Polysaccharide fibers and method for producing same

Patent metadata

Field	Value
Publication number	US-10876226-B2
Application number	US-201815988401-A
Country	US
Kind code	B2
Filing date	May 24, 2018
Priority date	Jun 17, 2013
Publication date	Dec 29, 2020
Grant date	Dec 29, 2020

Abstract

The present invention relates to a method for the production of polysaccharide fibers which contain a mixture of cellulose and α(1→3)-glucan as a fiber-forming substance, as well as to the fibers made thereby, and to their use.

First claim

What is claimed is:

1. A method of producing a polysaccharide fiber comprising cellulose and α(1→3)-glucan, said method comprising:
(i) preparing an alkaline cellulose xanthogenate composition;
(ii) combining the alkaline cellulose xanthogenate composition with a composition comprising α(1→3)-glucan to provide a spinning solution that comprises a fiber-forming substance, wherein substantially all of the glycosidic bonds of the α(1→3)-glucan are α(1→3)-glycosidic bonds, and wherein the fiber-forming substance comprises 5% to 45% by weight the α(1→3)-glucan; and
(iii) extruding the spinning solution to produce the polysaccharide fiber.

2. The method of claim 1 , wherein the polysaccharide fiber is a modal fiber.

3. The method of claim 1 , wherein the polysaccharide fiber is a staple fiber or a continuous filament.

4. A polysaccharide fiber produced according to the method of claim 1 .

5. The polysaccharide fiber of claim 4 , wherein the polysaccharide fiber is a staple fiber or a continuous filament.

6. A textile product comprising the polysaccharide fiber of claim 4 , wherein the textile product is selected from the group consisting of yarns, woven fabrics, and knitted fabrics.

7. A product comprising the polysaccharide fiber of claim 4 , wherein the product is a nonwoven, hygiene article, or paper.

8. The textile product of claim 6 , wherein the polysaccharide fiber is a staple fiber or a continuous filament.

9. The product of claim 7 , wherein the product is said hygiene article, wherein the hygiene article is selected from the group consisting of tampons, panty liners, and diapers.

10. The product of claim 7 , wherein the polysaccharide fiber is a staple fiber or a continuous filament.

11. The method of claim 1 , further comprising (iv) stretching the polysaccharide fiber.

12. The method of claim 1 , wherein the weight-average degree of polymerization (DPw) of the α(1→3)-glucan is between 200 and 2000.

13. The method of claim 12 , wherein the DPw of the α(1→3)-glucan is between 500 and 1000.

Assignees

• Dupont Ind Biosciences Usa Llc

Inventors

• Röder Thomas
• Kaindl Gernot
• Redlinger Sigrid
• Firgo Heinrich
• Kroner Gert

Classifications

• A61L15/28

  Polysaccharides or their derivatives {(A61L15/225 takes precedence)} · CPC title

• D01D5/06

  Wet spinning methods {(D01D5/0046 takes precedence)} · CPC title

• D04H3/013

  Regenerated cellulose series · CPC title

• D01F9/00 Primary

  Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments · CPC title

• C08L1/02

  Cellulose; Modified cellulose · CPC title