| 摘要 |
<p>PURPOSE:To obtain a bottle, the transparency and gas barrier properties of which are excellent and the wall thickness distribution of which is favorable, by a method wherein polyester resin preform is heated from its external part and hollow part and, after that, stretch-blow-molded so as to realize the draw index of the specified value or more. CONSTITUTION:Polyester resin preform made of at least one resin, which is selected from the group consisting of copolymer polyester resin produced from dicarboxylic acid constituent unit introduced from polyethylene naphthalate resin, polyethylene terephthalate resin, terephthalic acid and isophthalic acid and dihydoxy compound constituent unit introduced from etylene glycol, copolymer polyester resin produced from dicarboxylic acid constituent unit introduced from terephthalic acid and 2,6-naphthalenedicarboxylic acid and dihydroxy compound constituent unit introduced from ethylene glycol and other copolymer polyester resin, is heated from its external part and hollow part so as to be stretch-blow-molded in order to realize the draw index, which is represented by the formula (I), of 130cm or more.</p> |
