Adhesive bonding and miscellaneous chemical manufacture – Methods – Making electrical conductors of indefinite length
Patent
1981-02-17
1982-03-16
Kimlin, Edward C.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Making electrical conductors of indefinite length
156185, 156190, 156192, 156195, 174102D, 174102R, 174107, 174109, 174110FC, 174110N, 174113R, 174121A, 428377, 428921, H01B 1326, H01B 734
Patent
active
043199402
ABSTRACT:
A method of making a cable (20) specially suited for use in building plenums because of its low flame spread and smoke evolution includes enclosing a multiconductor core (22) in a sheath comprising an inorganic, cellular core wrap (31), a corrugated metallic barrier (40) and dual layers (51) and (52) of a polyimide tape. The tapes are wrapped helically about the barrier in a manner that avoids a compression of the core wrap. The sheath is effective to resist heat transfer inwardly toward the core by conduction while the metallic barrier reflects radiant heat. Advantageously, the sheath containerizes the core without unduly compressing it and thereby allows the intumescence of conductor insulation during a fire to form char which is effective to suppress the evolution of smoke and the propagation of flame.
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"Plenum Cable or Teflon.RTM. FEP", DuPont Undated Brochure.
"Kapton.RTM. Polyimide Film", DuPont Undated Brochure.
"Kapton.RTM. Polyimide Film-High Performance Wire and Cable Insulation", DuPont Undated Brochure.
Arroyo Candido J.
Cogelia Nicholas J.
Darsey Ralph J.
Bell Telephone Laboratories Incorporated
Dawson Robert A.
Kimlin Edward C.
Somers E. W.
Western Electric Company Inc.
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