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US 8,771,833 B2Granted
Laminated polyester film
AssigneeMitsubishi Plastics, Inc.
InventorsTaishi Kawasaki, Masato Fujita
Life of this patent
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Abstract
The present invention provides a laminated polyester film which can be suitably used in the applications requiring good adhesion to a micro-lens layer, a prism layer or the like, for example, in a backlight unit for liquid crystal displays, etc. The laminated polyester film of the present invention comprises a polyester film, and a coating layer formed on at least one surface of the polyester film by applying a coating solution comprising a urethane resin, an epoxy compound, an oxazoline compound and a melamine compound thereonto.
Claims20
A laminated polyester film comprising
- a polyester film,
- a coating layer formed on at least one surface of the polyester film by applying a coating solution consisting of a urethane resin, an epoxy compound, an oxazoline compound and a melamine compound thereonto, and
- a prism layer or a micro-lens layer formed directly on the coating layer,
- wherein a content of the urethane resin in the coating layer is 20 to 90% by weight, a total content of the epoxy compound, the oxazoline compound and the melamine compound in the coating layer is 10 to 80% by weight, and the urethane resin is a self-emulsifiable urethane resin which is ionomerized by introducing a carboxyl group into a skeleton of the urethane resin and is obtained by using a polycarbonate polyol or a polyester polyol as a polyol.
1 more element
A laminated polyester film comprising
- (1) a polyester film,
- (2) a coating layer formed on at least one surface of the polyester film by applying to the polyester film a coating solution consisting of a urethane resin, an epoxy compound, an oxazoline compound, a melamine compound, and
- (3) a prism layer or a micro-lens layer formed directly on the coating layer,
- particles, at least one additive selected from the group consisting of a defoaming agent, a coatability improver, a thickening agent, an organic lubricant, an antistatic agent, an ultraviolet absorber, an antioxidant, a foaming agent and a dye, and at least one binder polymer selected from the group consisting of an acrylic resin, polyvinyl resin, polyalkylene glycol, polyalkylene imines, methyl cellulose, hydroxy cellulose and starch, or mixture thereof, and
- wherein a content of the urethane resin in the coating layer is 20 to 90% by weight, a total content of the epoxy compound, the oxazoline compound and the melamine compound in the coating layer is 10 to 80% by weight, and the urethane resin is a self-emulsifiable urethane resin which is ionomerized by introducing a carboxyl group into a skeleton of the urethane resin and is obtained by using a polycarbonate polyol or a polyester polyol as a polyol.
2 more elements
Dependencies are inferred from the claim text.