Bedliner with anti-slip under layer

Abstract

A truck cargo bed liner having an anti-slip under layer to reduce rubbing between the liner and the cargo bed. The liner may further include an upper layer of anti-slip material to resist shifting of cargo during transport.

1 . A truck cargo bed liner of unitary vacuum formed plastic having a base sheet with an under side for engagement with a truck cargo bed, comprising: 
 a liner bottom;    two liner wheel well covers formed at opposite sides of the liner bottom;    a liner front wall connected to and extending upwardly from the liner bottom wall;    two liner side walls connected to the liner bottom wall and wheel wells and the liner front wall at opposite sides thereof, each liner side wall projecting upwardly from the liner bottom wall and adjacent a wheel well cover; and    an under layer having an effectively high coefficient of friction joined to the under side of the base sheet forming the liner.    
     
     
         2 . The truck liner of  claim 1 , and further comprising: 
 an upper layer having an effectively high coefficient of friction joined to an upper surface of the base sheet forming the liner.    
     
     
         3 . The liner of  claim 1 , wherein the under layer was coextruded with the base sheet forming the liner prior to vacuum forming the liner.  
     
     
         4 . The liner of  claim 1 , wherein the under layer was laminated to the base sheet forming the liner by extrusion forming of the base sheet prior to vacuum forming the liner.  
     
     
         5 . The liner of  claim 1 , wherein the under layer was joined to the base sheet forming the liner by an adhesive applied prior to vacuum forming the liner.  
     
     
         6 . The liner of  claim 1 , wherein the under layer was joined to the base sheet forming the liner by a thermal attachment process prior to vacuum forming the liner.  
     
     
         7 . The liner of  claim 1 , wherein the under layer was joined to the base sheet forming the liner by spraying under layer material on the liner base sheet prior to forming the liner.  
     
     
         8 . The liner of  claim 1 , wherein the under layer is joined to only a portion of the underside of the liner base sheet.  
     
     
         9 . The liner of  claim 1 , wherein the under layer is joined to substantially all of the underside of the liner base sheet.  
     
     
         10 . The liner of  claim 1 , wherein the under layer has a thickness of not less than about ten thousandths of an inch.  
     
     
         11 . The liner of  claim 1 , wherein the under layer is a composition including very low density polyethylene and high molecular weight high density polyethylene.  
     
     
         12 . The liner of  claim 1 , wherein the under layer is a composition including about sixty percent very low density polyethylene and about forty percent high molecular weight high density polyethylene.  
     
     
         13 . The liner of  claim 1 , wherein the under layer is a composition including polyolefin.  
     
     
         14 . The liner of  claim 1 , wherein the under layer is a composition including polyolefin selected from the group consisting of: 
 polyethylene;    polypropylene;    polybutylene; and    polybutadiene.    
     
     
         15 . The liner of  claim 1 , wherein the under layer is a composition selected from the group consisting of: 
 isocyanates;    carbamates; and    ureas; and    polymers and co-polymers thereof.    
     
     
         16 . The liner of  claim 1 , wherein the under layer is a composition including about sixty percent very low density polyethylene and about forty percent polyolefin.  
     
     
         17 . The liner of  claim 1 , wherein the under layer is a composition including polyolefin in a range of about  30  to  50  percent polyolefin.  
     
     
         18 . The liner of  claim 2 , wherein the upper layer was coextruded with the base sheet and the under layer.  
     
     
         19 . The liner of  claim 2 , wherein the upper layer has a thickness of not less than about forty thousandths of an inch.  
     
     
         20 . The liner of  claim 2 , wherein the upper layer is a composition including very low density polyethylene and high molecular weight high density polyethylene.  
     
     
         21 . The liner of  claim 2 , wherein the upper layer is a composition including about sixty percent very low density polyethylene and forty percent high molecular weight high density polyethylene.  
     
     
         22 . The liner of  claim 2 , wherein the upper layer is a composition including polyolefin.  
     
     
         23 . The liner of  claim 2 , wherein the upper layer is a composition including about sixty percent very low density polyethylene and about forty percent polyolefin.  
     
     
         24 . The liner of  claim 2 , wherein the upper layer is a composition including polyolefin in a range of about 30 to 50 percent polyolefin.  
     
     
         25 . The liner of  claim 1 , wherein the liner base sheet includes a high molecular weight high density polyethylene.