Patent ID: 8475309
Filing Date: 2013-07-02
Classification: B32B,C08C,C08K,C08L,F16G

Abstract:
1. A method of forming a belt comprising: forming a plurality of cords; treating said cords with an aqueous mixture of one or more copolymers not comprising resorcin-formaldehyde latex, obtained starting from a diene monomer and a monomer containing nitrile groups in a weight percentage of between 30% and 39% with respect to the total weight of said copolymer, thereby forming treated cords: wherein said aqueous mixture of one or more copolymer not comprising resorcinol and formaldehyde is constituted by a coating liquid comprising a rubber latex comprising said copolymer, a vulcanizing agent and at least 50% weight of water, forming a fabric; treating said fabric with a non aqueous mixture of one or more copolymers not comprising resorcinol and formaldehyde, obtained starting from a diene monomer and a monomer containing nitrile groups in a weight percentage of between 30 wt % and 39 wt % with respect to the total weight of said copolymers obtained starting from a diene monomer and a monomer containing nitrile groups in a weight percentage of between 30 wt % to 39 wt % with respect to the total weight of said copolymers, thereby forming a treated fabric; forming a body and embedding said treated cords in said body, said body having a plurality of teeth extending from at least one first surface of said body, said body formed of a mixture of one or more copolymers, obtained starting from a diene monomer and a monomer containing nitrile groups in a weight percentage of between 30 wt % to 39 wt % with respect to the total weight of said copolymers and coating said teeth with said treated fabric, wherein said fabric is externally coated with a resistant layer comprising a fluorinated plastomer, an elastomeric material and a vulcanizing agent.