Process for the production of highly expanded polyolefin insulat

Details Process for the production of highly expanded polyolefin insulat Process for the production of highly expanded polyolefin insulat

1981-07-01

1984-08-28

Lusignan, Michael R.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

428461, 174110F, 174110PM, 174120C, 264 459, 264 461, 264174, 264176R, 264 455, 156 51, 156 78, 156 83, 156201, 15624411, 15624412, H01B 1118, B32B 2706, B32B 2732, B32B 1508

Patent

active

044684355

ABSTRACT:
A process for producing a highly expanded polyolefin insulated cable comprising the steps of feeding a compound of polyolefin, nucleating agent and volatile liquid to an extruder, heat extruding said compound through said extruder onto an inner conductor passing through said extruder to cover the outer periphery of said inner conductor thereby forming an insulation layer of highly expanded polyolefin foam having a foaming ratio in excess of 2.5 times (60% expansion degree) tightly adhered to said inner conductor.

REFERENCES:
patent: 2291670 (1942-08-01), Wiley et al.
patent: 2308638 (1943-01-01), Balthis et al.
patent: 2422281 (1947-06-01), Adams
patent: 3764642 (1973-10-01), Boutillier
patent: 3840384 (1974-10-01), Reade et al.
patent: 3903233 (1975-09-01), Dougherty
patent: 3968463 (1976-07-01), Boysen

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