Polymer filaments having profiled cross-section
AssigneeInvista North America S.A.R.L.
InventorPeter Michael Lancaster
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Abstract
The invention provides a profiled polymer filament having an open hollow cross-sectional shape normal to the longitudinal axis of the filament, wherein the cross-section is dimensioned to prevent the filament from interlocking with a second filament of the same cross-section. The invention also provides methods of manufacture of such filaments by melt spinning a polyamide, and spinnerets suitable for use in melt spinning such filaments.
Claims10
A polymer yarn comprising at least a single profiled filament having an open hollow cross-sectional profile shape normal to the longitudinal axis of the filament, said cross-sectional profile shape having a central arcuate portion and first and second elongated leg portions, each of said leg portions having proximal and distal end portions, said proximal end portions joining to said central portion and said distal end portions joining to foot portions on each leg portion, said foot portions having a dimension F, said leg portions and said central arcuate portion defining an open portion, said leg portions oriented in a substantially parallel relationship, and said foot portions defining an aperture leading to said open portion;
- said aperture having a dimension D, wherein dimension D is less than dimension F.
Dependencies are inferred from the claim text.