Pressure-sensitive adhesive sheet

一种粘着片、粘着剂层的技术，应用在胶粘剂、薄膜/薄片状的粘合剂、运输和包装等方向，能够解决耐候性低、变白、外观变差等问题，达到耐候性优良的效果

Inactive Publication Date: 2012-11-14
LINTEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In addition, when the above-mentioned adhesive sheet is used outdoors, or on windows irradiated by sunlight, or on the exterior of automobiles and motorcycles, etc., in the case of an adhesive sheet with low weather resistance, it may break and become white in a short period of time. The problem of poor appearance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] Using a two-screw extrusion kneader (manufactured by TECHNOVEL, KZW25TWIN-30MG-STM), 88% by mass of an ethylene-methacrylic acid copolymer (manufactured by Mitsui DuPont Polychemical Co., Ltd., NUCRELN0903HC) as a polyolefin resin was prepared as A mixture of 10% by mass of styrene-butadiene-styrene resin (manufactured by JSR Corporation, TR2250) and 2.0% by mass of carbon black (manufactured by Asahi Carbon Black Co., Ltd., SUNBLACK200) as a pigment, Make mixes. Next, a film having a film thickness of 100 μm was produced from the kneaded sheet using an extrusion tester (Toyo Seiki Seisakusho Co., Ltd., Labo Plastomill 30C150). The obtained film was used as a base material of an adhesive sheet. Here, the formulation composition of the constituent materials of the substrate is shown in Table 1 (the same applies hereinafter).

[0093] Both sides of high-quality paper are laminated with polyethylene resin, and one side is peeled with a silicone-based release agent. A co...

Embodiment 2

[0096] Using a two-screw extrusion kneader (manufactured by TECHNOVEL, KZW25TWIN-30MG-STM), 60% by mass of ethylene-methacrylic acid copolymer (manufactured by Mitsui DuPont Polychemical Co., Ltd., NUCRELN0903HC) and benzene as an olefin resin were mixed. A mixture of 10% by mass of styrene-butadiene-styrene resin (manufactured by JSR Corporation, TR2250) of vinyl resin and 30.0% by mass of carbon black (manufactured by Asahi Tan Corporation, SUNBLACK200) as a pigment was prepared. Practice film. The pressure-sensitive adhesive sheet was produced in the same manner as in Example 1 except that this kneaded sheet was used.

Embodiment 3

[0098] Using a two-screw extrusion kneader (manufactured by TECHNOVEL, KZW25TWIN-30MG-STM), 50% by mass of ethylene-methacrylic acid copolymer (manufactured by Mitsui DuPont Polychemical Co., Ltd., NUCRELN0903HC) and benzene as an olefin resin were mixed. A mixture of 48% by mass of styrene-butadiene-styrene resin (manufactured by JSR Corporation, TR2250) and 2.0% by mass of carbon black (manufactured by Asahi Tan Corporation, SUNBLACK200) as a pigment was prepared as a blend. Practice film. Except having used this kneading sheet, it carried out similarly to Example 1, and produced the adhesive sheet.

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Abstract

A pressure-sensitive adhesive sheet (1) which is provided with a substrate (11) and a pressure-sensitive adhesive layer (12) and in which multiple through holes (2) that extend from one surface of the sheet (1) to the other surface thereof are formed, wherein the substrate (11) is made of a resin composition that comprises 50 to 88% by mass of (A) a polyolefin resin, 10 to 48% by mass of (B) a styrene resin and / or an acrylic resin, with the polyolefin resin (A) excluded, and 2.0 to 30% by mass of (C) a pigment. By means of the through holes, the pressure-sensitive adhesive sheet (1) can prevent the occurrence of air bubbles or blisters, or enables the removal of air bubbles or blisters. In the sheet (1), additionally, the inner diameters of the through holes can be inhibited from enlarging. Therefore, the sheet (1) exhibits excellent surface appearance.

Description

technical field [0001] The present invention relates to an adhesive sheet capable of preventing or removing, for example, air trapping and blistering. Background technique [0002] When the adhesive sheet is attached to the adherend by hand, air is trapped between the adherend and the adhesive surface, and the appearance is impaired. Such air stagnation tends to occur particularly when the area of ​​the adhesive sheet is large. [0003] In addition, resin materials such as acrylic resin, ABS resin, polystyrene resin, polycarbonate resin, etc. will generate gas due to heating, etc., and stick the adhesive sheet on the adherend composed of such resin materials. In this case, foaming (swelling) occurs between the adherend and the adhesive sheet due to gas generated from the adherend. [0004] In order to solve the above problems, it was proposed to use 30-50,000 / 100cm 2 The adhesive sheet that forms through-holes with a hole density of 0.1-300 μm in diameter (Patent Document...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J201/00C09J7/24
CPCC09J2201/20C09J2423/006C09J2433/006C09J2205/31C09J7/0267C09J2425/006C09J7/24Y10T428/24331Y10T428/14Y10T428/24322Y10T428/28C09J2301/18C09J2301/416
Inventor 森冈孝至田矢直纪
Owner LINTEC CORP
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