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Double-sided pressure-sensitive adhesive tape

A pressure-sensitive adhesive tape, pressure-sensitive adhesive technology, applied in the direction of adhesives, pressure-sensitive films/sheets, adhesive types, etc., can solve problems such as hindering visual inspection of parts

Active Publication Date: 2011-01-26
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In that case, since the part must be visually inspected through the release liner, there is the problem that scratches and stains on the release liner, among other things, can prevent visual inspection of the part

Method used

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  • Double-sided pressure-sensitive adhesive tape
  • Double-sided pressure-sensitive adhesive tape
  • Double-sided pressure-sensitive adhesive tape

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0158] In the production process of the double-sided pressure-sensitive adhesive tape of the present invention, when drying the coating layer formed by coating the pressure-sensitive adhesive composition (solution), it is initially dried at a relatively low temperature and then dried at a high temperature, Such a drying method is ideal. In the preparation of general double-sided pressure-sensitive adhesive tapes, from the perspective of improving production efficiency, drying is usually carried out at a higher temperature for a shorter period of time, so that no foaming occurs in the coating layer. However, since the evaporation rate of the solvent is high and convection strongly occurs in the coating layer in this drying method, the thickness unevenness of the entire surface of the pressure-sensitive adhesive layer tends to become large. Therefore, in order to reduce the thickness unevenness of the entire surface by suppressing the variation in the thickness of the pressure-s...

Embodiment

[0166] The present invention will be described in further detail below based on examples, but the present invention is not limited to these examples.

preparation example

[0168] (release liner 1)

[0169] A PET film (manufactured by Toray Industries, Ltd., trade name "Lumirror T-60", thickness 50 μm, haze value 1.0%) was used as a release liner base material. As the release treatment agent, a silicone-based polymer release treatment agent (manufactured by Shin-Etsu Chemical Co., Ltd., trade name "KS-774") was used, and 100 parts by weight of the release treatment agent and 1.0 parts by weight of the platinum catalyst were dissolved in heptane A release treatment agent coating solution having a solid content of 1.0% by weight was prepared. On one side of the above-mentioned release liner base material, the above-mentioned coating solution was developed and coated, and dried at 130° C. for 1 minute, thereby preparing a layer having a release layer on one surface (coating amount of the release treatment agent: 0.10 g / m 2 ) release liner 1. The haze value of the release liner 1 was 1.0%.

[0170] (release liner 2)

[0171] A release liner was pre...

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Abstract

The present invention provides a pressure-sensitive adhesive tape including a release liner A having a haze value of 5.0% or less. Since the double-sided pressure-sensitive adhesive tape of the invention has the aforementioned construction, it does not inhibit visual inspection of an adherend even in case that the visual inspection of adherend is carried out under a condition of still having the aforementioned release liner. Accordingly, it can be suitably used in the application for adhering optical members, and the like.

Description

technical field [0001] The present invention relates to a double-sided pressure-sensitive adhesive tape for optical parts and the like. Background technique [0002] In recent years, display devices such as liquid crystal displays (LCDs) and input devices such as touch panels used in the aforementioned display devices have been used in various fields. In the production of these display devices and input devices, etc., transparent pressure-sensitive adhesive tapes are used for adhering optical components. For example, transparent double-sided pressure-sensitive adhesive tapes are used to adhere touch screens to various display devices and optical parts (protective plates, etc.) (for example, see JP-A-2003-238915, JP-A-2003-342542 and JP-A-2004-231723). [0003] When two parts are attached to each other by the above-mentioned double-sided pressure-sensitive adhesive tape, one of the two release liners (release sheets) provided on the two adhesive surfaces of the double-sided...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J133/00B32B27/00B32B27/30C09J7/10G02F1/1335
CPCC09J133/04C08F220/18C09J7/00C08F2220/281G02F2202/28G02B5/305C08F220/06C08F2220/1825C09J7/0225C09J2203/318C08F2220/1858C09J2433/00C09J2201/622C09J7/40C09J7/10Y10T428/1476C08F220/281C08F220/1808C08F220/1804C09J2301/312C09J7/385C09J7/22C09J7/38C09J9/00C09J2301/124G02B1/14
Inventor 岸冈宏昭麓弘明
Owner NITTO DENKO CORP