Elastic fiber containing an anti-tack additive
View Patent ↗Anti-tack additives for elastic fibers and methods of preparing the same are included. The elastic fibers include a substituted cellulose additive.
1. An elastic fiber comprising polyurethane or polyurethaneurea and about 0.5% to 25% by weight of a soluble anti-tack composition wherein the soluble anti-tack composition includes a substituted cellulose selected from the group consisting of: cellulose butyrate, cellulose acetate butyrate, cellulose acetate propionate, and a mixture thereof.
2. The elastic fiber of claim 1 , further comprising at least one additional additive selected from the group consisting of calcium stearate, magnesium stearate, organic stearates, silicon oil, mineral oil, and mixtures thereof.
3. The elastic fiber of claim 1 , wherein said substituted cellulose is present in an amount of about 0.5% to 5.0% by weight of the fiber.
4. The elastic fiber of claim 1 , wherein said cellulose acetate butyrate includes from about 35% to 57% weight percent butyryl content or said cellulose acetate propionate includes about 40% to 50% weight percent propionyl content.
5. The elastic fiber of claim 1 , wherein said cellulose acetate butyrate includes about 50% to 57% by weight butyryl content.
6. The elastic fiber of claim 1 , wherein the fiber includes from about 0.1% to about 1% of a silicon oil or a mineral oil.
7. The elastic fiber of claim 6 , wherein the silicon oil or mineral oil has a viscosity of about 5 centistokes to about 150 centistokes.
8. The elastic fiber of claim 1 , further comprising at least one particulate anti-tack agent.
9. The elastic fiber of claim 1 , wherein said fiber excludes a spin finish.
10. The elastic fiber of claim 1 , further comprising a topically applied mineral oil or silicon oil, or blends containing mineral oil or silicon oil as a spin finish in an amount of about 0.5% to 7.0% by weight of the final fiber once applied.
11. An elastic fiber comprising polyurethane or polyurethaneurea and about 0.5 to 25% by weight of cellulose acetate butyrate, wherein said cellulose acetate butyrate includes about 35% to 57% by weight butyryl content.
12. The elastic fiber of claim 11 , wherein said cellulose acetate butyrate includes about 50% to 57% by weight butyryl content.
13. The elastic fiber of claim 11 , further comprising at least one additive selected from the group consisting of: calcium stearate, magnesium stearate, organic stearate, silicon oil, mineral oil, and mixtures thereof.
14. The elastic fiber of claim 11 , wherein said fiber excludes a spin finish.
15. The elastic fiber of claim 11 , further comprising a topically applied mineral oil or silicon oil or blends containing mineral oil or silicon oil as a spin finish in an amount of about 0.5% to 7.0% by weight of the fiber final fiber once applied.
16. A process for preparing an elastic fiber comprising:
(a) preparing a composition including at least one polyurethane, polyurethaneurea, or a mixture thereof;
(b) adding to the composition about 0.5% to 25% by weight of an anti-tack composition wherein the anti-tack composition is selected from cellulose acetate butyrate, cellulose acetate propionate, and a mixture thereof;
(c) adding to the composition at least one additive selected from the group consisting of: calcium stearate, magnesium stearate, organic stearate, silicon oil, mineral oil, and mixtures thereof; and
(d) preparing fiber from the composition by a spinning process selected from the group consisting of: wet spinning, dry spinning and melt spinning.
17. The process of claim 16 , wherein said cellulose acetate butyrate includes about 35% to 57% by weight butyryl content.
18. The process of claim 16 , wherein said cellulose acetate butyrate includes about 50% to 90% by weight butyryl content.
19. A fabric comprising an elastic fiber comprising polyurethane or polyurethaneurea and about 0.5% to 25% by weight of a soluble anti-tack composition wherein the soluble anti-tack composition includes a substituted cellulose selected from the group consisting of: cellulose butyrate, cellulose acetate butyrate, cellulose acetate propionate, and a mixture thereof.
20. The fabric of claim 19 , further comprising at least one additional additive selected from the group consisting of calcium stearate, magnesium stearate, organic stearates, silicon oil, mineral oil, and mixtures thereof.
21. The fabric of any one of claim 19 or 20 , wherein said fabric includes a knit, woven, or non-woven construction.
22. The fabric of any one of claim 19 or 20 comprising a garment.
23. A laminate structure comprising:
an elastic fiber comprising polyurethane or polyurethaneurea and about 0.5% to 25% by weight of a soluble anti-tack composition wherein the soluble anti-tack composition includes a substituted cellulose selected from the group consisting of: cellulose butyrate, cellulose acetate butyrate, cellulose acetate propionate, and a mixture thereof;
wherein said fiber is adhered to one or more layers of a substrate selected from the group consisting of: fabric, nonwoven, film, and combinations thereof.
24. The laminate of claim 23 , further comprising at least one additional additive selected from the group consisting of calcium stearate, magnesium stearate, organic stearates, silicon oil, mineral oil, and mixtures thereof.
25. The laminate of any one of claim 23 or 24 , wherein said laminate is adhered by an adhesive, ultrasonic bonding, thermal bonding, or combinations thereof.
26. The laminate of any one of claim 23 or 24 , comprising a disposable hygiene article.
27. The laminate structure of claim 26 , wherein said disposable hygiene article is selected from the group consisting of diapers, training pants, adult incontinence articles and feminine hygiene articles.