1460 results about "Radial tire" patented technology

In the pneumatic radial tire of the present invention, a total strength K0 of a belt layer 20 in a circumferential direction of the tire per unit of width at a tire equator surface position P0 is set greater than a total strength of the belt layer 20 in the circumferential direction of the tire per unit of width at a width position P2 corresponding to ⅔ of a maximum width of the belt layer having the tire equator surface CL as a center. In this way, it is possible to suppress the quantity consume of material in the belt layer 20, and to suppress the amount of expansion of tread rubber in a tread central region in the circumferential direction thereof when a standard internal pressure is charged and when the tire is rotated at high speed, thereby suppressing the growth of tire diameter. Since the expansion amount of the tread rubber in the circumferential direction is suppressed, the tension of the rubber is reduced. Therefore, it is possible to increase the resistance of the tread against the sticking of foreign matter, and even when foreign matter sticks in the tread, it is possible to suppress the growth of the crack.

A pneumatic radial tire includes: at least one carcass layer suspended across left and right bead parts; a belt layer arranged on an outer circumferential side of the carcass layer; and a tread arranged on an outer circumferential side of the belt layer. The tread has a laminated structure in which a thermoplastic film layer of a thermoplastic resin or a thermoplastic elastomer composition is interposed between a tread-side rubber layer and a belt layer-side rubber layer. The thermoplastic elastomer composition is obtained by blending an elastomer in a thermoplastic resin. A process for producing a retreaded tire includes the steps of: forming a base tire from the pneumatic radial tire by softening the thermoplastic film layer through heating so as to separate and remove the tread-side rubber layer, the pneumatic radial tire having the tread worn away; and subsequently bonding a new tread-side rubber layer onto the base tire.

The invention relates to a high abrasion-resistant tread rubber for a middle and long distance highway transportation type radial tire and a producing method of the tread rubber, wherein the producing method comprises the following processing steps:(1) first-stage mixing: adding nature rubber SMR20,butadiene rubber, butadiene styrene rubber and peptizer into a mixing chamber for raw rubber plastication, then adding N234 carbon black, white carbon black, a silane coupling agent, zinc oxide, stearic acid, a dispersing agent and a plasticizer for mixing, finally adding N234 carbon black for mixing, and obtaining the first-stage original rubber by discharging rubber; (2) standing for first time; (3) second-stage mixing: adding first-stage original rubber, the N234 carbon black, an anti-aging agent RD, an anti-aging agent 4020 and microcrystalline wax into an internal mixer for mixing, and obtaining second-stage original rubber by discharging rubber after the mixing; (4) standing for second time; and (5) final mixing: adding the second-stage original rubber, sulphur, an accelerator NS and a scorch retarder CTP (cytidine triphosphate) into the mixing chamber for mixing, and obtaining the tread rubber by discharging rubber. In the invention, the abrasion resistance of middle and long distance highway transportation type radial tires can be greatly enhanced, the producing and working efficiency is enhanced, and energy is greatly saved.

The invention relates to application of a lubricating oil composition in tire fitting, and is mainly used for solving the problem that polymer type fitting lubricating oil in the prior art has no anti-corrosive property to aluminum alloy rim. The problem is well solved by the technical scheme that the lubricating oil composition comprises the following components in parts by weight: a) 10-30 parts of base oil, b) 15-35 parts of corrosion inhibitor, c) 8-20 parts of emulsifier, d) 1-6 parts of oil agent, and e) 5-40 parts of water. The lubricating oil composition can be applied to industrial production of automobile radial tire fitting.

The invention discloses a tyre crown rubber material. The tyre crown rubber material comprises the following raw materials in parts by weight: 60-80 of natural rubber, 20-40 of butadiene rubber BR9000, 0-0.4 of peptizer, 10-30 of intermediate super abrasion furnace black, 25-45 of white carbon black, 3-7 of silane coupling agent, 3-5 of zinc oxide, 1-4 of stearic acid, 1-3 of antiager 6PPD, 0-2 of antiager RD, 1-3 of microcrystalline paraffin, 1-3 of sulfur, 1.5-2.5 of accelerator, 4-6 of fatty acid salt processing agent, 0-1 of anti-reversion agent, 2-5 of environment-friendly arene oil TDAE (Treated Distillate Aromatic Extract), 1-3 of octyl phenolic aldehyde tackifying resin and 0-0.3 of scorch retarder. When mixing is carried out in three sections, partial formula raw materials are subjected to rubber material mixing, and then other formula materials are added for rubber material mixing. The tyre crown rubber material produced by using the tyre crown rubber material formula is good in comprehensive processing property, has the characteristics of low thermogenesis, ageing resistance and tearing resistance and is environment-friendly and can be used for producing green full-steel radial tyre crown.

A pneumatic radial tire for passenger car has a directional tread pattern comprising many blocks formed in a tread portion by a plurality of circumferential grooves extending in a circumferential direction of the tire and a plurality of directional slant grooves obliquely extending with respect to the circumferential direction, wherein at least a part of the directional slant grooves is branched from the circumferential groove near to the pattern center and extends toward and is opened at an end of a ground contact region of the tread, and at least a part of corner portions of each of the blocks forms an acute angle of 10-60° defined by the circumferential groove and the directional slant groove; and a surface of the corner portion of the block having an acute angle of 10-60° is beveled over a distance of 10-30 mm from a tapered end thereof in a longitudinal direction so as to gradually shallow from the tapered end toward a width widened portion of the block in both stepping-in and kicking-out sides of the block.

A pneumatic radial tire and a method for manufacturing the same, a device for forming a band of radial tire, and a method of and device for forming a belt-band-tread rubber assembly. The pneumatic tire including a belt arranged on the radially outer side or a carcass, and a band arranged on the radially outer side of the belt and composed of continuous one to several organic fiber cords wound spirally and approximately parallel to the circumferential direction of the tire. The radial tire manufacturing method including the steps of laminating the predetermined number of belt plies on a belt drum or belt ring for forming a belt, and winding one to several organic fiber cords continuously and spirally in the cicumferential direction of the belt on the outer surface of the formed belt in order to form a band. The band forming device including a means for drawing out a cord to be wound, a means for traversing the letting-off means in the widthwise direction of the belt, and a means for controlling the traverse of the letting-off means. The method of forming belt-band-tread rubber assemblies comprising a step of expanding the diameter of belt drum so that the shape in axial section of belt drum becomes the same or approximately the same as the finished shape of the band in vulcanization mold. The assembly forming device including a diameter-variable belt drum comprising a stretchable forming annular body made of an elastomer, and a means for expanding and contracting the diameter of the annular body, wherein the shape in axial section of the circumferential surface of the annular body in the diameter.

A pneumatic radial tire is provided which comprises an under-belt pad (3) provided circumferentially between edge portions of a belt (1) and a carcass in a shoulder portion thereof, the under-belt pad (3) being of a rubber compound containing 10 to 60 parts by weight of carbon black and 3 to 30 parts by weight of silica with a total amount of carbon black and silica being 20 to 65 parts by weight, 2 to 5 parts by weight of sulfur and 0.5 to 3 parts by weight of resorcin or a resorcin derivative all relative to 100 parts by weight of rubber, and 0.5 to 2 parts by weight of hexamethylene tetratine or a melamine derivative as a methylene donor relative to 1 part by weight of the resorcin or the resorcin derivative, and having a dynamic viscoelasticity E' of 5 MPa to 10 MPa, a loss tangent tan delta of 0.10 to 0.18 and a 300% modulus of 11 MPa to 15 MPa.

The invention discloses a wet smelting method for preparing a natural rubber/nanometer silicon dioxide rubber compound, which comprises the following steps of: mixing natural rubber latex with silicon sol solution to form a wet smelting system; heating the silica sol to generate condensation reaction to generate the SiO2 gel with properties, heating the wet smelting system to generate the silica sol into nanometer silicon dioxide particles in situ and uniformly dispersing the nanometer silicon dioxide particles into NR (Natural Rubber) emulsion to form the NR/ nanometer silicon dioxide rubber compound after condensation and co-precipitation; and mixing the natural rubber latex with a nanometer silicon dioxide dispersing body to form the NR/ nanometer silicon dioxide rubber compound after condensation and co-precipitation. The wet smelting method has the beneficial effects that the mass ratio of natural rubber/nanometer silicon dioxide prepared by the wet smelting method is 100/30-90, and vulcanized rubber of the nanometer silicon dioxide has excellent physical and mechanical properties and is high-quality rubber for preparing truck radial tire tread rubber with high wet skid resistance and low rolling resistance, i.e. green tire.

The invention discloses a rubber composition for a tread of a truck radial tire with low hysteresis loss and belongs to the technical field of rubber tires. The rubber composition comprises the following components in parts by weight: 100 parts of matrix rubber, 5-7 parts of active agent, 15-30 parts of carbon black, 25-40 parts of white carbon black, 2-5 parts of silane coupling agent, 1-3 parts of white carbon black dispersant, 1-3 parts of plasticizer, 1.5-3 parts of accelerant, 3-6 parts of anti-aging agent, 1-2 parts of vulcanizing agent, 0.1-0.3 part of scorch retarder, 0-2 parts of antifatigue and 0-0.6 part of environment-friendly peptizer, wherein the matrix rubber is composed of natural rubber or natural rubber and rare earth cis-polybutadiene, the white carbon black is prepared by a high dispersing precipitation method, and the white carbon black dispersant is a higher aliphatic acid metallic soap mixture. The rubber composition disclosed by the invention has low hysteresis loss and can reduce the rolling resistance of the tire in use, so that the energy consumption of the vehicle is reduced.

The invention relates to a low rolling-resistance high abrasion-resistance recap vulcanized tread rubber compound. The low rolling-resistance high abrasion-resistance recap vulcanized tread rubber compound comprises the following components in parts by weight: 40-60 parts of natural rubber, 40-60 parts of butadiene rubber, 25-32 parts of carbon black, 20-30 parts of white carbon black, 4-6 parts of a silane coupling agent TESPT, 0.1-0.4 parts of an environmentally friendly peptizer, 2-3 parts of stearic acid, 4-6 parts of zinc oxide, 0-2 parts of a carbon black dispersing agent, 0.5-2 parts of an antioxidant RD, 1-3 parts of an antioxidant 4020, 1-2 parts of protection wax, 1-3 parts of sulphur S-80, 1-2.5 parts of a promoter CZ-80, and 0.2-0.4 parts of a scorch retarder CTP-80. A mixing technology of the above rubber compound employs first-stage mixing and primary rubber mixing at low temperature, the produced tread can be used for retreading the tires, compared with conventional retreaded tires, the gasoline consumption during a driving process of the vehicle is reduced by more than 3%, an Akron abrasion index is obviously better than that of the conventional low rolling-resistance load-carrying radial tire tread rubber compound, the total formula cost for recap is reduced.

Provided is a high-performance pneumatic radial tire for passenger cars which uses a hybrid cord composed of an aramid cord and a Nylon 66 cord having different twist counts for the first twist and different twist counts for the second twist, as a reinforcing belt, and thereby has improved high speed durability and steering stability.

The present invention relates to a kind of preparation method of mine-type all-steel radial truck tire tread rubber, which comprises the following process steps: (1) masticating natural rubber, styrene-butadiene rubber and peptizer in a mixing chamber, and then adding charcoal black, silica, silane coupling agent, zinc oxide, stearic acid, plasticizer and anti-crack resin, continue mixing, then add carbon black for mixing, and finally inject aromatic oil for mixing, and carry out mixing after mixing Glue removal to obtain one section of masterbatch; (2) cooling one section of masterbatch to normal temperature; (3) mixing one section of masterbatch with carbon black, antioxidant A, antioxidant B and microcrystalline wax in the mixing chamber, mixing After refining, carry out debinding to obtain the second-stage masterbatch; (4) cool the second-stage masterbatch to normal temperature; (5) mix the second-stage masterbatch and sulfur, accelerator and anti-scorch agent in the mixing chamber, mix After the rubber is discharged, the finished tread rubber is obtained. The invention can improve the crack resistance, fracture resistance, fatigue resistance and impact resistance of the radial tire tread.

In a pneumatic radial tire for trucks and buses mounted on an approved 15° drop center rim, an outer surface portion of a composite side-rubber and/or an envelope surface of the bead core among members constituting the bead portion of the tire has a curved shape concavedly directed toward the outside of the tire at a region opposite to an inner curved surface of a slantly rising portion in a flange of the approved rim.

A run-flat tire of the present invention is a pneumatic radial tire for passenger vehicles which has a carcass composed of plies of radially arranged cords toroidally extending between a pair of bead portions, and the a W/L ratio of the section width W to the outer diameter L of the tire is 0.25 or less.

The invention discloses a use of a trans-1,4-polydiene composite rubber, and an application formula of the trans-1,4-polydiene composite rubber. The composite rubber is composed of 10-80% by mass of trans-1,4-polyisoprene and 20-90% by mass of a trans-1,4-butadiene-isoprene copolymer, and the copolymer is composed of 0.1-99.9mol% of a butadiene unit and 0.1-99.9mol% by mole of an isoprene unit. The substitution of natural rubber and/or styrene-butadiene rubber and/or butadiene rubber in a tire surface rubber by 5-30 parts of the composite rubber obviously improves the wear resistance of a tire and reduces the rolling resistance. The substitution of natural rubber and/or butadiene rubber in the sidewall rubber of the tire by 5-50 parts of the composite rubber obviously improves the crack increasing resistance of the tire, reduces the rolling resistance and heat generation, and makes the good traction performance of the tire be maintained, so the composite rubber is especially suitable for dynamic use rubber products comprising tires, damping materials and the like, especially tire surface rubber of all-steel radial tires or high duty tires.

PCT No. PCT/JP97/02587 Sec. 371 Date Feb. 25, 1998 Sec. 102(e) Date Feb. 25, 1998 PCT Filed Jul. 25, 1997 PCT Pub. No. WO98/04424 PCT Pub. Date Feb. 5, 1998A pneumatic radial tire has at least two belt layers disposed at a tread portion thereof, wherein the two belt layers are constituted by inclining a strip formed by aligning a plurality of reinforcing cords to a tire circumferential direction and extending it zigzag in the tire circumferential direction so that the strip is turned back from the lower belt layer to the upper belt layer at both end portions of the two belt layers, and zone portions in which the reinforcing cords incline to the right in the tire circumferential direction and the zone portions in which the reinforcing cords incline to the left in the tire circumferential direction are alternately arranged.

The invention relates to a zero degree belt compound of all-steel radial tire, which is characterized by being prepared from a plurality of raw materials. The raw materials in formula comprises 10# natural rubber, carbon black N375, carbon black N660, hydrated silica, zinc oxide, modified alkylphenol- formaldehyde resin TKM-M, N-(1,3-dimethylbutyl)-N'-phenyl p phenylenediamine, resorcinol formaldehyde resin, cobalt boroacylate, hexamethoxy methyl melamine, N-t butyl-2-benzothiazolesulfenamide, insoluble sulfur HD OT20 and N-cyclohexylthiophthalimide. The invention is used as zero degree belt compound in all-steel radial tire production. The rubber compound of the invention has the advantages of reducing extrusion temperature of the zero degree belt, improving extrusion speed, increasing surface viscosity of the zero degree belt, prolonging holding time of viscosity, improving rubber-coating effect, and effectively solving the quality problems of point-like copper exposition and poor surface viscosity.

The invention relates to a three-drum forming method of a full steel wire loading radial tire via a one-time method, belonging to the manufacturing technical field of a tire. A tire bead is located by a magnet absorption ring, a tire cord joint adopts an automatic seaming type joint, an inclined angle between an lining layer/a tire-side composite component joint and a tire cord is more than or equal to 6 degrees, the joint adopts automatic lamination, and weighing control of each tire blank is implemented by adopting a device which repairs the tire in the front and dismounts the tire at the back for a material feeding frame. In such a forming process, an automatic level and production efficiency of the forming are improved, a labor intensity of operators and a quality defect caused by human factors are reduced, a forming storage space and a transportation line are optimized, and the quality and the cost control level of products are improved.

The invention discloses an air-barrier glue for all-steel-wire truck radial tires, as well as a preparation method thereof. The glue comprises the following components in weight portion: 60 to 80 portions of natural glue, 20 to 40 portions of butadiene-styrene rubber, 40 to 65 portions of carbon black N660 as a reinforcing agent, 3 to 7 portions of zinc oxide as an activator, 1 to 4 portions of stearic acid, 2.5 to 5 portions of 204 resin as a tackifier, 2 to 5 portions of homogenizing agent UB4000 or 2 to 5 portions of homogenizing agent 40MSF, 0.5 to 2 portions of antiager 4020, 0.5 to 2 portions of antiager RD, 1 to 3 portions of protective wax, 2 to 4 portions of aromatic oil as a softening plasticizer, 0.5 to 1.0 portions of sulfur as a vulcanizing agent and 1.0 to 3.0 portions of accelerator NS or 1.0 to 3.0 portions of accelerator TBBS.