Plastic and nonmetallic article shaping or treating: processes – Direct application of electrical or wave energy to work – Using direct contact of electrode or electrical wire with...
Patent
1996-01-16
1998-09-01
Derrington, James
Plastic and nonmetallic article shaping or treating: processes
Direct application of electrical or wave energy to work
Using direct contact of electrode or electrical wire with...
264452, 264477, 264105, 264235, 264346, B29C 3502
Patent
active
058007687
ABSTRACT:
A method for the thermal treatment of an electroconductive polymeric pyrogen in which two parallel conductors are incorporated and electroconductive carbon black is dispersed in an insulating polymer, comprising the step of heating the pyrogen in an oven simultaneously while applying an electric field to the pyrogen through a lid line connected from the two conductors to an external power source, by which a desired final resistance can be obtained in a far shorter time while preventing the polymer from being degraded.
REFERENCES:
patent: 2324644 (1943-07-01), Powell et al.
patent: 3503823 (1970-03-01), Richart et al.
patent: 3823217 (1974-07-01), Kampe
patent: 4426339 (1984-01-01), Kamath et al.
Kim Hyun Suk
Kim Tae Min
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