion 1 is formed by dividing the tip-fused portion 2 by cutting or removing the tip-fused portion 2 so as to be partitioned by the fusion-bonded portion 1. A spout can be formed at the tip of 3.

  By the way, this liquid pouring nozzle 4 has a base end portion fused and joined to the side portion of the soft packaging bag main body 5 shown by an imaginary line in FIG. Part of it.

  As shown in FIG. 1B, each of the front-side film portion 6 and the back-side film portion 7 of the liquid pouring nozzle 4 includes base film layers 8 and 9 that are uniaxially or biaxially stretched, and each base. The adhesive layers 10 and 11 having a thickness of about 3 to 8 μm or the anchor coat layer having a thickness of about 0.1 to 0.5 μm and sometimes one of the base film layers 8 and 9 are sandwiched between the films 8 and 9. It consists of the sealant layers 10a, 10b and 11a, 11b laminated on both sides of the printed layer provided on the surface, and the liquid dispensing nozzle 4 itself is provided on each of the film portions 6, 7 on the front and back sides. , Each of the sealant layers 10a, 10b and 11a, 11b laminated with the base film layers 8 and 9 sandwiched between the base film layers 8 and 9 at the base end side 4a portion of the liquid dispensing nozzle 4. In the figure, the adhesive layers 10, 11 and the like are completely covered with the sealant layers 10a, 10b and 11a, 11b by protruding from the edge positions indicated by the alternate long and short dash lines and fusing them together. is there.

  In addition, 12 in the figure is formed at the fusion-bonding portion on the lower side of the liquid pouring nozzle 4, and after the liquid or the like to be packaged is poured from the soft packaging bag 13, the packaging bag 13 A liquid draining projection for preventing the article to be packaged from flowing down to the fusion splicing portion 1 of the liquid pouring nozzle 4 and flowing down to the packaging bag body 5 side when standing up and returning is shown.

  The liquid pouring nozzle 4 configured as described above has adhesives for the respective film portions 6 and 7 on the front and back sides in the bonding state as shown in FIG. Since the layers 10, 11 and the like are all covered by the sealant layers 10a, 10b and 11a, 11b at the base end side 4a of the liquid pouring nozzle 4, the packaging bag body 5 of the liquid pouring nozzle 4 is covered. Even if the base end side 4a of the liquid pouring nozzle 4 may come into contact with the package in the flexible packaging bag 13, the adhesive layers 10, 11 and the like, When the flexible packaging bag 13 is in a standing posture, it is sufficiently prevented by the sealant layers 10a, 10b and 11a, 11b, regardless of whether the flexible packaging bag 13 is in a tilting posture during the pouring of the liquid, etc. Will be.

  Here, when the liquid pouring nozzle 4 is joined to the packaging bag main body 5 in a somewhat projecting posture of the base end portion of the packaging bag main body 5 into the packaged article storage space, the liquid pouring nozzle 4 is used. In addition to the base end side 4a of the outlet nozzle 4, not only the base end side 4a of the fusion bonded part 1 but also the base film layers 8 and 9 are protruded into the package storage space adjacent to the base end side 4a. Each of the sealant layers 10a, 10b and 11a, 11b stacked between each other is protruded from the base films 8, 9 and fusion-bonded, and the adhesive layers 10, 11 and the like are bonded to the sealant layers 10a, 10b and Covering with 11a and 11b is preferable in order to more sufficiently prevent the contact between the in-bag package and the adhesive layers 10 and 11.

  FIG. 2A is a cross-sectional view illustrating one process applied to the front and back film portions 6 and 7 for manufacturing the liquid pouring nozzle 4 as described above. Each of the films or one side of the laminated film that is folded in two at the center, which will later be the base end 4a of the liquid pouring nozzle 4, where one film portion 6, 7, with a pair of heat seal plates 21 subjected to mold release treatment with, for example, silicone, polytetrafluoroethylene or the like, and the sealant layers 10a, 10b and 11a, 11b, In the figure, the sealant layers 10a, 10b and 11a, 11b laminated with the base film layers 8 and 9 sandwiched by heating and pressing from above and below are melted and flowed together, The adhesive layers 10a, 10b and 11a, 11b protrude from the layer edges 8a, 9a of the base film layers 8, 9, and are fusion-bonded to each other. The adhesive layers 10 and 11 and the like that are exposed on the end surfaces of the front and back film portions 6 and 7 are completely covered.

  As mentioned above, although the case where the fusion-bonding part 14 which covers the adhesive bond layers 10 and 11 etc. was formed with the heat seal plate 21 which makes a pair was described, it replaces with those heat seal plates 21 and is shown with a virtual line in the figure. Thus, while using a pair of heat seal rolls 22 that have been subjected to the same release treatment, the side portions of the film portions 6 and 7 are sandwiched therebetween, and the paper surface along the side portions of the rolls 22 and Based on the relative rolling in the orthogonal direction, each of the sealant layers 10a, 10b and 11a, 11b can be heated and pressurized to form the same fusion-bonded portion 14. As compared with the case where the heat seal plate 21 is used, the fusion bonded portion 14 has an advantage that it can be formed continuously and at a high speed.

  By the way, after forming the fusion bonding part 14 covering the adhesive layers 10, 11 and the like in this way, it is composed of two laminated films on the front and back sides or one laminated film folded in two at the center. The sealant layers 10b are positioned opposite to each other at the peripheral portions except the peripheral edge 14a of the fusion splicing portion 14, where the front and back film portions 6 and 7 are the base end side 4a of the liquid pouring nozzle 4. 11b, for example, is formed by fusion bonding with the heat sealing means as described above, thereby forming the liquid dispensing nozzle 4 in which the required dispensing flow path 3 is partitioned.

  FIG. 3 is a schematic perspective view illustrating another manufacturing method of the liquid pouring nozzle 4 with respect to the main part thereof. This is a two-layer laminated film or a laminated film folded at the center. The sealant layers 10b and 11b of the front surface side film portion 6 and the back surface side film portion 7 that are opposed to each other are appropriately heat-sealed at the peripheral portion excluding the side portion that is the base end side 4a of the nozzle. For a flexible packaging bag body that is continuously run at a constant speed, a nozzle film 16 that is formed by fusion bonding by means or the like and is formed in advance with a number of nozzles 15 having shapes and dimensions substantially corresponding to the liquid pouring nozzle 4. The film 23 is fed to the film 23 at a predetermined speed, and the timing at which each nozzle 15 reaches the pressure roll 25 positioned opposite to the heat roll 24 is measured. 25 is moved forward and displaced with respect to the heat roll 24, and the base end side of the nozzle 15 is soft packaged by, for example, the sealant layer 11a on the outer surface of the back surface side film portion 7 while the both films 16 and 23 are traveling at a constant speed. The sealant layer on the inner surface of the main body film 23 is heat-sealed on one side of the film 23, and the nozzle 15 is fused and joined to the soft packaging bag main body film 23. Under the action of the separation film 26, it is cut off and removed along the tear induction fold formed around the nozzle 15.

  On the other hand, with respect to the nozzle 15 fusion-bonded to the flexible packaging bag body film 23, for example, an unnecessary portion of the nozzle film 16 is separated and removed, and then immediately illustrated in FIG. Thus, each of the front surface side film portion 6 and the rear surface side film portion 7 of the nozzle 15 is heated with a release material 27 such as silicone rubber or polytetrafluoroethylene interposed between the two film portions. A heat sealing means such as a seal plate 21 and a heat seal roll 22 integrally heat and pressurize the film including the soft packaging bag body film 23, and each film portion 6 on the front and back sides at the base end side 15 a of the nozzle 15. 7, each of the sealant layers 10 a, 10 b and 11 a, 11 b laminated with the base film layers 8, 9 sandwiched therebetween, as shown in FIG. The predetermined liquid pouring nozzle is formed by protruding from the layer edge 8a, 9a and fusion-bonding to each other. 4 is configured.

  By the way, for the liquid pouring nozzle 4 manufactured in this way, the flexible packaging bag main body film 23 is folded in half at the center in the width direction in the state in which the mold release material 27 is extracted, and the other of the two. The inner surface sealant layer on the side of the film is fused and joined to the lower melting point outer surface sealant layer 10a of the surface side film portion 6 of the manufactured liquid pouring nozzle 4, and the packaging bag body film 23 The required flexible packaging bag 13 can be manufactured by forming the fusion | fusion part used as the bottom part or top part of a packaging bag in itself.

  FIG. 5 is a side view illustrating another manufacturing process of the liquid pouring nozzle. This is, for example, as described above with reference to FIG. The film portions 6 and 7 of the front and back made of a single laminated film are fusion-bonded at the peripheral portion excluding the side portion which is the base end side 4a of the liquid pouring nozzle 4, and the liquid pouring nozzle 4 and The nozzle 15 having a substantially corresponding shape and size is not bonded in advance to the inner surface of the flexible packaging bag body film 23 on one side as described with reference to FIG. Regardless of the above, the base end side 15a of the nozzle 15 is a region corresponding to the fused portion 17a indicated by the phantom line in the fused portion at the side or top of the flexible packaging bag body 17, in the drawing, at the upper end portion of the side portion. As described above In this state, a release material 27 is interposed between the film portions 6 and 7 on the front and back sides of the nozzle 15, and the flexible packaging bag main body film 23 sandwiching the nozzle 15 is packaged by heat sealing means (not shown). By applying heat and pressure from the outer surface side of the bag main body film 23, the sealant layers 10 a and 11 a on the outer surface of the nozzle 15 are formed in the fused portion 17 a of the formed soft packaging bag main body 17, and the packaging bag main body 17. The base film layer 8 of each of the front and back film portions 6, 7 is fused to the sealant layer on the inner surface of the nozzle 15 and at the proximal end 15 a of the nozzle 15 as described with reference to FIGS. , 9 and the sealant layers 10a, 10b and 11a, 11b stacked on both sides are protruded from the base film layer edges 8a, 9a and fused to each other. Agent layers 10 and 11, etc. constitute a fused joint 14 completely covering and thereby, the manufacturing of the liquid pouring nozzle 4 can be finished simultaneously with the production of flexible packaging bag 13.

  Also in the liquid pouring nozzle 4 manufactured in this way, the adhesive layers 10, 11 and the like are completely covered with the sealant layers 10a, 10b and 11a, 11b as shown in the cross-sectional photograph of FIG. Therefore, even if the in-bag package of the soft packaging bag 13 may come into contact with the base end side 4a of the liquid dispensing nozzle 4, the contact between the adhesive layers 10, 11 and the like and the in-bag package Since it will be reliably blocked by the fusion splicing part 14, sufficient safety and hygiene can always be ensured.

  The end face treatment structure and end face treatment method of a laminated film applied to the liquid dispensing nozzle of a food and beverage packaging bag according to the present invention can be widely used in fields requiring high safety and hygiene. In addition, the liquid pouring nozzle using this end face treatment includes soy sauce, sauce, various seasonings, soups, fruit juices, and other liquid or viscous foods and drinks that may contain other granular materials, It can be suitably used for soft packaging bags for cosmetics, pharmaceuticals, etc., and packaging bags heated at high temperatures such as retort foods.

DESCRIPTION OF SYMBOLS 1 Fusion junction part 2 Tip fusion | fusion part 3 Outflow flow path 4 Liquid extraction nozzle 4a Base end side 5, 17 Soft packaging bag main body 6 Surface side film part 7 Back surface side film part 8, 9 Base film layer 8a, 9a Base film layer edge 10, 11 Adhesive layer 10 a, 10 b, 11 a, 11 b Sealant layer 12 Liquid drain protrusion 13 Soft packaging bag 14 Fusion joint 14 a Edge 15 Nozzle 15 a Base edge 16 Nozzle film 17 a Soft packaging bag body Fusing portion 21 Heat seal plate 22 Sheet seal roll 23 Film for flexible packaging bag body 24 Heat roll 25 Crimp roll 26 Separation roll 27 Release material

Claims (2)

A laminated film of two front and back layers comprising at least a uniaxial or biaxially stretched base film layer and respective sealant layers laminated therebetween, or a laminated film folded in two at the center The peripheral edge portion excluding the portion serving as the nozzle base end side is fused, and the pouring flow path is defined inside thereof, and the nozzle base end side protrudes into the package storage space of the packaging bag body. In the end face of the laminated film used for the liquid dispensing nozzle of the packaging bag for food and drink that is fusion-bonded to the packaging bag body,
The sealant layers protrude from the edge of the base film layer and are fusion-bonded to each other, thereby covering the adhesive layer and the anchor coat layer on the laminated film end surface including the base film layer end surface. An end face structure of a laminated film applied to a liquid pouring nozzle of a food and beverage packaging bag. A laminated film of two front and back layers comprising at least a uniaxial or biaxially stretched base film layer and respective sealant layers laminated therebetween, or a laminated film folded in two at the center The peripheral edge portion excluding the portion serving as the nozzle base end side is fused, and the pouring flow path is defined inside thereof, and the nozzle base end side protrudes into the package storage space of the packaging bag body. A method for treating an end face of a laminated film used for a liquid pouring nozzle of a packaging bag for food and drink that is fusion-bonded to a packaging bag body,
The end portions of the laminated film are heated and pressed so as to be sandwiched from above and below using heat sealing means, and the sealant layers protrude from the edges of the base film layers to be fused and bonded to each other. A laminated film end surface treatment method applied to a liquid dispensing nozzle of a food and beverage packaging bag, wherein the adhesive layer or anchor coat layer portion on the end surface of the laminated film including the end surface is coated.

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