SURFACE PROTECTION SHEET

• Main Authors: NAKANISHI TADATOSHI, SHITARA KOJI, JO SOYA, DAIGAKU NORIJI
• Format: Patent
• Language: English
• Published: 17.03.2014
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; DYES; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; PAINTS; PERFORMING OPERATIONS; POLISHES; TRANSPORTING; USE OF MATERIALS AS ADHESIVES

PROBLEM TO BE SOLVED: To provide a surface protection sheet that enables easy peeling-off of only an outer sheet, and that suppresses occurrence of "lifting" or "removal" between inner sheets when peeling off an outer sheet in order to expose an inner sheet.SOLUTION: A surface protection sheet is obtained by laminating n layers of first to nth (n denotes 2 or a larger integer) pressure sensitive adhesive sheets having a substrate layer and an adhesive layer in this order. Each of adhesive layers from the first to (n-1)th pressure sensitive adhesive sheets makes contact with second to nth pressure sensitive adhesive sheets. A deflection of each of the first to (n-1)th pressure sensitive adhesive sheets is larger than a deflection of each of the second to nth adhesive sheets neighboring and contacting a deflection of an adhesive layer side of each of the pressure sensitive adhesive sheets.