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Patent Searching and Data


Title:
COMPOSITE SHEET MANUFACTURING METHOD AND COMPOSITE SHEET
Document Type and Number:
WIPO Patent Application WO/2021/181491
Kind Code:
A1
Abstract:
This composite sheet manufacturing method includes: a spinning solution preparation step in which a spinning solution is prepared by adding a cross-linking agent to a mixture of a polyurethane dispersion and an aqueous solution of a water-soluble polymer; a spinning step in which a nanofiber non-woven fabric is formed from the spinning solution; a cross-linking step in which nanofibers that form the nanofiber non-woven fabric are made into poorly soluble nanofibers by cross-linking; and a particulate substance section forming step in which a particulate substance section 20 is formed by placing a particulate substance 22 in the nanofiber non-woven fabric 10. According to this composite sheet manufacturing method, a composite sheet 1 that is poorly soluble in water and organic solvents (e.g., N,N-dimethylformamide) can be manufactured from a polyurethane dispersion.

Inventors:
WATANABE KEI (JP)
OHSAWA OSAMU (JP)
Application Number:
PCT/JP2020/010131
Publication Date:
September 16, 2021
Filing Date:
March 09, 2020
Export Citation:
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Assignee:
NAFIAS INC (JP)
International Classes:
B32B5/24; B32B5/30; D04H1/4358; D04H1/728; D06M23/08
Foreign References:
JP2010248665A2010-11-04
JP2010084252A2010-04-15
JP2009190269A2009-08-27
JP2019200960A2019-11-21
Attorney, Agent or Firm:
MEBUKI IP LAW FIRM et al. (JP)
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