Back to results
US 6,120,718 AGranted
Process of making hollow filaments
AssigneeBASF SE
InventorsRichard Kotek, Wei Li, Gary W. Shore, Ling Yeh
Life of this patent
Estimating the term…
Abstract
A process for producing hollow polyamide filaments having at least one continuous void that adds to a fiber-forming polyamide from about 0.05% to about 5% of a triazine compound prior to extrusion of fiber. The process results in a greater closure of voids and larger void space than when the triazine compound is not used.
Claims10
A process for producing polyamide filaments having at least one continuous void comprising the steps of:
- a) adding to a fiber-forming polyamide from about 0.05% to about 5% of a triazine compound of the structure:
- ##STR4## wherein n is an integer from 2 to 20, R.sub.1 is NH-tert. octyl, morpholine, or NH-cyclohexyl;
- b) mixing said triazine compound with said fiber-forming polyamide to form a blend;
- c) homogenizing said blend;
- and
- extruding said blend through a spinneret to form filaments having at least one continuous void, wherein at least about 50% more voids close, and the size of the voids is about 20% larger than when said triazine compound is not mixed with said fiber-forming polyamide prior to said extruding.
3 more elements
Dependencies are inferred from the claim text.