All-steel radial tire combined rubber compound for improving shoulder separation and tread separation

Abstract

The invention discloses an all-steel radial tire combined rubber compound for improving shoulder separation and tread separation. The all-steel radial tire combined rubber compound is respectively used for preparing shoulder pad rubber and base part rubber. The all-steel radial tire combined rubber compound comprises, by weight, 80.0-100.0 parts of natural rubber, 0-20.0 parts of cis-polybutadienerubber, 15.0-45.0 parts of carbon black, 8.0-15.0 parts of white carbon black, 3.0-6.0 parts of zinc oxide, 1.0-3.5 parts of an activator stearic acid, 1.0-2.0 parts of a carbon black dispersant, 0.5-2.0 parts of an antioxidant RD, 1.0-2.5 parts of an antioxidant 4020, 1.3-3.8 parts of a silane coupling agent, 1.5-3.0 parts of insoluble sulfur IS7020, 0.8-1.8 parts of an accelerator NS, 0.1-0.3 part of a scorch retarder and 0.5-2.0 parts of alkyl phenol disulfide. The above formula rubber compound has a high modulus at a given elongation, so the deformation of a tire under the same load is reduced, thereby heat generated by compression deformation and curling is reduced; and the rubber compound has the advantages of low dynamic heat, good aging resistance, improvement of the long-time high load driving resistance of the tire, and effective reduction of the shoulder separation, tread separation and other symptoms.

Description

technical field [0001] The invention belongs to the technical field of rubber compound production for all-steel radial tires, and in particular relates to a combined rubber compound for all-steel radial tires that improves shoulder and crown voids. Background technique [0002] During the driving process of the tire, due to the large shear deformation of the belt layer edge of the all-steel radial tire, in order to protect the belt layer from delamination due to impact force, a tire is placed at the end of the tire shoulder on both sides of the belt layer. Shoulder pad glue. The shoulder pad rubber separates the ply and the end of the buffer layer, so that the hard tread smoothly transitions to the soft sidewall, and transfers and absorbs the stress concentrated on the shoulder under dynamic conditions, reducing the risk of empty shoulder and bending deformation of steel cords. Since the shoulder pad rubber is located in a high-stress area, it should have excellent fatigue...

AI Technical Summary

Problems solved by technology

In order to ensure the comprehensive performance of force, the raw rubber in the company's existing shoulder pad rubber formula and base rubber formula system is mainly natural rubber. Although the performance requirements of low heat generation can be achieved by optimizing the reinforcement system and vulcanization system, it is limited Due to the characteristics of the raw rubber system, the anti-aging performance, anti-vulcanization reversion performance and anti-fatigue performance of rubber materials have limited improvement, the modulus of modulus is slightly lower, and the improvement effect of shoulder and crown hollow problems is low.

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