发明名称 Preparation of cured in place liner with integral inner impermeable layer
摘要 A resin impregnated cured in place liner with an integral inner impermeable layer, a method for its manufacture and an apparatus to do this are 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-in-and-inflate which can be by steam in view of the integral inner impermeable layer of the liner.
申请公布号 US7261788(B1) 申请公布日期 2007.08.28
申请号 US20030703814 申请日期 2003.11.07
申请人 INSITAFORM (NETHERLANDS) B.V. 发明人 DRIVER FRANKLIN THOMAS
分类号 B29C53/48;B29C63/00;B29C63/06;B29C63/34;B29C63/36;F16L55/165 主分类号 B29C53/48
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