High-modulus low-creep transition layer rubber composition of pneumatic tire body and preparation method of composition

Abstract

The invention relates to the technical field of rubber, and particularly relates to a high-modulus low-creep transition layer rubber composition of a pneumatic tire body and the preparation method of the composition. By taking 100 parts by weight of natural rubber as reference, the high-modulus low-creep transition layer rubber composition comprises the following components in parts by weight: 50-60 parts of carbon black, 5-10 parts of zinc oxide, 1-2 parts of anti-aging agent, 1.0-1.5 parts of cobalt salt, 0.1-0.4 parts of peptizer, 1.0-1.5 parts of short fibres, 1.0-1.5 parts of resorcinol donor adhesive, 3.0-5.0 parts of adhesive RA, 1.0-1.5 parts of vulcanization accelerant, 4.5-5.0 parts of insoluble sulphur and 0.1-0.3 part of anti-scorching agent. According to the invention, the modulus of the transition layer rubber material of the tire body is increased, the deformation of the rubber material after being stressed is reduced, and the creep of the rubber material is reduced; and an internal wire-exposure shoulder separation ratio in the middle period and later period of the use of a loading radial tire can be decreased, an internal wire-exposure shoulder separation defect ratio can be decreased, the use safety performance of the tire can be improved, and the use life of the tire can be increased.

Description

technical field [0001] The invention relates to the technical field of rubber, in particular to a high-modulus low-creep pneumatic tire carcass transition layer rubber composition and a preparation method thereof. Background technique [0002] As we all know, radial truck tires have the advantages of wear resistance, fuel economy, and long service life, and their superior performance is increasingly favored by consumers. All-steel radial tires are used in transportation vehicles under harsh transportation conditions such as mining areas and sand fields. Due to harsh service conditions and long-term overloading, the tire shoulder is damaged and delaminated, resulting in a shoulder void, and at the same time, there is an inner thread defect in the inner part of the tire corresponding to the shoulder void, resulting in a significant decrease in the service life of the tire under overload. [0003] Analysis of defective tires: the carcass cords at the shoulders of normal tires h...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, to provide a high-modulus low-creep pneumatic tire carcass transition layer rubber composition and its preparation method, improve the carcass transition layer rubber modulus, reduce the The amount of deformation after stress can reduce the creep of the rubber material, which can reduce the proportion of inner shoulder voids in the middle and later stages of use of the heavy-duty radial tire, reduce the proportion of inner ear shoulder defects, and improve the safety performance and service life of the tire

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