RELEASE FILM AND PROCESS FOR PRODUCING THE SAME

摘要

A release film is provided for supporting an ultrathin ceramic green sheet having a thickness of 0.5 to 1.0 μm, and the release film due to containing modified organic particles and an antistatic agent has a slippery releasing surface with a low friction coefficient and hence excellent coatability and releasing properties; resulted in that when the release film is rolled up, the rolled surfaces do not adhere to each other, and when the ultrathin ceramic green sheet is peeled off from the release film, the ultrathin ceramic green sheet due to a relatively small electrostatic force being generated is without breaking; so that the release film contributes to increasing the yield of ultrathin ceramic green sheet.

主权项

1. A release film constituted by a thin film substrate and a releasing-agent coating having a thickness of 0.04 to 0.8 μm and coated on one side or both sides of the thin film substrate, wherein the releasing-agent coating is formed from a coating liquid composition consisting of the following ingredients a)-e), whose respective percentages by weight are based on the total weight of the releasing-agent coating and add up to 100 wt %:
a) a silicone resin, at 0.5-7.0 wt %; b) a platinum catalyst, at 0.06-0.3 wt %; c) a mixed solvent containing methyl ethyl ketone (MEK), toluene and xylene, at 90.9-99.4 wt %; wherein the mixing ratio between MEK, toluene, and xylene is 50 (MEK):40 (toluene):10 (xylene); d) modified organic particles, at 0.02-0.8 wt %; which are obtained from polystyrene (PS) particles or/and polymethylmethacrylate (PMMA) particles having been modified by grafting a bicycle[2,2,1]heptane-containing propylene; and e) an antistatic agent, at 0.02-1.0 wt %; which is one selected from an electrically conductive carbon material, an ionic-liquid antistatic agent or an electrically conductive polymeric antistatic agent.