Title:
BLACK FILM
Document Type and Number:
WIPO Patent Application WO/2017/217429
Kind Code:
A1
Abstract:
[Problem] To provide a black film which does not become see-through even after stretch forming and has an excellent jet-black color with both depth and a sense of freshness.
[Solution] A black film which comprises a thermoplastic resin (A) containing two or more dyes that are not black, wherein the thickness T is 45-550 µm, the total concentration C of the dyes, which are not black, is 0.4-5 mass% with respect to the thermoplastic resin (A), and the total dye concentration C and the thickness T satisfy the following relationship 1. When examined for the L*a*b color system in accordance with JIS Z 8781-4, the black film has a value of L* (lightness) of 10 or less, an absolute value of a* of 2.0 or less, and an absolute value of b* of 2.0 or less. The black film, after having been uniaxially stretched in a stretch ratio of 2 at a temperature higher by 20ºC than the glass transition temperature, has a total light transmittance of 3.0% or less.
C×T≥210 (Relationship 1)
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Inventors:
OZAWA YUSHI (JP)
Application Number:
PCT/JP2017/021868
Publication Date:
December 21, 2017
Filing Date:
June 13, 2017
Export Citation:
Assignee:
KURARAY CO (JP)
International Classes:
B29C55/04; B29C48/00; B29C48/08; B29C48/21; B32B27/20; B32B27/30; C08J5/18; B29C48/37; B29C48/495; B29C48/69
Foreign References:
| JP2005132970A | 2005-05-26 | |||
| JP2000327880A | 2000-11-28 | |||
| JP2013227562A | 2013-11-07 | |||
| JPH01177501A | 1989-07-13 | |||
| JPH1086535A | 1998-04-07 | |||
| JP2010076126A | 2010-04-08 |
Other References:
See also references of EP 3470205A4
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