Lining of pipelines and passageways
AssigneeInsituform International N.V.
InventorEric Wood
Life of this patent
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Abstract
The present invention provides that in the lining of a pipeline or passageway using a flexible lining comprising a resin absorbent felt, the felt is impregnated with a light curing resin, and light radiation is used for effecting the resin cure. The resin and felt are selected so as to be of a similar refractive index, and so that the resin and fibres are substantially transparent to the curing light radiation which is used. The lining is pre-impregnated and then contained a bag, envelope or sachet of opaque material to prevent it from curing prematurely.
Claims9
A method of lining the interior of a pipeline or passageway comprising applying to the interior surface of the pipeline or passageway a lining comprising resin absorbent fibrous material which is impregnated with a curable resin containing a radiation initiating catalyst, and effecting or initiating the cure of the resin with the lining in position by light radiation, the resin and fibrous material being selected so that the resin and fibres of the fibrous material have similar refractive indices, and the light being selected to give good penetration of the light radiation into the resin and the fibrous material.
Dependencies are inferred from the claim text.