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US 10,245,817 B2Granted
Method of laminating absorbable semi-crystalline polymeric films
AssigneeEthicon, Inc.
InventorsSasa Andjelic, Dominick Egidio
Life of this patent
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Abstract
The invention relates to novel processes for the lamination of semi-crystalline, high-melting point, low glass transition polymeric films, which are extruded and subsequently laminated on various thermally sensitive substrates to form laminated medical device constructs in a specific time interval to allow low processing temperatures to avoid polymer film and/or substrate degradation or heat-related distortions. Also disclosed are laminated medical device constructs made from such processes.
Claims10
A method of making a laminated medical device construct, comprising:
- a) extruding a polymer film having a semi-crystalline structure and a melting point temperature of 140° or higher, a glass transition temperature below 25° C., and a crystallinity, said polymer film being crystallizable at room/ambient conditions;
- b) laminating the polymer film directly to a substrate, said substrate being thermally sensitive and polymeric, to form the laminated medical device construct by conducting a thermal/pressure laminating step within about 10 minutes after the polymer film has been extruded wherein the polymer film has a crystallinity of about 10% or less in order to laminate said polymer film onto a substrate at a temperature of about 120° C. or lower, wherein the substrate is not damaged and the polymer film is effectively laminated to the substrate.
Dependencies are inferred from the claim text.