JP2008030765A - Storing bag and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bag for packaging, which is a storing bag allowing visual confirmation of an article stored from a transparent window part, and has an adhesive part structure not causing separation between an opaque substrate sheet and a transparent substrate sheet and has an enhanced appearance. <P>SOLUTION: In the bag for packaging, the opaque substrate sheet (22) consisting of a plurality of opaque substrate sheet parts (22a) mutually separated and arranged and the whole face of the inner face of which is coated with an adhesive (24), and a transparent substrate sheet (23) which is laminated and stuck on the whole face on the inner face side of a plurality of the opaque substrate sheet parts (22a) by utilizing the adhesive, and forms the transparent window part (23a) consisting of the transparent substrate sheet between a plurality of the opaque substrate sheet parts, are provided, and formed into a bag shape as a whole. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  This application is a storage bag for storing food, miscellaneous goods, etc., and the storage contents can be confirmed by visually checking the stored contents from the transparent window portion of the bag or confirming the presence or absence of alteration. The present invention relates to a bag and a method for manufacturing the storage bag.

Conventional technology

  In general, a storage bag for storing food and miscellaneous goods is provided with a transparent window, through which the remaining amount of the contents or the presence or absence of alteration can be easily visually confirmed from the outside. There is something that was made.

As a method of providing the transparent window portion, there are a method of processing only the portion of the window portion and a laminating method of laminating an opaque base material and a transparent base material.
As an example of the former, that is, an example of a method of processing only the window portion, there is, for example, an envelope with a window. According to this, the portion of the window portion of the opaque base material is cut into a predetermined shape and deleted. A transparent substrate is attached to the window. However, according to this, there was a problem that processing of a window part and a transparent base material was troublesome.
As another example of the former, there is a method of forming a transparent window by depositing aluminum on the entire surface of the transparent substrate and removing the appropriate portion of the aluminum deposition surface by chemical treatment. However, it is possible to easily form a transparent window having a desired shape, which is convenient, but there is a problem that the chemical treatment is troublesome.

  Next, as an example of the latter, that is, a laminating method, there is, for example, Japanese Patent Application Laid-Open No. 2003-2340 “Packaging Bag and Method for Producing the Same” as one utilizing an extrusion laminating method. According to this, a transparent base material sheet and an opaque base material (paper etc.) sheet separated into two slits are respectively transferred by a roll, and the transparent base material is transferred by a laminate resin (adhesive) extruded from an extrusion laminator. Disclosed is one in which a sheet is attached to an opaque base material sheet, and a transparent bag portion of the transparent base material sheet is provided in a separation space of the opaque base material to form a packaging bag. However, according to this, since the laminating resin is extruded from the extrusion laminating machine and covers the entire surface of the transparent base sheet, the laminating resin surface that is extruded except for the portion of the laminating resin surface where the opaque base material is bonded is used. However, there is a problem in that sufficient smoothness cannot be obtained, transparency of the transparent window portion tends to be lowered, and the contents may be difficult to see.

  Another example of the latter is a laminating method using an adhesive, which is shown in FIGS. In FIG. 1, the opaque base sheet 11 (11 a, 11 a) slit-separated into two sheets in the same manner as in JP-A-2003-2340 is a chrome-plated gravure roll 12 and a rubber backup roll 13. 2, the adhesive 14 scraped from the gravure roll 12 is applied to one surface (inner surface) of the opaque base sheet 11 as shown in FIG. 2. A doctor blade 15 scrapes off the excess adhesive. The opaque base material sheet 11 is further transferred, and a transparent base material sheet 16 (FIG. 4) is adhesively laminated on the inner surface through the adhesive 14 at an appropriate position to form a laminate 19a. When the laminate 19a is appropriately bent and, for example, three sides thereof are welded 18 as shown in FIG. 5, the storage bag 19 is completed, and the contents between the opaque base sheets 11 are visually observed. A window portion 16a is formed.

  However, according to this, the backup roll 13 is pressed against the gravure roll 12 at a predetermined pressure until the backup roll 13 itself is bent to the bending position 13a (see FIG. 1). An adhesive reservoir 14a (see FIGS. 1 and 2) is formed between the rolls 12 and 13, and the adhesive 14 in the reservoir 14a is transferred to the intermediate portion 13b of the backup roll 13 and protrudes to the side thereof. Thus, an adhesive protruding portion 14b is formed, which is further adhered as an unnecessary adhesive 14c (see FIG. 1) to the back surface of the opaque base material sheet 11 (11a, 11a), which is a problem in appearance and function. .

In order to solve this problem, as shown in FIG. 3, the intermediate portion 12a of the gravure roll 12 is devised not to supply the adhesive without providing a cell for scraping the adhesive 14, or the intermediate portion of the backup roll 13 has a small diameter. Some have been devised so as to prevent the adhesive 14 from adhering to the small diameter portion 13c by providing a portion 13c.
JP 2003-2340 A

  According to the conventional example of FIG. 3, the adhesive 14 is less likely to adhere to both sides of the opaque base sheet 11 (11a, 11a), and as shown in FIGS. 4 and 5, each opaque base sheet 11a. The peeled portions 17 with respect to the transparent base material sheet 16 are formed on both side portions of 11a, resulting in aesthetic and functional problems.

The present invention solves the above-mentioned problems, and the structure is composed of a plurality of opaque base sheet portions (22a) spaced apart from each other in a packaging bag, and an adhesive ( 24) an opaque base sheet (22) coated with a transparent base sheet laminated on the entire inner surface of the plurality of opaque base sheet portions (22a) using the adhesive. (23) comprising the one transparent substrate sheet (23) forming a transparent window portion (23a) made of a transparent substrate sheet between the plurality of opaque substrate sheet portions, the whole being a bag It is formed in a shape.
The method for manufacturing a storage bag according to the present invention includes a step of cutting a plurality of opaque base sheet portions (22a, 22a) in the course of transferring a long opaque base sheet (22), and a kiss reverse coater (36). And attaching the adhesive (24) to the entire inner surface side of the plurality of opaque base sheet portions (22a, 22a), and attaching the long transparent base sheet (23) to the plurality Adhering and laminating the entire inner surface of the opaque base sheet portion (22a, 22a), and processing the adhesive-laminated opaque base sheet (22) and transparent base sheet (23) into a bag shape And a step of forming a storage bag (21) having a transparent window portion (23a) as a part of only the transparent base sheet.

(1) The transparent base sheet is stretched on the transparent base sheet that has been previously adhered with the adhesive, not the extrusion laminating method that extrudes the adhesive when sticking the transparent base sheet and the opaque base sheet. Because the dry laminating method is used, the transparency of the transparent window of the transparent base sheet is good, the contents of the storage bag can be seen well, and the contents are also improved in appearance. I feel delicious when it is food.
(2) Although a kiss reverse coater is used in the dry laminating method, the kiss reverse coater assembly does not have a backup roll, so that unnecessary adhesive does not rotate around and adhere to the back surface of the opaque base material sheet 11, It can improve aesthetics and function.
(3) In the kiss reverse coater assembly, the coater roll rotates in the reverse direction with respect to the transfer direction of the opaque base sheet, so-called reverse rotation, so that the rotation speed is finely divided separately from the transfer speed of the opaque base sheet. The amount of adhesive supplied can be finely controlled. Therefore, the adhesive can spread just to the side edge part of the opaque base material sheet, so that the adhesive part can be completely adhered without any peeling parts on the side part of the opaque base material sheet. Can improve.

6 is a perspective view in which an opaque base sheet and a transparent base sheet constituting the storage bag of the present invention are attached, FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 6, and FIG. It is a top view of an Example.
In FIG. 6, the laminated body 21 a constituting the storage bag 21 (see FIG. 8) is composed of a pair of opaque base sheet 22 (22 a, 22 a) and a single transparent base sheet 23. That is, an adhesive 24 is applied in advance to the entire inner surface (lower surface in the drawing) of each opaque substrate sheet 22 as will be described later, and the transparent substrate sheet 23 is applied to the inner surface of each opaque substrate sheet 22. Is pressed and laminated with an adhesive 24 as will be described later.

  The opaque base material sheet 22 and the transparent base material sheet 23 which are bonded to each other are folded in half to be in the state shown in FIG. 8, and are thermally welded 25 at three sides, so that only one side is the bag opening 26. Thus, the storage bag 21 is completed.

According to this storage bag 21, when food, miscellaneous goods, etc. are stored in the storage bag 21, the inside can be visually observed from the transparent window portion 23 a by the transparent base sheet 23, Confirmation of the degree of alteration of the stored item can be easily confirmed without having to take out the stored item from the bag.
Further, by using a kiss reverse coater assembly 34, which will be described later, the adhesive 24 is applied and adhered in advance to the entire inner surface of the opaque base sheet 22 (22a, 22a). Since the material sheet 23 is pressed and adhered, the opaque base material sheet 22 is surely adhered to the entire surface of the transparent base material sheet 23 without causing a partly peeled state. Or the appearance will not be damaged due to peeling.
Note that the opaque base sheet 22 (22a, 22a) is not limited to a pair, and may be three or more.

  Moreover, as a material of the said opaque base material sheet 22, PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate) with respect to normal papers, such as unryu (Japanese paper), rayon paper, or kraft paper. Alternatively, a resin film such as nylon may be bonded, or a film material such as PE, PP, PET, or nylon may be vapor-deposited with aluminum or silica. Moreover, what formed by sticking aluminum foil on film materials, such as PE, PP, PET, or nylon, may be used.

Moreover, as a material of the said transparent base material sheet 23, the various resin films containing PE, PP, PET, nylon, etc. may be sufficient.
Next, the manufacturing method of this invention storage bag 21 is demonstrated. FIG. 9 is a schematic view for explaining the manufacturing method.
In FIG. 9, the opaque base material sheet 22 introduced into the roll 31 is slit into a plurality of, for example, two opaque base material sheets 22 (22a, 22a) in the longitudinal direction in the slitter 32 (FIG. 9) (FIG. 10). ) And further transferred to the kiss reverse coater assembly 34 by the roll 33. Of course, the opaque base material sheet 22 may be slit into three or more longitudinal sheets. As shown in FIGS. 11 and 12, the kiss reverse coater assembly 34 includes a reverse coater roll 36 (counterclockwise, ie, reverse direction) immersed in an adhesive 24 containing a solvent (such as ethyl acetate) housed in a container 35. And a doctor blade 15 associated therewith, and a pair of touch rolls 38 (rotated counterclockwise by contact friction upon contact with the opaque base sheet 22) disposed on the left and right upper sides of the coater roll 36. Become. The doctor blade 15 scrapes off the excess adhesive 24, but an auxiliary roll may be used instead.

  Here, while the longitudinally cut opaque base material sheet 22 (22a, 22a) cut in two travels in the direction of arrow A, the adhesive material 24 adhered to the coater roll 36 is cut into each of the cut opaque base material sheets. Each of the cut opaque base material sheets 22 (22a, 22a) applied to the inner surfaces (lower surfaces in the drawing) 22 (22a, 22a) is completely transferred and dried by a roll 39 (FIG. 9). After the adhesive is dried in the apparatus 40, the adhesive is further guided to the tension roll 42 (see FIG. 13) via the roll 41.

  On the other hand, the wide transparent base material sheet 23 introduced into the left roll 43 in FIG. 9 is similarly led to the tension roll 42 (see FIG. 13), where the opaque base material is slit into two. It adhere | attaches on the sheet | seat 22 via the adhesive agent 24 (refer FIG. 6, 11). Thus, as shown in FIG. 6, a laminate in which one wide transparent base material sheet 23 is pressed against the inner surface of two opaque base material sheets 22 (22 a, 22 a) and laminated with an adhesive 24. 21a is completed. As shown in FIG. 8, the laminated body 21 a is folded in half and the three sides thereof are heat-welded 25 to form the storage bag 21. Reference numeral 26 denotes the opening direction of the storage bag 25.

FIG. 14 shows another storage bag 44 according to the present invention, and the direction of the opening 26 is on the right side compared to the storage bag 21 of FIG.
FIG. 15 shows still another storage bag 45 according to the present invention. Compared to the case where the storage bags 21 and 44 of FIGS. 8 and 14 are heat-welded on three sides other than the opening 26 on one side. The opaque base material sheet 22 and the transparent base material sheet 23 that are laminated and bonded to the opening 26 on one side (upper side) are wound in a substantially circular shape, and only a total of two pieces of the vertical side 25a and the bottom side 25b. Heat-welded 25.

It is a front view of the roll of the conventional example of one manufacturing method of a storage bag. It is a side view of the roll of the said prior art example. It is a front view of the roll of the other conventional example of the manufacturing method of a storage bag. It is a perspective view of the base material sheet of the storage bag manufactured by the manufacturing method of the said other conventional example. It is a top view of the storage bag manufactured by the manufacturing method of the said other conventional example. It is a perspective view of the base material sheet of one Embodiment of the storage bag which becomes this invention. FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. It is a top view of one embodiment of a storage bag according to the present invention. It is a schematic block diagram of one Embodiment of the manufacturing method of the storage bag which becomes this invention. It is a perspective view of the state which slits the opaque base material sheet of one Embodiment of the storage bag which becomes this invention, and guides it to a coating roll. FIG. 10 is a side view of a kiss reverse coater assembly including the coating roll of FIG. 9. It is a top view of the kiss reverse coater assembly of FIG. It is a perspective view of the state which laminates a transparent base material sheet with respect to the opaque base material sheet of FIG. It is a top view of other embodiments of the storage bag which becomes the present invention. It is a perspective view of other embodiment of the storage bag which becomes this invention.

Explanation of symbols

11 (11a, 11b), 22 (22a, 22b) ... Opaque base sheet 12 Gravure roll 13 Backup rolls 14, 24 Adhesive 14a Adhesive reservoir 15 Doctor blades 16, 23 Transparent base sheet 16a, 23a Transparent Window part 17 Peeling part 18, 25, 25a, 25b Heat welding part 19a, 21a Laminate laminate 19, 21, 44, 45 Storage bag 26 Bag opening part 32 Slitter 34 Reverse coater roll assembly 35 Container 36 Reverse coater roll 38 Touch Roll 40 drying device 42 tension roll

Claims (6)

In the storage bag,
An opaque base sheet (22) comprising a plurality of opaque base sheet portions (22a) spaced apart from each other and having an adhesive (24) applied to the entire inner surface thereof, and the plurality of opaque base materials A transparent substrate sheet (23) laminated on the entire inner surface side of the sheet portion (22a) using the adhesive, and the transparent substrate sheet is interposed between the plurality of opaque substrate sheet portions. A storage bag comprising the one transparent base sheet (23) forming the transparent window portion (23a) to be formed and formed in a bag shape as a whole. In the packaging bag according to claim 1,
For the material of the opaque base sheet, PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), nylon, or the like is used for ordinary paper such as cloud dragon (wakiwashi Japanese paper), rayon paper, or kraft paper. A packaging bag, which is formed by bonding. In the packaging bag according to claim 1,
The material of the opaque base material sheet is formed by vapor-depositing aluminum or silica on a film material such as PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), or nylon. Packaging bag. In the packaging bag according to claim 1,
The opaque base sheet is made of PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), nylon, or other film material formed by attaching an aluminum foil to the packaging bag. . In the packaging bag according to claim 1,
The packaging bag, wherein the material of the transparent base sheet is various resin films including PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), nylon, and the like. Cutting the plurality of opaque base sheet portions (22a, 22a) in the middle of transferring the long opaque base sheet (22);
Using a kiss reverse coater (36) to attach an adhesive (24) to the entire inner surface side of the plurality of opaque base sheet portions (22a, 22a);
Adhering and laminating a single transparent base sheet (23) on the entire inner surface side of the plurality of opaque base sheet portions (22a, 22a);
The adhesive-laminated opaque base sheet (22) and transparent base sheet (23) are processed into a bag shape to form a storage bag (21) in which the transparent base sheet alone is the transparent window part (23a). And a process of
The manufacturing method of the storage bag which comprises this.

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