COOLING-AND-PEELING TYPE PRESSURE SENSITIVE ADHESIVE COMPOSITION AND COOLING-AND-PEELING TYPE PRESSURE SENSITIVE ADHESIVE SHEET USING THE SAME

• Main Authors: KANOTA NAGISA, FUKUHARA KUNIAKI
• Format: Patent
• Language: English
• Published: 10.10.2013
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; DYES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; PAINTS; POLISHES; USE OF MATERIALS AS ADHESIVES

PROBLEM TO BE SOLVED: To provide a cooling-and-peeling type pressure sensitive adhesive composition which is reused after release of an adherend by once reducing a pressure sensitive adhesive force, in addition, is surely stuck fast to an adherend during processing of the adherend even at a processing temperature of 180°C, and exhibits such a proper adhesion as to readily release the adherend when the holding is not required while retaining a holding power of a certain degree in before and after the processing, and to provide a cooling-and-peeling type pressure sensitive adhesive sheet.SOLUTION: A cooling-and-peeling type pressure sensitive adhesive composition includes an adhesive polymer as an active ingredient, has a pressure sensitive adhesive force (initial pressure sensitive adhesive force) at 23°C after lamination at 100°C of ≥0.01 N/25 mm, a pressure sensitive adhesive force (pressure sensitive adhesive force at high temperature) at 180°C of ≥0.03 N/25 mm, and a pressure sensitive adhesive force (pressure sensitive adhesive force after heating) at 23°C after heating at 180°C for one hour and cooling from a heated state to 23°C of ≤3 N/25 mm. The cooling-and-peeling type pressure sensitive adhesive sheet uses the composition.