| 摘要 |
<p>PROBLEM TO BE SOLVED: To make the uniformity of coating, the perfectness of coating, adhesion, heat resistance and moldability excellent in a laminate wherein an extrusion coating layer of polyester is provided on a substrate such as a metal or the like and to inexpensively produce the laminate in good yield at a high speed. SOLUTION: A laminate is constituted of a metal substrate and the thermoplastic polyester layer provided on the surface of the substrate. In this case, the thermoplastic polyester layer contains a dicarboxylic acid component based on an aromatic dicarboxylic acid and a glycol component wherein 0.5-20 mol.% total glycol component is a 1,4-cyclohexane dimethanol component and is characterized by that a melt viscosity ratio (R) defined by formula: R=ρ12.2/ρ1216 (whereinρ12.2 andη1216 are melt viscosities at shearing speeds of 12.2 sec-1 and 1216 sec-1 at the extrusion temp. of polyester) at the temp. at melt extrusion is 2.0 or more andρ1216 is 500 poise or more.</p> |
