Title:
HIGH-STRENGTH ELECTROSTATIC SPINNING POLYURETHANE WATERPROOF MOISTURE-PERMEABLE FILM, AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2024/098440
Kind Code:
A1
Abstract:
A high-strength electrostatic spinning polyurethane waterproof moisture-permeable film, and a preparation method therefor. A waterproof agent is dispersed in a prepared mixed solvent of DMF and methyl acetate; TPU particles are then dispersed in the solution until a transparent spinning solution is formed; and the spinning solution is subjected to electrostatic spinning. The solvent makes the TPU mass fraction reach 20%, such that the spinning yield is greatly improved compared with a traditional DMF system. The spinning solution forms a large Taylor cone during the spinning process, which facilitates the volatilization of the solvent, and the prepared thin film can resist a water pressure up to 8,000-12,000 mm. The solvent has the characteristic of a high solubility, is suitable for most DMF-soluble polymers, can be used for increasing the yield of other electrostatic spinning polymer thin films, and solves the problems of a low yield and many holes in industrial electrostatic spinning TPU thin films.
More Like This:
Inventors:
LAI HAORAN (CN)
Application Number:
PCT/CN2022/131665
Publication Date:
May 16, 2024
Filing Date:
November 14, 2022
Export Citation:
Assignee:
YANGTZE DELTA REGION INSTITUTE OF UNIV OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA HUZHOU (CN)
International Classes:
D04H1/728; D01F1/10; D04H1/4358
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
Download PDF:
Previous Patent: HEATING COMB
Next Patent: ULTRA-HIGH-SPEED PLANAR LASER CLADDING ADDITIVE FABRICATION APPARATUS AND PROCESSING METHOD
Next Patent: ULTRA-HIGH-SPEED PLANAR LASER CLADDING ADDITIVE FABRICATION APPARATUS AND PROCESSING METHOD