Patents by Inventor Wayne K. Shih

Wayne K. Shih has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Plasticized polyester for shrink film applications
    Patent number: 5589126
    Abstract: This invention relates to polyester/plasticizer blends which are useful as heat-shrinkable films or sheet in low temperature shrink packaging applications. The plasticizer is injected into the melt of the polyester. The plasticizer lowers the glass transition temperature, on-set temperature and shrink rate of the polyester. Film or sheet produced by the polyester/plasticizer blends is clear.
    Type: Grant
    Filed: March 4, 1996
    Date of Patent: December 31, 1996
    Assignee: Eastman Chemical Company
    Inventors: Wayne K. Shih, Ronald R. Light
  • Non-shrinkable and shrinkable foamed polyester film for the labeling of pet containers
    Patent number: 5567511
    Abstract: A label for containers comprises a foamed polyester film that has a density of less than 1 g/cm.sup.3. The foamed polyester film may be blown away in air and then floated away in water during the recycle process for containers. After separation from the containers the foamed polyester film may be reclaimed by a chemical process to recover raw materials for polyesters.
    Type: Grant
    Filed: March 12, 1996
    Date of Patent: October 22, 1996
    Assignee: Eastman Chemical Company
    Inventors: Wayne K. Shih, Robert J. Turney
  • Plasticized polyesters for shrink film applications
    Patent number: 5534570
    Abstract: This invention relates to polyester/plasticizer blends which are useful as heat-shrinkable films or sheet in low temperature shrink packaging applications. The plasticizer is injected into the melt of the polyester. The plasticizer lowers the glass transition temperature, on-set temperature and shrink rate of the polyester. Film or sheet produced by the polyester/plasticizer blends is clear.
    Type: Grant
    Filed: March 24, 1995
    Date of Patent: July 9, 1996
    Assignee: Eastman Chemical Company
    Inventors: Wayne K. Shih, Ronald R. Light
  • Non-oriented, heat-sealing polyester film
    Patent number: 5484632
    Abstract: Monolayer and multilayer non-oriented polyester films comprising of at least one layer of an amorphous heat-sealing polyester wherein the heat-sealing polyester consisting essentially of terephthalic acid, ethylene glycol, and about 7-15 mol % cyclohexanedimethanol. The heat-sealing polyester has a heat of fusion greater than 0.5 cal/g and is sufficiently crystallizable to allow the drying of mixtures of the heat-sealing polyesters with other crystallizable polyesters without sticking. Multilayered films also contain a layer of an amorphous crystallizable polyethylene terephthalate.
    Type: Grant
    Filed: October 7, 1993
    Date of Patent: January 16, 1996
    Assignee: Eastman Chemical Company
    Inventors: James W. Mercer, Jr., Emily T. Bell, Wayne K. Shih