Liquid-impregnated nonwoven fabric which contains zinc oxide-containing cellulose fibers

Patent metadata

Field	Value
Publication number	US-10456340-B2
Application number	US-201515518686-A
Country	US
Kind code	B2
Filing date	May 12, 2015
Priority date	Oct 28, 2014
Publication date	Oct 29, 2019
Grant date	Oct 29, 2019

Abstract

The present invention relates to a formed fabric which contains cellulose fibers, which contain zinc oxide particles which are at least partially incorporated and which is additionally impregnated with a liquid, and to a method of its production and to its use, in particular for manufacturing preservative-free, moist wet wipes.

First claim

The invention claimed is:

1. A formed fabric comprising cellulose fibers, wherein the cellulose fibers comprise zinc oxide particles spun into the cellulose fibers and wherein the formed fabric is impregnated with a liquid, wherein the liquid has a pH between 3 and 6.

2. The formed fabric according to claim 1 , wherein the liquid comprises an organic or inorganic acid which forms zinc salts which have a solubility of more than 50 ppm in 18-MOhm water at 25° C. and an atmospheric pressure of 1013 hPa.

3. The formed fabric according to claim 1 , wherein the cellulose fibers with spun-in zinc-oxide comprise between 0.1 and 10 wt % zinc oxide relative to absolutely dry cellulose.

4. The formed fabric according to claim 3 , wherein the cellulose fibers with spun-in zinc-oxide comprise between 0.3 and 4.5 wt % zinc oxide relative to absolutely dry cellulose.

5. The formed fabric according to claim 4 , wherein the cellulose fibers with spun-in zinc-oxide comprise between 0.3 and 3.5 wt % zinc oxide relative to absolutely dry cellulose.

6. The formed fabric according to claim 1 , further comprising zinc-oxide-free cellulose fibers.

7. The formed fabric according to claim 1 , further comprising synthetic fibers.

8. The formed fabric according to claim 1 , wherein the cellulose fibers are selected from the group consisting of staple fibers and endless filament fibers.

9. The formed fabric according to claim 1 , wherein said fiber has a fiber-fiber friction of 8.5 N or higher measured with the sledge test.

10. The formed fabric according to claim 3 , wherein the liquid has a pH between 4.0 and 5.5.

11. A method for the manufacturing of a formed fabric by traditional fleece manufacturing methods, comprising providing cellulose fibers which comprise spun-in zinc oxide, wherein the cellulose of fibers form fleece and that the formed fabric is impregnated with a liquid, wherein the liquid has a pH between 3 and 6.

12. A moist wet wipe comprising a formed fabric which comprises cellulose fibers with spun-in zinc-oxide, wherein said wipe is impregnated with a liquid, wherein the liquid has a pH between 3 and 6.

13. The wipe according to claim 12 , wherein the wipe comprises no additional preservative agents.

14. A moist face mask comprising a formed fabric which comprises cellulose fibers with spun-in zinc-oxide, wherein said mask is impregnated with a liquid having a pH between 3 and 6 and wherein said mask has skin-caring action.

Assignees

• Chemiefaser Lenzing Ag

Inventors

• Häubl Martin

Classifications

• A61K8/8147

  Homopolymers or copolymers of acids; Metal or ammonium salts thereof, e.g. crotonic acid, (meth)acrylic acid; Compositions of derivatives of such polymers · CPC title

• A61K2800/624

  by macromolecular compounds · CPC title

• A61K8/731

  Cellulose; Quaternized cellulose derivatives · CPC title

• A61K8/27 Primary

  Zinc; Compounds thereof · CPC title

• A61K8/0208

  Tissues; Wipes; Patches · CPC title