Artificial polypeptide fiber and method for producing the same
US9617315B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2012 |
| Grant date | Apr 11, 2017 |
| Priority date | — |
| Expiry date | Oct 3, 2033 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F6/68
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An artificial polypeptide fiber of the present invention is an artificial fiber containing a polypeptide as a main component, and has a stress of 350 MPa or more and a toughness of 138 MJ/m3 or more. A method for producing an artificial polypeptide fiber of the present invention is a method for producing the artificial polypeptide fiber obtained by spinning a spinning solution (6) containing a polypeptide derived from natural spider silk proteins and performing drawing of at least two stages. The drawing of at least two stages includes a first-stage drawing (3) in wet heat and a second-stage drawing (4) in dry heat. Thereby, the present invention provides high-toughness artificial polypeptide fibers having favorable stress and rupture elongation, and a method for producing the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.