Process for manufacturing multilayer sheet material
AssigneeE. I. Du Pont de Nemours and Company
InventorKeith C. Andersen
Life of this patent
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Abstract
A multilayer sheet material that is capable of being adhered to a foamed polymer core material is prepared from at least four layers, which are a first outer layer of a printable sheet material, an inner layer of a fibrous sheet material, an inner layer of an adhesive material, and a second outer layer of a weldable sheet material. Stiff foam polymer core articles, such as body boards, having detailed designs on them can be prepared by welding the multilayer sheet material to a foamed polymer core material.
Claims5
A process for manufacturing the multilayer sheet material composed of at least four layers, which are (1) a first outer layer of a printable sheet material, (2) an inner layer of a fibrous sheet material, (3) an inner layer of an adhesive material, and (4) a second outer layer of a weldable sheet material comprising the steps of extruding the printable sheet material layer onto the fibrous sheet material layer to form an extruded printable sheet material/fibrous sheet material layer, co-extruding the adhesive material layer and the weldable sheet material layer to form a two-layer configuration, and then melt-coating the two-layer configuration onto the extruded printable sheet material/fibrous sheet material layer in a way that the weldable sheet material layer forms an outer layer.
A process for manufacturing the multilayer sheet material comprised of at least four layers, which are (1) a first outer layer of a printable sheet material, (2) an inner layer of a fibrous sheet material, (3) an inner layer of an adhesive material, and (4) a second outer layer of a weldable sheet material comprising the steps of coating both sides of the fibrous sheet material by extruding the printable sheet material layer onto one side of the fibrous sheet material layer and simultaneously co-extruding the adhesive material layer and the weldable sheet material layer onto the other side of the fibrous sheet material layer such that the weldable sheet material layer forms an outer layer.
Dependencies are inferred from the claim text.