Stiff cord

Details Stiff cord Stiff cord

1991-11-05

1993-04-13

Bui, Thuy M.

Endless belt power transmission systems or components

Friction drive belt

Including fabric web

F16G 100

Patent

active

052016897

ABSTRACT:
Stiff cords especially useful for reinforcing V-belts are made from yarns formed of extruded filaments. Almost all of the filaments have a core and a complete sheath. The proportion of sheathed filaments, A in percent to all of the sheathed filaments in the yarn, in which the proportion of the sheath in each sheathed filament is (M.+-.0.1) percent of the total volume of the sheathed filament, simultaneously satisfies the conditions A.ltoreq.100; M.gtoreq.0.5; A.gtoreq.30+(0.1 M).sup.8. The sheath is formed of a polymer having a melting point at least 10.degree. C. below the melting point of the polymer forming the core. One such sheathed filament has a core formed of polyethylene terephalate and a sheath formed of a copolymer of polyethylene terephalate and sulfoisophthalic acid.

REFERENCES:
patent: 4083261 (1978-04-01), Speer et al.
patent: 4861323 (1989-08-01), Kobayashi et al.
patent: 4994000 (1991-02-01), Simon et al.

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