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US 2023/0133260 A1Published application
Composite polymeric film
AssigneeDuPont Teijin Films U.S. Limited Partnership
InventorsShengsheng Liu, Erik Jevon Nelson
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Abstract
A composite film comprising a of amide substrate layer having a first and second surface, and a primer coating layer disposed on the first surface of the substrate layer, wherein the primer coating layer is derived from a composition comprising an acid copolymer resin, an organic crosslinker and an acid catalyst. A heat-sealable coating is applied on the primer.
Claims25
A composite film comprising a polyamide substrate layer having a first and second surface;
- a primer coating layer disposed on the first surface of the substrate layer, wherein the primer coating layer is derived from a composition comprising an acid copolymer resin, an organic crosslinker and an acid catalyst;
- and a heat-sealable polymeric coating layer disposed on the primer coating layer.
(canceled)
A method for manufacturing a composite film comprising:
- (i) disposing a primer coating layer composition comprising an acid copolymer resin, an organic crosslinker and an acid catalyst in a coating vehicle onto a surface of a polyamide substrate;
- (ii) drying the primer coating layer composition;
- (iii) heating the dried primer coating layer composition to form a cured primer layer;
- and
- (iv) disposing a heat-sealable polymeric coating layer comprising a heat-sealable polymeric material in a second coating vehicle onto the cured primer layer;
- and
- (v) drying and/or heating the heat-sealable polymeric coating layer.
4 more elements
Dependencies are inferred from the claim text.