Laminates useful as packaging materials and method for manufacture thereof
AssigneeEastman Kodak Company
InventorChen-i Lu
Life of this patent
Estimating the term…
Abstract
Heat-sealable laminates useful as packaging materials, for example, for the packaging of photographic processing chemicals, are comprised of a layer of metal foil, an outer heat-sealable layer of a radiation-cured and heat-fused polymeric composition, and a radiation-cured chemically-resistant polymeric interlayer between the foil and the outer layer. The laminates are manufactured by coating a metal foil with a radiation-curable composition that is capable of forming a chemically-resistant layer upon radiation curing, irradiating the coating to cure it, overcoating with a radiation-curable composition such as a vinyl plastisol that is capable of forming a heat-sealable layer upon radiation curing, irradiating the overcoat to cure it, and heating the laminate to fuse the overcoat layer.
Claims24
A laminate adapted for use as a packaging material, said laminate comprising (1) a metal foil (2) a heat-sealable layer of a radiation-cured and heat-fused polymeric composition and (3) a radiation-cured chemically-resistant polymeric interlayer between said foil and said heat-sealable layer.
An article of manufacture comprising a container and alkaline fluid means disposed in said container, said container being at least partially constructed from a laminate having at least first, second and third layers, said first layer being a heat-sealable layer of a radiation-cured and heat-fused polymeric composition in contact with said alkaline fluid means, said second layer being a barrier layer disposed between said first and third layers, and said third layer being a metal foil;
- said barrier layer being a radiation-cured chemically-resistant polymeric layer.
Dependencies are inferred from the claim text.