초록 ▼

A method of forming a multi-layer polyester preform and container, particularly suitable for refillable PET carbonated beverage bottles, having an interior layer of high copolymer polyester material which resists hazing in the preform injection stage, and at least one exterior layer of a polyester t

A method of forming a multi-layer polyester preform and container, particularly suitable for refillable PET carbonated beverage bottles, having an interior layer of high copolymer polyester material which resists hazing in the preform injection stage, and at least one exterior layer of a polyester to achieve enhanced strain-induced crystallization in the exterior layer during blow molding. The container can withstand higher caustic wash temperatures and exhibits reduced flavor carryover from one product to another.

대표청구항 ▼

[ What is claimed is:] [1.] A container comprising a body having a substantially transparent biaxially-oriented multi-layer integral sidewall including an interior layer of a first copolymer polyester and at least one exterior layer of a second polyester, the second polyester having relatively less

[ What is claimed is:] [1.] A container comprising a body having a substantially transparent biaxially-oriented multi-layer integral sidewall including an interior layer of a first copolymer polyester and at least one exterior layer of a second polyester, the second polyester having relatively less copolymer than the first polyester and a rate of crystallization at least 20% higher than the first polyester, the sidewall including a substantially cylindrical panel having an average strain-induced crystallinity of at least about 20% in the exterior layer and at least about 14% in the interior layer.