Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Layered – stratified traversely of length – or multiphase...
Patent
1981-05-13
1983-01-04
Thurlow, Jeffery R.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Layered, stratified traversely of length, or multiphase...
264349, 366 81, 366 89, 425113, 425208, B29F 310
Patent
active
043671900
ABSTRACT:
An insulating coating of extruded polymer material is formed around a moving conductor wire; the extruder includes a decompression zone effective to arrest shear degradation of the polymer such that the melt index of the insulating polymer on the insulated wire is not more than 50% of the melt index of the solid, particulate polymer material before extrusion; the extruder includes valve means and intense mixing means which ensure that the polymer melts in a controlled manner whereby a uniform extrudate is formed.
REFERENCES:
patent: 3486193 (1969-12-01), Gwinn et al.
patent: 3701512 (1972-10-01), Schippers et al.
patent: 3762693 (1973-10-01), De Boo et al.
patent: 4053143 (1977-10-01), Hosokawa et al.
patent: 4103353 (1978-07-01), Dougherty
patent: 4107260 (1978-08-01), Dougherty
patent: 4181647 (1980-01-01), Beach
patent: 4250132 (1981-02-01), Beach
Phillips Cables Limited
Thurlow Jeffery R.
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