Plastic and nonmetallic article shaping or treating: processes – Vacuum treatment of work – To degas or prevent gas entrapment
Patent
1979-04-17
1981-03-31
Thurlow, Jeffery R.
Plastic and nonmetallic article shaping or treating: processes
Vacuum treatment of work
To degas or prevent gas entrapment
174110PM, 174120SC, 264174, 264236, 264344, 264345, 264347, 425384, 425404, 425445, B29C 2500
Patent
active
042592810
ABSTRACT:
A process for reducing micro-voids in cross-linked cable insulation without reducing the voltage breakdown strength thereof in which process the insulation, after cross-linking, is heated at a temperature in the range from about 120.degree. C. to about 150.degree. C. and under a pressure less than 10 mm. Hg for a period from about 8 hours to 48 hours. Also, a cable having such insulation which has micro-voids less than about 10.sup.2 per mm.sup.3 and a perforation gradient greater than the perforation gradient of a cable which has not been so treated.
REFERENCES:
patent: 2462149 (1949-02-01), Webb
patent: 3029473 (1962-04-01), Greenberg
patent: 3452126 (1969-06-01), Sieron
patent: 3513228 (1970-05-01), Miyauchi et al.
patent: 3957719 (1976-05-01), MacKenzie, Jr.
patent: 4029830 (1977-06-01), Yamamoto et al.
"Micro-Voids in Cross-Linked Polyethylene Insulated Cables", IEEE Transactions on Power Apparatus & System Review (vol. PAS 94, No. 4) 7-8/75, pp. 1258-1263.
Lanfranconi Gianmario
Vecellio Bernardino
Industrie Pirelli S.p.A.
Thurlow Jeffery R.
LandOfFree
Process for reducing micro-voids in the extruded insulation of e does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for reducing micro-voids in the extruded insulation of e, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for reducing micro-voids in the extruded insulation of e will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2242614