Wound roll core covering

Abstract

A winding core covering ( 10 ) comprising a backing ( 45 ), the backing ( 45 ) having an adhesive layer ( 40 ) and a support layer ( 30 ) in contact with the adhesive layer ( 40 ), and a web contact layer ( 20 ) in contact with the backing ( 45 ), the web contact layer ( 20 ) including a thermoplastic polymer, where the outer surface ( 27 ) of the web contact layer ( 20 ) has a structured surface comprising a plurality of protrusions ( 25 ) having an average height (H) of 50 μm to 600 μm. A winding core ( 41 ) including the disclosed winding core covering ( 10 ).

What is claimed is: 
     
         1 . A winding core covering comprising:
 a backing, the backing comprising:
 an adhesive layer, wherein the adhesive layer has a first major surface and a second major surface; and 
 a support layer, wherein the support layer has a first major surface and a second major surface, wherein the first major surface of the support layer is in contact with the second major surface of the adhesive layer; and 
   a web contact layer, the web contact layer comprising:
 a thermoplastic polymer, wherein the web contact layer has a first major surface and a second major surface, 
   wherein the second major surface of the support layer is in contact with the first major surface of the web contact layer at an interface, wherein the second major surface of the web contact layer has a structured surface comprising a plurality of protrusions, and wherein the protrusions have an average height (“H”) of 50 μm to 600 μm.   
     
     
         2 . The winding core covering of  claim 1 , wherein the backing has a thickness of 50 μm to 380 μm. 
     
     
         3 . The winding core covering of  claim 1 , wherein the adhesive layer comprises a double-sided adhesive tape. 
     
     
         4 . The winding core covering of  claim 1 , wherein the support layer comprises low density polyethylene. 
     
     
         5 . The winding core covering of  claim 1 , wherein thermoplastic polymer comprises a triblock copolymer. 
     
     
         6 . The winding core covering of  claim 1 , wherein the web contact layer further comprises a tackifier. 
     
     
         7 . The winding core covering of  claim 1 , wherein the interface is not planar. 
     
     
         8 . The winding core covering of  claim 1 , wherein the protrusions have an average diameter of 25 μm to 760 μm. 
     
     
         9 . The winding core covering of  claim 1 , wherein the structured surface includes protrusions at a density of 15 protrusions/cm 2  to 620 protrusions/cm 2 , desirably 45 protrusions/cm 2  to 400 protrusions/cm 2 , preferably 90 protrusions/cm 2  to 350 protrusions/cm 2 , or more preferably 100 protrusions/cm 2  to 320 protrusions/cm 2 . 
     
     
         10 . The winding core covering of  claim 1 , wherein the protrusions have a hemispherical shape. 
     
     
         11 . A winding core comprising:
 a cylindrical tube having an outer surface and a longitudinal axis; and   a winding core covering adjacent the outer surface of the cylindrical tube, the winding core covering comprising the winding core covering of  claim 1 .   
     
     
         12 . The winding core of  claim 11 , wherein the cylindrical tube comprises cardboard.