Title:
BIAXIALLY DRAWN COLORED POLYESTER FILM FOR LAMINATING METAL SHEET
Document Type and Number:
WIPO Patent Application WO/2017/022526
Kind Code:
A1
Abstract:
[Problem] To provide a biaxially drawn colored polyester film for lamination-forming a metal sheet that: exhibits exceptional form-processing performance that allows the film to be kept from being cracked or scraped when formed into cans, etc., even when subjected to severe processing or high-temperature heat treatments; and yields formed articles such as cans that have exceptional concealing properties, outward appearance, and imprintability. The invention is arrived at using a biaxially drawn colored polyester film for lamination-forming a metal sheet. Said film comprises at least two layers: a surface layer (layer A) that chiefly comprises a polyester having a melting point TmA of 230‒260˚C, the color pigment content not exceeding 10% by weight, the intrinsic viscosity of the polymer component being no less than 0.46, and the angle of contact with water relative to the external surface being 70‒120˚; and a substrate layer (layer B) that chiefly comprises a color pigment and a polyester that has a melting point TmB of 230‒260˚C, the intrinsic viscosity of the polymer component being no less than 0.46, and the color pigment content being more than 10% by weight but not exceeding 50% by weight. |TmB‒TmA| is no greater than 4˚C.
Inventors:
SATO TAKATOSHI (JP)
OKADA SHINICHIRO (JP)
OKADA SHINICHIRO (JP)
Application Number:
PCT/JP2016/071573
Publication Date:
February 09, 2017
Filing Date:
July 22, 2016
Export Citation:
Assignee:
TEIJIN FILM SOLUTIONS LTD (JP)
International Classes:
B32B27/36; B32B7/027; B32B27/20
Foreign References:
| JP2004130536A | 2004-04-30 | |||
| JP2014008739A | 2014-01-20 | |||
| JP2010126701A | 2010-06-10 | |||
| JP2004203905A | 2004-07-22 | |||
| JPH11254624A | 1999-09-21 |
Attorney, Agent or Firm:
TAMEYAMA, Taro (JP)
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