JPH0123519B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing an adhesive tape.

[Prior art and its problems]

Adhesive tape uses paper coated with a release agent such as silicone on one side, and the untreated side coated with adhesive is wound into a roll and then cut to the specified width. It was common to manufacture it by

However, in the case of these conventional manufacturing methods, the adhesive solution was directly applied to the untreated surface of the paper, which has excellent solvent absorption, in other words, the "direct coating" method was used. For example, if the adhesive used is an acrylic emulsion or a solvent type, the water or solvent used to dissolve the adhesive will rapidly penetrate the paper surface and cause the paper to curl. In addition, in this method, the adhesive to be applied quickly penetrates into the paper surface, making it difficult to control the amount of adhesive applied. It has been pointed out that there is an uneconomical problem in that a large amount of adhesive is applied.

Furthermore, in the case of conventional adhesive tapes, a release agent such as silicone is applied to the back side of the paper, so even if the tapes are overlapped during use, the adhesive effect cannot be achieved at the overlapped part of the tape. In addition to this drawback, there are also drawbacks such as the inability to write on the silicone coated surface.
In addition, many drawbacks have been pointed out, such as when packages packed using these tapes are stacked one on top of the other, the silicone surface is slippery, causing the packages to collapse.

[Purpose of the invention]

In view of the above-mentioned circumstances, the present invention is aimed at solving these problems.The present invention is designed to prevent the paper used from curling and to reduce the amount of adhesive used for adhesion. It is an object of the present invention to provide an extremely economical method of manufacturing an adhesive tape that requires only a minimum amount.

Another object of the present invention is to make it possible to apply tapes over each other when in use, and to make it possible to apply tapes on the back side of the tape (the surface that becomes the front surface during application).
An object of the present invention is to provide a method for producing an adhesive tape on which characters can be written freely.

Still another object of the present invention is to provide a method for producing an adhesive tape that prevents stacked packages from collapsing by making the back surface of the tape less likely to slip during packaging. It is something to do.

[Key points of the invention]

This invention involves rolling a piece of kraft paper having a predetermined width and length, which is integrally laminated with a thin film of polyethylene sheet on one side, and coated with an acrylic emulsion or solvent type adhesive on the laminated surface. A method in which the paper is wound up into a shape, left for a certain period of time for aging, and then rolled out, and during this rolling out, the applied adhesive is transferred and adhered to the paper surface at a position opposite to the laminate surface by polymerization. is the main point of the invention.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

The adhesive tape of the present invention is manufactured using kraft paper 1 laminated with a polyethylene thin film 2 on one side, and an adhesive 3 is applied and integrated on the laminated surface of the polyethylene thin film 2.

Adhesive 3 applied to the top surface of polyethylene thin film 2
uses acrylic emulsion or solvent type adhesive.

The reason why acrylic emulsion or solvent type adhesives are used is because the so-called "legs" of the adhesive are long, so once applied, it is easy to transfer and adhere the adhesive to other surfaces. Depending on the adhesive with short "legs", it is difficult to expect transfer adhesion effects to other surfaces.

The kraft paper 1 for manufacturing the adhesive tape uses a known paper sheet having a certain width and length, and is manufactured by using, for example, kraft paper with a width of 2 m and a length of 20 m.

The paper 1 coated with the adhesive 3 is rolled to a certain thickness and then left overnight to undergo aging.

The reason for aging is to scatter water or solvent mixed in to dissolve the adhesive.

In the rolled paper 1 that has been aged, the solvent mixed in the adhesive 3 scatters and transfers and adheres to the opposite surface (the surface opposite to the coated surface) of the paper 1 in a polymerized state.

When the roll-shaped paper 1, which has undergone the above-mentioned transfer due to aging, is unfolded, the adhesive 3 applied to the laminated surface of the polyethylene thin film 2 has completely moved to the opposite surface, and as the adhesive has transferred, it is firmly attached to the non-laminated surface. adhere to.

The unfolded paper 1 is rolled again with the side to which the adhesive 3 is attached (the side to which the polyethylene thin film 2 is not laminated) facing inside to make a roll of the desired thickness, and then rolled to the required width. Cut to complete the product.

〔Effect of the invention〕

The effects of the present invention described above are as follows.

(1) The adhesive 3 applied to the top surface of the polyethylene thin film 2 can be transferred and adhered to other surfaces very easily, and manufacturing is simple.

That is, during manufacturing, the adhesive 3 once applied to the laminate surface of the polyethylene thin film 2 is in an extremely unstable state because it is applied to the surface of the polyethylene thin film 2, which has a peeling effect. Since the surface on which the polyethylene thin film 2 is not laminated has not been specially treated, the adhesive 3 can be easily absorbed and adhered to the surface, so the adhesive 3 after aging, where the solvent and water are scattered, is in a polymerized state. Transfer adhesion can easily occur on the opposing surface of the substrate 1, and transfer adhesion can be easily carried out without any special operation for transfer.

(2) The manufacturing method is simple and can be provided at low cost.

(3) During manufacturing, the adhesive was not applied directly, but was applied to the laminate surface of the polyethylene thin film 2 and then transferred and adhered, so it was used to dissolve the adhesive on the untreated surface of the kraft paper. The disadvantages of conventional methods caused by rapid penetration of water and solvents, such as curling of tape paper and the uneconomical need to apply more adhesive than necessary, can be completely eliminated. I was able to solve it.

(4) Since the manufactured adhesive tape has a polyethylene thin film 2 instead of a slippery material such as silicone on the surface that becomes the surface during adhesion, it is possible to apply the tape in layers and exhibit a strong adhesive effect.

In addition, unlike silicone coatings, there is no slippage, so it is possible to stack items one on top of the other, and there is no possibility of items collapsing.

(5) It is possible to write characters on the surface of the manufactured tape.

[Brief explanation of drawings]

The figures show the method of the present invention; FIG. 1 is a side view showing a part of the paper curled during application of the adhesive; FIG. 2 is an enlarged sectional view showing the state of polymerization of paper during rolling; FIG. 3 is an enlarged sectional view showing the state of adhesive transfer and adhesion. 1...Kraft paper, 2...Polyethylene thin film, 3...
glue.

Claims (1)

[Claims] 1. A piece of kraft paper having a predetermined width and length and integrally laminated with a thin film of polyethylene sheet on one side is coated with an acrylic emulsion or solvent-type adhesive and wound into a roll. The adhesive is removed, left for a certain period of time for aging, and then developed, and during this development, the applied adhesive is transferred and adhered to the paper surface at a position opposite to the laminate surface by polymerization. A method for manufacturing adhesive tape.