Foamed surface covering sheet with self adhesive layer

Abstract

A protective covering sheet, having a foamed scrim-supported polyvinyl chloride (PVC) working surface, is thermally laminated to the obverse face of a PVC base sheet. The foamed PVC may be discontinuous, having a series of open apertures through the thickness of the material, or a continuous layer. The PVC base sheet contains any migrant plasticizer, suspended in the foamed PVC layer, preventing exposure and damage to underlying surfaces. A pressure sensitive adhesive layer is applied to the reverse face of the base sheet, being a repositionable or permanent adhesive selected from acrylic and rubber based adhesives, including acrylic microspheres and microencapsulated adhesives. A removable silicon coated release liner is utilized to protect the adhesive layer; permitting subsequent adhesion of the covering to a selected surface or object, including a decorative upper layer such as cloth.

1 . A covering sheet for protecting an underlying surface, said sheet having a polyvinyl chloride (PVC) base sheet, and having a woven scrim supported foamed PVC plastisol adhered thereto, wherein said base sheet serves as a barrier to plasticizer residues present in the foamed plastisol, to limit subsequent migration of suspended plasticizer from coming into contact with said underlying surface, and an adhesive layer secured to the reverse face of said base sheet, in isolated relation from said plasticizer residues.  
     
     
         2 . The covering sheet as set forth in  claim 1 , wherein said base sheet has a reverse side thereof coated with an adhesive layer selected from an adhesive group consisting of removable and permanent acrylic, and rubber based repositionable, pressure sensitive adhesives.  
     
     
         3 . The covering sheet as set forth in  claim 2 , wherein said adhesive layer is selected from the group consisting of continuously coated and adhesive microspheres and microencapsulated adhesives.  
     
     
         4 . The covering sheet as set forth in  claim 2 , wherein a siliconized release sheet, in adhering relation with said adhesive layer, sandwiches said adhesive layer between the release sheet and said base sheet.  
     
     
         5 . The covering sheet as set forth in  claim 1 , wherein the woven scrim supported foamed layer is of a foamed polyvinyl chloride (PVC) compound.  
     
     
         6 . The covering sheet as set forth in  claim 1 , wherein the woven scrim supported foamed PVC layer is discontinuous, with a series of apertures through the thickness of said layer.  
     
     
         7 . The covering sheet as set forth in  claim 1 , wherein the scrim supported foamed PVC layer is a continuous layer.  
     
     
         8 . The covering sheet as set forth in  claim 1 , wherein the scrim supported foamed PVC layer is thermally fused to the PVC backing sheet.  
     
     
         9 . The covering sheet as set forth in  claim 1 , wherein the scrim supported foamed PVC layer is laminated to the PVC backing sheet utilizing an adhesive selected from the group consisting of acrylic and rubber based plasticizer resistant adherents.  
     
     
         10 . The covering sheet as set forth in  claim 1 , wherein said scrim supported foamed plastisol has a decorated outer working surface remote from said base sheet.  
     
     
         11 . The covering sheet as set forth in  claim 1 , wherein said scrim supported foamed PVC plastisol has open apertures, said base sheet having a decorated obverse surface that is visible through said open apertures.  
     
     
         12 . The method of fabricating a covering sheet, including the steps of thermally laminating a PVC base sheet to a scrim supported PVC foamed sheet; applying a layer of adhesive as a coating to a release sheet, and applying the adhesive layer of the release sheet to the reverse side of the thermally fused PVC backing sheet.  
     
     
         13 . The method as set forth in  claim 12 , including removing said release sheet, to expose said layer of adhesive, and adhering a further layer to said adhesive, in adhering, covering relation therewith.  
     
     
         14 . The method as set forth in  claim 12 , wherein said further layer is a decorative layer.  
     
     
         15 . The method as set forth in  claim 13 , wherein said decorative layer is fabric.  
     
     
         16 . The method as set forth in  claim 12 , wherein said fabric has a printed pattern thereon.