Hollow filamentary structures

Details Hollow filamentary structures Hollow filamentary structures

1975-02-24

1976-04-06

Kendell, Lorraine T.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

423447, 428224, 428280, 428292, 428366, 428398, 428902, B32B 900, D02G 300

Patent

active

039491153

ABSTRACT:
A process for producing a hollow carbon or ion-exchange filament which comprises treating a filament consisting of a fiber-forming polymer of predominantly an uncured novolak resin composition with a curing reagent in the presence of a curing catalyst to effect the cure of the filament extending from the peripheral portion to the axial portion thereof to a depth of 20-90% of the cross-sectional area of the filament, removing the uncured core portion of the filament by extraction with a solvent, and then subjecting the resulting hollow novolak resin filament to a carbonization treatment or introducing an ion-exchangeable group into the resulting hollow novolak resin filament; and products produced by this process.

REFERENCES:
patent: 3351484 (1967-11-01), Gutzeit
patent: 3565749 (1971-02-01), Wizon

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