Highly absorbent polysaccharide fiber and use thereof

Patent metadata

Field	Value
Publication number	US-10220111-B2
Application number	US-201414899214-A
Country	US
Kind code	B2
Filing date	Jun 13, 2014
Priority date	Jun 17, 2013
Publication date	Mar 5, 2019
Grant date	Mar 5, 2019

Abstract

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

First claim

What is claimed is:

1. A method for the production of a highly absorbent polysaccharide fiber by a xanthogenate process comprising the steps of:
(a) preparing an xanthogenate comprising alkali cellulose;
(b) preparing a solution comprising α(1→3)-glucan and NaOH;
(c) combining the xanthogenate of step (a) with the solution of step (b) to form a spinning solution, wherein a fiber forming substance in said spinning solution is a mixture of cellulose and α(1→3)-glucan; and
(d) extruding said spinning solution to form said polysaccharide fiber.

2. The method according to claim 1 , wherein the fiber-forming substance contains between 1 and 99% by weight of α(1→3)-glucan.

3. The method according to claim 2 , wherein the fiber forming substance contains between 5 and 45% by weight of α(1→3)-glucan.

4. The method according to claim 1 , wherein the method is a viscose process.

5. The method according to claim 1 , wherein at least 90% of the α(1→3)-glucan are hexose units and at least 50% of the hexose units are linked via α(1→3)-glycosidic bonds.

6. The method according to claims 1 , 2 , 4 , or 5 , wherein the fiber is selected from the group consisting of a staple fiber and a continuous filament.

7. A highly absorbent polysaccharide fiber produced according to claim 1 , wherein a fiber-forming substance of the polysaccharide fiber is a mixture of cellulose and α(1→3)-glucan.

8. A highly absorbent polysaccharide fiber comprising a fiber-forming substance, wherein the fiber forming substance is a mixture of cellulose and α(1→3)-glucan.

9. The fiber according to claim 8 , wherein the fiber-forming substance contains between 1 and 99% by weight of α(1→3)-glucan.

10. The fiber according to claim 8 , wherein at least 90% of the α(1→3)-glucan are hexose units and at least 50% of the hexose units are linked via α(1→3)-glucosidic bonds.

11. The fiber according to claim 8 , wherein the fiber has a water retention capacity of at least 90%.

12. The fiber according to claim 7 , wherein the fiber-forming substance contains between 1 and 99% by weight of α(1→3)-glucan.

13. The fiber according to claims 12 or 9 , wherein the fiber forming substance contains between 5 and 45% by weight of α(1→3)-glucan.

14. The fiber according to claim 7 , wherein at least 90% of the α(1→3)-glucan are hexose units and at least 50% of the hexose units are linked via α(1→3)-glycosidic bonds.

15. The fiber according to claim 7 , wherein the fiber has a water retention capacity of at least 90%.

16. The fiber according to claims 15 or 11 , wherein the water retention capacity is greater than 100%.

17. The fiber according to claims 7 , 12 , 14 , 9 , or 8 , wherein the fiber is selected from the group consisting of a staple fiber and a continuous filament.

18. A product comprising the fiber according to claims 7 or 8 , wherein the product is selected from the group consisting of nonwovens, hygiene articles, and of other, absorbent nonwoven products and papers.

19. The product according to claim 18 , wherein the hygiene products are selected from the group consisting of tampons, panty liners, and diapers.

20. A textile product comprising the fiber according to claims 7 or 8 , wherein the textile product is selected from the group consisting of yarns, woven fabrics, and knitted fabrics.

Assignees

• Chemiefaser Lenzing Ag

Inventors

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

Classifications

• C08B37/0009 Primary

  alpha-D-Glucans, e.g. polydextrose, alternan, glycogen; (alpha-1,4)(alpha-1,6)-D-Glucans; (alpha-1,3)(alpha-1,4)-D-Glucans, e.g. isolichenan or nigeran; (alpha-1,4)-D-Glucans; (alpha-1,3)-D-Glucans, e.g. pseudonigeran; Derivatives thereof · CPC title

• B01J20/24

  Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives · CPC title

• C08L5/00

  Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00 · CPC title

• D04H1/4258

  Regenerated cellulose series · CPC title

• C08L1/02

  Cellulose; Modified cellulose · CPC title