Method for increasing resistance to treeing in polymeric insulat

Details Method for increasing resistance to treeing in polymeric insulat Method for increasing resistance to treeing in polymeric insulat

1981-06-18

1982-11-23

Hoffman, James R.

Coating processes

Measuring, testing, or indicating

209576, 209578, 209580, 209581, 250362, 250365, 2504591, 427 541, 427117, 427120, 2504611, B05D 720, G01B 1500

Patent

active

043605397

ABSTRACT:
A method for increasing resistance to treeing in a polymeric layer comprising an insulating layer on a metal conductor. Pellets of an organic polymeric material also containing an organo silane treeing inhibitor are exposed to ultraviolet radiation, and pellets having portions fluorescing above a predetermined threshold level are separated from the remainder. The remaining pellets are blended together and applied to a metal conductor to form a coating on the conductor. In a preferred embodiment, the organic polymeric material is high molecular weight polyethylene, and the ultraviolet radiation has a wavelength of about 3000 to 4000 A.

REFERENCES:
patent: 3011634 (1961-12-01), Hutter et al.
patent: 3305089 (1967-02-01), Fraenkel
patent: 4144202 (1979-03-01), Ashcraft et al.
patent: 4212756 (1980-07-01), Ashcraft et al.
patent: 4263158 (1981-04-01), Ashcraft et al.

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