| 摘要 |
<p>Disclosed is a welded can having at least the inner face side of a weld seam covered with a composite film of a thermoplastic resin, wherein the thermoplastic resin composite film comprises (I) an innermost layer, located on the inner face side of the can, of a thermoplastic polyester having a molecularly oriented crystal and comprising a dibasic acid component content of at least 90 mole % of terephthalic acid and a diol component containing at least 90 mole % of ethylene glycol, said innermost layer (I) overlayer (II) a seam-contacting layer, located on the seam side, of a thermoplastic copolyester containing in the chain molecule a dibasic acid component containing 40 to 95 mole % of terephthalic acid and 0 to 40 mole % of isophthalic acid and a diol component containing ethylene glycol and butane diol in a total amount of 65 to 100 mole % at a molar ratio of from 5/95 and 80/20 or a blend of such copolyesters, and the composite film comprising the layers (I) and (II) has an elasticity modulus of 5 to 220 kg/mm2 at a temperature lower by 20 DEG C. than the softening temperature of the resin of the layer (II).</p> |
