公开(公告)号：US10857753B2

公开(公告)日：2020-12-08

申请号：US15889250

申请日：2018-02-06

申请人： STORA ENSO OYJ

发明人： Tapani Penttinen ,  Kimmo Nevalainen ,  Jurkka Kuusipalo ,  Tapio Koskinen ,  Sami Kotkamo

IPC分类号： A61F13/15 ,  B05D3/00 ,  B29C53/00 ,  B29C65/00 ,  B31C11/04 ,  B31C7/00 ,  B32B37/00 ,  B32B27/00 ,  B65C9/25 ,  C08J5/00 ,  C08J7/18 ,  G21H5/00 ,  B31B50/64 ,  B29C65/02 ,  B29C71/04 ,  B32B9/02 ,  B32B27/12 ,  C08J5/12 ,  C08J7/12 ,  C09J5/06 ,  B32B7/12 ,  B32B27/08 ,  B32B27/10 ,  B32B27/36 ,  B31B50/74 ,  B29C65/10 ,  B29C65/18 ,  B29C35/08 ,  B29K67/00

摘要： 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.