Fibers of polymer-wax compositions

Patent metadata

Field	Value
Publication number	US-9926653-B2
Application number	US-201514920912-A
Country	US
Kind code	B2
Filing date	Oct 23, 2015
Priority date	May 20, 2011
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

Disposable article or nonwoven that includes a first fiber layer comprising a plurality of fibers, each of which comprising an intimate admixture of a thermoplastic polymer, and a wax and/or oil, wherein at least some of the wax and/or oil is exposed at an outer surface of the fibers and wherein a surface energy treatment is disposed on at least some of the plurality of fibers; and a second fiber layer that is adjacent the first fiber layer and that comprises a plurality of cellulosic fibers.

First claim

What is claimed is:

1. A nonwoven comprising:
a. a first fiber layer comprising a plurality of fibers, each of which comprising an intimate admixture of a thermoplastic polymer, and a wax and/or oil, wherein at least some of the wax and/or oil is exposed at an outer surface of the fibers and wherein a surface energy treatment is disposed on at least some of the plurality of fibers, wherein the plurality of fibers comprise bicomponent fibers comprising a first component and a second component, wherein the concentration of intimate admixture of thermoplastic polymer and wax and/or oil in the first component is different than the second component; and
b. a second fiber layer that is adjacent the first fiber layer and that comprises a plurality of cellulosic fibers.

2. The nonwoven of claim 1 , wherein the plurality of fibers comprise an intimate admixture of the thermoplastic polymer, the wax, and the oil.

3. The nonwoven of claim 1 , wherein the plurality of fibers comprise bicomponent fibers comprising a first component and a second component, and wherein the wax or oil is primarily included in just one of the first component and the second component.

4. The nonwoven of claim 1 , wherein the nonwoven comprises fine fibers having a diameter of from 0.1 microns to about 5 microns.

5. The nonwoven of claim 1 , wherein the wax and/or oil comprises a stearic acid.

6. The nonwoven of claim 1 , wherein the wax and/or oil comprises a triglyceride.

7. The nonwoven of claim 1 , wherein the cellulosic fibers comprise rayon fibers.

8. The nonwoven of claim 1 , wherein the nonwoven comprises mechanical entanglement, hydrodynamic entanglement, or needle punching.

9. The nonwoven of claim 1 , further comprising an additive associated with the wax and/or oil.

10. The nonwoven of claim 9 , wherein the additive is a perfume.

11. The nonwoven of claim 9 , wherein the additive is a colorant.

12. The nonwoven of claim 11 , wherein the colorant comprises a pigment or dye.

13. The nonwoven of claim 12 , wherein the pigment or dye is selected from the group comprising yellow pigment, red pigment, blue pigment, black pigment, blue dye, red dye, yellow dye, orange dye, and combinations thereof.

14. The nonwoven of claim 1 , wherein the concentration intimate admixture of thermoplastic polymer and wax and/or oil is higher in the first component than in the second component.

15. The nonwoven of claim 14 , wherein the bicomponent fibers have a sheath-core configuration, wherein the first component is the sheath and wherein the second component is the core.

16. The nonwoven of claim 14 , wherein the bicomponent fibers have a sheath-core configuration, wherein the first component is the core and wherein the second component is the sheath.

17. The nonwoven of claim 1 , wherein the bicomponent fibers have a sheath-core configuration, wherein the first component is the sheath and wherein the second component is the core, wherein the intimate admixture of thermoplastic polymer and wax and/or oil is present in the sheath and not the core.

18. The nonwoven of claim 1 , wherein the bicomponent fibers have a sheath-core configuration, wherein the first component is the sheath and wherein the second component is the core, wherein the intimate admixture of thermoplastic polymer and wax and/or oil is present in the core and not the sheath.

Assignees

• Procter & Gamble

Inventors

• Allen Jr William Maxwell
• Bond Eric Bryan
• Noda Isao
• Gorley Ronald Thomas
• Isele Olaf Erik Alexander

Classifications

• C08L23/06

  Polyethylene · CPC title

• A61L15/34 Primary

  Oils, fats, waxes or natural resins {(A61L15/225 takes precedence)} · CPC title

• C08L91/06

  Waxes · CPC title

• C08L23/10

  Homopolymers or copolymers of propene · CPC title

• C08L23/12

  Polypropene · CPC title