Cured in place pipe liner with styrene barrier

Details Cured in place pipe liner with styrene barrier Cured in place pipe liner with styrene barrier

F - Mech Eng,Light,Heat,Weapons

16

L

F16L 55/165 (2006.01) B32B 1/08 (2006.01) B32B 27/12 (2006.01) B32B 27/40 (2006.01)

Patent

CA 2755279

A liner for repairing damaged pipes, such as underground sewer or gas pipes is disclosed. The liner comprises a TPU coating on fibrous mat of non-woven fabric. The TPU coating contains a barrier layer to retard the migration of styrene from the liner to the media used to force the liner against the damaged pipe and to activate the thermoset resin. The thermoset resin converts the liner from a flexible state to a rigid state as the liner is cured in place inside the pipe.

L'invention concerne un chemisage destiné à réparer des conduites endommagées, par ex. des conduites souterraines d'égouts ou de gaz. Le chemisage comporte un revêtement en TPU sur une nappe fibreuse en étoffe non tissée. Le revêtement en TPU contient une couche formant barrière afin de ralentir la migration de styrène issu du chemisage vers le milieu utilisé pour plaquer le chemisage contre la conduite endommagée et activer la résine thermodurcissable. Ladite résine thermodurcissable fait passer le chemisage d'un état souple à un état rigide lorsque le chemisage est durci in situ à l'intérieur de la conduite.

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