JPH07324182A - Production of double-coated self-adhesive tape - Google Patents

Abstract

PURPOSE:To produce at a high productivity a double-coated self-adhesive tape which is free from wrinkles on the fabric substrate and has a stable sticking power and a good appearance. CONSTITUTION:A rubber-base self-adhesive layer 11 formed on one side of a process paper 1 by hot-melt coating is stuck to the synthetic resin film side of a fabric substrate 2 under pressure, and the resulting laminate is wound up with the substrate 2 outside, thus giving a semifininshed product 4. The product 4 is unwouwnd with the substrate 2 upperside and is stuck under pressure to an acrylic self-adhesive layer 51 formed on one side of a release paper which is supplied with the self-adhesive layer at the side facing the substrate 2. Then, the release paper 5 is peeled off, and the resulting product comprising the process paper 1 and a double-coated self-adhesive tape laminated thereto is wound up with the process paper 1 outside, thereby giving a product 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a double-sided pressure-sensitive adhesive tape, which is suitable for applying a rug such as carpet to a floor.

[0002]

2. Description of the Related Art As a double-sided adhesive tape used for constructing a carpet or the like on the floor, it is disclosed in Japanese Utility Model Publication No. 60-23291.
In the publication, a double-sided pressure-sensitive adhesive tape is described in which a rubber-based pressure-sensitive adhesive layer is provided on the plastic film side of a cloth substrate on which plastic films are laminated, and an acrylic-based pressure-sensitive adhesive layer is provided on the other surface.

In the above-mentioned publication, the thickness of the rubber-based pressure-sensitive adhesive layer is maintained by the plastic film, the rubber-based pressure-sensitive adhesive layer is plastically deformed and penetrates between the fibers of the rug to firmly adhere to the rug, Since the pressure-sensitive adhesive layer has a large cohesive force, it is difficult for the pressure-sensitive adhesive layer to remain on the floor even if it is peeled off from the floor, and thus the pressure-sensitive adhesive layer has such a structure.

Conventionally, in order to manufacture the above-mentioned double-sided adhesive tape, the rubber-based adhesive layer formed on the surface of the process paper is attached to the plastic film surface of the cloth substrate, and this is wound up with the process paper on the outside. Was carried out again, the acrylic pressure-sensitive adhesive layer separately formed on the release paper surface was attached to the other surface of the cloth base material, and the release paper was peeled off and the process paper was wound on the outside. .

[0005]

According to the above-mentioned conventional manufacturing method, since the rubber adhesive layer is attached to the plastic film surface of the cloth base material together with the process paper, the process paper is wound outside. The cloth base material is wound in contact with the back surface of the lower process paper without receiving tension. The rubber-based pressure-sensitive adhesive layer shrinks as it cools, and the soft cloth substrate that is thinner than the process paper shrinks in the lengthwise direction as the pressure-sensitive adhesive layer shrinks, resulting in the widthwise direction of the pressure-sensitive adhesive tape. Wrinkles occur.
Since the cloth base material is in contact with the back surface of the process paper, it is slippery and promotes the generation of wrinkles. If the above-mentioned roll is unrolled and an acrylic pressure-sensitive adhesive layer is laminated on the other surface of the cloth substrate, air bubbles are likely to be caught in the wrinkles, the adhesive strength becomes unstable, and the appearance becomes poor.

Therefore, if the rubber-based pressure-sensitive adhesive layer on the paper surface of the process sheet is sufficiently cooled and then attached to the cloth base material and wound up, the above problems are reduced. However, since it takes a long time for cooling, there is a problem that productivity is extremely deteriorated.

The present invention solves the above-mentioned conventional problems and provides a method for producing a double-sided pressure-sensitive adhesive tape, which is capable of producing a double-sided pressure-sensitive adhesive tape having a wrinkle-free cloth base material, a stable adhesive force, and a good appearance with good productivity. The purpose is to provide.

[0008]

The method for producing a double-sided pressure-sensitive adhesive tape according to the present invention comprises a rubber-based pressure-sensitive adhesive layer formed on a process paper surface on a synthetic resin film side of a cloth substrate having a synthetic resin film laminated on one side. It is attached together with the process paper, and this is wound up with the cloth base material as the outside to make a semi-finished product. Next, while unwinding the semi-finished product, the acrylic pressure-sensitive adhesive layer separately formed on the release paper surface It is characterized in that it is adhered to the surface of and the peeling paper is peeled off.

As the cloth substrate used in the present invention, suf,
A woven or non-woven fabric made of fibers of cotton, polyester, nylon, vinylon or the like is used, and examples of the synthetic resin film laminated on one side thereof include those made of polyethylene, polypropylene and ethylene-vinyl acetate copolymer.

As the process paper, usual ones such as those laminated with polyethylene on a paper base and further treated with silicone, those treated with polyethylene terephthalate film and the like are used, but those having good heat resistance are preferable. .

Since the rubber-based pressure-sensitive adhesive used in the present invention is a hot-melt type, it is applied to process paper in a state of being melted by heating at about 150 ° C. This is taken up after passing through a cooling roll, but at this time the cooling is insufficient, and further cooling proceeds in the state of being wound into a roll and the pressure-sensitive adhesive layer shrinks. However, since the cloth base material is wound with the cloth base material outside, the cloth base material receives tension in the longitudinal direction due to the circumferential difference between the cloth base material and the process paper, and the adhesive layer does not shrink.

The application of the rubber-based pressure-sensitive adhesive to the process paper and the coating of the acrylic-based pressure-sensitive adhesive on the release paper may be performed using a normal roll coater. The preferable thickness of the rubber-based pressure-sensitive adhesive layer is 100 to 300 μm, and the preferable thickness of the acrylic-based pressure-sensitive adhesive layer is 30 to 100 μm.

[0013]

[Function] Since the cloth base material laminated on the rubber-based pressure-sensitive adhesive layer formed on the process paper is wound outside together with the process paper, the cloth base material is subjected to tension in the longitudinal direction of the pressure-sensitive adhesive tape, and therefore the rubber-based pressure-sensitive adhesive layer. Even when it shrinks, the cloth substrate does not shrink and wrinkles do not occur. Therefore, even if the rubber-based pressure-sensitive adhesive layer is insufficiently cooled, the double-sided pressure-sensitive adhesive tape can be manufactured without generating wrinkles on the cloth base material, and thus the productivity is good.

[0014]

The method for producing the double-sided adhesive tape of the present invention will now be described with reference to the drawings. 1 and 2 are cross-sectional views showing an embodiment of the present invention, in which FIG. 1 is a step of laminating a rubber-based pressure-sensitive adhesive layer 11 formed on a process paper 1 surface to a synthetic resin film surface 21 of a cloth base material 2. Indicates. The rubber adhesive layer 11 is formed on one side of the process paper 1 by hot melt coating,
1 is conveyed upward, and the cloth base material 2 laminated with the synthetic resin film 21 is supplied so that the surface of the synthetic resin film 21 faces the rubber-based pressure-sensitive adhesive layer 11 side. After pressure-bonding and laminating, the cloth base material 2 was placed outside and wound up to obtain a semi-finished product 4.

As shown in FIG. 2, the semi-finished product 4 is fed out so that the cloth base material 2 faces upward, and the acrylic pressure-sensitive adhesive layer 5 is formed.
The release paper 5 on which No. 1 was formed was supplied so that the acrylic pressure-sensitive adhesive layer 51 was on the cloth substrate 2 side, and these were pressure-bonded and laminated by the pressure-bonding rolls 3 and 3. Subsequently, the release paper 5 having the acrylic pressure-sensitive adhesive layer 51 laminated thereon is peeled and removed, and the process paper 1
The double-sided pressure-sensitive adhesive tape laminated on was rolled up with the process paper 1 on the outside to obtain a product 6. 3 is an A section of FIG. 1, FIG. 4 is a B section of FIG. 1, and FIG. 5 is an enlarged sectional view of a C section of FIG.

The materials used in the above examples are as follows. Process paper (double-sided release paper): Fujimori Kogyo Co., Ltd., product name: 70N
518T rubber adhesive is the following formulation. Styrene-isoprene-styrene copolymer 80 Natural rubber 20 Arakawa Chemical Co., Ltd. product name: Alcon P100 70 (blending amount is parts by weight) Acrylic adhesive: Adhesive (Soken Chemical Co., Ltd., SK-17
17) and a curing agent (manufactured by Nippon Polyurethane Industry Co., Ltd., trade name: Coronate L55E) in a weight ratio of 100: 1. Fabric base material: Polyethylene terephthalate woven fabric extruded and laminated with polyethylene.

The rubber-based pressure-sensitive adhesive in a molten state at 150 ° C. was coated on the surface of the process paper with a thickness of 200 μm using a die coater. The acrylic pressure-sensitive adhesive was applied to the release paper surface by comma roll and dried.

(Comparative Example 1) The process base material 1 with the cloth base material 2 inside
A double-sided pressure-sensitive adhesive tape was obtained in the same manner as in the example, except that the semi-finished product 4 was placed outside.

(Comparative Example 2) An acrylic pressure-sensitive adhesive layer was formed on release paper and attached to a cloth base material, and a semi-finished product was wound with the cloth base material on the outside. Next, apply a rubber adhesive to the process paper with hot-melt, laminate the rubber adhesive layer on the synthetic resin film surface of the cloth base material, remove the release paper from the acrylic adhesive layer, and put the process paper on the outside. A double-sided pressure-sensitive adhesive tape was obtained.

(Comparative Example 3) A double-sided pressure-sensitive adhesive tape was obtained in the same manner as in Comparative Example 2 except that the semi-finished product was wound with the release paper on the outside.

The double-sided pressure-sensitive adhesive tapes obtained in the above-mentioned Examples and Comparative Examples 1 to 3 were examined for the wrinkle occurrence state observed in the roll-shaped semi-finished product and the wrinkle occurrence location in the product having a length of 15 m. Shown in 1.

[0022]

[Table 1]

As is apparent from Table 1, the semi-finished product of the example had no wrinkles, and the product had wrinkles at only 5 points within 15 m. On the other hand, the products of Comparative Examples 1 to 3 had many wrinkles in the product.

[0024]

The method for producing the double-sided pressure-sensitive adhesive tape of the present invention has the above-mentioned constitution, and since the cloth base material stuck to the rubber-based pressure-sensitive adhesive layer is wound outside, the cloth base material is free from wrinkles. It is possible to obtain a double-sided pressure-sensitive adhesive tape with stable appearance and stable appearance when it is made into a product, without bubbles being entrapped between the other surface of the cloth base material and the acrylic pressure-sensitive adhesive layer laminated on it. it can.

[0025]

[Brief description of drawings]

FIG. 1 is a side view showing a method for producing a double-sided adhesive tape of the present invention.

FIG. 2 is a side view showing a method for producing the double-sided adhesive tape of the present invention.

FIG. 3 is an enlarged cross-sectional view of part A in FIG.

FIG. 4 is an enlarged sectional view of a B part in FIG.

5 is an enlarged cross-sectional view of a C portion of FIG.

FIG. 6 is an enlarged sectional view of a D part of FIG.

FIG. 7 is a cross-sectional view showing a double-sided adhesive tape of the present invention.

[Explanation of symbols]

 1: Process paper 2: Cloth substrate 3: Crimping roll 4: Semi-finished product 5: Release paper 6: Product 11: Rubber adhesive layer 21: Synthetic resin film 51: Acrylic adhesive layer

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display area C09J 7/02 JLE

Claims (1)

[Claims] 1. A rubber-based pressure-sensitive adhesive layer formed on a process paper surface is attached to a synthetic resin film surface of a cloth base material having a synthetic resin film laminated on one side together with the process paper, and the cloth base material is placed outside. It is possible to wind up the semi-finished product and then, while unwinding the semi-finished product, separately stick the acrylic pressure-sensitive adhesive layer formed on the release paper surface to the other surface of the cloth base material, and remove the release paper. A method for producing a double-sided adhesive tape which is a feature.