Polymeric film
AssigneeImperial Chemical Industries PLC
InventorsNaomi Katsura, Hikaru Takeuchi, Yuka Watanabe
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Abstract
A polymeric film has a substrate layer having a primer layer of a polyurethane resin containing at least one ethylenically unsaturated group. The primer layer provides good adhesion to a subsequently applied release layer. The substrate is preferably a polyester film. Suitable release layers contain cured silicone resins.
Claims17
A polymeric film comprising a substrate having on at least one surface thereof, a primer layer comprising a polyurethane resin which is the reaction product of, inter alia, an organic polyisocyanate, a polymeric polyl and an ethylenically unsaturated monomer.
A method of producing a polymeric film which comprises forming a film substrate, applying a primer layer composition to at least one surface of the substrate, the primer layer composition comprising a polyurethane resin which is the reaction product of, inter alia, an organic polyisocyanate, a polymeric polyol and an ethylenically unsaturated monomer, and applying heat to form a primer layer.
A polymeric film comprising a substrate having on at least one surface thereof, a primer layer comprising a polyurethane resin which is the reaction product of, inter alia, an organic polyisocyanate, a polymeric polyol and an ethylencially unsaturated monomer, and a release layer on the surface of the primer layer remote from the substrate.
Dependencies are inferred from the claim text.