Methods for lowering melt viscosity and improving heat-sealability of polyester and for manufacturing heat-sealed container or package

NEVALAINEN K.内瓦莱宁 (Inventor), RIBU V.里布 (Inventor), RASANEN J.拉萨宁 (Inventor), Outi O.凯尔利艾宁 (Inventor), ROSLING A.罗斯林 (Inventor), MOHAMMAD M.卡耶海安 (Inventor), Jurkka Tapani J.库西帕洛 (Inventor), Sami Juhani S.科特卡莫 (Inventor), Mikko M.图米宁 (Inventor)

    Research output: Patent

    Abstract

    The invention relates to methods for lowering the melt viscosity and thereby improving heat-sealability of a polyester. The invention also relates to a method for manufacturing a heat-sealed container or package from fibrous- based, polyester-coated packaging material, and a method for heat-sealing polyester. The solution according to the invention is subjecting polyester to electron beam (EB) radiation. The lowered melt viscosity allows a lower heat-sealing temperature, and permits sealing of polyester to an uncoated fibrous surface. The preferred polyester for the invention is polylactide, as such or as blended with another polyester.

    Original languageEnglish
    Patent numberCN105934471
    IPCB65D 65/ 38 A I
    Priority date22/01/15
    Publication statusPublished - 7 Sept 2016
    Publication typeH1 Granted patent

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