Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2004-04-27
2009-08-25
Mulcahy, Peter D. (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C264S040600, C264S210100, C526S089000, C526S206000, C526S214000, C526S254000, C526S255000
Reexamination Certificate
active
07579418
ABSTRACT:
The present invention relates to the process of extruding melt drawing fluoropolymer onto conductor to form insulated conductor at a line speed of at least 533 m/min and having no more than 10 sparks and no more than 2 lumps/13.7 km of insulated conductor under conditions that comprise an adequate process window to allow for these results to be obtained at different conditions within the process window. The invention identifies the critical parameters for achieving this process window, namely melt flow rate of the fluoropolymer, preferably being 30±3 g/10 min, and the melt temperature of the extruding/melt-drawing step, preferably being 393° C.±6° C.
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DeFeo Patrick Anthony
Heffner Glenn W.
McKee Niall D.
Venkataraman Sundar Kilnagar
E. I. du Pont de Nemours and Company
Hu Henry
Mulcahy Peter D.
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