Patent ID: 6032698
Filing Date: 2000-03-07
Classification: B29C,F16L

Abstract:
A method for lining a pipe or duct through a sealing internal lining with a plastic coated flexible tube adhering to the inner wall by means of adhesive, comprising the steps:filling a metered amount of adhesive into said flexible tube in uniform distribution over the length of the flexible tube,depositing a slip additive layer having a viscosity within the range of 2 to 1300 Pas at ambient temperature onto the outside of the flexible tube, wherein the viscosity of the slip additive is reduced by heating to a range between 10 to 2000 mPas,introducing said flexible tube into said pipe or duct, by securing one end of said flexible tube to the rear end of the pipe or duct with respect to the moving direction of said flexible tube, and turning said flexible tube inside out after the slip additive has cooled and its viscosity has increased, and;generating an internal pressure inside said introduced flexible tube in order to press said flexible tube against he inner wall of the pipe or duct until the adhesive between said flexible tube and the inner wall of the pipe or duct is cured.