Green tyre in composite structure between wheel track of polyurethane and tyre core of rubber, and fabricating method

Abstract

A composite type composed of polyurethane surface layer and main body of rubber is prepared through treating the surface of main body, synthesizing and modifying the prepolymer of polyurethane, and casting the surface layer. Its advantages are high elasticity and antiwear nature, and low rolling resistance.

Description

technical field [0001] The invention relates to a composite tire and its manufacturing technology, more specifically to a polyurethane tread-rubber carcass composite structure green tire and its manufacturing method. Background technique [0002] The so-called green tires generally refer to radial tires with low rolling resistance, low fuel consumption and low exhaust emissions in the world. Compared with ordinary tires, green tires can reduce rolling resistance by 22-25%, and save fuel by 3-8%. Since the French Michelin Company announced its vigorous development of green tires in 1991, major tire companies in Europe, the United States and Japan have successively accelerated the pace of green tire development. At present, green tires have become a hot topic in the development of the tire industry. [0003] The research on green tires has a history of more than ten years. Generally speaking, there are two main directions. [0004] 1. All-natural r...

AI Technical Summary

Problems solved by technology

However, the room for further improvement is limited

And above-mentioned technology also obviously has the following disadvantages: (1) these tires are all-natural rubber radial tires, and the wear resistance of natural rubber is not high, although through modification such as formula design, the wear resistance of natural rubber tread Still can not meet the needs, especially some technologies to reduce rolling resistance are at the expense of part of the wear resistance, so the tread part is easy to wear, which directly affects the mileage and service life of the tire, and leads to the generation of waste tires. The environment forms "black pollution"

[0006] (2) Due to the strength of natural rubber, the tread rubber of these tires must be reinforced with carbon black and carcinogenic aromatic oils, which are emitted in the air with the wear of the tread, seriously polluting the environment

(3) In addition, in order to reduce the rolling resistance, a large amount of white carbon black is used in the rubber compound, and because of the poor conductivity of white carbon black, there is still a discharge problem in green tires

But there are the following disadvantages: polyurethane carcass has high hardness, poorer elasticity than natural rubber, poor dynamic mechanical properties, high heat generation during driving; high rolling resistance, high fuel consumption, which is not in line with the development direction of green tires, and is not suitable for high-speed car tires ; and the polyurethane carcass molding process and equipment are extremely complex, there are a series of difficult problems such as the structure of the mandrel, the positioning of the traveler, the preforming of the reinforced fabric, and the positioning of the reinforced fabric, and the cost is high