Continuous filament cellulose nonwoven made with multiple bonding techniques

Patent metadata

Field	Value
Publication number	US-11613097-B2
Application number	US-201716500336-A
Country	US
Kind code	B2
Filing date	Apr 3, 2017
Priority date	Apr 3, 2017
Publication date	Mar 28, 2023
Grant date	Mar 28, 2023

Abstract

This invention relates to a nonwoven material consisting of one or more layers of nonwoven webs of essentially continuous cellulosic filaments, characterized in that within each layer each of the three bonding mechanisms: a) hydrogen bonding, b) filament intermingling and c) merged filament bonding occur for bonding the essentially continuous cellulosic filaments. Further it relates to a process for the manufacture and to various uses of this material.

First claim

What is claimed is:

1. A nonwoven material comprising one or more layers of nonwoven webs of continuous cellulosic filaments wherein within each layer three bonding mechanisms occur: a) hydrogen bonding, b) filament intermingling and c) merged filament bonding, for bonding the continuous cellulosic filaments,
wherein, during manufacture, when contact of the continuous cellulosic filaments with a coagulation spray decreases by a factor of from about 2.0 times to about 0.2 times, (i) tensile strength increases by a factor of from about 0.7 times to about 1.8 times and/or (ii) stiffness increases by a factor of from about 0.5 times to about 2.5 times.

2. The nonwoven material according to claim 1 , wherein the number of layers is at least two.

3. The nonwoven material according to claim 1 , wherein the one or more layers are bonded together using at least one of merged filament bonding, hydrogen bonding or filament intermingling.

4. The nonwoven material according to claim 1 , wherein the nonwoven material is hydroentangled, spunlaced, needled, needlepunched, bonded by adhesive, or bonded by other chemical bonding techniques, or combinations thereof.

5. The nonwoven material according to claim 1 , wherein the nonwoven is subjected to one or more after-treatments.

6. The nonwoven material according to claim 1 , wherein at least one of the one or more layers comprises lyocell filaments.

7. A wet cleaning wipe comprising the nonwoven material according to claim 1 and further comprising at least one additive.

8. A dry cleaning wipe comprising the nonwoven material according to claim 1 wherein the wipe can be used for household, institutional and industrial cleaning, polishing or surface preparation applications.

9. A dry cleaning wipe comprising the nonwoven material according claim 1 wherein said wipe is capable of at least one of water or oil absorption.

10. A cleaning wipe comprising the nonwoven material according to claim 1 coated with a dry lotion formulation.

11. An air filtration media comprising the nonwoven material according to claim 1 .

12. A liquid filtration media comprising the nonwoven material according to claim 1 .

13. A dryer sheet comprising the nonwoven material according to claim 1 , wherein the nonwoven material is impregnated by at least one of an antistat, quaternary softeners or waxes.

14. A wound care absorbent layer comprising the nonwoven material according to claim 1 .

15. The wound care absorbent layer of claim 14 , wherein the nonwoven material is post-treated with at least one of an antibacterial chemical or other pharmaceutical active ingredient.

16. A moisture management layer comprising the nonwoven material according to claim 1 , wherein the moisture management layer is incorporated in at least one product, wherein the product comprises disposable baby diapers, reusable baby diapers, feminine hygiene pads or adult incontinence products.

17. A carbonized web comprising the nonwoven material according to claim 1 .

18. A dye catcher sheet comprising the nonwoven material according claim 1 , wherein the dye catcher sheet is impregnated with at least one of the following agents: known chemical and polymeric dye transfer inhibitors, dye absorbers and scavengers, bleaching and oxidative agents or other chemicals.

19. A beauty face mask sheet comprising the nonwoven material according claim 1 , wherein the beauty face mask sheet is impregnated with at least one of skin care and beauty lotions or liquids.

20. The beauty face mask sheet of claim 19 , wherein the beauty face mask sheet is packaged dry and liquid-activated just prior to use by a post-treatment of at least one of a cosmetic ingredient, or water.

21. The nonwoven material according to claim 1 , wherein the nonwoven material comprises two to ten layers of nonwoven webs.

22. The nonwoven material according to claim 5 , wherein the one or more after-treatments comprise at least one of a chemical treatment or a plasma process.

23. The nonwoven material according to claim 22 , wherein the nonwoven material comprises two to six layers of nonwoven webs.

24. The wet cleaning wipe according to claim 7 , wherein the additive is a cleansing agent, a sterilizing agent, a deodorizing agent, a disinfectant, a moisturizing agent, a cosmetic remover or water.

Assignees

• Chemiefaser Lenzing Ag

Inventors

• Carlyle Tom
• Einzmann Mirko
• Goldhalm Gisela
• Hayhurst Malcolm John
• Mayer Katharina
• Sagerer-Foric Ibrahim

Classifications

• B32B2432/00

  Cleaning articles, e.g. mops or wipes · CPC title

• D04H1/56

  in association with fibre formation, e.g. immediately following extrusion of staple fibres · CPC title

• B32B7/02

  Physical, chemical or physicochemical properties · CPC title

• D04H3/11

  by fluid jet · CPC title

• B32B2307/748

  Releasability · CPC title