PROCESSO PARA A PRODUCAO DE UM PNEU DE VEICULO

摘要

Strips of material used in the construction comprise differing mixtures, each conferring desirable tire properties. They are applied simultaneously or successively in different radial regions of the volume occupied by the finished tread strip. Preferred Features: The radially innermost part of the tread is the base. Between base and surface in road contact, the tread strip comprises two wound strips of different material. The radially innermost part of the tread strip, and parts contacting the road comprise strips of carbon-black filled base mixture. Remaining areas between base and road contact surface are formed by a wound strip of capping mixture, or are filled by inlaying a thicker single strip. Strips of second and first materials are applied together. Strips of differing properties are laid such that their alternating regions contact the road during running. Shoulders and/or radially outer zones are made with a winter-mixture strip. Rubber contacting the road contains silicic acid filling. The rubbers used have differing electrical conductivity. Fine incisions or grooves are introduced in strips during vulcanization. These strips have higher electrical conductivity in the vulcanized state. During construction they contact another mixture having high electrical conductivity. A thinner strip is wound on, made from a mixture having higher electrical conductivity when vulcanized.