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    • 1. 发明专利
    • Substrate-less double-sided pressure-sensitive adhesive sheet
    • 基底 - 双面压敏粘合片
    • JP2013091785A
    • 2013-05-16
    • JP2012221756
    • 2012-10-04
    • Mitsubishi Plastics Inc三菱樹脂株式会社
    • SAITO TOMOHISA
    • C09J7/02B32B27/00
    • C09J7/0232C09J7/401C09J7/403C09J7/405C09J133/08C09J201/00C09J2201/128C09J2201/622C09J2429/005C09J2433/00C09J2467/005C09J2467/006C09J2483/005Y10T428/1438
    • PROBLEM TO BE SOLVED: To provided a substrate-less, double-sided, pressure-sensitive adhesive sheet which minimizes the flaw resulting from foreign matter generated in a manufacturing step and thus exhibits excellent optical inspectability and which achieves a high yield in a step of laminating the pressure-sensitive adhesive sheet on other member and thus ensures high productivity.SOLUTION: The substrate-less, double-sided, pressure-sensitive adhesive sheet 10 obtained by laminating a first release film 31 on one surface of a pressure-sensitive adhesive layer 11 and laminating a second release film 32 on the other surface thereof, wherein the first release film is a biaxially oriented polyester film having a release layer which comprises both a silicone resin that has alkenyl and alkyl groups as functional groups and that contains a migratory component and a platinum-based catalyst and which exhibits a residual adhesion ratio of 60 to 90%, a low-speed peel force of 10 to 20 mN/cm at a peel rate of 300 mm/min, a high-speed peel force of up to 2.5 times the low-speed peel force at a peel rate of 10,000 mm/min, and a Martens hardness of 400 N/mmor higher as determined with a 115° triangular pyramid indenter and a test force of 0.10 mN.
    • 要解决的问题:提供一种无基材双面压敏粘合片,其使由制造步骤中产生的异物导致的缺陷最小化,因此显示出优异的光学检查性,并且其获得高产率 将粘合片层叠在其他构件上的步骤,从而确保高生产率。 解决方案:通过在压敏粘合剂层11的一个表面上层压第一剥离膜31并在另一个表面上层压第二剥离膜32而获得的无基材双面压敏粘合片10 其中,所述第一剥离膜是具有脱模层的双轴取向聚酯膜,所述剥离层包含具有烯基和烷基作为官能团的硅氧烷树脂,并且含有迁移成分和铂系催化剂,并且具有残留粘附性 比例为60〜90%,剥离速度为300mm / min时的低速剥离力为10〜20mN / cm,高剥离力为剥离时的低速剥离力的2.5倍 速度为10,000mm / min,Martens硬度为115N / mm 2,SPT =“POST”> 2 或更高,使用115°三角锥压头和0.10mN的试验力测定。 版权所有(C)2013,JPO&INPIT