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    Heat-sealable biodegradable packaging material, a method for its manufacture, and a product package made from the material
    2.
    发明专利
    Heat-sealable biodegradable packaging material, a method for its manufacture, and a product package made from the material 未知

    公开(公告)号：AU2011225959B2

    公开(公告)日：2015-12-03

    申请号：AU2011225959

    申请日：2011-03-11

    Applicant: STORA ENSO OYJ

    Inventor： PENTTINEN TAPANI ,  NEVALAINEN KIMMO ,  KUUSIPALO JURKKA ,  KOSKINEN TAPIO ,  KOTKAMO SAMI

    IPC: B65D65/46 ,  B32B27/12 ,  B32B27/36 ,  C08L67/04 ,  C09D167/04

    Abstract: The invention relates to a heat-sealable biodegradable packaging material, its manufacturing method and a product package formed thereof. The packaging material comprises a fibre substrate (1 ), an inner polymeric coating layer (2) against the same, which contains polylactide and a biodegradable polyester that is blended therewith to improve the adhesion between the layer and the fibre substrate, and an outer coating layer (3) that constitutes the outer surface of the material and contains polylactide and a biodegradable polyester that is blended therewith to improve the heat sealing ability of the layer, the portion of polylactide in the inner layer (2) being higher than that in the outer layer (3). The inner and/or outer coating layers (2, 3) can further have blended therewith a small amount of acrylic copolymer that improves the adhesion and/or heat sealing ability. The coating layers can be introduced onto the fibre substrate by extrusion or coextrusion.

    3.
    发明专利
    未知

    公开(公告)号：FI20105471A

    公开(公告)日：2011-10-31

    申请号：FI20105471

    申请日：2010-04-30

    Applicant: STORA ENSO OYJ

    Inventor： PENTTINEN TAPANI ,  NEVALAINEN KIMMO ,  KUUSIPALO JURKKA ,  KOSKINEN TAPIO ,  KOTKAMO SAMI

    IPC: C08J3/28 ,  B29C65/02 ,  B29C71/04

    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.

    HEAT-SEALABLE BIODEGRADABLE PACKAGING MATERIAL, A METHOD FOR ITS MANUFACTURE, AND A PRODUCT PACKAGE MADE FROM THE MATERIAL
    7.
    发明专利
    HEAT-SEALABLE BIODEGRADABLE PACKAGING MATERIAL, A METHOD FOR ITS MANUFACTURE, AND A PRODUCT PACKAGE MADE FROM THE MATERIAL 未知

    公开(公告)号：CA2792395A1

    公开(公告)日：2011-09-15

    申请号：CA2792395

    申请日：2011-03-11

    Applicant: STORA ENSO OYJ

    Inventor： PENTTINEN TAPANI ,  NEVALAINEN KIMMO ,  KUUSIPALO JURKKA ,  KOSKINEN TAPIO ,  KOTKAMO SAMI

    IPC: B65D65/46 ,  B32B27/12 ,  B32B27/36 ,  C08L67/04 ,  C09D167/04

    Abstract: The invention relates to a heat-sealable biodegradable packaging material, its manufacturing method and a product package formed thereof. The packaging material comprises a fibre substrate (1 ), an inner polymeric coating layer (2) against the same, which contains polylactide and a biodegradable polyester that is blended therewith to improve the adhesion between the layer and the fibre substrate, and an outer coating layer (3) that constitutes the outer surface of the material and contains polylactide and a biodegradable polyester that is blended therewith to improve the heat sealing ability of the layer, the portion of polylactide in the inner layer (2) being higher than that in the outer layer (3). The inner and/or outer coating layers (2, 3) can further have blended therewith a small amount of acrylic copolymer that improves the adhesion and/or heat sealing ability. The coating layers can be introduced onto the fibre substrate by extrusion or coextrusion.

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