Coextruded multi-layered articles
First Claim
1. An impact resistant laminated article in the form of an extruded sheet having a thickness of greater than 10 mils and having a multi-layered structure comprising, on the average, alternating layers of coextruded polymeric, thermoplastic materials wherein the number of layers is greater than or equal to about 40, and wherein one of said materials forming said alternating layers contains a carbonate polymer;
- and the alternating layers containing carbonate polymer are bound in an essentially contiguous relationship to adjacent layers of the other polymeric materials comprising said article, wherein said alternating layers are in the form of thin films each having a relatively sharply defined interface and are generally parallel to the major surface of said article;
said article being comprised of from about 35 to about 90 percent by volume of said layers containing carbonate polymer.
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Accused Products
Abstract
Laminated articles in the form of an extruded sheet have a multi-layered structure and comprise, on the average, alternating layers of coextruded polymeric thermoplastic materials, wherein one of said materials comprises a carbonate polymer. The articles exhibit good impact resistance even when scratched or notched, hydrolytic stability and transparency.
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Citations
24 Claims
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1. An impact resistant laminated article in the form of an extruded sheet having a thickness of greater than 10 mils and having a multi-layered structure comprising, on the average, alternating layers of coextruded polymeric, thermoplastic materials wherein the number of layers is greater than or equal to about 40, and wherein one of said materials forming said alternating layers contains a carbonate polymer;
- and the alternating layers containing carbonate polymer are bound in an essentially contiguous relationship to adjacent layers of the other polymeric materials comprising said article, wherein said alternating layers are in the form of thin films each having a relatively sharply defined interface and are generally parallel to the major surface of said article;
said article being comprised of from about 35 to about 90 percent by volume of said layers containing carbonate polymer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
- and the alternating layers containing carbonate polymer are bound in an essentially contiguous relationship to adjacent layers of the other polymeric materials comprising said article, wherein said alternating layers are in the form of thin films each having a relatively sharply defined interface and are generally parallel to the major surface of said article;
Specification