Laminate and production method thereof
AssigneeBorealis Polymers Oy
InventorsErkki Laiho, Markku Sainio
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Abstract
The invention concerns laminates incorporating plastic layers and cellulose fiber layers and a method for the production thereof. The plastic layers and the cellulose fiber layers incorporated in the laminates can be separated intact from each other in aqueous defibering by virtue of a water-soluble polymer layer placed adjacent to the fibrous layer whereby all components of the laminate become recyclable for reuse. The laminates can be produced using extrusion coating/laminating methods. The laminates according to the invention are suited to use as, e.g., wrapper and packaging materials.
Claims19
A recyclable laminate, comprising:
- (A) at least one first layer made from cellulose fibers;
- (B) at least one second layer spaced apart from said first layer, wherein said second layer is made from a substantially non-water-soluble polymer material;
- and
- (C) at least one third layer between said first and said second layers which directly bonds to said first layer and bonds said first and second layers to each other, wherein said third layer comprises a polymer which is water-soluble at neutral Ph conditions and exhibits a decomposition temperature of at least 160.degree. C.
Dependencies are inferred from the claim text.