Filaments and fibers having discontinuous cavities

Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber

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264 51, 264 53, 264211, 521 79, 521 81, 521182, 521184, C08J 930, B29D 2700

Patent

active

041646037

ABSTRACT:
A filament of a thermoplastic synthetic polymer having a plurality of adjacent, separate discontinuous cavities is made by a process wherein a silicone oil and an inert gas or gas-forming substance are dispersed in a polymer melt, and the melt is extruded into a filament. The melt contains up to and including 1% by weight of the silicone oil, based on the weight of the melt, at the time it is extruded and up to and including 10% by weight of an inert gas.

REFERENCES:
patent: 3095258 (1963-06-01), Scott
patent: 3627867 (1971-12-01), Schwarz
patent: 3644230 (1972-02-01), Cronin
patent: 3907963 (1975-09-01), Blackmon
patent: 3912666 (1975-10-01), Spitzer et al.
patent: 3912667 (1975-10-01), Spitzer et al.
patent: 3960792 (1976-06-01), Nakamura
patent: 4013597 (1977-03-01), Granda et al.

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