Title:
MULTILAYER FILM AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2022/107752
Kind Code:
A1
Abstract:
A multilayer film which is obtained by superposing a resin layer on at least one surface of a base material film, and which is characterized in that: the base material film is a semiaromatic polyamide film that is at least uniaxially stretched; the resin layer contains fine particles; the thermal shrinkage ratio SMD of the multilayer film in the longitudinal direction and the thermal shrinkage ratio STD of the multilayer film in the transverse direction are from -1.0% to 1.5% as determined under the conditions of 250°C and 5 minutes; the tensile elongations at break in the longitudinal direction and in the transverse direction are 70% or more; and the haze is 3% or less.
Inventors:
OKABE TAKASHI (JP)
OKUMURA NOBUYASU (JP)
ASHIHARA KUMI (JP)
OKUMURA NOBUYASU (JP)
ASHIHARA KUMI (JP)
Application Number:
PCT/JP2021/042041
Publication Date:
May 27, 2022
Filing Date:
November 16, 2021
Export Citation:
Assignee:
UNITIKA LTD (JP)
International Classes:
B29C55/04; B32B7/02; B32B27/18; B32B27/34; B32B37/02
Domestic Patent References:
| WO2020171115A1 | 2020-08-27 | |||
| WO2012067172A1 | 2012-05-24 | |||
| WO2018052104A1 | 2018-03-22 | |||
| WO2020230806A1 | 2020-11-19 | |||
| WO2020171115A1 | 2020-08-27 |
Foreign References:
| JP2015105321A | 2015-06-08 | |||
| JP2013189495A | 2013-09-26 | |||
| JP2018135414A | 2018-08-30 | |||
| JP2015151446A | 2015-08-24 |
Attorney, Agent or Firm:
MORIMOTO INT'L PATENT OFFICE (JP)
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