Filaments and fibers having discontinuous cavities
AssigneeAkzona Incorporated
InventorsErhard Siggel, Gerhard Wick, Heinz Linhart, Erich Kessler
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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.
Claims5
A filament or fiber of thermoplastic, synthetic fiber-forming polymer having a plurality of adjacent, separate, discontinuous cavities of substantially uniform size and containing from 0.1% to 1% by weight of a disubstituted polysiloxane finely distributed in the polymer, and a cavity content of 5 to 50 vol. %, based on the total volume of the filament.
Dependencies are inferred from the claim text.