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Title:
LASER COLOR-DEVELOPING MULTILAYER FILM, PLASTIC CARD-USE LAYERED BODY PROVIDED WITH MULTILAYER FILM, ELECTRONIC PASSPORT-USE LAYERED BODY, PASSPORT OR SUCH PROVIDED WITH MULTILAYER FILM, AND METHOD USING MULTILAYER FILM AS PASSPORT OR SUCH
Document Type and Number:
WIPO Patent Application WO/2021/020269
Kind Code:
A1
Abstract:
Provided is a laser color-developing multilayer film having a novel constitution by which there is a high contrast between a printed portion and other portions in comparison to the prior art, said laser color-developing multilayer film having at least two layers comprising a layer (A) and a coloring layer (B), wherein the layer (A) contains a non-crystalline aromatic polyester-based resin and an oxidation inhibitor, the oxidation inhibitor content is 0.05 to 4 parts by mass relative to 100 parts by mass of the non-crystalline aromatic polyester-based resin, the coloring layer (B) contains a polycarbonate resin and a laser color-developing agent, the laser color-developing agent is a metal oxide, and the oxidation inhibitor content in the coloring layer (B) is less than 0.05 parts by mass relative to 100 parts by mass of the polycarbonate resin.

Inventors:
HATTA MASAHIRO (JP)
Application Number:
PCT/JP2020/028407
Publication Date:
February 04, 2021
Filing Date:
July 22, 2020
Export Citation:
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Assignee:
MITSUBISHI CHEM CORP (JP)
International Classes:
B32B27/36; B41M5/333; B41M5/52; B42D25/24
Domestic Patent References:
WO2018074480A12018-04-26
Foreign References:
JP2013240885A2013-12-05
JP2004243685A2004-09-02
JP2019025754A2019-02-21
JP2015083623A2015-04-30
Attorney, Agent or Firm:
YAMAMOTO, Noriaki et al. (JP)
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