Poly(trimethylene terephthalate)/poly(alpha-hydroxy acid) bi-constituent filaments
View Patent ↗This invention relates to poly(trimethylene terephthalate)/poly(alpha-hydroxy acid) biconstituent filaments, methods for making the same and end uses thereof.
1. A continuous, biconstituent filament comprising poly(trimethylene terephthalate) and about 0.5 to about 18 weight %, by weight of the filaments, of poly(alpha-hydroxy acid).
2. The continuous, biconstituent filament of claim 1 , comprising about 82 to about 95.5 wt %, by weight of the filament, of the poly(trimethylene terephthalate).
3. The continuous, biconstituent filament of claim 1 , wherein the poly(alpha-hydroxy acid) is polylactic acid.
4. The continuous, biconstituent filament of claim 1 , wherein the polylactic acid is a bio-derived polymer.
5. The continuous, biconstituent filament of claim 1 , wherein the poly(trimethylene terephthalate) is made with a 1,3-propane diol prepared by a fermentation process using a renewable biological source.
6. The continuous, biconstituent filament of claim 3 , wherein the poly(trimethylene terephthalate) is made with a 1,3-propane diol prepared by a fermentation process using a renewable biological source.
7. The continuous, biconstituent filament of claim 4 , wherein the poly(trimethylene terephthalate) is made with a 1,3-propane diol prepared by a fermentation process using a renewable biological source.
8. The continuous, biconstituent filament of claim 1 , which contains about 0.1 to about 10 wt % polystyrene dispersed throughout the filament.
9. The continuous, biconstituent filament of claim 1 which is an uncrimped continuous, biconstituent filament.
10. The continuous, biconstituent filament of claim 1 , which is about 0.5 to about 35 dpf.
11. The continuous, biconstituent filament of claim 1 , which is a monofilament of about 10 to about 2000 dpf.