Abstract: A method for processing rubber granules or rubber powders containing different types of rubber. Vehicle tires containing natural rubber in the tread and butyl rubber in the inner liner are granulated or ground to prepare rubber granules or rubber powders, which are processed in a flotation cell under stirring and with the addition of air. The natural rubber fraction of the rubber granules has a higher tendency to adsorb air bubbles and to rise in the flotation cell, while the butyl rubber fraction remains at the bottom. The rubber granules are separated into two or more rubber fractions with an increased amount of a specific rubber type in each fraction.

Abstract: An apparatus makes a base layer of solid tire blanks having a radially inner rubber-under-core-ply, a middle core ply and a radially outer covering layer and includes a pivoting block having first and second winding drums and a winding system for depositing the rubber-under-core ply and the covering layer on the winding drums. A laying unit has a wire feeder and deposits the core ply on the winding drums. The pivot block defines an axis and is pivotable between first and second positions and is arranged between the winding system and the laying unit causing the first drum to be assigned to the winding system and the second drum to be assigned to the laying unit in the first position. The pivoting block pivots to the second position causing the first drum to foe assigned to the wire feeder and the second drum to be assigned to the winding system.

Abstract: A pneumatic vehicle tire of a radial design, having a tread, a radial carcass, a belt structure with at least two belt plies and with at. least one belt bandage layer, which is arranged radially outside the. belt and is formed by continuously winding a PBT cord in a helical shape in the circumferential direction of the tire. The PET cord has an extension of 3% to 5% given a force of 1.56 cN/dtex at 20° C., and an extension of 7% to 9% at 160° C. The sum of the elongation at tear of the PET cord and the thermal shrinkage determined at 180° C., and with a pretensioning force of 0.01 cN/dtex and a duration of action of two minutes, is greater than 20%.

Abstract: A rubber blend, in particular for vehicle tires and various types of belts and hoses. The rubber blend has the following composition: 95 to 100 phr of at least, one natural or synthetic polyisoprene; 41 to 50 phr of at least one carbon black; 3 to 15 phr of at least, one process oil; 3 to 15 phr of at least one silicic acid; 1 to 7 phr of at least one adhesive resin; and, other additives.

Abstract: A rubber blend, in particular for vehicle tires and various types of belts and hoses. The rubber blend has the following composition; 60 to 85 phr of at least one natural or synthetic polyisoprene; 15 to 40 phr of at least one butadiene rubber and/or of at least one styrene-butadiene rubber which is solution-polymerized and has a glass transition temperature of less than or equal to ?55° C.; 5 to 15 phr of at least one process oil; 15 to 75 phr of at least one silicic acid; 2 to 10 phr of at least one adhesive resin; and, optionally, other additives.

Abstract: A rubber mixture, in particular for vehicle pneumatic tires, straps, belts and hoses. The rubber mixture includes the following constituents: at least one synthetic diene rubber; at least one carbon black; at least one silane; and, at least one amphophilic compound. The rubber mixture ameliorates the target conflict between rolling resistance and wet grip.