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US 7,153,629 B2Granted
Releasing sheet
AssigneeLintec Corporation
InventorsYasushi Sasaki, Daisuke Tomita
Life of this patent
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AssigneeLintec Corporation
InventorsYasushi Sasaki, Daisuke Tomita
Estimating the term…
There are disclosed a releasing sheet comprising a substrate and a releasing agent layer which is installed by coating the substrate with a releasing agent liquid containing 1,4-polybutadiene and an antioxidant, and irradiating the coated layer with ultraviolet ray so that the layer is cured; and also a releasing sheet comprising in turn a substrate, an undercoat layer which is formed thereon and is composed of an elastic body, and a releasing agent layer which is installed on the undercoat layer by coating the same with a releasing agent liquid containing 1,4-polybutadiene and an antioxidant, and irradiating the layers with ultraviolet ray so that the layers are cured. Being of non-silicone base, the releasing sheets are excellent in releasability from a tacky adhesive agent layer and adhesiveness to the substrate.
A releasing sheet comprising a substrate, an optional undercoat layer, and a releasing agent layer prepared by coating the substrate, or if present prepared by coating the undercoat layer, with a releasing agent liquid composition comprising polymer and at least one antioxidant, and irradiating the coated layer with ultraviolet ray such that the layer is cured, wherein the polymer consists of 1,4-polybutadiene.
Dependencies are inferred from the claim text.