Nonwoven material, use of the nonwoven material, and wiping cloth, dryer sheet and face mask containing the nonwoven material

Patent metadata

Field	Value
Publication number	US-12467169-B2
Application number	US-202318387303-A
Country	US
Kind code	B2
Filing date	Nov 6, 2023
Priority date	Jul 31, 2018
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

The invention relates to a nonwoven as well as to a wipe, a face mask, and a dryer sheet including the nonwoven, which includes a network of molded bodies, the nonwoven, in the dry state, having a specific opacity of greater than or equal to 1.0%·m 2 /g. In order to create a nonwoven of low basis weight, which is easy to produce and has, without special modifications, a high specific opacity, it is proposed that the molded bodies are regenerated cellulosic molded bodies and are materially interconnected via node points to form the network, and the regenerated cellulosic molded bodies comprising monofilament sections extending between node points, whose diameter varies along their lengthwise extension and which have a diameter of less than or equal to 15 μm for at least 90% of their lengthwise extension.

First claim

What is claimed is:

1 . A nonwoven, comprising a network of molded bodies, the nonwoven in the dry state, having a specific opacity of greater than or equal to 1.0%·m 2 /g, wherein the molded bodies are regenerated cellulosic molded bodies and are materially interconnected via node points to form the network, wherein the regenerated cellulosic molded bodies comprise monofilament sections extending between node points, whose diameter varies along their lengthwise extension and which have a diameter of less than or equal to 15 μm for at least 90% of their lengthwise extension, and wherein the regenerated cellulosic molded bodies comprise multifilament sections extending between node points and being formed of two or more monofilament sections that are essentially parallel and that are connected with one another via cohesion of cellulose molecules, the multifilament sections having a diameter of less than or equal to 100 μm for at least 90% of their lengthwise extension.

2 . The nonwoven of claim 1 , wherein the regenerated cellulosic molded bodies form an essentially endless network without visible filament ends.

3 . The nonwoven of claim 1 , wherein the nonwoven is essentially free of matting agents and colorants.

4 . The nonwoven of claim 1 , wherein the nonwoven consists essentially of cellulose.

5 . The nonwoven of claim 1 , wherein the regenerated cellulosic molded bodies are solution-spun cellulosic molded bodies.

6 . The nonwoven of claim 5 , wherein the monofilament sections have a solid cross-section.

7 . The nonwoven of claim 1 , wherein the nonwoven is essentially free of binders or adhesives.

8 . The nonwoven of claim 1 , wherein the nonwoven is essentially free of copper and/or nickel.

9 . The nonwoven of claim 8 , wherein the nonwoven has a copper content of less than 5 ppm and/or a nickel content of less than 2 ppm.

10 . The nonwoven of claim 1 , wherein the monofilament sections have a diameter of less than or equal to 10 μm for at least 90% of their lengthwise extension.

11 . The nonwoven of claim 1 wherein the monofilament sections have an average diameter of greater than or equal to 1 μm and less than or equal to 8 μm.

12 . The nonwoven of claim 1 , wherein the nonwoven in the dry state, has a specific opacity of greater than or equal to 1.2%·m 2 /g.

13 . The nonwoven of claim 1 , wherein the nonwoven has a basis weight of less than or equal to 70 g/m 2 .

14 . The nonwoven of claim 1 , wherein the nonwoven comprises at least one of a property-refining substance, a surface-refining substance, a property-changing substance, a surface-changing substance and processing-facilitating agents at a content of no more than 1% by weight.

15 . The nonwoven of claim 1 , wherein the network of regenerated cellulosic molded bodies comprises several interconnected layers.

16 . A nonwoven of claim 1 for use in hygiene products filters, industrial products, clothing, furnishings, automotive, or leisure products.

17 . A wipe comprising the nonwoven of claim 1 .

18 . The wipe of claim 17 , wherein the nonwoven is impregnated with a lotion.

19 . The wipe of claim 18 , wherein the lotion is essentially non-water-based.

20 . The nonwoven of claim 5 , wherein the solution-spun cellulosic molded bodies are produced according to a lyocell process.

21 . The nonwoven of claim 6 , wherein the monofilament sections have a round cross-section.

22 . The nonwoven of claim 10 , wherein the monofilament sections have a diameter of less than or equal to 7 μm for at least 90% of their lengthwise extension.

23 . The nonwoven of claim 12 , wherein the nonwoven in the dry state has a specific opacity of greater or equal to 1.5%·m 2 /g.

24 . The nonwoven of claim 13 , wherein the nonwoven has a basis weight of less than or equal to 35 g/m 2 .

25 . The nonwoven of claim 24 , wherein the nonwoven has a basis weight less than or equal to 20 g/m 2 .

26 . The nonwoven of claim 14 , wherein the nonwoven comprises at least one of a property-refining substance, a surface-refining substance, a property-changing substance, a surface-changing substance and processing-facilitating agents at a content of no more than 0.5% by weight.

27 . A face mask comprising the nonwoven claim 1 .

28 . The face mask of claim 27 , wherein the nonwoven is impregnated with a lotion.

29 . The face mask of claim 28 , wherein the lotion is essentially non-water-based.

30 . A dryer sheet comprising the nonwoven claim 1 .

31 . The dryer sheet of claim 30 , wherein the nonwoven is impregnated with a lotion.

32 . The dryer sheet of claim 31 , wherein the lotion is essentially non-water-based.

Assignees

• Chemiefaser Lenzing Ag

Inventors

• Gregorich Katharina
• Einzmann Mirko

Classifications

• D10B2509/026

  Absorbent pads; Tampons; Laundry; Towels · CPC title

• D10B2503/00

  Domestic or personal · CPC title

• D10B2501/04

  Outerwear; Protective garments · CPC title

• D04H3/013 Primary

  Regenerated cellulose series · CPC title

• D01F2/06

  from viscose · CPC title