JP2003238918A - Pressure-sensitive adhesive tape - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressure-sensitive adhesive tape which, regarding a commodity packaging bag with a mouth-sealing tongue provided with a pressure- sensitive adhesive, unnecessitates the operation of removing a release paper for the pressure-sensitive adhesive of the commodity packaging bag at the time of depositing goods. <P>SOLUTION: A film or sheet made of a thermoplastic synthetic resin with a width of about 20 mm - about 100 mm is formed into a long strip tape, a pressure-sensitive adhesive layer is provided on the one surface of this tape in the width direction of the long strip tape as a 40%-60% occupation area, and in addition a release varnish layer is provided on the adjacent locations as a 60%-40% occupation area. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-sensitive adhesive tape which is convenient for sealing a product packaging bag or the like.

[0002]

2. Description of the Related Art In a conventional product packaging bag, since a product insertion opening is opened and closed by a sealing tongue, a pressure-sensitive adhesive layer is provided either on the inside of the sealing tongue or on the outer surface of the product insertion opening. It is widely used that a release paper is provided on the pressure-sensitive adhesive layer, and the release paper is peeled off and sealed with a pressure-sensitive adhesive when the product is sealed after the product is stored. In the conventional product packaging bag, the release paper attached to the pressure-sensitive adhesive must be removed when the product is put into the opening, and the removed release paper must be discarded as garbage. There is a drawback that it is inconvenient for the subsequent sealing work. Furthermore, with the release paper attached, during the automatic packaging process,
The release paper is peeled off carelessly, and it is difficult to mechanically remove the peeled release paper.

[0003]

SUMMARY OF THE INVENTION The present invention relates to a product packaging bag which is sealed with a pressure-sensitive adhesive and does not require an operation of removing the release paper on the pressure-sensitive adhesive when the product is put into the opening. It provides a packaging bag.

[0004]

According to the present invention, a tape provided with a pressure-sensitive adhesive layer and a release varnish layer is attached to a part of a sealing tongue piece to form a release paper on the pressure-sensitive adhesive tape itself. The present invention has been completed, focusing on the fact that the drawbacks of the above-described conventional product packaging bags can be improved by retaining the function.

That is, the present invention comprises the following items. (1) A thermoplastic synthetic resin film or sheet having a width of about 20 mm to about 100 mm is formed into a long strip tape, and a pressure-sensitive adhesive layer is 40% on one side of the tape in the width direction of the long strip tape. To 60% of the total area, and 60% to 40% of the area of the peeling varnish adjacent to the pressure-sensitive adhesive tape. (2) The pressure-sensitive adhesive tape according to claim 1, wherein a non-laminated portion of 1 mm to 5 mm is provided between the pressure-sensitive adhesive layer and a peeling varnish layer located adjacent to the pressure-sensitive adhesive layer.

[0006]

DETAILED DESCRIPTION OF THE INVENTION The present invention has a width of about 20 millimeters to about 10.
A thermoplastic synthetic resin film or sheet of about 0 mm is formed into a long strip tape, and a pressure-sensitive adhesive layer is provided on one side of the tape in the width direction of the long strip tape in an amount of 40% to 60%.
The pressure-sensitive adhesive tape provided with a release varnish layer in an adjacent area at an area of 60% to 40% is provided at the tip of the tongue for sealing the product packaging bag. Part of the adhesive layer is joined, and the release varnish layer at the adjacent position is folded back toward the pressure-sensitive adhesive layer and polymerized. This eliminates the need to remove the release paper on the pressure-sensitive adhesive when the product is loaded, which speeds up the work time and reduces the manufacturing cost of the product. . Moreover,
Since it does not generate dust, which is called release paper, during the work, the packaging form is environmentally friendly.

The present invention will be described below in detail with reference to the accompanying drawings. However, the pressure-sensitive adhesive tape of the present invention is not limited to the shape of the product packaging bag.

1 and 2 are a plan view and a sectional view of a pressure-sensitive adhesive tape. The thermoplastic synthetic resin film or sheet 1 is, for example, a resin film such as polypropylene, polyethylene, ethylene vinyl acetate copolymer, styrene-butylene copolymer, acrylic resin, nylon or PET, and a laminated film of these synthetic resin films. It can be used preferably.

The pressure sensitive adhesive layer 3 is made of, for example, acrylic resin,
Polyurethane type, hot melt type, emulsion type and natural type adhesives are widely known, but the present invention is not particularly limited.

As the peeling varnish layer 4, those having a known peeling function such as silicon and peeling ink can be preferably used.

The plain layer 5 is located between the pressure-sensitive adhesive layer 3 and the peeling varnish layer 4, and a pressure-sensitive adhesive tape is bonded to the product packaging bag, and the pressure-sensitive adhesive layer 3 and the peeling varnish layer 4 are folded back. However, even if any of the pressure-sensitive adhesive layer and the peeling varnish layer is shaken back, it plays a role of finishing within an appropriate allowable range.

Examples in which the pressure-sensitive adhesive tape 1 is bonded to the tongue piece portion 7 of the product packaging bag 6 are shown in FIGS. 3, 5, 6, and 8. The product packaging bag 6 can be provided regardless of whether the product inlet 10 is provided on the upper side or the lower side. Further, the presence or absence of the gusset portion 11, the header portion 12 of the product packaging bag, the header seal portion, the hanging hole portion 13 and the like can be freely selected.

An example in which the pressure-sensitive adhesive tape 1 is polymerized by the folded portion 9 between the pressure-sensitive adhesive layer and the release varnish layer is shown in FIGS. This is the state immediately before the work of inserting the product 16.

FIG. 9 shows an embodiment in which the product 16 is loaded through the loading port 10 and the pressure-sensitive adhesive tape is attached to the product packaging bag 6 and sealed.

[0015]

The present invention can achieve the following effects by the above description. (1) The manufacturing cost can be reduced by eliminating the need for the work and equipment for the conventional disposal of release paper. (2) The sealing work after the product is put in becomes simple, and it is convenient because it can be repeatedly opened and closed for taking out the product.

[Brief description of drawings]

FIG. 1 is a plan view of a pressure sensitive adhesive tape.

FIG. 2 is a cross-sectional view of a pressure sensitive adhesive tape.

FIG. 3 is a cross-sectional view of a state in which a pressure-sensitive adhesive tape is joined to a product packaging bag (on the inlet, with a gusset).

FIG. 4 is a cross-sectional view of a state in which a pressure-sensitive adhesive tape is joined to a product packaging bag (on the inlet, with a gusset), and the tape is folded back and polymerized.

FIG. 5 is a plan view in which a pressure-sensitive adhesive tape is joined to a product packaging bag (on the inlet, with a gusset).

FIG. 6 is a cross-sectional view showing a state in which a pressure-sensitive adhesive tape is joined to a product packaging bag (under a charging port, with a header portion, and with a hanging hole).

FIG. 7 is a view showing a pressure-sensitive adhesive tape joined to a product packaging bag (under a charging port, with a header portion, with a hanging hole),
It is a sectional view of the state where the tape was folded back and polymerized.

FIG. 8 is a plan view in which a pressure-sensitive adhesive tape is joined to a product packaging bag (under a loading port, with a header portion, with a hanging hole).

FIG. 9 is a cross-sectional view showing a state in which a product is put in a product packaging bag, the pressure-sensitive adhesive tape is peeled off by folding back, and the product is sealed.

[Explanation of symbols]

1 Pressure-sensitive adhesive tape 2 Thermoplastic synthetic resin film or sheet 3 Pressure-sensitive adhesive layer 4 peeling varnish layer 5 plain layers 6 product packaging bags 7 tongue 8 Pressure sensitive adhesive tape and tongue joint 9 Folded part of pressure sensitive adhesive tape 10 input ports 11 Gazette part 12 Header of product packaging bag 13 Hanging hole 14 Header seal part 15 Fusing Welding seal part 16 products

Claims (2)

[Claims] A thermoplastic synthetic resin film or sheet having a width of about 20 mm to about 100 mm is formed into a long strip tape, and a pressure-sensitive adhesive layer is provided on one side of the tape in the width direction of the long strip tape. Occupying an area of 40% to 60%, and a varnish layer of 60% to 40% in the adjacent position.
Pressure-sensitive adhesive tape provided as an area occupied by. 2. A plain layer having a thickness of 1 to 5 mm is provided between the pressure-sensitive adhesive layer and a release varnish layer located adjacent to the pressure-sensitive adhesive layer.
The pressure-sensitive adhesive tape described.