Extrusion process
AssigneesE. I. Du Pont de Nemours and Company, AlphaGary Corporation
InventorsYevgeniy I. Globus, Mark A. Jozokos, John L. Netta, George Martin Pruce, Sundar Kilnagar Venkataraman
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Abstract
The present invention relates to the extrusion of a composition comprising tetrafluoroethylene/hexafluoropropylene copolymer, 10-60 wt % inorganic particulate filler, and hydrocarbon polymer for dispersing the filler in the copolymer, preferably 0.1 to 5 wt % hydrocarbon polymer, at low temperatures, e.g. up to 650° F. (343° C.).
Claims11
A process comprising extruding a composition comprising tetrafluoroethylene/hexafluoropropylene copolymer, about 10-60 wt % inorganic particulate filler, and an effective amount of hydrocarbon polymer to disperse said particulate filler in said copolymer either during melt blending prior to said extruding of said composition or during said extruding, the amount of said copolymer, filler and polymer totaling 100 wt %, wherein said extruding is carried out at a melt temperature ranging from about 520° F. (271° C.) to 650° F. (343° C.), said effective amount of hydrocarbon polymer being about 0.5 to 3 wt %, wherein said copolymer and said hydrocarbon polymer are incompatible to one another and said hydrocarbon polymer is an aromatic-containing thermoplastic elastomer.
A process comprising extruding a composition comprising tetrafluoroethylene/hexafluoropropylene copolymer, 20 to 50 wt % inorganic particulate filler, about 0.1 to 5 wt % of hydrocarbon polymer to disperse said particulate filler in said copolymer either during melt blending prior to said extruding of said composition or during said extruding, the amount of said copolymer, filler and polymer totaling 100 wt %, wherein said extruding is carried out at a melt temperature ranging from about 560° F. (293° C.) to 620° F. (326° C.) to form cable jacket, wherein said copolymer and said hydrocarbon polymer are incompatible to one another and said hydrocarbon polymer is an aromatic-containing thermoplastic elastomer.
Dependencies are inferred from the claim text.