Method of manufacturing a pipe liner bag

F - Mech Eng,Light,Heat,Weapons – 16 – L

Patent

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Details

F16L 55/162 (2006.01) B29B 11/04 (2006.01) B29C 31/00 (2006.01) B29C 63/34 (2006.01) B29C 70/68 (2006.01) F16L 55/165 (2006.01) B29C 53/38 (2006.01)

Patent

CA 2221595

The present invention provides a method of readily manufacturing a multi-layer pipe liner bag with a good workability. A guiding tube is inserted into an outer layer composed of a tubular resin absorbent material and a plastic film coated over the outer periphery of the tubular resin absorbent material. An inner layer composed of another tubular resin absorbent material is inserted into the guiding tube, and the guiding tube is extracted with the outer layer and the inner layer being fixed. The tubular resin absorbent materials of the outer layer and the inner layer are with thermosetting resin to complete the pipe liner bag. Since the outer layer and the inner layer are manufactured separately, the manufacturing of the respective layers can be performed with a good workability. Also advantageously, the plastic film covering the outer surface of the outer layer can be prevented from scratches and so on.

Cette invention concerne une méthode de fabrication aisée de manchons de revêtement intérieur multi-couches pour canalisations enterrées, caractérisés par une bonne ouvrabilité. Un tube-guide est inséré dans une couche extérieure composée d'un matériau tubulaire en résine absorbante qui reçoit sur sa face extérieure une pellicule de plastique. Une couche intérieure faite d'une autre résine absorbante est insérée dans le tube-guide qui est extrait, les couches intérieure et extérieure étant fixes. Les résines absorbantes constituant les couches intérieure et extérieure sont imprégnées de résine thermodurcissable en dernière étape de la fabrication. Comme lesdites couches sont réalisées séparément, on peut leur conférer une bonne ouvrabilité. Le procédé offre également l'avantage de protéger la pellicule plastique de revêtement extérieur contre les éraflures et autres dommages analogues.

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