Patent ID: 6679966
Filing Date: 2004-01-20
Classification: B29C,B29K,B29L,F16L

Abstract:
A method for producing a tubular liner for sewer pipe restoration work, including a tubular body made from at least one resin impregnated fiber band, and surrounded by an outer film layer including a plastic film and a reinforcing fleece, which method comprises the steps of:(a) shaping at least one resin impregnated fiber band into a tubular body (7); (b) laminating a fleece layer (13) having a thickness of 10 to 250 &mgr;m to at least one side of a plastic film (8) to form a laminate (11); (c) subsequently winding said laminate (11) onto said tubular body (7) so that said fleece layer (13) faces said at least one resin impregnated fiber band; and (d) subjecting said tubular body to a curing process to form a tubular liner solidly bonded with said fleece laminated to said plastic film.