| 摘要 |
<p>Provided is an inexpensive mold release film, whereby it becomes possible to minimize the peel rate dependency when a base-less double-sided adhesive sheet is used for optical purposes, for example in a touch panel, a liquid crystal polarizing plate and a retardation plate, to improve the productivity, cost performance or the like of the mold release film, and to impart a property of preventing the formation of any oligomer or a property of testing on the formation of any oligomer to the mold release film to thereby reduce the occurrence of contamination during a process or the formation of foreign substances in an adhesive agent. A mold release film comprising a polyester film having a mold release layer, wherein the mold release layer is bonded to an adhesive layer in a base-less double-sided adhesive sheet upon use, the mold release layer is a silicone-type mold release layer comprising (a) a silicone resin having an alkenyl group as a functional group, (b) a silicone resin having an alkyl group as a functional group, (c) a component capable of migrating into the adhesive layer, and (d) a platinum-containing catalyst, the content of the component (c) capable of migrating is 5-20 wt%, the low-speed peel force of the mold release layer at a speed of 300 mm/min falls within the range of 10-20 mN/cm, and the high-speed peel force of the mold release layer at a speed of 10000 mm/min is up to 2.5 times greater than the low-speed peel force.</p> |
