Title:
LAMINATED POLYESTER FILM
Document Type and Number:
WIPO Patent Application WO/2016/136615
Kind Code:
A1
Abstract:
[Problem] A polyester film which, when laminated to a metal sheet to obtain a laminated metal sheet, improves base material concealing properties and scratch resistance during deep drawing, and when used as a light-shielding tape, improves yield and workability. [Solution] A laminated film having a polyester B1 layer and a polyester B2 layer, both containing wax, on both surfaces of a polyester A layer containing a pigment, characterized in that formula (I) and formula (II) are satisfied, and in B1 layer and B2 layer, the variation coefficient in the contact angle with water is from 0% to 10%, when the contact angle with water is measured 10 times at arbitrarily defined positions within the range of 200mm x 200mm. (I) Wb1 > Wa, (II) Wb2 > Wa (where Wb1 and Wb2 are, respectively, the wax content per unit area of the B1 layer and the B2 layer, and Wa indicates the wax content per unit area of the A layer. The variation coefficient is the value obtained by dividing the standard deviation in values measured 10 times, by the average.
Inventors:
SAKAMOTO MITSUTAKA (JP)
NAKAMURA MAYUMI (JP)
MANABE ISAO (JP)
TAKADA YASUSHI (JP)
NAKAMURA SATOSHI (JP)
NAKAMURA MAYUMI (JP)
MANABE ISAO (JP)
TAKADA YASUSHI (JP)
NAKAMURA SATOSHI (JP)
Application Number:
PCT/JP2016/054862
Publication Date:
September 01, 2016
Filing Date:
February 19, 2016
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B32B27/36; B29C48/21; B32B7/027; C08K5/10; C08L67/00
Domestic Patent References:
| WO2007094441A1 | 2007-08-23 |
Foreign References:
| JP2002302560A | 2002-10-18 | |||
| JP2002187963A | 2002-07-05 | |||
| JP2015077783A | 2015-04-23 |
Other References:
See also references of EP 3263335A4
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