F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
F16L 11/04 (2006.01) B32B 1/08 (2006.01) C08F 255/02 (2006.01) C08K 3/04 (2006.01) F16L 9/12 (2006.01) F16L 11/12 (2006.01) F16L 11/22 (2006.01)
Patent
CA 2493900
Pipe or tubing of crosslinked polyethylene (~PEX~) containing less than 2% by wt. carbon black provides improved resistance to oxidizing agents such as chlorine and hypochlorous acid in water. The pipe may be further protected with a thin tubular core (inner layer) of high density polyethylene or chlorinated polyethylene. The pipe may optionally have an oxygen barrier layer, such as poly(ethylene-co-vinyl alcohol) (~EVOH~), contiguously disposed radially outward from the carbon-containing PEX layer. The pipe is suitable for potable water applications and for hot water radiant heating systems.
L'invention concerne un conduit ou un tube de polyéthylène réticulé (PEX) contenant moins de 2 % en poids de noir de carbone et présentant une résistance améliorée aux agents oxydants tels que le chlore et l'acide hypochloreux dans l'eau. Ce conduit peut comporter une protection supplémentaire sous la forme d'une partie centrale tubulaire fine (couche intérieure) de polyéthylène à haute densité ou de polyéthylène chloré. Ledit conduit peut éventuellement comprendre une couche barrière d'oxygène, telle que le poly(éthylène-co-vinyle alcool) (EVOH), disposée de manière adjacente radialement vers l'extérieur de la couche de PEX contenant du carbone. Ce conduit convient aux applications utilisant de l'eau potable et aux systèmes de chauffage d'eau par rayonnement.
Backman Arthur L.
Dalal Girish T.
Mahabir Carl M.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Noveon Ip Holdings Corp.
Viega Llc
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