Power transmission belt
AssigneeHutchinson
InventorsMarie Dieudonne, Philippe Sonntag, Hervé Varin
Life of this patent
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Abstract
The invention relates to a ribbed power transmission belt exhibiting a toothing made of elastomer based on ethylene/α-olefin elastomer, characterized in that at least the sides of the toothing are coated with a film made of at least partially crosslinked thermoplastic comprising at least 30% of at least one low-density polyethylene having a molecular weight of between 50 000 and 200 000 g/mol. The invention also relates to a manufacturing process which makes use of the application of a said thermoplastic film in the noncrosslinked or at least partially crosslinked state.
Claims18
A V-ribbed power transmission belt exhibiting a toothing made of elastomer based on ethylene/α-olefin elastomer, wherein the toothing comprises a plurality of longitudinal V-shaped teeth each having a pair of converging sides and a vertex disposed therebetween, and wherein the converging sides of the toothing are coated with an antifriction film made of at least partially crosslinked thermoplastic comprising at least 30% of at least one low-density polyethylene having a molecular weight of between 50 000 and 200 000 g/mol, said film having an internal face coating the surface of the converging sides of the toothing and an external face defining an external surface of the coated belt, wherein said at least one low-density polyethylene is incorporated in a blend of polyolefins comprising said low-density polyethylene or in a copolymer based on said low-density polyethylene.
A process for the manufacture of a ribbed power transmission belt having toothing made of elastomer based on ethylene/α-olefin elastomer, wherein the toothing comprises a plurality of longitudinal V-shaped teeth each having a pair of converging sides and a vertex disposed therebetween, said process comprising applying in the noncrosslinked or at least partially crosslinked state, to surfaces of said converging sides made of toothing rubber an antifriction thermoplastic film comprising at least 30% of at least one low-density polyethylene having a molecular weight of between 50 000 and 200 000 g/mol, the film having an internal face coating the surface of the converging sides of the toothing and an external face defining an external surface of the coated belt, wherein the at least one low-density polyethylene is incorporated in a blend of polyolefins comprising the low-density polyethylene or in a copolymer based on the low-density polyethylene.
Dependencies are inferred from the claim text.