Protein spun yarn manufacturing method

Patent metadata

Field	Value
Publication number	US-12163259-B2
Application number	US-201917279083-A
Country	US
Kind code	B2
Filing date	Sep 27, 2019
Priority date	Sep 28, 2018
Publication date	Dec 10, 2024
Grant date	Dec 10, 2024

Abstract

An object of the present invention is to provide a method for producing protein spinning capable of securing a stable strength by securing sufficient interlacing between fibers. The method for producing a protein spun yarn of the present invention includes a step (a) of preparing a raw material spun yarn including an uncrimped artificial fibroin fiber containing modified fibroin and a step (b) of bringing the raw material spun yarn into contact with an aqueous medium to crimp the artificial fibroin fiber.

First claim

The invention claimed is:

1. A method for producing a protein spun yarn, the method comprising
a step (a) of preparing a raw material spun yarn including an uncrimped artificial fibroin fiber containing modified fibroin; and
a step (b) of bringing the raw material spun yarn into contact with an aqueous medium to crimp the artificial fibroin fiber, wherein the aqueous medium comprises a liquid or a gas which is at a temperature from 40° C. to 230° C.

2. The method for producing a protein spun yarn according to claim 1 , wherein a dry shrinkage rate of the artificial fibroin fiber, which is defined by the following equation, is higher than 7%:
dry shrinkage rate={1−(length of artificial fibroin fiber brought into dry state after contact with aqueous medium/length of artificial fibroin fiber before contact with aqueous medium)}×100(%).

3. The method for producing a protein spun yarn according to claim 1 , wherein a wet shrinkage rate of the artificial fibroin fiber, which is defined by the following equation, is 2% or higher:
wet shrinkage rate={1−(length of artificial fibroin fiber brought into wet state by contact with aqueous medium/length of artificial fibroin fiber after spinning and before contact with aqueous medium)}×100(%).

4. The method for producing a protein spun yarn according to claim 1 , wherein
the modified fibroin comprises modified spider silk fibroin, and
the artificial fibroin fiber comprises an artificial spider silk fibroin fiber.

5. The method for producing a protein spun yarn according to claim 1 , wherein the aqueous medium comprises the liquid or the gas which is at a temperature from 40° C. to 120° C.

6. The method for producing a protein spun yarn according to claim 1 , wherein the step (b) further comprises drying after the raw material spun yarn is brought into contact with the aqueous medium.

7. The method for producing a protein spun yarn according to claim 1 , wherein the aqueous medium comprises a volatile solvent.

8. The method for producing a protein spun yarn according to claim 7 , wherein the volatile solvent comprises ethanol.

9. The method for producing a protein spun yarn according to claim 7 , wherein the volatile solvent comprises methanol.

10. The method for producing a protein spun yarn according to claim 1 , wherein the aqueous medium comprises the liquid.

11. The method for producing a protein spun yarn according to claim 10 , wherein the aqueous medium comprises an oil dispersed in the aqueous medium.

12. The method for producing a protein spun yarn according to claim 1 , wherein the aqueous medium comprises the gas.

13. The method for producing a protein spun yarn according to claim 1 , wherein the aqueous medium comprises the liquid which is at a temperature from 40° C. to 60° C.

14. The method for producing a protein spun yarn according to claim 1 , wherein a duration of the bringing the raw material spun yarn into contact with the aqueous medium is 30 seconds or longer and 10 minutes or shorter.

15. The method for producing a protein spun yarn according to claim 1 , wherein step (b) further comprises applying an amount of tensile force to the raw material spun yarn.

16. The method for producing a protein spun yarn according to claim 6 , wherein the drying comprises natural drying, hot wind drying or hot roller drying.

17. The method for producing a protein spun yarn according to claim 6 , wherein the drying comprises drying at a temperature from 40° C. to 120° C.

18. The method for producing a protein spun yarn according to claim 6 , wherein the drying comprises drying at a temperature from 60° C. to 100° C.

19. The method for producing a protein spun yarn according to claim 2 , wherein the dry shrinkage rate of the artificial fibroin fiber is 37% or higher.

20. A method for producing a protein spun yarn, the method comprising
preparing a raw material spun yarn that is spun from uncrimped artificial fibroin fibers containing modified fibroin; and
bringing the raw material spun yarn into contact with an aqueous medium to crimp the artificial fibroin fiber, wherein the aqueous medium comprises a liquid or a gas which is at a temperature from 40° C. to 230° C.

Assignees

• Shima Seiki Mfg
• Spiber Inc

Inventors

• Torigoe Shozo
• Ozeki Akihiko

Classifications

• D10B2401/063

  high strength · CPC title

• D10B2211/22

  Fibroin · CPC title

• D06M2101/12

  Keratin fibres or silk · CPC title

• D06M11/05

  with water, e.g. steam; with heavy water · CPC title

• D02G1/00

  Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics (yarns per se D02G3/00; during formation of artificial filaments, threads, or the like D01D5/22; general aspects of chemical treatment D06M) · CPC title