Biodegradable nonwovens

Abstract

Nonwoven comprising a core layer made of wood fibres, wherein covering layers comprising continuous polylactic acir or polyvinyl alcohol filaments are applied on both sides of the core layer. The nonwoven is biodegradable.

1 . A method for making a biodegradable nonwoven, which comprises water-jet entangling covering layers of continuous filaments with a filament count between 0.5 and 3 decitex of polylactic acid on both sides of a core layer of non-thermally bonded wood fibers with a length of 2 to 7 mm, wherein the covering layers represents less than 50% by weight of the nonwoven.  
     
     
         2 . The method of manufacture of  claim 1  further comprising packaging the nonwoven in a packaging, wherein a preservative is placed in the packaging.  
     
     
         3 . The method of manufacture of  claim 1  further comprising impregnating the nonwoven with an aqueous solution.  
     
     
         4 . The method of manufacture of  claim 1  further comprising bonding the layers in the nonwoven together by calendering.