| 摘要 |
<p>The novel polyester (first polyester ÄAÜ) of the invention comprises dicarboxylic acid constituent units derived from at least one dicarboxylic acid selected from terephthalic acid, isophthalic acid and naphthalenedicarboxylic acid and diol constituent units derived from diols comprising ethylene glycol and a polyalkylene glycol having a C2 - C10 alkylene chain, wherein the proportion of constituent units derived from the polyalkylene glycol is 0.001 to 10 % by weight based on the diol constituent units. The polyester ÄAÜ has an excellent crystallization rate, is suitably used, singly or as compositions together with another polyester ÄBÜ and/or other polymers, for production of molded products such as films, sheets, laminates, preforms and bottles, which have excellent gas barrier properties, transparency and heat resistance. The polyester composition of the invention comprises 1 to 99 % by weight of the first polyester ÄAÜ and 1 to 99 % by weight of another polyester ÄBÜ, a polyamide and/or a polyolefin. The polyester laminate of the invention has a multi-layer structure comprising a first resin layer of the first polyester ÄAÜ or the compostion and a second resin layer of another polyester ÄBÜ, a polyamide and/or a polyolefin. The process for producing biaxially stretched bottle comprises the steps of producing a preform from the first polyester ÄAÜ, the composition or the polyester laminate, heating it, subjecting it to biaxial stretch blow molding to give a stretched bottle and holding the bottle in a mold at a temperature of not lower than 100 DEG C.</p> |
