Process for impregnating spools of textile with a liquid composition
AssigneeSeperef - TMP Societe pour l'Equipment des Reseaux en Canalisations de Matieres Plastiques
InventorsPierre Prudhomme, Jean-Jacques Lafaye, Raymond Rey
Life of this patent
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Abstract
In a process for impregnating a reel of thread in the form of a spool with a liquid resin composition, the thread is arranged on a perforated rigid mandrel so as to form a uniform reel in which the volume of open space approximately corresponds to the desired volume of resin to be impregnated, each spool is then gripped and completely sealed against resin leakage from its ends and, finally, the composition is injected under pressure into the interior of the perforated mandrel whereby there is a homogeneous loss of pressure from the mandrel to the spool's entire exterior curved surface and the resin diffuses uniformly to fill all voids through the spool.
Claims5
A process for impregnating at least one reel of thread in the form of a spool with a liquid composition, for instance of crosslinkable resin, comprising;
- (a) for each said reel, arranging the thread as a uniform reel in which the total open volume approximately corresponds to the desired volume of resin to be impregnated on a perforated rigid mandrel to form a spool, said mandrel having perforations which are staggered and spaced along the length of said mandrel except at the portions thereof aligned with the ends of each said spool,
- (b) gripping each said spool at its ends and completely sealing same against fluid leakage from said ends, and
- (c) injecting said composition under pressure through said perforated mandrel into each said spool so that there is a homogenous loss of pressure from said mandrel to the spool's exterior curved surface and the desired volume of resin uniformly and homogenously impregnates said spool by filling void-free the spaces between said threads and the interstices within said threads.
Dependencies are inferred from the claim text.