JPH07126584A - Matted double-coated pressure-sensitive adhesive tape - Google Patents

Abstract

PURPOSE:To provide a matted double-coated pressure-sensitive adhesive tape which, when applied to an adherend, does not impair the beautifulness of a sheet material with an appearance of an artistic design, such as an punched decorative material (e.g. punched sheet) due to the gloss of the adhesive seen through the openings. CONSTITUTION:The adhesive tape is prepared by applying a heat-active adhesive mainly consisting of at least one rubber component selected from among a styrene block copolymer, a styrene/butadiene rubber, a natural rubber, a nitrile rubber, a chloroprene rubber, a butyl rubber and an acrylic rubber, a tackifying resin, an adhesive polyolefin resin and a colorant to one surface of a support and applying a pressure-sensitive adhesive layer on the other surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-sided adhesive tape for fixing a sheet-like material such as a perforated decorative material having a design appearance to an adherend.

[0002]

2. Description of the Related Art A sheet-like material whose surface can be used as an exterior, and which has openness is as follows:
Examples include woven cloth, non-woven cloth, knitted goods, net-shaped extruded products, punching sheets, and the like. As a means for fixing these to the adherend, a method of applying an adhesive, sticking a double-sided adhesive tape, etc. is used. ing.

[0003]

However, in such a bonding method, since the adhesive flows after the bonding is completed, the existence of the adhesive is recognized due to its surface gloss,
There is a problem of impairing the aesthetics of design.

Particularly, when a net-like article or a punching sheet having a relatively large hole diameter is adhered, the surface gloss of such an adhesive becomes an image of the product when the appearance of the design becomes important as in a television or an audio device. It is down, which is not desirable.

Further, in the method of applying the adhesive to the back side of the apertured material by spraying or the like, the adhesive wraps around to the opposite side through the apertured portion, resulting in a remarkable aesthetic damage.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a novel double-sided adhesive tape which does not spoil the appearance of the adhesive due to glossiness of the adhesive after completion of the adhesion. And

[0007]

The object of the present invention is as follows.
Styrene block copolymer, styrene butadiene rubber,
At least one rubber component (A) selected from the group consisting of natural rubber, nitrile rubber, chloroprene rubber, butyl rubber, and acrylic rubber, an adhesion-imparting resin (B), an adhesive polyolefin resin (C), and A heat-activatable adhesive containing the colorant (D) as a main component is provided on one surface of the support, and an adhesive layer on the other surface thereof.

The rubber component (A) of the heat activated adhesive used in the present invention is selected from the group consisting of styrene block copolymer, styrene butadiene rubber, natural rubber, nitrile rubber, chloroprene rubber, butyl rubber and acrylic rubber. The styrene block copolymer is particularly preferable because it can reduce the viscosity in either solution or heat melting and easily mix and disperse other components.

The adhesion-imparting resin is added to the rubber component, but it is necessary to consider the petroleum resin, the terpene resin, the rosin resin, coumarone, the phenol resin, and the like.

The amount added is generally in the range of 20 to 200 parts by weight per 100 parts by weight of rubber.

The matte surface which is the object of the present invention is obtained by adding additives for surface roughening such as urethane beads, glass beads, silicon oxide fine powder, talc, calcium oxide and shirasu balloons in paints and the like. Although the method of obtaining is generally used, such a material requires a considerable amount of addition and serves as a filler, so that the adhesiveness of the surface cannot be obtained at all.

[0012] When the amount of the additive added is reduced, matte effect cannot be obtained and the adhesiveness is insufficient.

However, when a polyolefin resin is added to a rubber component, it exhibits a dispersed state similar to that of the above-mentioned filler, provides a matte surface, and also acts as an adhesive in coexistence with the rubber component, so that the adhesiveness is improved. Not only that, but also has the effect of increasing the adhesiveness to the olefin-based adherend.

Examples of the polyolefin resin in the present invention include wax, low molecular weight polyethylene, atactic polypropylene, and amorphous poly α-olefin, and especially amorphous poly α-olefin has a great matting effect. The amount of the polyolefin resin added is 10 parts by weight to 2 parts by weight based on 100 parts by weight of the rubber component.
The amount is 00 parts by weight, more preferably 30 parts by weight to 100 parts by weight.

Polyolefin resins are generally difficult to be compatible with the rubber component, and tend to be phase-separated by long-term storage or cooling in a solution or a molten state.

In the compositions (A) to (D) of the present invention,
In particular, the dispersion and incompatibility of the rubber component and the polyolefin resin are characterized by having a matting effect, but since similar effects can be obtained even in the incompatible system due to the polar and nonpolar properties of the rubber components, two or more Mixing the components of 1 gives good results.

It is preferable that the colorants have similar colors according to the design and color tone of the apertured decorative material. Inorganic pigments, organic pigments, dyes and the like may be combined in any combination, but it is only necessary to remove the luster. For example, by adding carbon black,
It may be gray or black.

In addition, stabilizers, antiaging agents and the like can be added as needed.

Each of the components (A) to (D) can be dissolved or dispersed in a solvent or melted by heat to obtain a matte adhesive surface.

The support can be selected according to the purpose, such as a plastic film of polyester, polypropylene, polyethylene, polyvinyl chloride, polystyrene or the like, or a non-woven fabric using rayon or polyester.

As a coating method, a knife coater or a roll coater is generally used for a solution, and a roll coater or an extrusion method is generally used for a hot melt molten state.

In the case of a method of forming the heat-activatable adhesive into a film using some process paper or process film and transferring the film onto the support surface, it is necessary to use embossed process paper because the surface of the process paper or the like will be pulled as it is.

Since the heat-activatable adhesive has a matting effect on the component itself even if it is melted in the bonding process, gloss appears even when the adhesive surface is visually recognized from the open part of the open-hole decorative material. There is no.

A general pressure-sensitive adhesive layer can be provided on the other surface of the support.

The general pressure-sensitive adhesive layer is made of an acrylic type, a natural rubber type, a styrene block copolymer type, a butyl rubber type or the like. In the case of such a double-sided adhesive tape, the pressure-sensitive adhesive layer has an adhesive on the release paper. It is common to form a film by coating and transfer it to a support.

[0026]

The heat-activatable adhesive, which is a mixture of the rubber component (A), the adhesion-imparting component (B), the polyolefin resin (C) and the colorant (D), is applied on the support and the adhesive is applied on the other surface. A layer can be provided, and the opening cosmetic material can be heat-bonded by heat lamination or the like, and the opening cosmetic material can be easily attached to the adherend with an adhesive.

[0027]

EXAMPLES The present invention will be specifically described below with reference to examples and comparative examples, but the present invention is not limited to these examples. (Example 1) 40 parts by weight of styrene / butadiene / styrene block copolymer (trade name Califlex TRKX65, manufactured by Shell Chemical Co., Ltd.), and 50 parts by weight of terpene resin (trade name: Clearon P125, manufactured by Yasuhara Chemical Co.) as an adhesion-imparting resin. , Atactic polypropylene resin (trade name Sumitic SK-11A, manufactured by Sumitomo Chemical Co., Ltd.) 1
0 parts by weight, carbon black 3 parts by weight, antioxidant (trade name Irganox 1010, manufactured by Ciba Geigy) 1
150 parts by weight of toluene and 100 parts of n-hexane are used.
Into a mixed solvent of parts by weight, the mixture was stirred while heating at 40 to 50 ° C., dispersed and dissolved.

The adhesive thus obtained was applied onto a biaxially stretched polypropylene film having a thickness of 60 μm so as to have a dry thickness of 50 μm using a knife coater and dried to form a heat-activatable adhesive layer.

On the other hand, 0.8 parts by weight of a crosslinking agent (trade name: Coronate L, manufactured by Nippon Polyurethane Co.) was added to 100 parts by weight of an acrylic adhesive (trade name: SK Dyne 1717, manufactured by Soken Chemical Industry Co., Ltd.) and mixed well. It was applied on a silicone release paper and dried to form an adhesive film. The pressure-sensitive adhesive film was transferred to the other surface of the film coated with the heat-activatable adhesive by laminating to prepare a double-sided adhesive tape.

(Example 2) Hydrogenated product of styrene / ethylene / butylene / styrene block copolymer (trade name)
Clenton G1657, Shell Chemical Co., Ltd.) 20 parts by weight,
Petroleum resin (brand name Alcon P1
25, manufactured by Arakawa Chemical Co., Ltd.) 35 parts by weight, polybutene (trade name: Polybis 30SH, manufactured by Shell Chemical Co., Ltd.) 5 parts by weight, and as a polyolefin resin, polypropylene wax (trade name: Viscole 550P, manufactured by Sanyo Kasei Co., Ltd.) 10 parts by weight, As a coloring agent, 1 part by weight of carbon black is added to 18
The mixture was melt-mixed with a kneader while heating to 0 ° C. Using a roll coater, this was applied onto a polyester non-woven fabric having a thickness of 60 μm (trade name: Vilene H8004, manufactured by Nippon Vilene Co., Ltd.) so that the adhesive layer thickness would be 70 μm.

On the other surface of the support, a general hot melt adhesive (trade name Hibon 9611, manufactured by Hitachi Chemical Polymer Co., Ltd.) containing a styrene block copolymer as a main component is used as the heat-activatable adhesive layer. In the same manner as above, it was coated on a silicone release paper with a roll coater and transferred by lamination to give a double-sided adhesive tape.

Example 3 20 parts by weight of hydrogenated product of styrene / isoprene / styrene block copolymer (trade name: Septon 2063, manufactured by Kuraray Co., Ltd.), hydrogenated product of styrene / ethylene / butylene / styrene block copolymer To 20 parts by weight (above), 15 parts by weight of a petroleum resin (trade name, manufactured by Escoletz 4101 Exxon Chemical Co., Ltd.) and 20 parts by weight of a terpene phenol resin (trade name: YS Polystar T145, manufactured by Yasuhara Chemical Co., Ltd.) as an adhesion promoter are added. Amorphous poly-α as resin
-Adding 30 parts by weight of olefin (trade name: Ubetac UT2330, manufactured by Ube Lexen) and 0.4 part by weight of a brown dye (trade name: Oil Brown, manufactured by Orient Chemical Co., Ltd.) as a colorant, and adding to a solvent in the same manner as in Example 1. Melted to obtain a heat activated adhesive solution. This was applied to a biaxially oriented polypropylene film in the same manner as in Example 1 and dried, and a pressure-sensitive adhesive layer was similarly provided on the other surface to obtain a double-sided adhesive tape.

(Comparative Example 1) Hydrogenated product of styrene / ethylene / butylene / styrene block copolymer (supra) 5
0 parts by weight, 50 parts by weight of a petroleum resin (trade name Alcon P125, manufactured by Arakawa Chemical Co., Ltd.) as an adhesion-imparting resin, and 3 parts by weight of carbon black as a colorant, and melted in the same manner as in Example 1 to obtain a heat-activatable adhesive. A solution was obtained. Then, a double-sided adhesive tape was obtained in the same manner as in Example 1.

(Comparative Example 2) 40 parts by weight of styrene / isoprene / styrene block copolymer (described above), 30 parts by weight of a terpene phenol resin (trade name YS Polystar T145, manufactured by Yasuhara Chemical Co.) as an adhesion-imparting resin, petroleum resin ( Product name Alcon P125, Arakawa Chemical Co., Ltd.) 3
2 parts by weight of carbon black was added to 0 parts by weight, 10 parts by weight of fine silica powder was further added, and the mixture was dispersed and dissolved in 200 parts by weight of toluene. Then, a double-sided adhesive tape was obtained in the same manner as in Example 1.

(Adhesive Strength) 0.3 m as a material having openness to the heat-activatable adhesive surface of the tapes obtained in Examples and Comparative Examples.
A m-thick polypropylene film having a hole diameter of 0.9φ was punched and heat laminated at 100 ° C. The tape and punching sheet were T-peeled at 23 ° C., and the adhesive strength was measured.

(Matteness) The glossiness of the heat-activatable adhesive surface of each tape was measured by a gloss meter 4020 (BYKchem).
(manufactured by IE). (Standard: According to DIN 67530) The smaller this value is, the less gloss is, and when it exceeds 10, it can be said to be a black glossy surface.

[Table 1]

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Claims (1)

[Claims] Styrene block copolymer, styrene butadiene rubber,
At least one rubber component (A) selected from the group consisting of natural rubber, nitrile rubber, chloroprene rubber, butyl rubber, and acrylic rubber, an adhesion-imparting resin (B), an adhesive polyolefin resin (C), and A matte double-sided adhesive tape comprising a heat-activatable adhesive containing a colorant (D) as a main component, and a pressure-sensitive adhesive layer provided on one surface of the support and the other surface of the support.