Patent ID: 9656438
Date: 2017-05-23
CPC Classifications: B32B,F16L,G02B

Claim:
1. A multi-layered film formed as a hose-shaped outer film for an insert hose of a pipe rehabilitation system, comprising: a plurality of film layers, wherein the film layers have one or more of: a UV absorber contained in at least one of the film layers; and wherein a harmonization of the film layer thicknesses and an overall thickness of the multi-layer provides that the multi-layer film is permeable to UV light and visible light in a wavelength range from 200 to 800 nm at a rate of less than 0.1% and is perceived by a viewer as opaque, and that UV radiation and visible radiation is reflected in a wavelength range from 200 to 800 nm a rate of more than 20%; and wherein the multi-layered film is an outer film for an insert hose of a pipe rehabilitation system and surrounds a hose-shaped carrier system with curable resin, the outer film having an outer film layer towards a sewer to be renovated designated as Layer (a), and an opposite outer layer towards an interior of the insert hose designated as Layer (e), the multi-layered film having a layer structure from the following group: 1) Layer (a): PA (polyamide) or PA mixture; 2) Layer (a): PA or PA mixture; 3) Layer (a): PE or PE mixture with silver-colored pigments; 4) Layer (a): PA or PA mixture;