Toothed belt
AssigneeUnitta Company
InventorJunji Yokoi
Life of this patent
Estimating the term…
Abstract
A toothed belt of the present invention comprises a back surface section and tooth sections that are made of an acrylonitrile-butadiene copolymer (NBR) with a hydrogenation rate of 90% or more; a tooth cloth that covers the surface of the tooth sections and tooth lands, the tooth cloth being made of an industrial nylon raw fiber with a viscosity relative to sulfuric acid of 2.45 to 2.53, a tensile strength of 5 g/denier or more, and a fineness of single fibers of 5 denier or less and being treated with resorcinol-formaldehyde-latex (RFL) liquid in which resorcinol-formaldehyde resin is mixed with a hydrogenated NBR as a latex component; and core fibers with a core diameter of 0.63 to 0.85 mm, the core fibers being made of twisted bundles of glass fibers of high strength.
Claims6
A tooth belt comprising:
- a back surface section;
- a plurality of teeth spaced apart and disposed on one side of said back surface section, whereby a tooth land is formed between two adjacent teeth,
- wherein said back surface section and each of said teeth are made of an acrylonitrile-butadiene copolymer (NBR) having a hydrogenation rate of 90% or more;
- core fibers contacting and interposed between said back surface section and said plurality of teeth, the core fibers having a core diameter of 0.63 to 0.85 mm and comprising twisted bundles of glass fibers;
- and
- a tooth cloth covering the surface of each of said teeth and each of said tooth lands, said tooth cloth being made of an industrial nylon raw fiber with a viscosity relative to sulfuric acid of 2.45 to 2.53, a tensile strength of 5 g/denier or more, and a fineness of single fibers of 5 denier or less, said tooth cloth being treated with resorcinol-formaldehyde-latex (RFL) liquid in which a resorcinol-formaldehyde resin is mixed with a hydrogenated NBR as a latex component.
Dependencies are inferred from the claim text.