Films and laminates for use in packaging reactive compounds
AssigneeDanapak Flexibles A/S
InventorsPeter Johansen, Lars Christensen, Torben Fogtmann
Life of this patent
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Abstract
The present present disclosure relates to a laminate film including a water resistant or oxygen resistant base layer, and co-extrusion layer. The coextrusion layer may include a tie layer and a contact layer, and the contact layer may include a polymer such as cyclic olefin copolymer, a polyamide, or an ethylene vinyl alcohol. A total loading of the tie layer may be in the range of 3-9 g/m2 and wherein a loading of the contact layer is: loadingcontact=x*loadingtie, wherein loadingcontact is the loading of the contact layer, loadingtie is the total loading of the tie layer, and x is in the range of 0.8 to 3.
Claims20
A laminate film comprising:
- a base layer, wherein the base layer is one or more of water or oxygen resistant;
- and
- a co-extrusion layer, the co-extrusion layer comprising a tie layer and a contact layer, wherein the contact layer comprises a polymer selected from the group consisting of a cyclic olefin copolymer, a polyamide, an ethylene vinyl alcohol, or a combination thereof;
- wherein a total loading of the tie layer is in the range of 3-9 g/m2 and wherein a loading of the contact layer is:
- loadingcontact=x*loadingtie, wherein loadingcontact is the loading of the contact layer, loadingtie is the total loading of the tie layer, and x is in the range of 0.8 to 3.
A packaging for packing a composition said packaging comprising:
- a first outer layer made of a mechanically wear resistant material;
- a laminate film comprising a base layer and a co-extrusion layer;
- wherein the base layer is one or more of water resistant or oxygen resistant;
- wherein the co-extrusion layer comprise a tie layer and a contact layer, a total loading of the tie layer is in the range of 3-9 g/m2, and a loading of the contact layer is loadingcontact=x*loadingtie, where loadingcontact is the loading of the contact layer, loadingtie is the total loading of the tie layer, and x is in the range of 0.8 to 3;
- wherein the base layer side of the film is facing the first outer layer.
A method for providing a laminate film, said method comprising the steps of:
- providing a base layer, wherein the base layer is one or more of:
- water resistant or oxygen resistant;
- coextruding a layer comprising a tie layer and a contact layer to provide a co-extrusion layer,
- coating the co-extrusion layer to the base layer;
- and
- curing the co-extrusion layer coated to the base layer to provide the laminate film,
- wherein the contact layer comprises a polymer selected from the group consisting of a cyclic olefin copolymer, a polyamide, an ethylene vinyl alcohol, or a combination thereof;
- and
- wherein the total loading of the tie layer is 3 to 9 g/m2 and wherein the loading of the contact layer is:
- loadingcontact=x*loadingtie, wherein loadingcontact is the loading of the contact layer, loadingtie is the total loading of the tie layer, and where x is in the range of 0.8 to 3.
Dependencies are inferred from the claim text.