Fabric incorporating polymer filaments having profiled cross-section
The present invention is directed to a multi-filament yarn formed at least in part from filaments having cross-sectional zig-zag or double “W” shape with a 180 degree axis of symmetry. The filaments have a denier per filament generally in the range of about 0.1 to about 4.0. Fabrics made from yarns formed with the filaments have high moisture wicking, soft hand, and a silk-like lustrous appearance.
1. A fabric formed at least in part from a synthetic polymer filament comprising a transverse cross-section that includes at least seven contiguous segments in zig-zag configuration, said cross-section having a nominal width, a nominal length and a nominal thickness, wherein the filament has an indentation to thickness ratio between about 0.25 and 0.6, and wherein a wetting agent selected from the group consisting of a hydrophilic polyamide, hydrophilic silicone, and hydrophilic polyester is applied to at least one side of said fabric.
2. The fabric of claim 1 , wherein adjacent segments of the synthetic polymer filament form an angle between about 40 degrees and about 60 degrees.
3. The fabric of claim 1 , wherein the synthetic polymer filament comprises a polyamide synthetic polymer selected from the group consisting of: polyhexamethylene adipamide; polycaproamide; polyenanthamide; nylon 10; polydodecanolactam; polytetramethylene adipamide; polyhexamethylene sebacamide homopolymer; a polyamide of n-dodecanedioic acid and hexamethylenediamine homopolymer; and a polyamide of dodecamethylenediamine and n-dodecanedioic acid.
4. The fabric of claim 1 , wherein a ratio of the nominal width to the nominal thickness of the synthetic polymer filament is less than about 3.
5. The fabric of claim 1 wherein the synthetic polymer filament has a denier per filament between about 0.1 and about 4.0.
6. The fabric of claim 1 , wherein said fabric is a double sided fabric comprising the synthetic polymer filament on one side of the fabric.
7. The fabric of claim 6 , wherein the wetting agent is applied to the one side.
8. A fabric comprising at least in part a yarn formed from a synthetic polymer filament comprising a transverse cross-section that includes at least seven contiguous segments in zig-zag configuration, said cross-section having a nominal width, a nominal length and a nominal thickness, wherein the filament has an indentation to thickness ratio between about 0.25 and 0.6, and wherein a wetting agent selected from the group consisting of a hydrophilic polyamide, hydrophilic silicone, and hydrophilic polyester is applied to at least one side of said fabric.
9. The fabric of claim 8 , wherein the yarn is formed from a number of filaments and the synthetic polymer filament comprises at least about 50% of the number of filaments in said yarn.
10. The fabric of claim 9 wherein the yarn has denier of between about 15 and about 200.
11. The fabric of claim 8 , wherein said fabric is a double sided fabric comprising the yarn with synthetic polymer filament on one side of the fabric.
12. The fabric of claim 11 , wherein the wetting agent is applied to the one side.