Cured in place liner having integral inner impermeable layer

Abstract

A resin impregnated cured in place liner with an integral inner impermeable layer is provided. The liner is formed from a resin impregnable material having an impermeable layer bonded to one surface. The material is formed into tubular shape with the impermeable layer on the outside of the tube about a tubular forming member and continuously everted into the tubular forming device to place the impermeable layer on the inside. An outer impermeable film is placed about the inner tubular layer and may be impregnated with vacuum in the usual manner. Alternatively, the tubular resin impregnable material may be passed through a resin tank and impregnated with a curable resin prior to being wrapped with an outer impermeable layer. The impregnated liner is then suitable for pull-n-and-inflate which can be by steam in view of the integral inner impermeable layer of the liner.

1 . A continuous length of a cured in place liner having at least one layer of resin impregnable material and an impermeable layer bonded thereto, comprising a liner formed by 
 providing a length of a resin impregnable material having an impermeable layer bonded to one surface and formed into a tube about a support frame with the impermeable layer on the outside;    the longitudinal edges of the length of material joined together about the support frame and sealed to form a tubular member that is everted through the support frame so that the outer layer of the liner is the resin impregnable material.    
     
     
         2 . The liner of  claim 1 , including at least one additional layer of resin impregnable material about the layer of resin impregnable material.  
     
     
         3 . The liner of  claim 1 , wherein the tubular member is impregnated with resin.  
     
     
         4 . The liner of  claim 1 , wherein the length of resin impregnable material is formed into tubular members by stitching the longitudinal edges.  
     
     
         5 . The liner of  claim 1 , wherein the tubular member is sealed by applying a tape of impermeable material over the longitudinal edges.  
     
     
         6 . The liner of  claim 3 , further including a layer of impermeable material sealed about the impregnated tubular member.  
     
     
         7 . The liner of  claim 1 , wherein the tubular member is impregnated with resin.  
     
     
         8 . The liner of  claim 7 , further including a layer of impermeable material sealed about the impregnated tubular member.  
     
     
         9 . A continuous length of a cured in place liner having at least one layer of resin impregnable material and an impermeable layer bonded thereto, comprising a liner formed by 
 providing a length of a resin impregnable material having an impermeable layer bonded to one surface and formed into a tube about a tubular support with the impermeable layer on he outside;    the longitudinal edges of the length of material joined together about the tubular support and sealed to Form a tubular member that is everted through the tubular support so that the outer layer of the liner is the resin impregnable material, and the tubular member is impregnated with resin and a layer of impermeable material sealed about the impregnated tubular member.