C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 5/18 (2006.01) B32B 15/08 (2006.01) B32B 27/36 (2006.01)
Patent
CA 2199334
A biaxially oriented polyester film is suitable for laminating onto a metallic sheet so as to provide a laminate capable of being formed into a can. The polyester film comprises at least one of: (1) a polyester having a melting point of 246 to 280 °C and being such that when the laminate is formed into a can, then at a neck of the can the film provides an inner 1 to 3 µm portion (a) close to the metallic sheet and an outer 1 ~ 3 µm portion (b) remote from the metallic sheet, which said portions (a) and (b) have respective average orientation intensity ratios, as measured by Raman spectrometry, of 6 or less and 8 or more; and (2) a polyester layer (A) of a polyester having at least 93 mol% thereof of units derived from ethylene terephthalate and/or ethylene naphthalate and a polyester layer (B) of a polyester containing an ionomer and which film has a face orientation factor of 0.10 to 0.15.
Abe Koichi
Kimura Masahiro
Shimizu Yuzo
Suzuki Masaru
Takahashi Kohzo
Smart & Biggar
Toray Industries Inc.
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