Process for manufacturing a nonwoven sheet material having an impermeable layer on one side and an anti-slip coating on the other side

Abstract

A process for manufacturing a nonwoven sheet material having an impermeable layer on one side and an anti-slip coating on the other side includes carding fibers with a common general orientation and forming a web. The fibers are bonded into a nonwoven sheet material. An anti-slip coating is applied onto one surface of the material. A polymer is applied onto the second surface of the nonwoven material. The orientation of the fibers is maintained during the entier process.

1 . A nonwoven sheet material having a liquid-impermeable polymer layer on one side and an anti-slip coating on the other side, wherein fibers of the nonwoven sheet material are carded bonded fibers having a common general orientation. 
     
     
         2 . The nonwoven sheet material according to  claim 1 , wherein the nonwoven sheet material comprises at least one of the following type of fibers:
 PET fibres,   bico PET/coPET fibers,   bico PET/PP fibers,   bico PET/PE fibers,   bico PP/PE fibers,   PLA fibers,   biodegradable fibers   cellulose fibers, and   viscose fibers.   
     
     
         3 . The nonwoven sheet material according to  claim 1 , wherein the nonwoven sheet material has a weight of 200 g/m 2  or less, preferably 180 g/m 2  or less. 
     
     
         4 . The nonwoven sheet material according to  claim 3 , wherein the nonwoven sheet material comprises at least one of the following type of fibers:
 PET fibres,   bico PET/coPET fibers,   bico PET/PP fibers,   bico PET/PE fibers,   bico PP/PE fibers,   PLA fibers,   biodegradable fibers   cellulose fibers, and   viscose fibers.   
     
     
         5 . The nonwoven sheet material according to  claim 3 , wherein the nonwoven sheet material has a weight of 180 g/m 2  or less. 
     
     
         6 . The nonwoven sheet material according to  claim 5 , wherein the nonwoven sheet material comprises at least one of the following type of fibers:
 PET fibres,   bico PET/coPET fibers,   bico PET/PP fibers,   bico PET/PE fibers,   bico PP/PE fibers,   PLA fibers,   biodegradable fibers   cellulose fibers, and   viscose fibers.   
     
     
         7 . The nonwoven sheet material according to  claim 1 , wherein the liquid-impermeable layer has a thickness in the range of 10 to 60 μm. 
     
     
         8 . The nonwoven sheet material according to  claim 7 , wherein the nonwoven sheet material comprises at least one of the following type of fibers:
 PET fibres,   bico PET/coPET fibers,   bico PET/PP fibers,   bico PET/PE fibers,   bico PP/PE fibers,   PLA fibers,   biodegradable fibers   cellulose fibers, and   viscose fibers.   
     
     
         9 . The nonwoven sheet material according to  claim 1 , further comprising, on top of the impermeable layer, one or more additional nonwoven sheet material and/or one or more additional polymer layers.