JP2016101931A - Storage bag and manufacturing method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a storage bag for storing a content with adhesiveness or viscosity, in which an adhesion preventing layer can be easily formed, and which is made so that damage to the exterior appearance of the content is restricted or prevented even when a color of the adhesion preventing layer is transferred to the content.SOLUTION: An adhesion preventing layer 25 is formed over the whole area of an inner surface of a portion 12 defining a storage chamber 1s in two sheet parts 10 and 10 of a storage bag 1. Then, the two sheet parts 10 and 10 are disposed so as to face each other whereas edge parts 11a and 11a of the sheet parts 10 and 10 are mutually sealed by a heat seal. A color of the adhesion preventing layer 25 is of the same color system as a content 2.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a storage bag and a method of manufacturing the storage bag, and more particularly to a storage bag suitable for storing contents having adhesiveness or tackiness such as an adhesive or a pressure-sensitive adhesive, and a manufacturing method thereof.

  For example, Patent Document 1 discloses a storage bag that stores adhesive contents. An adhesion preventing layer is applied to the inner surface of the storage chamber of the storage bag. The adhesion preventing layer is made of silicone and is transparent. By adding a colorant only to the outer edge portion of the adhesion preventing layer, a line-shaped colored layer is formed. By this colored layer, the boundary between the adhesion preventing layer and the outer heat seal region becomes clear, and the heat seal operation during bag manufacture can be simplified. Moreover, since the part inside a colored layer in an adhesion prevention layer is transparent, it can prevent that a color transfers to the content.

JP 2012-76768 A

  In the above-mentioned Patent Document 1, it is troublesome to apply a line-shaped colored layer along the outer edge portion of the adhesion preventing layer, and the transparent layer and the colored layer must be applied separately, which increases the number of steps. On the other hand, when the entire region of the adhesion preventing layer is a colored layer, the appearance of the contents may be impaired due to the color shifting to the adhesive or sticky contents.

In order to solve the above problems, the present invention is a storage bag for storing adhesive or sticky contents,
It has two seat parts that define a storage chamber between each other and the edges are continuous,
An adhesion preventing layer for preventing adhesion of the contents is provided on the entire inner surface of the portion defining the storage chamber in these sheet portions,
The adhesion preventing layer is colored in the same color system as the contents.
According to this storage bag, it is only necessary to form the adhesion preventing layer uniformly over the entire portion of the sheet portion defining the accommodation chamber, and it is not necessary to make only the outer edge portion of the adhesion preventing layer a line-shaped colored layer. . Further, by providing the adhesion preventing layer, it is possible to prevent the adhesive or sticky contents from adhering to the inner surface of the storage bag, and the contents can be smoothly taken out from the storage bag. Furthermore, even if the color of the anti-adhesion layer is transferred to the contents in the containing bag, it is not noticeable because it is the same color system. Therefore, it can suppress or prevent that the external appearance of the content is impaired.

Each of the sheet portions is composed of a laminate sheet whose innermost layer is a heat seal resin layer, and the adhesion preventing layer is provided in a portion corresponding to the storage chamber in the heat seal resin layer of each sheet portion,
The color of the adhesion preventing layer is different from the color appearing on the inner surface side of the laminate sheet, or the laminate sheet is transparent,
It is preferable that edges of the heat seal resin layers of the two sheet portions that extend outward from the adhesion preventing layer are integrally joined by heat sealing.
Thereby, when manufacturing an accommodation bag, the boundary of the edge of a heat seal resin layer and an adhesion prevention layer can be distinguished clearly. Therefore, the borders between the two sheet portions can be easily and exactly matched, and displacement of these sheet portions can be prevented. Therefore, it is possible to prevent the edge portion of the heat seal resin layer of either one of the sheet portions from being partially exposed in the storage chamber, and to prevent the adhesive or sticky contents from adhering to the exposed portion. Can do. As a result, when the contents are used, the contents portion can be smoothly taken out from the containing bag, and further, the amount of contents that cannot be taken out from the containing bag can be reduced, and the use efficiency of the contents can be secured. .

The content is composed of a hot-melt adhesive, the melting temperature of the heat-seal resin layer is higher than the melting temperature of the hot-melt adhesive, and the melting temperature of the anti-adhesion layer is that of the heat-seal resin layer. It is preferably higher than the melting temperature.
Thereby, when the edges of the heat-seal resin layers of the two sheet parts are heat-sealed in order to manufacture the storage bag, the adhesion preventing layer can be prevented from melting. Further, when the hot melt adhesive is melted and filled in the storage chamber, it is possible to prevent the heat seal resin layer from melting and opening a hole in the sealed portion.

Further, the present invention is a method of manufacturing a storage bag for storing adhesive or sticky contents,
After forming an adhesion preventing layer of the same color system as the contents over the entire inner surface of the portion that should define the storage chamber in the two sheet portions,
The two sheet portions are opposed to each other, and edges of the sheet portions that extend outward from the adhesion preventing layer are sealed by heat sealing.
According to this method, it is only necessary to form the adhesion preventing layer uniformly over the entire portion of the sheet portion defining the accommodation chamber, and it is not necessary to make only the outer edge portion of the adhesion preventing layer a line-shaped colored layer. Further, the boundary between the edge portion to be sealed in the heat seal resin layer and the adhesion preventing layer can be clearly distinguished. Therefore, the borders between the two sheet portions can be easily and exactly matched, and displacement of these sheet portions can be prevented. Therefore, it is possible to prevent the edge portion of the heat seal resin layer of either one of the sheet portions from being partially exposed in the storage chamber, and to prevent the adhesive or sticky contents from adhering to the exposed portion. Can do. As a result, when the contents are used, the contents portion can be smoothly taken out from the containing bag, the amount of contents that cannot be taken out from the containing bag can be reduced, and the use efficiency of the contents can be ensured. Furthermore, even if the color of the anti-adhesion layer is transferred to the contents in the containing bag, it is not noticeable because it is the same color system. Therefore, it can suppress or prevent that the external appearance of the content is impaired.

  According to the present invention, it is possible to easily form an adhesion preventing layer and to suppress or prevent the appearance of the contents from being impaired even if the color of the adhesion preventing layer is transferred to the contents.

FIG. 1 is a front view showing an accommodation bag according to an embodiment of the present invention with the upper end mouth part slightly opened. FIG. 2 is a front view showing the housing bag at the time of manufacture in a state before being folded in two after application of the adhesion preventing layer. FIG. 3 is a cross-sectional view of the accommodation bag along the line III-III in FIG. 1.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a storage bag 1. In the storage chamber 1s inside the storage bag 1, contents having adhesiveness or tackiness are stored. The content of this embodiment is a hot melt adhesive 2.

  The storage bag 1 includes two sheet portions 10 and 10. The two sheet portions 10 and 10 face each other, whereby a storage chamber 1 s is defined between the two sheet portions 10 and 10. The edge portions 11 of the sheet portions 10 are connected to each other. A storage chamber 1 s is defined by a portion (storage chamber defining portion 12) inside the edge portion 11 of each sheet portion 10.

  Specifically, the storage bag 1 of this embodiment is configured by a two-sided bag. That is, as shown in FIGS. 1 and 2, the containing bag 1 is formed by folding one sheet 1X in half and sandwiching the bent portion 1b into sheet portions 10 and 10 on both sides, and the bent portion 1b at the bottom. And the left and right edges are sealed by heat sealing. Accordingly, in the bent portion 1b, the lower edge portions 11b and 11b of the sheet portions 10 and 10 are integrally connected. The edge portions 11a and 11a on both the left and right sides of the sheet portions 10 and 10 are connected and sealed by heat sealing to constitute a sealing portion 1a.

  As shown in FIG. 1, the upper part of the storage bag 1 is a mouth part 1e. After the hot melt adhesive 2 is filled into the storage chamber 1s from the opening 1e, the upper edges 11e and 11e of the sheet portions 10 and 10 are sealed by heat sealing. Thereby, the storage bag 1 is sealed.

  As shown in FIG. 3, the sheet 1 </ b> X and thus each sheet portion 10 is composed of a laminate sheet 20. The laminate sheet 20 has a structure in which a surface resin layer 21, a metal film layer 22, an intermediate resin layer 23, and a heat seal resin layer 24 are laminated in order from the front side. In FIG. 3, the thickness of each layer 21 to 24 is exaggerated with respect to the width (the dimension in the left-right direction in the figure). The outermost surface resin layer 21 is made of a resin such as polyethylene terephthalate (PET). The metal film layer 22 is made of, for example, aluminum. The intermediate resin layer 23 is made of a resin such as nylon (registered trademark), for example. The innermost heat seal resin layer 24 is made of a resin such as PET. The left and right edges 24a, 24a (sealed portions) of the heat seal resin layers 24, 24 of the two sheet portions 10, 10 are integrally joined by heat sealing.

The resin layers 21, 23, and 24 in the laminate sheet 20 are transparent. Therefore, the silvery white of aluminum constituting the metal film layer 22 appears on the outer surface side (front side) of the laminate sheet 20 and also on the inner surface side.
Note that the outer surface of the containing bag 1 may be printed with a product name, material, advertisement, and other various contents.

  As shown in FIGS. 2 and 3, an adhesion preventing layer 25 (a shaded pattern portion in FIG. 2) is provided on the inner surface of the storage chamber defining portion 12 in each sheet portion 10. The adhesion preventing layer 25 covers the entire inner surface of the storage chamber 1s by covering the entire storage chamber defining portion 12. Specifically, the adhesion preventing layer 2 is coated on a portion 24 s corresponding to the housing chamber 1 s in the heat seal resin layer 24. Edges 24 a on both the left and right sides of the heat seal resin layer 24 extend outward from the adhesion preventing layer 25.

  The adhesion preventing layer 25 has poor adhesion to the hot melt adhesive 2. Here, as the main material of the adhesion preventing layer 25, hardly adhesive silicone is used. Silicone itself is transparent. The adhesion preventing layer 25 is colored by adding a colorant to the silicone. The colorant is uniformly added to the entire adhesion preventing layer 25. Therefore, the entire area of the inner surface of the storage chamber 1s is the color of the colorant.

Moreover, the adhesion preventing layer 25 is colored in the same color system as the hot melt adhesive 2. For example, when the hot melt adhesive 2 is blue, the adhesion preventing layer 25 is made blue by using a blue colorant. When the hot melt adhesive 2 is red, the adhesion preventing layer 25 is made red by using a red colorant. Here, the “same color system” is not limited to the exact same color, and includes a slightly different color within a range where the color transfer is not noticeable when the color of the adhesion preventing layer 25 is transferred to the hot melt adhesive 2. is there. Specifically, in the L ^* a ^* b ^* color system based on JISZ8729, the color difference ΔE ^* ab of the anti-adhesion layer 25 to the hot melt adhesive 2 is preferably ΔE ^* ab = 20 or less, more preferably ΔE ^*. ab = 10 or less, more preferably ΔE ^* ab = 5 or less.

Further, the color of the adhesion preventing layer 25 is different from the color appearing on the inner surface side of the laminate sheet 20. That is, the adhesion preventing layer 25 has a color different from the silver white color of the metal film layer 22. In other words, the laminate sheet 20 has a different color from the adhesion preventing layer 25 and the hot melt adhesive 2. Here, the “different color system” means that the color of the adhesion preventing layer 25 and the color of the laminate sheet 20 are different to the extent that they can be recognized as different colors at a glance. Specifically, in the L ^* a ^* b ^* color system based on JISZ8729, the color difference ΔE ^* ab of the adhesion preventing layer 25 to the laminate sheet 20 is preferably ΔE ^* ab = 30 or more, more preferably ΔE ^* ab = 60 or more.

The melting temperature T ₂₅ of the silicone anti-adhesion layer 25 is on the order of 1000 ° C., which is much higher than the melting temperature T ₂₄ of the heat seal resin layer 24 (T ₂₅ > T ₂₄ ). Further, the melting temperature _{T 24} of the heat sealing resin layer 24 is higher than the melting temperature _{T 2} of the hot melt adhesive _{2 (T 24> T 2)} . For example, the melting temperature T ₂₄ of the heat seal resin layer 24 made of PET is about T ₂₄ = 120 ° C. to 260 ° C. The melting temperature T ₂ of the hot melt adhesive ₂ is about T ₂ = 100 ° C.

The containing bag 1 is manufactured as follows.
First, an adhesion preventing layer 25 having the same color as that of the hot melt adhesive 2 to be accommodated is prepared. The color of the adhesion preventing layer 25 and the color on the inner surface side of the laminate sheet 20 are different colors.
As shown in FIG. 2, the adhesion preventing layer 25 is applied to the inner surface of the accommodating chamber defining portion 12 in the laminate sheet 20, that is, the inner surface of the accommodating chamber corresponding portion 24 s of the heat seal resin layer 24. Thereby, the sheet 1X including the laminate sheet 20 and the adhesion preventing layer 25 is formed. As an application method, it may be applied by brush or roller, or may be applied by spraying with a nozzle. At this time, the single adhesion preventing layer 25 may be uniformly applied to the entire area of the storage chamber defining portion 12. For example, it is necessary to apply a line-shaped colored layer only to the outer edge portion of the storage chamber defining portion 12. No. Therefore, the coating operation can be easily performed and the number of man-hours can be reduced.

  Next, the sheet 1X is folded in half so that the sheet portions 10, 10 on both sides are overlapped with each other with the bent portion 1b interposed therebetween. At this time, the left and right edges 25a and 25a of the adhesion preventing layers 25 and 25 of the two sheet parts 10 and 10 (the boundary between the adhesion preventing layer 25 and the edge part 11a) are matched. Since the adhesion preventing layer 25 is colored and has a different color from the edge 11a of the sheet 1X, the boundary between the adhesion preventing layer 25 and the edge 11a can be clearly distinguished. Therefore, the left and right edges 25a and 25a of the adhesion preventing layers 25 and 25 of the two sheet portions 10 and 10 can be easily aligned closely, and the displacement between the sheet portions 10 and 10 can be eliminated. Thereby, it is possible to prevent the edge portion 11a of any one of the sheet portions 10 from being partially exposed in the accommodation chamber 1s.

Subsequently, the edge portions 11a and 11a on the left and right sides of the sheet portions 10 and 10 are heat sealed and sealed. That is, these edges 11a, 11a and by heating above the melting temperature _{T 24} of the heat sealing resin layer 24, the edge 24a of the heat-sealing resin layer 24, 24, joined together by melting and do 24a. Thereby, the sealing part 1a is formed. At this time, even if the heating region reaches the application region of the adhesion preventing layer 25, the melting temperature T ₂₅ of the adhesion preventing layer ₂₅ is sufficiently higher than the melting temperature T ₂₄ of the heat seal resin layer 24 (T ₂₅ > T ₂₄ ), the adhesion preventing layers 25 and 25 of the sheet portions 10 and 10 are not melted and joined. Therefore, it is not necessary to strictly adjust the heating region, and the heat sealing operation can be easily performed.

Thereafter, the hot melt adhesive 2 is melted and poured into the housing chamber 1s from the mouth 1e. Since the melting temperature T ₂₄ of the heat sealing resin layer 24 is higher than the melting temperature T ₂ of the hot melt adhesive _{2 (T 24> T 2)} , never heat-sealing resin layer 24 is melted by the heat the hot-melt adhesive 2 The sealing state of the sealing part 1a can be maintained.

  After the hot melt adhesive 2 is filled, the accommodation bag 1 is sealed by heat-sealing the upper edge portions 11e and 11e of the sheet portions 10 and 10.

  Since the adhesion preventing layer 25 having poor adhesion is coated on the inner surface of the storage chamber 1s, the hot melt adhesive 2 can be prevented from adhering to the inner surface of the storage chamber 1s. In addition, as described above, heat-sealing is performed by accurately aligning the sheet portions 10 and 10 using the color difference between the edge portion 11a of the sheet portion 10 and the adhesion preventing layer 25 during bag making. Since it is possible to prevent the edge 24a of the resin layer 24 from being partially exposed in the housing chamber 1s, it is possible to prevent the hot melt adhesive 2 from adhering to the exposed portion.

  When the hot melt adhesive 2 is used, one portion of the containing bag 1 is cut out to provide an opening, and the hot melt adhesive 2 is discharged therefrom. Since the hot melt adhesive 2 is prevented from adhering to the inner surface of the storage chamber 1s by the adhesion preventing layer 25, the hot melt adhesive 2 can be smoothly discharged from the storage bag 1. Furthermore, the amount of hot melt adhesive 2 that cannot be removed from the storage bag 1 can be reduced, and the use efficiency of the hot melt adhesive 2 can be ensured.

  Since the hot melt adhesive 2 in the storage bag 1 is in contact with the adhesion preventing layer 25, the color of the adhesion preventing layer 25 may be transferred to the hot melt adhesive 2. However, since the adhesion preventing layer 25 has the same color system as that of the hot melt adhesive 2, even if the color shifts to the hot melt adhesive 2, the color transfer portion can be made inconspicuous. Therefore, it can suppress or prevent that the external appearance of the hot-melt-adhesive 2 is impaired.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the storage bag 1 is not limited to a two-sided bag and may be a three-sided bag. In this case, the two sheet portions 10 and 10 are separated from each other, and are overlapped with each other, and the edge portions on the lower side and the left and right sides are sealed by heat sealing. Further, the upper edge is sealed by heat sealing after the hot melt adhesive 2 is filled.
Moreover, the storage bag 1 may be manufactured from a cylindrical sheet. In this case, the left and right edge portions of the sheet portions 10 and 10 are integrally connected. The lower edge portion of the sheet portions 10 is sealed by heat sealing. Further, the upper edge is sealed by heat sealing after the hot melt adhesive 2 is filled.

The metal film layer 22 of the laminate sheet 20 may be omitted, or the laminate sheet 20 may be transparent. When the laminate sheet 20 is transparent, the adhesion preventing layer 25 is visible from the outside. Therefore, when manufacturing the containing bag 1, the edges 25a and 25a of the adhesion preventing layers 25 and 25 of the two sheet portions 10 and 10 can be easily matched. Therefore, it is possible to prevent the displacement of the sheet portions 10 and 10 more reliably.
The contents are not limited to the hot melt adhesive 2, but may be other adhesives, may be pressure-sensitive adhesives, or may be contents in which an adhesive or pressure-sensitive adhesive is provided only in part. .

  The present invention can be applied to, for example, a storage bag for storing a hot melt adhesive.

DESCRIPTION OF SYMBOLS 1 Storage bag 1a Sealing part 1s Storage chamber 2 Hot melt adhesive (contents)
10 Sheet part 11 Edge part 11a Edge part 12 of both right and left sides Storage chamber defining part (part defining the storage room)
20 Laminated sheet 24 Heat seal resin layer, innermost layer 24a Edge 24s Accommodating room corresponding part (corresponding to accommodating room)
25 Anti-adhesion layer

Claims (4)

A storage bag for storing adhesive or sticky contents,
It has two seat parts that define a storage chamber between each other and the edges are continuous,
An adhesion preventing layer for preventing adhesion of the contents is provided on the entire inner surface of the portion defining the storage chamber in these sheet portions,
The accommodation bag, wherein the adhesion preventing layer is colored in the same color system as the contents. Each of the sheet portions is composed of a laminate sheet whose innermost layer is a heat seal resin layer, and the adhesion preventing layer is provided in a portion corresponding to the storage chamber in the heat seal resin layer of each sheet portion,
The color of the adhesion preventing layer is different from the color appearing on the inner surface side of the laminate sheet, or the laminate sheet is transparent,
2. The storage bag according to claim 1, wherein edges of the heat seal resin layers of the two sheet portions that extend outward from the adhesion preventing layer are integrally joined by heat sealing.   The content is composed of a hot-melt adhesive, the melting temperature of the heat-seal resin layer is higher than the melting temperature of the hot-melt adhesive, and the melting temperature of the anti-adhesion layer is that of the heat-seal resin layer The containing bag according to claim 2, wherein the containing bag is higher than a melting temperature. A method of manufacturing a storage bag for storing adhesive or sticky contents,
After forming an adhesion preventing layer of the same color system as the contents over the entire inner surface of the portion that should define the storage chamber in the two sheet portions,
A method for manufacturing a storage bag, wherein the two sheet portions are opposed to each other, and edges of the sheet portions that extend outward from the adhesion preventing layer are sealed by heat sealing.

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