JP2000335602A - Plastic bag, and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plastic bag the opening part of which can be easily sealed, and its manufacturing method. SOLUTION: A self-adhesion part (for example, pressure sensitive double faced adhesive tape) 14 with a peelable film 13 temporarily adhered thereto is provided on a portion forming an opening part 11 so that the self-adhesion part forms no obstacles in storing a commodity, etc., and can be easily sealed only by peeling the peelable film after the storage, exposing the self-adhesion part, and butting edges of the opening part to each other. In manufacturing a plastic bad out of a strip-like film, the plastic can bag be easily obtained at a low cost by providing the self-adhesion part with the peelable film temporarily adhered thereto in advance on a portion forming the opening part of a bag area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic product in which an opening can be easily sealed so as to prevent the stored product or the like from popping out when the product or the like is stored and displayed at a store or brought back. It is about bags.

[0002]

2. Description of the Related Art A typical conventional plastic bag is shown in FIGS. FIG. 7A shows a flat bag HP having a hook hole H. FIG. This flat bag HP folds the band-shaped film F in two from the center in the width direction, and makes the bent side a the bottom,
A bag region HP 'having the opposite side b as an opening is defined, and the other two sides c and d except for the bottom of the bag region HP' and the two sides a and b serving as the opening are shown in FIG. Fusing along the alternate long and short dash line (there may be cutting after heat sealing), and punching a hole H near the opening M at the same time or at the same time as the fusing (the punching may be performed so that a punched piece remains). It was formed by:

[0003] Although not shown, the flat bag HP is formed by laminating two belt-like films, defining a bag region having one side as an opening, and fusing three sides (excluding heat) of the bag region except the opening. In some cases, cutting is performed after sealing), and in some cases, the hole is formed by punching a hole near the opening (in some cases, punching is performed so that a punched piece remains).

FIG. 8 (a) shows a self-standing bag GP having a hole H for hooking. This self-standing bag GP has a bag region G having a bent portion a as a bottom having a W-shaped cross section and an opposite side b as an opening when the band-shaped film F is folded in two from the center in the width direction.
P 'is defined, and the other two sides c and d, except for the two sides a and b serving as the bottom and the opening of the bag area GP', are blown (heat seal) as shown by a dashed line in FIG. In some cases, it may be cut afterwards), and both sides of the W-shaped bent portion are inverted c ′,
It is formed by fusing in a d 'shape and punching a handle hole H near the opening M at the same time or at the same time as the fusing.

[0005] The flat bag HP can be conveniently used for storing goods and the like and taking it back through the handhold hole H through a finger. The self-standing bag GP not only stores and brings back the goods and the like, but also has a three-dimensional opening. Therefore, it is excellent in that it can be displayed at a store in a state in which easily rolled goods or the like are stored, and a tray for display can be omitted.

[0006]

However, when the flat bag HP and the self-standing bag GP fall down when the bag is temporarily placed on a table or the like during take-out, the contents may jump out of the bag. Therefore, it is necessary to bind the opening M (around the lower edge of the handle hole H) using an adhesive tape or the like.

[0007] In order to perform binding using the above-mentioned adhesive tape, an instrument such as an adhesive tape drawer is required. Also, assuming the case of binding using adhesive tape, first, pull out an appropriate length of adhesive tape from the tape drawer, cut it, attach the cut tape piece to a fingertip such as a forefinger, and then open the bag. It is necessary to perform a procedure of abutting the parts M and manipulating the cutting tape pieces attached to the fingertips to bind the pieces, which is troublesome and troublesome for a purchaser or a shopkeeper.

An object of the present invention is to solve the above-mentioned problems at once, and an object of the present invention is to provide a plastic bag in which the opening of the bag can be easily bound and a method of manufacturing the same.

[0009]

In order to achieve the above-mentioned object, the present invention is characterized in that a self-adhesion part to which a release film is temporarily attached is provided at a location to be an opening, and stores goods and the like. At this time, it was constructed such that after storage, the release film was peeled off, the self-adhesion portion was exposed, and the opening portion was easily abutted.

The plastic bag according to the second aspect of the present invention is characterized in that the self-adhesive portion uses a double-sided adhesive tape, and the self-adhesive portion to which the release film is temporarily attached is simple. It was configured to be obtained.

Further, in the method for manufacturing a plastic bag according to the present invention, the belt-like film is folded in two from the center in the width direction (including a case where the film is folded into a W shape), and the folded side is set to the bottom. A bag region having an opening at the opposite side is defined, and two sides excluding the bottom and the opening of the bag region are blown to produce a plastic bag. A plastic bag manufactured by folding a strip-shaped film in two from the center in the width direction, characterized in that a self-adhesive portion to which a release film is temporarily attached in advance is provided.
The bag is configured such that the opening of the bag can be easily bound at a low cost.

Furthermore, in the method for manufacturing a plastic bag according to the invention, the two band-shaped films are overlapped to define a bag region having an opening on one side, and the opening of the bag region is defined. In producing a plastic bag by fusing the three sides excluding, a self-adhesive portion to which a release film is temporarily attached in advance is provided at a position to be an opening of a bag region of the band-shaped film before overlapping, and two sheets are provided. A plastic bag manufactured by laminating the band-shaped films described above, wherein the opening of the bag can be easily bound can be obtained easily and at low cost.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of the present invention will now be described with reference to FIGS.
Description will be made based on the embodiment shown in FIG. 1 and 2
Indicates a bag 10 of the present application (including a flat bag and a self-standing bag). The bag 10 of the present application is either one of the opposing surfaces 11a and 11b of the opening 11 having the handle hole 12 (the back surface 11a in the figure).
Is provided with a self-adhesion portion 14 to which a release film 13 is temporarily attached.

The adhesiveness of the self-adhering portion 14 is regulated (negative) when the release film 13 is temporarily attached, but the adhesiveness is restored by peeling the release film 13. Therefore, when the release film 13 is temporarily attached, the self-adhesive portion 14 does not hinder the storage of the product 15 and the like, and after the product is stored, the release film 13 is peeled off to expose the self-adhesive portion 14. If the opposing surfaces 11a and 11b of the opening 11 are brought into contact with each other after the adhesiveness is recovered, they can be easily and easily bonded without any trouble (binding).

The self-adhering portion 14 is formed by applying an adhesive, and temporarily attaching the release film 13 to the surface on which the adhesive is applied. The adhesive may be hot melt or cold melt. Alternatively, a commercially available double-sided adhesive tape may be used. When the double-sided pressure-sensitive adhesive tape is used, if the release film on one side is peeled off and attached, the self-adhesive portion 14 with the release film 13 temporarily attached can be easily obtained.

Although the self-attaching portion 14 is provided along the lower side of the handle hole 12 of the bag 10 of the present application in the case of the drawing, it may be provided along the upper side of the handle hole 12. Other parts,
For example, when the handle hole 12 is punched, it may be provided on a tongue piece (not shown) obtained by punching leaving the lower edge thereof. Further, the self-attaching portion 14 is linearly continuous in the illustrated case, but may be a single point or a continuous dot.

Next, the manufacturing process of the bag 10 having the self-attaching portion 14 will be described with reference to FIGS. 5 and 6 (in the present description, a flat bag is used for convenience). First, FIG.
As shown in (a), a center line (dashed-dotted line) a for folding the belt-like film F in the width direction is defined, and the bent side a is set as the bottom, and the opposite sides b and b are defined as the opening 11. Bag areas 10 'and 10 "(areas surrounded by a two-dot chain line n)
Is defined.

Next, the defined bag regions 10 'and 10 "
(The upper surface 11a in the figure)
In addition, as shown in FIG.
4 is formed in a continuous state.

Next, as shown in FIG. 6A, the strip-shaped film F is folded in two in the width direction from the center line a, and the two-dot chain line n defining the bag regions 10 'and 10 "as described above and the release film. A through hole 16 is provided at the intersection K with the self-attaching part 14 to which the tentatively attached part 13 is attached.
At the same time or afterwards along the two-dot chain line n. By forming the through holes 16, both ends of the release film 13 are formed for each bag, and can be easily removed.

The bag region 1 is cut by the fusing from the two-dot chain line n.
As shown in FIG. 3B, 0 ′ and 10 ″ are separated from each other as a bag 10 of the present application.
And the other two sides c and d excluding the bottom and the opening. Simultaneously with or at the same time as the fusing, the handle hole 12 is punched near the opening 11 (punching may be performed so that a punched piece remains).

In the above description, "fusing" refers to cutting the overlapped film and melting and fixing the cut portion at the same time. However, the result is the same when cutting after heat sealing, and is synonymous with fusing. thinking.

The bag 10 of the present invention (including a flat bag and a self-supporting bag) can of course be applied to a handbag type bag used in a superstore or a convenience store.

Further, as the belt-shaped film F, a film mainly composed of a polypropylene resin or a polyethylene resin is preferably used, but the use of other plastic films is not limited.

[0024]

As described above, the present invention is characterized in that a self-adhesion part to which a release film is temporarily attached is provided at a position to be an opening, and the self-adhesion part to which a release film is temporarily attached is a product. If it does not become a hindrance when storing such as, after storing, peeling off the release film and exposing it to recover the adhesive strength, butting the openings,
This provides an excellent effect that the opening can be easily bound by anyone.

Further, the plastic bag according to the second aspect of the present invention is characterized in that the self-adhesive portion utilizes a double-sided adhesive tape, so that the self-adhesive portion can be easily obtained. It has excellent effects.

Further, according to a third aspect of the present invention, there is provided a method for manufacturing a plastic bag, comprising: folding the strip-shaped film in two from the center in the width direction, setting the bent side as a bottom, and the opposite side as an opening. When producing a plastic bag by fusing two sides excluding the bottom and the opening of the bag region,
Since the self-adhesive portion to which the release film is temporarily attached in advance is provided at a position to be an opening of the bag region of the band-shaped film before folding, the plastic film manufactured by folding the band-shaped film in two from the center in the width direction. This is an excellent effect that a bag, in which the opening of the bag can be easily bound, can be obtained easily and at low cost.

Further, in the method for manufacturing a plastic bag according to the present invention, two bag-like films are overlapped to define a bag region having one side as an opening, and the opening of the bag region is defined. In producing a plastic bag by fusing the three sides excluding, since it is characterized by providing a self-adhesive portion to which a release film is temporarily attached in advance at a location to be an opening of the bag region of the band-shaped film before being stacked, This is an excellent effect that a plastic bag manufactured by stacking two belt-like films so that the opening of the bag can be easily bound can be obtained easily and at low cost.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of a bag of the present application (flat bag).

FIG. 2 is a partially cutaway perspective view of the present application bag (self-supporting bag).

FIG. 3 is a cross-sectional view showing a state where an opening of a bag of the present application (flat bag) is bound.

FIG. 4 is a cross-sectional view showing a state in which an opening of the present application bag (self-supporting bag) is bound.

FIG. 5 is an explanatory diagram showing a first stage of a manufacturing process of the present application bag (flat bag).

FIG. 6 is an explanatory view showing a latter stage of the manufacturing process of the present application bag (flat bag).

FIG. 7A is an explanatory view showing a conventional flat bag, and FIG. 7B is an explanatory view showing one manufacturing process.

8A is an explanatory view showing a conventional self-standing bag, and FIG. 8B is an explanatory view showing one manufacturing process thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Application bag 11 (M) Opening 12 (H) Handle hole 13 Release film 14 Self-adhesive part 15 Product etc. 16 Through hole F Band-shaped film K Intersection a Fold side b Opposite side c, d Bottom and opening Excluding other two sides

Claims (4)

[Claims] 1. A plastic bag, wherein a self-adhesion part to which a release film is temporarily attached is provided at a location to be an opening. 2. The plastic bag according to claim 1, wherein the self-adhesive portion uses a double-sided adhesive tape. 3. The bag-shaped film is folded in two from the center in the width direction, a bag region having the bent side as a bottom and an opening at an opposite side is defined, and two sides excluding the bottom and the opening of the bag region are formed. In producing a plastic bag by fusing, a self-adhesive portion to which a release film is temporarily attached in advance is provided at a position to be an opening of a bag region of the band-shaped film before being folded. Method. 4. A method for manufacturing a plastic bag by laminating two strip-shaped films, defining a bag region having one side as an opening, and fusing three sides excluding the opening of the bag region to produce a plastic bag. A self-adhesive portion to which a release film is temporarily attached in advance at a position to be an opening of a bag region of the band-shaped film.