申请人:Higuchi Naoaki
公开号:US20120034447A1
公开(公告)日:2012-02-09
Provided is a heat-expandable removable acrylic pressure-sensitive adhesive tape that has high normal-state adhesive power when bonded independently of whether the adherend has or does not have irregular surface and permits easy separation when the bonded region is separated and disassembled by lowering the adhesive power by heating, that permits easily separation-decomposition, even after long-term storage at high temperature.
The heat-expandable removable acrylic pressure-sensitive adhesive tape or sheet according to the present invention includes at least a heat expanding agent-containing pressure-sensitive adhesive layer, and the tape or sheet has an initial 90° peel adhesive strength to a polycarbonate plate as adherend of 10 N/25 mm or more and a 90° peel adhesive strength after storage in an atmosphere at 80° C. for 2 months as bonded to the polycarbonate adherend and after heat expansion treatment of less than 10 N/25 mm.
提供的是一种热膨胀可拆卸丙烯酸压敏胶粘带,无论粘接的基材表面是否不规则,都具有高粘接力,并且在通过加热降低粘接力进行分离时,可以轻松分离粘接区域,即使在高温长期储存后也可以轻松分离分解。本发明的热膨胀可拆卸丙烯酸压敏胶粘带或薄片至少包括含有热膨胀剂的压敏胶层,该带或薄片在初次粘接到聚碳酸酯基材时的90°剥离粘接强度为10 N/25 mm或更高,并且在80℃环境下储存2个月后进行热膨胀处理后,与聚碳酸酯基材粘接的90°剥离粘接强度小于10 N/25 mm。