Method for improving the heat sealability of packaging material and method for manufacturing heat-sealed container or package

Tapani Penttinen (Inventor), Kimmo Nevalainen (Inventor), Jurkka Kuusipalo (Inventor), Tapio Koskinen (Inventor), Sami Kotkamo (Inventor)

    Research output: Patent

    Abstract

    A method for improving the heat sealability of a packaging material and a method for manufacturing a heat-sealed container or package are described. The material can be polymer-coated packaging paper or cardboard, or a polymeric packaging film. The material includes a polymer layer that contains polyester, particularly polylactide, the heat sealability of which is improved by ultraviolet radiation. Polylactide is useful as such or when blended, for example, with other biodegradable polyester. The containers and packages thus manufactured include disposable drinking cups and cardboard carton and box packages.

    Original languageEnglish
    Patent numberUS2018154603
    IPCB29K 67/ 00 A N
    Priority date6/02/18
    Publication statusPublished - 7 Jun 2018
    Publication typeH1 Granted patent

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