Paperboard-based Material

Abstract

The invention relates to a paperboard-based material used particularly for producing dishes, such as cups, bowls, plates or the like, the material comprising a core layer which is liquid proof at least for a short period of time and is formed of at least one paperboard layer and at least one other material layer. According to the invention, the material also comprises a dry-formed material layer attached to one surface of the core layer.

1 . A paperboard-based material used particularly for producing dishes, such as cups, bowls, plates or the like, the material comprising 
 a core layer which is liquid proof at least for a short period of time and is formed of at least one paperboard layer and at least one other material layer; and    a dry-formed material layer attached to one surface of the core layer.    
     
     
         2 . A material according to  claim 1 , wherein said at least one other material layer is a layer of synthetic polymer and/or biopolymer.  
     
     
         3 . A material according to  claim 1 , wherein the dry-formed material layer is a layer containing at least 50% of cellulose fibre and bound with a binder.  
     
     
         4 . Material according to  claim 1 , wherein the dry-formed material layer contains, at least in the surface layer to be attached to the core layer, adhesive latex used for attaching the dry-formed material layer and the core layer to each other.  
     
     
         5 . A material according to  claim 1 , wherein the dry-formed material layer and the core layer are attached to each other by extrusion lamination.  
     
     
         6 . A material according to  claim 1 , wherein the dry-formed material layer and the core layer are attached to each other by dispersion lamination.