Preparing method for reducing porosity of tire tread rubber

Abstract

The invention belongs to the technical field of rubber tires, and particularly relates to a preparing method for reducing the porosity of tire tread rubber. The preparing method comprises the following steps that 1, polyisoprene rubber containing trans-azobenzene groups in side chains, carbon black, zinc oxide, stearic acid, an accelerant, an anti-aging agent, sulphur and a scorch retarder are mixed in an internal mixer to obtain a rubber compound; 2, the rubber compound is extruded through an extruder, and the tire tread is produced; 3, the tire tread is placed below an ultraviolet lamp and irradiated. By the adoption of the preparing method for reducing the rubber porosity of the tire tread, the rubber mixing technology does not need to be changed, and steps are easy to implement; cis-trans configuration transformation occurs by utilizing the trans-azobenzene groups on the side chains of polyisoprene rubber under irradiation of the ultraviolet lamp, so that molecular chains are movedand arrayed more compactly, and thus the porosity of the tire tread rubber is reduced; by reducing the porosity, mechanical properties such as tensile strength, elongation at break, tear strength andabrasion resistance of a rubber material are improved, and thus the service life of the tire tread rubber is effectively prolonged.

Description

technical field [0001] The invention belongs to the technical field of rubber tires, in particular to a preparation method for reducing the porosity of tire tread rubber. Background technique [0002] With the rapid development of the automobile industry, the performance requirements for tires are gradually increasing. Tires are often used under complex and harsh conditions, and they are subjected to various deformations, loads, forces, and high and low temperature effects during driving, so they must have high load-bearing performance, traction performance, and cushioning performance. Porosity is an important factor affecting tire performance. There are many types of tire tread specifications. During the extrusion process, there are often more air holes and a high return rate, which makes the tread unable to be used normally and affects the normal production. In addition, the existence of air holes will affect the wear resistance of the finished tire, and there will be ph...

AI Technical Summary

Problems solved by technology

There are many types of tire tread specifications. During the extrusion process, there are often more air holes and a high return rate, which leads to the failure of normal use of the tread and affects the normal production.

In addition, the existence of air holes will affect the wear resistance of the finished tire, and there will be phenomena such as falling blocks and groove cracks.