JP2000168803A - Easily unsealable bag capable of being resealed - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easily unsealable bag capable of being easily resealed, by varying respective thicknesses of both tapes or varying the degree of hardness of each film to which a protruding tape or a recessed tape is welded. SOLUTION: This easily unsealable bag capable of being resealed has a protruding side tape 21 having a protruding stripe 22 and a recess side tape 23 having a recessed stripe 24, each tape being provided on the mutually opposed inside faces of an opening portion 12 of the bag 11 in the width direction thereof, and the protruding stripe 22 of the protruding side tape 21 is fitted into the recessed stripe 24 of the recess side tape 23 to seal the bag. Both the protruding side tape 21 and the recess side tape 22 are so provided as to have a thickness different from each other. Further, a UV-curable varnish is applied onto an outside face opposite to the welded face of the protruding side tape 21 or of the recess side tape 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a convex tape provided on inner surfaces of openings facing each other, which is fitted to a concave tape of a concave tape so that both tapes are engaged and sealed. The present invention relates to a re-sealable easy-open bag that can be opened by releasing the bite.

[0002]

2. Description of the Related Art Conventionally, as means for resealably sealing the opening of a three-way sealing bag made of plastic film or the like,
For example, as shown in FIG.
1 and the other side is fused with a concave side tape 123 having a concave side 124, and the convex side of the convex side tape is fitted into the concave side of the concave side tape so that both tapes are engaged to complete sealing. The bag is opened, the bag is opened by tearing the bag and peeling off the ridges and grooves, and the contents are taken out. Then, after taking out the contents, there is a re-sealable easy-open bag, which re-seals the bag by fitting the convex strip of the convex tape into the concave strip of the concave tape again.

[0003] Although this method is a relatively simple resealable means, in a bag in which both tapes have been bitten once to complete the sealing, the inner films of the opening are easily brought into close contact with each other, and the bag must be resealed. After tearing, the film side of the bag where the convex side tape is fused and the film side where the concave side tape is fused are torn to the same dimensions, which makes it difficult for young children and elderly people to open the bag. there were.

[0004]

SUMMARY OF THE INVENTION The present invention focuses on the above-mentioned problems relating to a resealable easy-open bag in which a convex tape provided on the inner surface of an opening is fitted into a concave tape and hermetically sealed. The present invention provides an easy-open bag that can be easily reopened by changing the thickness of both tapes or by changing the hardness of the film to which the convex tape or the concave tape is fused. The purpose is to:

[0005]

Means for Solving the Problems A first invention of the present invention is:
A convex tape and a concave tape having a concave stripe are provided in the width direction of the bag, and the convex tape of the convex tape is fitted into the concave stripe of the concave tape and sealed. A resealable easy-open bag, wherein the convex side tape and the concave side tape have different thicknesses from each other.

According to a second aspect of the present invention, a convex tape having a convex ridge and a concave tape having a concave ridge are provided in the width direction of the bag on the inner surfaces of the openings facing each other. In a re-sealable easy-open bag in which a convex strip of a convex tape is fitted and sealed, an ultraviolet-curing varnish is applied to a surface opposite to a surface on which the convex tape or the concave tape is fused. Possible easy-open bags.

In a third aspect based on the second aspect, the ultraviolet-curable varnish-applied portion has a band-shaped white portion whose center faces outward above the tape fusion portion,
In addition, a resealable easy-open bag is provided on both front and back surfaces so as to cover the entire tape-fused portion, and a notch is provided at an edge where the white portion is formed.

[0008]

According to the present invention, as described above, since the convex tape and the concave tape are provided with different thicknesses, either of the films becomes thicker and the film can be easily opened. In addition, if an ultraviolet-curing varnish is applied to the surface opposite to the surface on which the convex tape or the concave tape is fused, one side is hard and the other surface is soft. . Furthermore, an ultraviolet-curing varnish-applied part has a band-shaped white part whose center faces outward above the tape fusion part, and is provided on both front and back sides so as to cover the entire tape fusion part. If a notch is provided at the edge where the cutout portion is formed, if the bag is torn along the notch, the bag forms a convex (or concave) in the center and tears, so that the convex (or concave) is held. The bag can then be easily opened.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. The resealable easy-open bag of the present invention is, for example, as shown in FIG.
It has a basic configuration in which two convex side tapes 21 having convex ridges 22 on inner side surfaces facing each other and a concave side tape 23 having concave ridges 24 are fused.

After the contents are stored, the convex stripes of the convex side tape 21 are fitted into the concave stripes of the concave side tape 22 to form the convex stripes 22 and the concave stripes 2.
4 engages to complete the sealing of the opening, and when the fitted ridge is peeled off from the recess, the opening has a structure that opens again, and can withstand repeated use.

The convex tape 21 having the convex stripes 22 and the concave tape 23 having the concave stripes 24 are usually produced by injection molding a polyolefin resin such as polyethylene or polypropylene.

The three-side seal bag 11 is made of, for example, a laminated film having an outer layer, an intermediate layer, an inner layer and the like in which a polyolefin resin such as polyethylene or polypropylene is disposed on the innermost surface. A convex side tape 21 having a convex side 22 on one side and a concave side tape 23 having a concave side 24 on the other opposite side are adhered by a method such as fusion, respectively, and have convex sides of the convex side tape. When the surface is pressed against the surface of the concave tape having the concave ridge, the convex ridge is fitted into the concave ridge and the opening is sealed.

The bag is not limited to a three-side sealed bag, and various known bags such as a two-side sealed bag, a four-side sealed bag, a gusset bag, and a standing pouch can be applied.

When the upper portion of the sealed bag is torn in the width direction along a cut line a such as a perforation line provided above the film surface on which the convex tape and the concave tape are fused, the bag is positioned above the tape. The bag can be opened by tearing and separating the ridge and the ridge of the tape. At this time, since the thicknesses of the tapes are different from each other, the film can be more easily taken and opened easily.

The convex-side tape 21 and the concave-side tape 23, which are arranged at opposing portions of the bag, are arranged such that the thickness of the above-mentioned tape on one side is set smaller than the thickness of the other tape. The point of the present invention is to provide a difference in the tactile sensation when the film is gripped to facilitate opening.

Further, an appropriate amount of an ultraviolet-curing varnish is previously applied to a surface of the laminated film forming the bag opposite to the surface where the tape is to be fused, in a strip shape slightly wider than the tape width, and then dried.
2A and 2B, an ultraviolet-curing varnish application section 31 may be provided on only one side to cure the surface. As a result, a difference in hardness appears between the two films, and the film is easily opened.

Further, the varnish application portion 31 has a band-shaped white portion 32 whose center faces outward above the tape fusion portion, and covers both sides of the bag so as to cover the entire tape fusion portion. And a notch 13 at the edge of the bag in which the white portion is formed.
(See FIGS. 3A and 3B).

When the bag is torn from the notch 13, the bag is torn along the white portion where the varnish is not applied. The protruding portion 14 caused by the tearing is hard when the film is hard.
The film can be held one by one and the bag can be easily opened. Also, by fitting the convex strip of the convex tape into the concave strip of the concave tape, the two tapes are engaged and the bag is sealed. This operation can be repeated any number of times.

[0019]

As described above, according to the present invention, an easily openable bag can be easily opened by changing the thicknesses of the convex side tape and the concave side tape from each other. In addition, by applying an ultraviolet curing varnish to the surface of the bag, a hardness difference is provided between the front and back of the bag so that the bag can be opened easily.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory front view showing an embodiment of an easy-open bag according to the present invention, and FIG. 1 (b) is an explanatory sectional view taken along line AA ′ of FIG.

FIG. 2 shows another embodiment of the easy-open bag according to the present invention, (a).
Is an explanatory front view, and (b) is an explanatory sectional view taken along line AA ′ of (a).

FIG. 3 shows yet another embodiment of the easy-open bag of the present invention.
(A) is an explanatory front view, and (b) is AA ′ of (a).
FIG.

FIG. 4A is an explanatory front view of a conventional easy-open bag;
FIG. 2B is an explanatory cross-sectional view taken along line AA ′ of FIG.

[Explanation of symbols]

 11 3 side seal bag 12 opening 13 cutout 14 convex 21 tape convex 22 tape convex 23 tape concave 31 varnish coating 32 ‥‥ White part 111 ‥‥ Three-sided seal bag 112 ‥‥ Opening 121 ‥‥ Convex tape 122 ‥‥ Convex ridge 123 ‥‥ Concave tape 124 ‥‥ Concave a

Claims (3)

[Claims] A convex tape and a concave tape having a concave strip are provided in the width direction of a bag, and a convex tape of the convex tape is provided in a concave direction of the concave tape. Wherein the convex side tape and the concave side tape have different thicknesses from each other. 2. A convex tape having a convex tape on an inner surface of the opening facing each other and a concave tape having a concave tape are provided in the width direction of the bag, and the convex tape of the convex tape is provided on the concave tape of the concave tape. A UV-curable varnish is applied to the surface opposite to the surface on which the convex tape or the concave tape is fused, wherein the UV-curable varnish is applied. 3. The ultraviolet-curable varnish-applied portion has a band-shaped white portion whose center faces outward above the tape-fused portion, and covers both sides of the tape so as to cover the entire tape-fused portion. The resealable easy-open bag according to claim 3, wherein a notch is provided at an edge where the white portion is formed.