| 摘要 |
PROBLEM TO BE SOLVED: To provide a vertically uniaxially oriented film for metal can which is composed of a specific resin composition suitable for a throttle can, a shear spun can or the like, is excellent in adhesion property, a laminate aptitude and film roll appearance and eliminates the need of a heat setting in a film formation process, to provide its manufacturing method, and to provide a resin-laminated metal sheet for metal can which is coated with the resin and is excellent in can-manufacturing performance. SOLUTION: The vertically uniaxially oriented film comprises a polyester resin composition comprising: 50 to 70 wt.% of polyester (a) having terephthalic acid as a dicarboxylic acid component and 1, 4-butanediol as a glycol component; and 50 to 30 wt.% of polyester (b) having terephthalic acid as the dicarboxylic acid component and ethylene glycol as the glycol component. In the vertically uniaxially oriented film for the metal can, (1) refractive index difference in a film surface (difference between a refractive index in a longitudinal direction and a refractive index in a lateral direction)ΔN is≥60×10<SP>-3</SP>, (2) crystallization fraction is≤50% and (3) heating shrinkage ratio in a condition of 150°C for 30 minutes is≤25% in a longitudinal direction (a MD direction) of the film and≤8% in a lateral direction (a TD direction). COPYRIGHT: (C)2010,JPO&INPIT |
