公开(公告)号：US20190300588A1

公开(公告)日：2019-10-03

申请号：US16371932

申请日：2019-04-01

Applicant: SPIBER INC.

Inventor： Kaori SEKIYAMA ,  Mizuki ISHIKAWA ,  Shinya MURATA

IPC: C07K14/435 ,  B29C55/02 ,  C08L89/00 ,  B29C71/02 ,  C08J5/18 ,  B29C39/02

Abstract: A film of the present invention contains a polypeptide derived from spider silk proteins. The decomposition temperature of the film is 240 to 260° C. The film absorbs ultraviolet light having a wavelength of 200 to 300 nm and has a light transmittance of 85% or more at a wavelength of 400 to 780 nm. The film is transparent and colorless in a visible light region. A method for producing a film of the present invention includes: dissolving a polypeptide derived from spider silk proteins in a dimethyl sulfoxide solvent to prepare a dope; and cast-molding the dope on a surface of a base. Thus, the present invention provides a spider silk protein film that can be formed easily and has favorable stretchability, and a method for producing the same.