TRANSPARENT PRESSURE-SENSITIVE ADHESIVE PRODUCT FOR OPTICAL USE, TRANSPARENT PRESSURE-SENSITIVE ADHESIVE LAMINATES FOR OPTICAL USE AND PROCESS FOR PRODUCTION OF THE SAME

摘要

The invention provides a transparent pressure-sensitive adhesive product for optical use and a transparent pressure-sensitive adhesive laminate for optical use which stably exert peeling site selectivity between the interfaces between both sides of a transparent pressure-sensitive adhesive product and release sheets in applying the product or the laminate and which stably and easily exert peeling site selectively between both sides of the product in reworking the product or the laminate by re-application; and a process for the production of the same. A transparent pressure-sensitive adhesive product for optical use which has adhesive faces (a) and (b) different in tackiness and which is made from an addition-reaction type silicone gel, characterized in that the tackiness (Ga) of the adhesive face (a) and the tackiness (Gb) of the adhesive face (b) satisfy the relationship: Ga < Gb and correspond to ball numbers of 3 to 15 as determined by the inclined-type ball tack test method according to JIS Z0237 (at an angle of inclination of 30°) with the ball number difference of 2 to 12.