Film including solvent barrier and primer layer
Assignee3M Innovative Properties Company
InventorsTianyu Wu, Rajdeep S. Kalgutkar, Ning Zhou, David B. Bilbrey
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Abstract
Films including solvent barriers and primer layers are described. In particular, films including a substrate, the substrate including polylactic acid, a primer layer disposed on the substrate, a barrier layer disposed on the surface of the primer layer opposite the substrate, and an adhesive layer disposed on a surface of the barrier layer opposite the primer layer. The barrier layer includes an amorphous aliphatic polyamide with a glass transition temperature of at least 40 #C. Such films can provide acceptable adhesion and barrier performance to polylactic acid based graphics film systems.
Claims13
A film, comprising:
- a substrate, the substrate including polylactic acid;
- a primer layer disposed on the substrate;
- a barrier layer disposed on a surface of the primer layer opposite the substrate;
- and
- an adhesive layer disposed on a surface of the barrier layer opposite the primer layer;
- wherein the barrier layer includes a polyamide;
- wherein the polyamide is (i) an amorphous aliphatic polyamide,
- and includes (ii) secondary amine units resulting in tertiary amide linkages.
Dependencies are inferred from the claim text.