JP2003137314A - Re-sealable bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bag with a re-sealing function which is inexpensive, is free from occurrence of pin hole, and can be simply opened/closed even if the strength of fingertips is weak. SOLUTION: A re-seal tape 6 comprising sealant films 7 and 8 and an easy-to- peel restickable layer 9 formed therebetween is inserted into an opening of a bag 1 and sealed with an internal surface of the bag 1. Thus when a mouth of the bag 1 is opened when unsealing, the sealant film 7 is broken at an unsealed portion 12, and ply separation from the film 7 occurs at the restickable layer 9, causing the bag 1 to be unsealed. By pressing the re-seal tape 6 for re-sealing, the sealant film 7 comes into tight contact with the layer 9 to have the bag 1 re-sealed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag which can be resealed by an inexpensive means.

[0002]

2. Description of the Related Art A bag that can be used to seal confectionery and other products in a sealed manner for distribution, and after the consumer has opened the bag, can be resealed,
It is known that a resealing means called a zipper is incorporated in the opening of the bag. FIG. 12 is an explanatory view of this zipper-equipped bag, in which the resealing zipper 100 is a male thread 1.
03 and female strip 104 are formed on the base tapes 101 and 102, and the base tapes 101 and 102 are sealed to the inner surface of the bag 105, and depending on the bag 105, a mouth seal 106 is provided on the outside of the zipper 100 to seal the zipper 100 and the mouth seal. V notches 107 are inserted between 106.

[0003]

Such a zipper 1
The bag 105 that can be resealed with 00 is very useful because it can be easily resealed, but the biggest drawback is the high cost and the zipper tape 100 inserted in the mouth seal 106 of the bag 105. When the side seals 108 and 109 are performed, the resin amount in the portions 108a and 109a where the side seals 108 and 109 and the zipper tape 100 intersect becomes thicker (more) than the other side seals 108 and 109. Therefore, pinholes tend to occur here during heat sealing. Therefore, conventionally, on the zipper tape 100 side, 108a and 10
By taking measures such as reducing the amount of resin by punching the male strip 103 and the female strip 104 in the portion 9a, pinholes are still likely to occur.
Advanced bag making technology is required.

In the case of the zipper tape 100, the male strip 103 and the female strip 104 may not be surely engaged with each other.
The sealing property is impaired, and the male strip 103 and the female strip 1 are
It is very troublesome to bite 04 for people with fingertip disabilities, children and the elderly. As another zipper, there is one in which a slider is attached to facilitate the resealing and resealing, but this zipper with a slider becomes more expensive and its use range is limited.

A first object of the present invention is to provide an inexpensive resealable bag. A second object is to provide a resealable bag in which pinholes do not occur in the side seal portion when the resealing means is attached by heat sealing. A third object is to provide a bag that can be reliably resealed by persons with fingertip disabilities, children, the elderly and the like.

[0006]

In order to achieve the above-mentioned object, in the invention described in claim 1, in a resealable bag, an easily peelable re-adhesive layer is formed in the opening. It is a feature.

Further, in the invention described in claim 2,
A resealable bag is characterized in that a sealant film having an easily peelable re-adhesive layer formed on one surface thereof is inserted into an opening of the bag to seal the sealant film on an inner surface of the bag. It is a thing.

Further, in the invention described in claim 3,
In a resealable bag, a reseal tape having a structure in which an easily peelable re-adhesive layer is formed between sealant films is inserted into the opening of the bag to seal the sealant film on the inner surface of each bag. It is what

Further, in the invention described in claim 4,
In the invention according to claim 1, the easily peelable re-adhesive layer is a water- or solvent-type pressure-sensitive adhesive made of an acrylic or rubber-based, EVA-based or urethane-based resin as a material. .

Further, in the invention described in claim 5,
The invention according to claim 1 or 2 or 3 or 4 is characterized in that an easily peelable re-adhesive layer or a reseal tape is inserted into the back-applied portion.

Further, in the invention described in claim 6,
The invention according to claim 1 or 2 or 3 or 4 is characterized in that an easily peelable re-adhesive layer or a reseal tape is inserted in the longitudinal direction on the side of the bag.

[0012]

[Function] To open the bag, if the film on both sides (front and back) of the bag with the easy peeling re-adhesive layer or the reseal tape is expanded, the bag mouth is delaminated at the easy peeling re-adhesive layer. Occurs and the bag is opened at its mouth.
When resealing, when the bag mouth is closed and pressed as it is, the easily peelable re-adhesive layer which has been peeled off is re-adhered to the opposing surface by its adhesive action. As a result, the mouth of the bag is closed. It is not possible to repeat this opening and re-adhesion several tens of times like a zipper, but usually about 10 times is possible. Therefore, most of the products are resealed products about 5 to 6 times, so that the bag of the present invention has sufficient durability.

[0013]

[Embodiment 1] This embodiment is an example in which a reseal tape is inserted into the mouth of a three-side sealed bag. Fig. 1 is an overall view of the bag, Fig. 2 is a cross-sectional view of the reseal tape, and Fig. 3 is a closed mouth. FIG. 4 is a cross-sectional view of the seal and reseal tape portion, FIG. 4 is an explanatory view showing a state in which the mouth seal portion is cut, the reseal tape portion is delaminated and the bag mouth is opened, and FIG. 5 is the reseal tape portion resealed. It is explanatory drawing of a state. This Figure 1
In FIG. 5, 1 is a bag called a three-sided seal having side seals 2 and 3 and a bottom seal 4, 5 is a mouth seal, and 6 is a reseal tape inserted in the mouth seal 5. As shown in FIG. 2, 6 has sealant films (PE) 7 and 8 on both outer surfaces, an easily peelable re-adhesive layer 9 is placed between the sealant films 7 and 8, and the sealant film 8 Intermediate film (PET) 10
Is a four-layer structure in which However, this reseal tape 6
As long as the sealant films 8 and 9 are arranged on both sides and the easily peelable readhesion layer 9 is arranged between them, the presence or absence of the intermediate film 10, the number of layers and the material are arbitrary.

The easy peeling and re-adhesive layer 9 has such an adhesive strength that delamination occurs between the easy peeling and re-adhesive layer 9 and the sealant film 8 or 9 at the time of opening, and the re-adhesion is made by pressing again. It is necessary to have adhesiveness, and in this example, Oliverin (trade name of Toyo Ink Mfg. Co., Ltd.) was used. The specific structure of the resealing tape 6 is as follows. PE ^{# 20} / Oliverin ^{# 15} / PET ^{# 20} / PE ^{# 20 In} FIG. 1, reference numeral 11 is a V-cut for opening.

An example of unsealing and resealing will be described with reference to FIGS. FIG. 3 is a cross section of the mouth seal 5 and the reseal tape 6, and the reseal tape 6 is used to heat the edges of the sealant films 7 and 8 when heat-sealed in the bag 1.
Unsealed portions 12 and 13 are formed along a and 8a. However, the unsealed portions 12 and 13 are formed at the time of bag making and are not an essential constituent element in the present invention.

In the bag 1 in this state, the mouth seal 6 is cut with the V-cut 11, and the front film 1a and the back film 1b of the opened bag 1 are picked up with fingertips and opened in the direction of arrow a in FIG. The peeling force acts on the resealing tape 6, and the resealing tape 6 is easily broken at the sealant film 7 and the easy peeling adhesive layer 9 where the adhesion strength is weak, leaving the unsealed portion 12 and then breaking. Delamination occurs at the peeling and re-adhesive layer 9, and the bag 1 is opened.

In the case of resealing, as shown in FIG. 5, the opening of the opened bag 1 is closed, and the portion of the resealing tape 6 is pressed so as to sandwich it from the upper and lower sides. The adhesive layer 9 adheres and the bag 1 is resealed. FIGS. 6 (A) to (I) show examples in which the reseal tape 6 is inserted according to the form of the bag, FIG. 6 (A) is an example in which the reseal tape 6 is inserted along the side seals 2 and 3 of the three-way seal bag 1, (B). Is an example of inserting into a standing pouch, (C) is an example of inserting into a bottom standing pouch, (D) is an example of inserting into a pillow bag, and (E) is an example of inserting into a back-adhered portion of a back-applied bag,
(F) is an example of inserting along the side of the back, (G) is an example of inserting into the gusset portion of the gusset bag, (H) is an example of inserting into the back attaching portion of the gusset bag, (I) is a deformed bottom This is an example of insertion into a standing pouch. However, the example of inserting the reseal tape 6 is not limited to the above.

FIG. 7 shows an example of a method of making a bag by inserting the reseal tape 6, and in the case of a three-sided bag, the reseal tape 6 is drawn out between the two front films 1a and the back film 1b. The side seals 2 and 3 and the mouth seal 5 are provided, and the bag between the side seals 2 and 3 is cut and finished.

FIG. 8 shows an example in which the reseal tape 6 is inserted into a pillow type bag. FIG. 9 shows an example of a backing bag in which a reseal tape 6 cut into a predetermined length in a direction perpendicular to the longitudinal direction of the film is inserted. In the above manufacturing method, the resealing tape 6 is heat-sealed to the inner surface of the bag 1 by the heat-sealing method, but it may be sealed by using another adhesive or a bonding method.

[0020]

[Embodiment 2] Embodiment 2 is an embodiment of the invention described in claim 1, in which an easily peelable readhesion layer 9 is directly inserted into the mouth of the bag 1 as shown in FIG. Front and back film 1
a and 1b are closely adhered to each other, and at the time of opening, the easily peelable readhesion layer 9 and the front film 1a or the back film 1
Delamination occurs between b.

[0021]

[Embodiment 3] This embodiment 3 is an embodiment of the invention described in claim 2 and, as shown in FIG.
Is one in which the sealant film 8 is formed on one surface, and the easy peeling and re-adhesive layer 9 is formed on the surface of the sealant film 8. Delamination at the time of opening occurs between the surface film 1a and the easy peeling and re-adhesive layer 9. In addition, in the bag 1, when the easily peelable readhesion layer 9 is made to cross the side seals 2 and 3, if there is a possibility that the sealing strength of the side seals 2 and 3 may decrease, the side seal 2 The formation of the easily peelable re-adhesion layer 9 may be deleted in the third part.

[0022]

INDUSTRIAL APPLICABILITY As described above, the present invention has the following effects because it is possible to perform resealing with an easily peelable re-adhesive layer or a resealing tape instead of the conventional zipper. 1. It is cheaper than conventional zippers. 2. Unlike the conventional zipper, there is no male or female structure, so there is no pinhole in the side seal during bag making. 3. At the time of resealing, since the resealing tape portion may be pressed as it is, it can be easily handled by a person having a fingertip, a child or an elderly person.

[Brief description of drawings]

FIG. 1 is an explanatory view of a bag embodying the present invention.

FIG. 2 is an explanatory diagram of a reseal tape.

FIG. 3 is a sectional view taken along the line AA ′.

FIG. 4 is an explanatory view of a state where delamination occurs at the reseal tape and the package is opened.

FIG. 5 is an explanatory diagram of resealing.

FIG. 6 is an explanatory diagram of an example of inserting various bags and a reseal tape.

FIG. 7 is an explanatory diagram of an example of inserting a bag made of three-sided seal and a reseal tape.

FIG. 8 is an explanatory view of an example of forming a pillow bag and inserting a reseal tape.

FIG. 9 is an explanatory view of an example of making a back-attached bag and inserting a reseal tape.

FIG. 10 is an explanatory diagram of Example 2 in which an easily peelable readhesion layer is inserted in the mouth of the bag.

FIG. 11 is an explanatory diagram of Example 3 in which a reseal tape having an easily peelable re-adhesive layer formed on a sheet of sealant film is inserted into the mouth of the bag.

FIG. 12 is an explanatory view of a conventional bag with a zipper.

FIG. 13 is a sectional view taken along line BB ′.

[Explanation of symbols]

1 bag A few side seals 4 Bottom seal 5 mouth seal 6 reseal tape 7,8 sealant film 9 Easy peeling re-adhesion layer 10 Intermediate film 11 V-cut for opening 12, 13 Unsealed part 14 back

Claims (6)

[Claims] 1. A resealable bag comprising an easily peelable re-adhesive layer formed in the opening. 2. A bag capable of resealing, comprising a reseal tape having an easily peelable re-adhesive layer formed on one surface of a sealant film, which is inserted into an opening of the bag to seal the sealant film on the inner surface of the bag. 3. A resealable bag in which a reseal tape having a structure in which an easily peelable re-adhesive layer is formed between sealant films is inserted into the opening of the bag to seal the sealant film on the inner surface of each bag. . 4. The re-adhesive layer according to claim 1, wherein the easily peelable re-adhesive layer is an aqueous or solvent type pressure-sensitive adhesive made of an acrylic or rubber-based, EVA-based or urethane-based resin as a material. A bag that enables sealing. 5. The resealable bag according to claim 1, 2 or 3 or 4, wherein an easily peelable re-adhesive layer or a reseal tape is inserted into the back-applied portion. 6. An easily peelable re-adhesive layer or a reseal tape is vertically inserted on the side of the bag.
Alternatively, the resealable bag according to 3 or 4.