Toothed belt having coated cores exhibiting improved resistance
AssigneeMitsuboshi Belting Ltd.
InventorsTakahide Mizuno, Nobutaka Osako, Takeshi Murakami, Yasunori Nakai
Life of this patent
Estimating the term…
Abstract
A toothed belt has cores coated with a resorcin-formalin-latex liquid that includes as the latex component at least about 60 wt % of a hydrogenated acrylonitrile-butadiene rubber or a chlorosulfonated polyethylene rubber. The teeth can be covered with a tooth covering fabric that is made from yarns containing at least 50 volume percent of aramid fibers.
Claims14
A toothed belt comprising a backing member rubber and a plurality of rubber teeth extending from a surface of the backing member and at least one core imbedded in the backing member, the at least one core being treated with a resorcin-formalin-latex liquid wherein at least 60 weight percent of the latex component of the RFL liquid is selected from the group of hydrogenated acrylonitrile-butadiene (HNBR) latex in which more than about 80% of the double bonds are hydrogenated and chlorosulfonated polyethylene (CSM) latex.
A toothed belt comprising a rubber backing member and a plurality of rubber teeth extending from a surface of the backing member, at least one core imbedded in the backing member and a tooth covering fabric that covers the at least one tooth, the at least one core being treated with a resorcin-formalin-latex (RFL) liquid wherein the latex component comprises at least about 60 wt % of at least one of a hydrogenated acrylonitrile-butadiene rubber latex having at least 80% of the double bonds hydrogenated and a chlorosulfonated polyethylene latex, the rubber of the backing material and teeth comprising at least one of a hydrogenated acrylonitrile-butadiene rubber having at least about 80% of the double bonds hydrogenated and a chlorosulfonated polyethylene rubber that is cured with a peroxide and the canvas comprising yarns containing at least about 50 vol % of aramid fibers in the longitudinal direction of the belt.
A method of making a toothed belt comprising the steps of:
- providing a rubber backing material containing at least one of hydrogenated acrylonitrile-butadiene rubber having at least 80% of the double bonds hydrogenated and chlorosulfonated polyethylene;
- providing at least one core treated with a resorcin-formalin-latex (RFL) liquid wherein the latex component contains at least about 60 wt % of at least one of a hydrogenated acrylonitrile-butadiene rubber latex having at least 80% of the double bonds hydrogenated and a chlorosulfonated polyethylene latex;
- winding the at least one core around the backing material;
- and
- curing the rubber of the backing member.
Dependencies are inferred from the claim text.