Method for producing foamed plastic insulator

Details Method for producing foamed plastic insulator Method for producing foamed plastic insulator

1984-04-16

1985-10-15

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 50, 264 54, 264DIG5, 264DIG13, 521 79, 521 95, 521134, 521143, B29D 2700, B29F 310

Patent

active

045473285

ABSTRACT:
A foamed plastic insulator such as an insulated wire having a foamed plastic material insulation layer formed over a conductor. The plastic material includes at least one component having a swelling ratio greater than 55%, and the component comprises at least 20% by weight of the insulation layer. The insulated wire is produced by adding a blowing agent such as a chemical blowing agent and an inert gas and extruding the mixture over a conductor.

REFERENCES:
patent: 3903233 (1975-09-01), Dougherty
patent: 4151238 (1979-04-01), Ziemek et al.
patent: 4260351 (1981-04-01), Takano et al.
Brydson, J. A., Flow Properties of Polymer Melts, London, Iliffe Books, c1970, pp. 63-69.

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