TRANSPARENT ADHESIVE FILM

• Main Author: NOMURA SHIGERU
• Format: Patent
• Language: English; Japanese
• Published: 21.04.2016
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CALCULATING; CHEMISTRY; COMPUTING; COUNTING; DYES; ELECTRIC DIGITAL DATA PROCESSING; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; PAINTS; PHYSICS; POLISHES; USE OF MATERIALS AS ADHESIVES

PROBLEM TO BE SOLVED: To provide a transparent adhesive film which is used for bonding a display device of a touch panel and a position input device thereof together or for bonding a surface protective cover and the touch panel together, and which is excellent in adhesion reliability and reworkability.SOLUTION: A transparent adhesive film is used for bonding a display device of a touch panel and a position input device thereof together or for bonding a surface protective cover and the touch panel together, and contains an adhesive component and a gas generating agent to generate gas by irradiation of ultraviolet light of 320 nm or lower. In the transparent adhesive film, the gas generating agent has a weight absorption coefficient of 10abs or less at a wavelength of 365 nm, a weight absorption coefficient of 10abs or more at a wavelength of 320 nm, and a 5% heating loss temperature of 250°C or more when temperature is raised to 400°C at a rate of 5°C/min in air.SELECTED DRAWING: None 【課題】タッチパネルの表示装置と位置入力装置との貼り合せ又は表面保護カバーとタッチパネルとの貼り合せに用いられる、接着信頼性とリワーク性とに優れる透明接着フィルムを提供する。【解決手段】タッチパネルの表示装置と位置入力装置との貼り合せ又は表面保護カバーとタッチパネルとの貼り合せに用いられる透明接着フィルムであって、接着剤成分と、３２０ｎｍ以下の紫外線を照射することにより気体を発生する気体発生剤とを含有し、前記気体発生剤は、波長３６５ｎｍでの重量吸光係数が１０−３ａｂｓ以下、波長３２０ｎｍでの重量吸光係数が１０−３ａｂｓ以上であり、かつ、空気中で５℃／分の条件で４００℃まで昇温したときの５％加熱減量温度が２５０℃以上である透明接着フィルム。【選択図】なし