Nonwoven webs comprising polysaccharides

Patent metadata

Field	Value
Publication number	US-12312722-B2
Application number	US-202318174110-A
Country	US
Kind code	B2
Filing date	Feb 24, 2023
Priority date	Sep 13, 2017
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

Disclosed herein are nonwoven webs comprising a nonwoven substrate and a binder comprising a polysaccharide. In one embodiment, the polysaccharide can comprise poly alpha-1,3-glucan, a poly alpha-1,3-glucan ether compound as disclosed herein, a poly alpha-1,3-glucan ester compound as disclosed herein, a graft copolymer comprising a backbone comprising dextran and poly alpha-1,3-glucan side chains, a crosslinked graft copolymer comprising a backbone comprising dextran and poly alpha-1,3-glucan chains, or a mixture thereof. Also disclosed are articles comprising the nonwoven webs, and methods of making the nonwoven webs.

First claim

What is claimed is:

1. A nonwoven web comprising a nonwoven substrate and polysaccharide fibrids, wherein the polysaccharide fibrids comprise:
(a) poly alpha-1,3-glucan, or
(b) a poly alpha-1,3-glucan ether compound represented by Structure I:

wherein
(i) n is at least 6,
(ii) each R is independently an H or a positively charged organic group, and
(iii) the compound has a degree of substitution of about 0.001 to about 3.0.

2. The nonwoven web of claim 1 , wherein the nonwoven substrate is an airlaid nonwoven substrate, a multi-bonded airlaid nonwoven substrate, a carded nonwoven substrate, a wet laid nonwoven substrate, a spun lace nonwoven substrate, a meltblown nonwoven substrate, or a spun bond nonwoven substrate.

3. The nonwoven web of claim 1 , wherein the nonwoven substrate comprises natural fiber.

4. The nonwoven web of claim 3 , wherein the natural fiber comprises cellulose.

5. The nonwoven web of claim 1 , wherein the nonwoven substrate comprises synthetic fiber.

6. The nonwoven web of claim 5 , wherein the synthetic fiber comprises rayon, polyester, polyamide, or polyolefin.

7. The nonwoven web of claim 1 , wherein the nonwoven substrate comprises bicomponent fiber.

8. The nonwoven web of claim 7 , wherein the bicomponent fiber has a side-by-side or sheath/core orientation, and the bicomponent fiber comprises a polyethylene/polyethylene terephthalate composition or at least one of polyolefin, polytetrafluoroethylene, polyester, polyvinyl acetate, polyvinyl chloride acetate, polyvinyl butyral, acrylic resin, polymethylacrylate, polymethylmethacrylate, polyamide, polyvinyl chloride, polyvinylidene chloride, polystyrene, polyvinyl alcohol, polyurethane, or cellulosic resin.

9. The nonwoven web of claim 1 , further comprising a binder that comprises a polymer polymerized from one or more of acrylic monomers, vinyl monomers, or styrene monomers.

10. The nonwoven web of claim 1 , comprising about 0.5 weight percent to about 50 weight percent of the polysaccharide fibrids.

11. The nonwoven web of claim 1 , wherein the polysaccharide fibrids comprise the poly alpha-1,3-glucan.

12. The nonwoven web of claim 1 , wherein the polysaccharide fibrids comprise the poly alpha-1,3-glucan ether compound.

13. The nonwoven web of claim 12 , wherein the positively charged organic group comprises a trimethylammonium group.

14. The nonwoven web of claim 12 , wherein the positively charged organic group comprises a quaternary ammonium hydroxypropyl group.

15. An article comprising the nonwoven web of claim 1 .

16. The article of claim 15 , wherein the article is an absorbing wipe, paper towel, tissue, or napkin.

17. The article of claim 15 , wherein the article is a laminate or a pouched laminate.

18. The article of claim 15 , wherein the article is a household product, agricultural product, medical product, or industrial product.

19. The article of claim 15 , wherein the article is a personal care product.

20. The article of claim 19 , wherein the personal care product is selected from baby diapers, potty training pants, incontinence products, or feminine hygiene products.

Assignees

• Nutrition & Biosciences Usa 4 Inc

Inventors

• Behabtu Natnael
• Harvey Monica
• Lenges Christian Peter
• Beardsall Ian Robert

Classifications

• D06M15/03 Primary

  Polysaccharides or derivatives thereof · CPC title

• D04H1/64

  the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions · CPC title

• D04H1/4291

  Olefin series · CPC title

• D04H1/425

  Cellulose series · CPC title

• C08L2312/00

  Crosslinking · CPC title