JP2001072948A - Sealing pressure-sensitive adhesive tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure-sensitive adhesive tape whose strippable paper can easily be peeled from an adhesive layer. SOLUTION: In a sealing pressure-sensitive adhesive tape obtained by forming adhesion layers 4 and 5 on one side of a sheet and allowing strippable papers 6 and 8 to stick thereon, non-adhesion portions 3 and 3 are formed between the upper adhesion layer 4 and the lower adhesion layer 5 on the sheet 2 and the upper strippable paper 6 and the lower strippable paper 8 which stick to the adhesion layers 4 and 5, respectively are provided with covering portions 7 and 9, respectively, in superposed relation with the non-adhesion portions 3 and 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing pressure-sensitive adhesive tape used for temporarily fixing an opening of a packaging bag, for example.

[0002]

2. Description of the Related Art FIGS. 7 and 8 show a known structure for sealing an opening of a packaging bag for accommodating articles such as clothes. 7 and 8, a sealing adhesive tape 20 has an adhesive layer 22 formed on one entire surface of a horizontally long sheet 21, and the adhesive layer 22 is separated vertically. Papers 23 and 24 are overlapped and adhered, and the adhesive tape 20 first peels off the lower release paper 24 from the adhesive layer 22 and opens the upper opening 26 to accommodate the articles in the packaging bag 25. Is exposed to the upper surface from the back side and is adhered. Then, the upper stripping paper 23 is peeled off from the adhesive layer 22, and the packaging bag 25 is bent up and down at an appropriate position on the upper side, and adhered to the front surface of the packaging bag 25. The adhesive layer 22 of the tape 20 is adhered.

In the above-mentioned adhesive tape, the adhesive layer is formed over the entire surface of the sheet, so that the adhesive tape has a strong adhesive force with the peeling paper, and the peeling paper has no place to be picked with a finger and is peeled off from a corner. It took time and was not satisfactory.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a pressure-sensitive adhesive tape which can easily peel off a release paper from an adhesive layer.

[0005]

According to the present invention, there is provided a sealing adhesive tape in which an adhesive layer is formed on one surface of a sheet, and a peeling paper is adhered to the adhesive layer, wherein the sheet has an upper adhesive layer. A non-adhesive portion is formed between the lower adhesive layer and the lower adhesive layer, and the upper stripping paper and the lower stripping paper that adhere to each adhesive layer are provided with a covering portion that vertically overlaps the non-adhesive portion.

According to a second aspect of the present invention, in the sealing adhesive tape, the non-adhesive portion is entirely covered with a covering portion of both stripping papers.

In a third aspect of the present invention, the non-adhesive portion has a central portion exposed to the outside, and only the upper and lower sides are covered with the covering portions of both stripping papers.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. The adhesive tape 1 of the present invention is shown in FIG.
As shown in FIG. 2, an adhesive formed in a band shape continuously from the left end to the right end at approximately the center of the upper and lower sides on one surface of a sheet 2 made of a well-known material such as paper or non-woven fabric with an appropriate width and length. A non-adhesive portion 3 not applied and an upper adhesive layer 4 and a lower adhesive layer 5 to which an adhesive such as a thermoplastic resin material is applied are divided into upper and lower sides of the non-adhesive portion 3. The upper and lower adhesive layers 4 and 5 are adhered with transparent or colored extremely thin and tough upper stripping paper 6 and lower stripping paper 8, respectively, so that the adhesive layers 4, 5 and the central part are not bonded. The portion 3 is covered so as not to be exposed on the surface, and is protected from being contaminated by foreign substances or the like. The non-adhesive portion 3 is formed to be narrower than the upper and lower adhesive layers 4, 5.
And the covering portion 9 of the lower stripping paper 8 are vertically overlapped.

As shown in FIG. 3, the packaging bag 10 has a required volume of transparent or colored synthetic resin sheet.
The lower stripping paper 8 is peeled off from the adhesive tape 1 and adheres to the upper back side of the opening 11 which is opened at the top to accommodate articles. At this time, since the covering portion 9 vertically overlaps the non-adhesive portion 3 of the lower stripping paper 8, the covering portion 9 can be easily peeled off by picking it with a finger. In addition,
In this case, the non-adhesive portion 3 may be exposed between the opening 11 and the upper stripping paper 6.

Next, an operation of packing articles such as clothes into the packaging bag 10 through the opening 11 is performed. Since the upper adhesive layer 4 of the adhesive tape 1 is entirely covered and protected by the upper stripping paper 6, During the operation, the finger or the article does not adhere to the upper adhesive layer 4, and the operation is performed smoothly.

After the packing of the articles is completed, the upper stripping paper 6 is peeled off from the upper adhesive layer 4. In this case, too, the covering portion 7 of the upper stripping paper 6 overlaps the non-adhesive portion 3 vertically. If the covering portion 7 is picked up with a finger and pulled, it can be easily peeled off. Next, the packaging bag 10 is folded up and down at an appropriate upper position, and the upper adhesive layer 4 of the adhesive tape 1 is adhered to the front of the packaging bag 10 to seal the opening 11.

FIGS. 5 and 6 show an adhesive tape according to another embodiment. The adhesive tape 1a of this embodiment includes upper and lower peeling papers 6a and 8 on the upper and lower adhesive layers 4a and 5a.
When a is adhered, the non-adhesive portion 3a is exposed on the surface. In this embodiment, the upper and lower strips 6a, 8a
Since the covering portions 7a and 9a are vertically overlapped with the non-adhesive portion 3a, the covering portions 7a and 9a can be easily peeled off from the adhesive layers 4a and 5a by picking the covering portions 7a and 9a with a finger.

[0013]

According to the present invention, there is provided an adhesive tape for sealing wherein an adhesive layer is formed on one surface of a sheet and a peeling paper is adhered to the adhesive layer. The upper stripping paper and the lower stripping paper that form the adhesive portion and adhere to each adhesive layer are provided with a coating portion that vertically overlaps the non-adhesive portion, so that when the peeling paper is peeled from the adhesive layer, the coating portion is formed. Can be easily peeled off from the adhesive layer by pinching, and workability can be greatly improved.

According to the second aspect, since the non-adhesive portion is usually covered with the covering portion of the peeling paper, foreign matters and the like do not adhere to and become dirty.

In the third aspect, since the non-adhesive portion is always exposed, it is easy to pinch a finger on the covering portion of the peeling paper.

[Brief description of the drawings]

FIG. 1 is a front view of an adhesive tape.

FIG. 2 is a sectional view of an adhesive tape.

FIG. 3 is an explanatory view of a state where an adhesive tape is adhered to a packaging bag.

FIG. 4 is an explanatory view of a state where an opening of FIG. 3 is sealed.

FIG. 5 is a front view of an adhesive tape according to another embodiment.

FIG. 6 is a cross-sectional view of the pressure-sensitive adhesive tape of FIG.

FIG. 7 is a sectional view of a conventional adhesive tape.

8 is an explanatory view of a state where the adhesive tape of FIG. 7 is adhered to a packaging bag.

[Explanation of symbols]

 1, 1a Adhesive tape 2 Sheet 3, 3a Non-adhesive part 4, 4a Upper adhesive layer 5, 5a Lower adhesive layer 6, 6a Upper peeling paper 7, 7a, 9, 9a Covering part 8, 8a Lower peeling paper

Claims (3)

[Claims] An adhesive tape for sealing wherein an adhesive layer is formed on one side of a sheet and a peeling paper is adhered to the adhesive layer,
The sheet forms a non-adhesive portion between the upper adhesive layer and the lower adhesive layer, and the upper stripping paper and the lower stripping paper that adhere to each adhesive layer are provided with a covering portion that vertically overlaps the non-adhesive portion. Adhesive tape for sealing characterized by the above-mentioned. 2. The adhesive tape for sealing according to claim 1, wherein the non-adhesive portion is entirely covered with a covering portion of both stripping papers. 3. The pressure-sensitive adhesive tape according to claim 1, wherein the non-adhesive portion has a central portion exposed to the outside and only upper and lower sides are covered with a covering portion of both stripping papers.