PRESSURE SENSITIVE ADHESIVE SHEET FOR ELECTRONIC APPARATUS

• Main Authors: MINOURA KAZUKI, WATANABE SHIGEKI, NIWA MICHIHITO, NISHIWAKI MASATAKA
• Format: Patent
• Language: English; Japanese
• Published: 02.04.2020
• 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

To provide a pressure sensitive adhesive sheet for an electronic apparatus with reduced dependence on a fossil resource-based material, while being appropriate to utilize in an electronic apparatus.SOLUTION: A pressure sensitive adhesive sheet for an electronic apparatus is provided. The pressure sensitive adhesive sheet includes an adhesive layer composed of a natural rubber-based adhesive agent. A base polymer of the adhesive agent includes methyl methacrylate modified natural rubber. In total carbon included in the adhesive layer, 50% or more is carbon derived from biomass. The pressure sensitive adhesive sheet exhibits a displacement length of 1.0 mm/60 minutes or less, in a heat-resistant holding power test conducted at 80°C.SELECTED DRAWING: Figure 1 【課題】化石資源系材料への依存が抑制され、かつ電子機器用途にも適した電子機器用粘着シートを提供すること。【解決手段】電子機器用の粘着シートが提供される。この粘着シートは、天然ゴムベースの粘着剤から構成された粘着剤層を備える。上記粘着剤のベースポリマーはメタクリル酸メチル変性天然ゴムを含み、かつ上記粘着剤層に含まれる全炭素の５０％以上はバイオマス由来の炭素である。上記粘着シートは、８０℃で行われる耐熱保持力試験においてズレ長さが１．０ｍｍ／６０分以下である。【選択図】図１