Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Adhesive outermost layer
Reexamination Certificate
2005-06-07
2005-06-07
Chen, Vivian (Department: 1773)
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Adhesive outermost layer
C428S480000, C428S343000, C428S346000, C428S347000, C428S3550RA, C528S308000, C528S308100, C528S308600, C528S308700, C525S437000, C525S444000, C156S308200, C156S325000, C156S327000, C156S332000, C156S244110, C156S244230, C156S244240, C264S173160
Reexamination Certificate
active
06902802
ABSTRACT:
The present invention provides a heat-sealable polyester composition having an amorphous processing window ranging from a Tg in the range of about 40° C. to about 70° C., to a Tcg in the range of about 70° C. to about 150° C. The composition preferably contains a mixture of poly(ethylene terephthalate) homopolymer or copolymer and poly(trimethylene terephthalate) homopolymer or copolymer, either as a physical blend or as a copolyester oligomer or polymer prepared from the respective monomers. The resulting composition is heat-sealable at low temperatures, retains barrier properties and is non-flavor-scalping.
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W. Oppermann, et al., Properties and morphology of polyester blends and of fibers made therefrom, Chemical Fibers International, Mar. 1999, 33-35, 49.
Hahm Diane M.
Kurian Joseph V.
Smillie Benjamin A.
Chen Vivian
E. I. du Pont de Nemours and Company
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