Abstract: The present invention relates to a large molded polyester container weighing greater than about 200, and preferably between about 200 and about 800 grams. Specifically, the present invention relates to polyester containers having a volume of several gallons. In one embodiment the container is a bottle formed from a diacid component comprising up to about 96.5 mol % terephthalic acid or naphthalene dicarboxylic acid and a glycol component, wherein said polyester possesses an IV of about 0.75 to about 0.85.

Abstract: The present invention discloses a process comprising forming a preform with planar stretch ratios greater than about 14 from a polyester having a natural stretch ratio which is substantially matched to the preform planar stretch ratio at processing conditions; and stretch blow molding said preform to produce a container. Suitable natural stretch ratios include those greater than about 13 at 210.degree. F. The desired natural stretch ratios and desirable final container properties are achieved by balancing the appropriate I.V. and copolymer modification.

Abstract: The present invention comprises polyester blend compositions having improved flavor retaining properties and color, comprising:(A) 98.0 to 99.95 weight percent of a polyester which comprises(1) a dicarboxylic acid component comprising repeat units from at least 85 mole percent terephthalic acid or naphthalenedicarboxylic acid derived from terephthalic acid or naphthalenedicarboxylic acid respectively; and(2) a diol component comprising repeat units from at least 85 mole percent ethylene glycol, based on 100 mole percent dicarboxylic acid and 100 mole percent diol; and(B) 2.0 to 0.05 weight percent of a polyamide; wherein the combined weights of (A) and (B) total 100 percent.