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

Research output: PatentScientific


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


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.