公开(公告)号：US20130323437A1

公开(公告)日：2013-12-05

申请号：US13962086

申请日：2013-08-08

Applicant: NITTO DENKO CORPORATION

Inventor： Tomohide Banba ,  Hiroaki Kishioka ,  Takahiro Nonaka ,  Masatomo Natsui ,  Hiroaki Fumoto ,  Shou Takarada ,  Takashi Suzuki

IPC: C09J133/14 ,  C09J133/08

CPC classification number: C09J133/14 ,  B32B2457/202 ,  B32B2457/208 ,  C09J7/10 ,  C09J7/385 ,  C09J133/066 ,  C09J133/08 ,  C09J2203/318 ,  C09J2433/00 ,  G06F3/044 ,  Y10T428/1059 ,  Y10T428/1077 ,  Y10T428/24479 ,  Y10T428/28 ,  Y10T428/2891

Abstract: Provided is a pressure-sensitive adhesive sheet for optical use which less suffers from a misoperation-causing change in capacitance upon application to an optical member.The pressure-sensitive adhesive sheet for optical use includes a pressure-sensitive adhesive layer and has a dielectric constant of from 2 to 8 at a frequency of 1 MHz and a dielectric loss tangent of more than 0 and 0.2 or less at a frequency of 1 MHz. The pressure-sensitive adhesive sheet for optical use preferably has a dielectric constant at a frequency of 1.0×106 Hz being 60% or more of that at a frequency of 1.0×104 Hz. In addition, the pressure-sensitive adhesive sheet for optical use preferably has an absolute value of difference between the dielectric loss tangent at a frequency of 1.0×106 Hz and that at a frequency of 1.0×104 Hz of 0.15 or less.

Abstract translation: 本发明提供一种光学用粘合片，其在光学构件的应用时容易产生误动作变化。 用于光学用途的压敏粘合片包括压敏粘合剂层，并且在1MHz的频率下的介电常数为2〜8，频率为1的介电损耗角正切大于0且为0.2以下 MHz。 用于光学用途的粘合片优选具有在1.0×106Hz的频率下的介电常数为1.0×104Hz频率的60％以上。 此外，用于光学用途的粘合片优选具有在1.0×106Hz的频率下的介电损耗角正切与1.0×104Hz的频率之间的绝对值为0.15或更小的绝对值。