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US 6,645,336 B1Granted
Extrusion coating process
AssigneeE. I. Du Pont de Nemours and Company
InventorsYannick Albertone, George J. Ostapchenko
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AssigneeE. I. Du Pont de Nemours and Company
InventorsYannick Albertone, George J. Ostapchenko
Estimating the term…
A process for the preparation of a laminate, particularly a waterproof moisture vapor permeable laminate, comprising a substrate having on a surface thereof a thermoplastic polymer resin coating and further comprising a peelable release layer in contact with the surface of said thermoplastic polymer resin remote from the substrate, and optionally further comprising a tie layer between the substrate and the thermoplastic polymer resin, said process comprising the steps of forming or providing a substrate layer and providing on a surface thereof a thermoplastic polymer resin coating and a peelable release layer and optionally providing a tie layer between the substrate and the thermoplastic polymer resin coating, characterized in that the thermoplastic polymer resin has a viscosity less than about 3000 Pa.s measured according to the standard ISO11443.
A process for the preparation of a laminate comprising a substrate having on a surface thereof a thermoplastic polymer resin coating and further comprising a release layer in contact with the surface of said thermoplastic polymer resin remote from the substrate, the release layer being peelable from the thermoplastic polymer resin, said process comprising the steps of forming or providing a substrate layer and coextruding the thermoplastic polymer resin coating and release layer onto the substrate, said release layer having a thickness less than the thickness of said thermoplastic polymer resin coating, wherein the thermoplastic polymer resin has a viscosity less than about 3000 Pa.s measured according to the standard ISO11443 at a temperature 20 to 35° C. below the extrusion temperature.
A process for the preparation of a laminate comprising a polyolefin substrate having on a surface thereof a tie layer, said tie layer having a thermoplastic polymer resin coating on a surface thereof remote from said substrate, and further comprising a release layer in contact with a surface of said thermoplastic polymer resin remote from the substrate, the release layer being peelable from the thermoplastic polymer resin, said process comprising the steps of forming or providing a substrate layer and coextruding the tie layer, the thermoplastic polymer resin coating and the release layer onto the substrate, said release layer having a thickness less than the thickness of said thermoplastic polymer resin coating, wherein the tie layer comprises a copolymer of ethylene and vinyl acetate, and the thermoplastic polymer resin comprises one or more copolyetheresters(s), the thermoplastic polymer resin having a viscosity less than about 3000 Pa.s measured according to the standard ISO11443 at a temperature 20 to 35° C. below the extrusion temperature, and wherein
A process for the preparation of a laminate comprising a substrate having on a surface thereof a thermoplastic polymer resin coating and further comprising a release layer in contact with the surface of said thermoplastic polymer resin remote from the substrate, the release layer being peelable from the thermoplastic polymer resin, said process comprising the steps of forming or providing a substrate layer and coextruding the thermoplastic polymer resin coating and release layer onto the substrate, wherein the thermoplastic polymer resin has a viscosity less than about 3000 Pa.s measured according to the standard ISO11443 at a temperature 20 to 35° C. below the extrusion temperature, and wherein TRL/TCL is from about 0.05 to about 0.8 where TRL is the thickness of the release layer and TCL is the thickness of the thermoplastic polymer resin coating.
Dependencies are inferred from the claim text.