Peel and stick waterproofing material

Abstract

Disclosed is waterproofing sheeting that uses a polyester layer that provides high lateral stability and puncture resistance. The waterproof sheeting can be used in many applications including waterproof roof underlayments, waterproof sheeting for foundations, underlayment for tile and flooring and various other applications. The waterproof sheeting can be manufactured without many of the problems associated with the granular coatings of existing waterproof sheeting that create excessive wear and environmental hazards.

What is claimed is: 
     
         1 . A method of making a self-adhesive protective sheet comprising:
 providing a polyester sheet that is constructed from polyethylene terephthalate (PET) fibers that are bonded together to form a non-woven, liquid permeable PET protective sheet;   placing liquid asphalt on said non-woven, liquid permeable PET sheet that is partially absorbed by said non-woven, liquid permeable PET sheet;   allowing said liquid asphalt to cool to form an asphalt layer that is bonded, on a first side of said asphalt layer, to said non-woven, liquid permeable PET sheet as a result of absorption of a portion of said liquid asphalt by said non-woven, liquid permeable PET sheet on said first side of said asphalt layer;   placing a release film on a tacky second surface of said asphalt layer that can be peeled from said second tacky surface so that said second tacky surface can be applied to a surface to be protected.   
     
     
         2 . The method of  claim 1  wherein the process of providing a polyester sheet comprises:
 providing a polyester sheet that is formed from a first sheet of PET fibers that are thermally bonded together and a second sheet of PET fibers that are thermally bonded together, said first sheet and said second sheet thermally bonded together to form said polyester sheet. 
 
     
     
         3 . The method of  claim 2  further comprising:
 mixing a polymer with said liquid asphalt so that said asphalt layer remains tacky after cooing to a solid state. 
 
     
     
         4 . The method of  claim 3  further comprising:
 placing a waterproof film on an exposed portion of said first side of said asphalt layer that provides a waterproof seal between said asphalt layer and an adjacent self-adhesive protective sheet that is disposed over said exposed portion of said first side of said asphalt layer. 
 
     
     
         5 . A method of making a self-adhesive protective sheet comprising:
 providing a first polyester sheet that is constructed from polyester fibers that are thermally bonded together to form a non-woven, liquid permeable layer of said self-adhesive protective sheet;   providing a second polyester sheet that is constructed from polyester fibers that are thermally bonded together to form a non-woven, liquid permeable layer of said self-adhesive protective sheet;   thermally bonding said first polyester sheet and said second polyester sheet to provide a polyester layer that is liquid permeable;   placing asphalt on a fiberglass mesh that is partially absorbed by said fiberglass mesh;   allowing said asphalt to cool to form a first asphalt layer that is bonded, on a second side of said first asphalt layer, to said fiberglass mesh as a result of absorption of a portion of said asphalt by said fiberglass mesh on said second side of said first asphalt layer;   placing additional asphalt on said fiberglass mesh to form a second asphalt layer having a first side that is bonded to said fiberglass mesh and a second side having a tacky surface;   placing said polyester layer on a first side of said first asphalt layer, so that said first side of said first asphalt layer is partially absorbed by said polyester layer to from a bond between said polyester layer and said first asphalt layer;   placing a release film on said tacky surface of said second side of said second asphalt layer.   
     
     
         6 . The method of  claim 5  wherein the process of providing said first polyester sheet and said second polyester sheet comprises:
 providing said first polyester sheet and said second polyester sheet from fibers of polyethylene terephthalate. 
 
     
     
         7 . The method of  claim 6  further comprising:
 mixing a polymer with said asphalt so that said first asphalt layer and said second asphalt layer remain tacky after cooling to a solid state. 
 
     
     
         8 . The method of  claim 7  further comprising:
 placing a waterproof film on an exposed portion of said first side of said first asphalt layer that provides a waterproof seal between said first asphalt layer and an adjacent self-adhesive protected sheet that is disposed over said exposed portion of said first side of said first asphalt layer.