Title:
WHITE POLYESTER FILM
Document Type and Number:
WIPO Patent Application WO/2019/220918
Kind Code:
A1
Abstract:
The present invention addresses the problem of achieving high reflectance and high concealability without increasing the thickness of a reflective film; and the present invention provides a white polyester film which comprises at least a layer that is mainly composed of a polyester resin (A), a thermoplastic resin (B) that is incompatible with the polyester resin (A), and inorganic particles (C), and which is configured such that the layer has a void that comprises the thermoplastic resin (B) as a nucleus. If NB1 is the number of nuclei of the thermoplastic resin (B) in a vertical cross-section of the film, the ratio of NB2, which is the number of those nuclei that internally contain the inorganic particles (C), to NB1, namely NB2/NB1 × 100 (%) is 15% or more.
Inventors:
UCHIDA HIROHITO (JP)
ISOZAKI TAKASHI (JP)
ABE YU (JP)
FUNATOMI TAKASHI (JP)
ISOZAKI TAKASHI (JP)
ABE YU (JP)
FUNATOMI TAKASHI (JP)
Application Number:
PCT/JP2019/017684
Publication Date:
November 21, 2019
Filing Date:
April 25, 2019
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
C08J9/00; B32B27/36; C08K3/22; C08L67/02; C08L101/00
Domestic Patent References:
| WO2011105295A1 | 2011-09-01 |
Foreign References:
| JPH06322153A | 1994-11-22 | |||
| JPH07118433A | 1995-05-09 | |||
| JPH0680798A | 1994-03-22 | |||
| JP2018072496A | 2018-05-10 | |||
| JP2016147980A | 2016-08-18 | |||
| JP2012135952A | 2012-07-19 | |||
| JPH02147641A | 1990-06-06 |
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