Rubber composition special for RFT tire tread, mixing method and tire

Abstract

The invention relates to the technical field of new materials for tire manufacturing, in particular to a special rubber composition for an RFT tire tread, a mixing method and a tire. Aiming at a rubber system, a filler system and a vulcanization system of a tread formula, non-modified solution polymerized styrene-butadiene rubber is used as a formula main body, high-dispersion and ultrahigh-specific surface white carbon black with low rolling resistance is used as a filler, meanwhile, the vulcanization system is improved, and the proportion of single-sulfur bonds, double-sulfur bonds and multiple-sulfur bonds in the formula is adjusted; and finally, the purpose of improving the abrasion performance is achieved while the low rolling resistance of the tire is ensured.

Description

Technical field [0001] The present invention relates to the technical field of tire manufacturing materials, and more particularly to a rubber composition, a kneading method, and a tire specifically used for a tread of RFT tires. Background technique [0002] As people's safety awareness is gradually improved, the safety performance requirements of the vehicle also increase, according to statistics, in major traffic accidents in vehicles, due to tire puncture, the owner is more than 50%. This is because the vehicle suddenly exploded at high speed. Since the tire suddenly stressed, the four wheels of the sedan will lose balance, and the steering wheel and direction of the vehicle will lose control, causing the vehicle to turn the car, and therefore a major traffic accident. [0003] In order to avoid the occurrence of the above accidents, a new type of tire containing the supporting glue has emerged in recent years. This tire is also called "zero-pressure tire", and its English is...

AI Technical Summary

Problems solved by technology

[0005] Since the support rubber needs high hardness characteristics, it needs to be filled with a higher proportion of carbon black filler, resulting in higher heat generation of the support rubber; the thick side support rubber of RFT tires also leads to a significant increase in the weight of the tire, with 225 / 45R17 as the For example, the weight of ordinary tires is generally 10.0kg, while the weight of RFT tires is about 11.5kg, an increase of up to 15%. This series of factors lead to high rolling resistance of RFT tires. The rolling resistance labels of RFT tires currently on the market are average. Most of them are E-level, some even reach F-level, and only a few are C-level

[0006] Because the thickness of the sidewall support rubber of RFT tires is relatively thick, and rubber is a poor conductor of heat, RFT tires need to be vulcanized for a long time, and the vulcanization time is more than twice that of ordinary tires, which results in serious oversulfurization of the tread rubber formula. , the physical performance and wear performance dropped sharply; at the same time, due to the high modulus and high hardness of the sidewall supporting rubber of RFT tires, the sidewall hardly deformed when passing foreign objects on harsh roads, which resulted in increased tread deformation. The deformation energy generated by foreign matter is almost absorbed by the tread. This series of reasons has caused the wear of RFT tires to decrease. The best way to improve the wear is to increase the amount of filler used, which will inevitably lead to an increase in tire rolling resistance. , and the rolling resistance of RFT tires has been at a high level due to the special structure. If the rolling resistance is increased again, it will face the risk of downgrading the labeling law or even going off the label

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