Silicone coated film with back side slip control coating and method of controlling slip of such film
AssigneeMitsubishi Polyester Film GmbH
InventorsJohn M. Heberger, Kenneth J. Muschelewicz
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Abstract
The present invention relates to a self-supporting polymer film with a silicone-containing coating layer on the front surface that is capable of releasing free silicone oil and a slip control coating on the back surface, where the slip control coating has an exposed surface adapted to contact the free silicone oil. The slip control coating includes water soluble copolyester; and optionally includes a coupler, preferably a silane. A method for controlling the slip of silicone coated film by coating the back side of the film with this slip control coating is also disclosed.
Claims36
A coated polymer film comprising:
- a self-supporting polymer film layer having a front surface and a back surface;
- a silicone-containing coating on said front surface that is capable of releasing free silicone oil;
- a slip control coating on said back surface, wherein said slip control coating has an exposed surface adapted to contact said free silicone oil,
- said slip control coating including:
- a binder including a water soluble copolyester including about 50 to about 98 mol percent isophthalic acid, about 2 to about 20 mol percent of at least one sulfomonomer containing a sulfonate group attached to a dicarboxylic nucleus, and about 100 mol percent of a propane diol.
Dependencies are inferred from the claim text.