ADHESIVE SHEET AND METHOD OF PRODUCING ADHEREND LAMINATE

• Main Authors: SAKAI MIWAKO, FUJISAKI JUNICHI
• Format: Patent
• Language: English; Japanese
• Published: 07.09.2015
• 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 an adhesive sheet which has good reworkability and excellent adhesion after rework and a method of producing an adherend laminate using the adhesive sheet.SOLUTION: In an adhesive sheet 1, an adhesive layer 3 is arranged between a first separator 5 and a second separator 7, and the adhesive layer 3 changes in adhesion of the contact surface in contact with an adherend before and after heating. The adhesive layer 3 is composed of an adhesive composition comprising at least an adhesive and a fine powder, and its peel force meets specified relation A: a<a1≤b<a2≤b1. 【課題】 リワーク性が良好で、リワーク後の接着性も優れた粘着シートと、この粘着シートを用いた被着体積層物の製造方法を提供する。【解決手段】 第１セパレータ５と第２セパレータ７の間に粘着層３を配置した粘着シート１である。粘着層３は被着体との接触面の粘着力が加熱の前後で変化する。粘着層３は、少なくとも粘着剤と微粒子を含有する粘着剤組成物により形成されており、かつその剥離力が所定の関係（関係Ａ：ａ＜ａ１ ｂ＜ａ２ ｂ１）を満足している。【選択図】 図１