Preform and bottle using pet/pen blends and copolymers

Details Preform and bottle using pet/pen blends and copolymers Preform and bottle using pet/pen blends and copolymers

1996-07-23

1999-03-30

Dye, Rena

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

428 3692, 428220, 428339, 428480, 4285428, 428910, 264513, 264532, B29C 4900, B65D 100

Patent

active

058885986

ABSTRACT:
The present invention relates to an injection molded preform comprising an open ended mouth forming portion, an intermediate body forming portion, and a closed base forming portion, wherein said preform comprises (1) a blend of (i) PEN copolymer and (ii) PET homopolymer or PET copolymer, such that when said PET and PEN components are physically mixed into a blend, said blend has about 5-70 wt %. PEN copolymer and 30 to 95 wt % PET homopolymer of copolymer therein, (2) a PEN copolymer, or (3) PEN homopolymer, and said preform having a stretch ratio in the range of 18:1 to 25:1 in order form a bottle having a volume in the range of 250 ml to 850 ml, wherein the stretch index is below 130 cm. Alternatively, said preform has a stretch ratio in the range of 18:1 to 20:1 in order to form a bottle having a volume in the range of 250 ml to 1000 ml. The invention further relates to an injection mold defining a cavity corresponding to an injection molded preform of the invention. In addition, the invention relates to a blow-molded container produced from the injection molded plastic preform described above.

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