Patents Assigned to E.I. du Pont de Numours and Company
  • Patent number: 6663977
    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.
    Type: Grant
    Filed: March 5, 2001
    Date of Patent: December 16, 2003
    Assignee: E.I. du Pont de Numours and Company
    Inventors: Joseph V. Kurian, Diane M. Hahm, Benjamin A. Smillie