MULTILAYER SHEET AND METHODS OF MAKING AND ARTICLES COMPRISING THE MULTILAYER SHEET
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United States of America Patent
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Issued Date -
Oct 24, 2013
app pub date -
Apr 23, 2012
filing date -
Apr 23, 2012
priority date (Note) -
Abandoned
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Abstract
In an embodiment, a method of making an article comprises: co-extruding a core layer formed from a core composition comprising a core thermoplastic polymer and a first cap layer formed from a first cap composition comprising an intumescent flame retardant material to form the article; and thermoforming the article. In an embodiment, a multilayer sheet, comprises: an extruded first cap layer formed from a first cap composition comprising an intumescent flame retardant material; and a co-extruded core layer formed from a core composition comprising a thermoplastic polymer, wherein the first cap layer is disposed upon and in intimate contact with a surface of the core layer; wherein the first cap layer and the second cap layer have an adhesion test value of greater than 2 as measured according to ASTM D3359-02 before thermoforming the first cap layer and the second cap layer.
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