A tire tread comprising a rubber composition based on at least one highly saturated elastomer, a reinforcing filler and a vulcanization system is provided. The highly saturated diene elastomer contains 1,3-diene units and more than 50 mol % of ethylene units, the vulcanization system comprises a dithiosulfate salt of formula MO.sub.3S-S-A-S-SO.sub.3M in which the symbol A represents an alkanediyl group or a group comprising two or more alkanediyl units, which units are connected in pairs by means of an oxygen or sulfur atom, of a group of formula —SO.sub.2—, —NH—, —NH.sub.2.sup.+—, —N(C.sub.1—C.sub.16 alkyl)- or —COO—, or of an arylene or cycloalkylene group and the symbol M represents a metal atom. An improved compromise between the bubbling of the tread at the exit of curing presses and its hysteresis can be achieved.

A head (50), for the co-extrusion of a complex rubber profiled element, includes a lower wall (56) of cylindrical profile, a first extrusion unit (B60) having a first extrusion duct (60) divided into various sub-ducts (60-1, 60-2, 60-3, 60-4), a first profiling blade (62) defining a first shaping profile (P62) that is discontinuous, a second extrusion unit (B64) including a second extrusion duct (64) divided into various sub-ducts (64-1, 64-2, 64-3, 64-4), a second profiling blade (66) including at least one tooth (67-1, 67-2, 67-3) situated in the continuation of a divider (72-1, 72-2, 72-3), and this second profiling blade (P66) incorporating at least one third extrusion duct, each outlet of a third extrusion duct closely adjoining a tooth (67-1, 67-2, 67-3) of the second profiling blade (66), and a third profiling blade (74) defining a final shaping profile (P74).

Station (7) and method of curing for a tread strip (2); provided are: a flat curing mold (9) which is composed of a lower shell (10) and an upper cover (11); and an extractor element (17) which is suitable for extracting the cured tread strip (2) from the lower shell (10) after the curing operation; the cured tread strip (2) has a first wall (13), which has a relief design and is in contact with the lower shell (10), and a second wall (14) which is opposite the first wall (13), and is in contact with the upper cover (11); the extractor element (17) is suitable for adhering to the second wall (14) of the tread strip (2) along the entire length of the second wall (14) itself; and the extractor element (17) is movable perpendicularly with respect to the second wall (14) of the tread strip (2) in order to simultaneously raise the whole tread strip (2) from the lower shell (10).

A method of recycling a thermosetting polymer object of arbitrary shape includes: operating a fixture device to hold and rotate the thermosetting polymer object; operating a smart and modularized water jet cutter device to shatter the thermosetting polymer object outside-in into a wet polymer powder; drying the wet polymer powder; flattening the partially dried wet polymer powder; completely drying the flattened wet polymer powder; and separating the dried polymer powder into first and second groups, the particle size of the first group dried polymer powder being greater than a predetermined value, the particle size of the second group fried polymer powder being not greater than the predetermined value.

A device (100) for forming a complex product of a profiled product produces a complex product from non-protruding rubber layers. There is also a process for forming a complex product of a profiled product from non-protruding rubber layers, performed by the disclosed device (100). A tire production line can include at least one installation (500) having the device (100).

Various method for repairing a tire tread are provided. In one embodiment, a method for repairing a tire tread is provided, the method comprising: providing a tire having a tire tread portion, wherein the tire tread portion includes at least one of a tread block and a tread rib, and wherein at least one of the tread block and the tread rib includes a void resulting from wear or damage of the tire tread portion; scanning the void with a 3D scanner to create a 3D computer model of the void; generating a negative of the void via the 3D computer model, the negative corresponding to a positive removed element representing the material removed from the void; 3D printing a removed element copy using a polymer material; applying an adhesive to at least one surface of the void; applying the removed element copy to the void; and curing the adhesive.

The present disclosure relates to a coextrusion process for manufacturing a profiled element intended to form a tread for a pneumatic tire. The process includes coextruding a first elastomer compound forming an underlayer and reinforcing wedges, a second elastomer compound forming tread pattern blocks supported laterally by the wedges, and a third elastomer compound. The third elastomer compound is different from the first and second elastomer compounds and is interposed between the lateral wall of each wedge and the corresponding tread pattern block so as to form a decoupling interface for separating the mechanical behavior of the wedge from that of the tread pattern block.

The invention relates to an extruder system and a method for extruding cord reinforced extrudate, wherein the extruder system comprises an extruder head with a die for receiving extrusion material and a cord guide for guiding cords in a common cord plane in a cord direction into the die, wherein the extruder system comprises a first extruder and a second extruder, wherein the extruder head comprises a first flow channel and a second flow channel, wherein the extruder system further comprises a first pump and a second pump for receiving the extrusion material from the first extruder and the second extruder and for directing said extrusion material into the first flow channel and the second flow channel.

The present disclosure is directed to actinic radiation curable polymeric mixtures, cured polymeric mixtures, tires and tire components made from the foregoing, and related processes.

The invention relates to an extruder system and a method for extruding cord reinforced extrudate, wherein the extruder system comprises an extruder head with a die for receiving extrusion material and a cord guide for guiding cords in a common cord plane in a cord direction into the die, wherein the extruder system comprises a first extruder and a second extruder, wherein the extruder head comprises a first flow channel and a second flow channel, wherein the extruder system further comprises a first pump and a second pump for receiving the extrusion material from the first extruder and the second extruder and for directing said extrusion material into the first flow channel and the second flow channel.