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1. (AU2007300576) Fluid transfer hose reinforced with hybrid yarn
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique
What is claimed is:
1.         A flexible hose comprising a tube, a knit fabric, and a cover; said knit fabric comprising a hybrid yarn comprising a first yarn of co para-aramid fibers and a second yarn of meta-aramid fibers. 2. The hose of claim 1 wherein fibers at a surface of said hybrid yarn comprise both co-para-aramid fibers.and meta-aramid fibers.
3.         The hose of claim 1 wherein said knit fabric resides embedded in said hose in between said tube and said cover..
4.         The hose of claim 1 wherein said first yarn and said second yarn are twisted together at up to about 5 turns per inch.
5.         The hose of claim 1 wherein said co-para-aramid fibers comprise a copolymer of para-phenylene terephthalamide and 3,4 oxydiphenylene terephthalamide, and wherein said meta-aramid fibers comprise poly-meta-phenylene isophthalamide.
6.         The hose of claim 1 wherein said co-para-aramid yarn comprises TECHNORA* fiber, and said meta-aramid yarn comprises NOMEX* fiber.
7. The hose of claim 1 wherein said first yarn and said second yarn are twisted together at about I to about 5 turns per inch.
8. The hose of claim 1 wherein said knit fabric comprises from about
50 to about 200 loops per foot.
9. The hose of claim I wherein said hybrid yarn comprises a base yarn having no additional adhesive treatment for-bonding said fibers together or for bonding said cord to said body.
10. The hose of claim 1 in the form of a radiator hose, coolant.hose, heater hose, or CAC hose.
11. A method comprising:
combining at least a first base yarn comprising co-para-aramid and a second base yarn comprising meta-aramid to form a hybrid yarn;
forming a tube;
knitting said hybrid yarn to form a reinforcing fabric layer on said tube; and
forming a cover about said tube and fabric layer.
12.       The method of claim 13 wherein said combining comprises twisting said base yarns together at a twist of up to 5 TPI.
13.       The method of claim 14 wherein said knitting comprises from about
50 to about 200 loops per foot.
14.       The method of claim 15 wherein said first base yarn comprises
TECHNORA* fiber and said second base yarn comprises NOMEX* fiber.
15.       A low-pressure fluid transfer hose comprising a tube, a cover, and a. knit fabric reinforcement as the primary reinforcement; said knit reinforcement embedded between said cover and said tube and comprising a hybrid yarn comprising a first base yarn of TECHNORA* fibers and a second base yarn of NOMEX* fibers; said first yarn and said second yarn twisted together with from 1 to about 5 turns per inch; and said knit reinforcement comprising from about 50 to about 200 loops per foot.
16.       The hose of claim 17 wherein said tube comprises EPDM or CPE and said cover comprises EPDM or CPE.