| abstract |
The invention relates to a liquid-tight multi-layer film, preferably in the form of a tubular film, which is at least partially permeable to UV radiation, comprising a sequence of layers composed of a layer (a) on the basis of at least one thermoplastic olefin homopolymer or copolymer as one of the outside layers, an adhesion promoter layer (b), an interior layer (c) on the basis of at least one homopolyamide and/or copolyamide, an adhesion promoter layer (d), and a layer (e) on the basis of at least one homopolyamide and/or copolyamide as one of the outside layers, wherein the thermoplastic olefin homopolymer or copolymer of layer (a) has a VICAT softening temperature of at least 100°C. The invention further relates to the use of such a multi-layer film as an interior tube for an insert tube for refurbishing underground pipes, to such an insert tube, and to a pipe refurbishment system suitable for refurbishing underground pipes, preferably underground sewer pipes. |