Title:
METHOD FOR PRODUCING POLYAMIDE RESIN FILM
Document Type and Number:
WIPO Patent Application WO/2021/149815
Kind Code:
A1
Abstract:
[Problem] To provide a method for producing a polyamide resin film by using a polyamide resin obtained through polymerization of a regenerated monomer used as a recycled material. [Solution] This method for producing a polyamide resin film is characterized by comprising: (1) a step for generating a monomer from a depolymerization material (A); (2) a step for producing a polyamide resin (B) through polymerization using a material containing said monomer; (3) a step for refining the polyamide resin (B); and (4) a step for preparing an unstretched film by using a starting material containing the refined polyamide resin (B), and then stretching the unstretched film.
Inventors:
KUROSAWA AKIKO (JP)
NODA ATSUKO (JP)
NODA ATSUKO (JP)
Application Number:
PCT/JP2021/002310
Publication Date:
July 29, 2021
Filing Date:
January 22, 2021
Export Citation:
Assignee:
UNITIKA LTD (JP)
International Classes:
B29C55/12; C08G69/04; C08J5/18; B29K77/00; B29L7/00
Foreign References:
| JP2018095863A | 2018-06-21 | |||
| CN107163572A | 2017-09-15 | |||
| JP2001058366A | 2001-03-06 | |||
| JP2018070786A | 2018-05-10 | |||
| JP2016184477A | 2016-10-20 | |||
| JPH05194377A | 1993-08-03 | |||
| JPH10298162A | 1998-11-10 | |||
| JPH10287645A | 1998-10-27 | |||
| JPH07330718A | 1995-12-19 | |||
| CN91106147A | 1991-06-19 |
Attorney, Agent or Firm:
FUJII, Atsushi (JP)
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