Process for mixing tire tread with high white carbon black content

Abstract

The invention discloses a process for mixing tire tread with high white carbon black content. The characteristics of a rubber mixing system based on a one-step method are combined, aspects of internal mixing process optimization (medicine input sequence optimization, as well as 'silanization reaction' condition optimization of an internal mixer), mixing process optimization of an open mixer, and the like are adopted, and the aspect of a formula of the tire tread filled with high content white carbon black and the means of silane coupling agent and white carbon black coordination proportion optimization and the like are combined, so as to achieve the following technical effect: the dispersivity of white carbon black is improved, the abrasion resistance is improved, the high sizing material calorigenesis is reduced, and the rolling resistance is reduced; through the means of combining high temperature silanization reaction of the internal mixer and low temperature section silanization reaction of the open mixer, the silanization reaction degree is improved, and the dynamic performance and processing safety of a sizing material are optimized; the flowability of the sizing material is improved, the post-procedure processability is improved, and the processing energy consumption is reduced; the mixing section number is reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the field of tire manufacturing, in particular to an improved mixing method for treads with high white carbon black content. Background technique [0002] The performance of the tire depends to a large extent on the mixing quality of the compound. The mixing quality of the rubber compound is related to the distribution uniformity of fillers and compounding agents in the rubber. It has been confirmed that there is a certain correlation between the physical properties of the compound and the dispersion of carbon black. The dispersion degree of carbon black in the rubber compound can be directly used to measure the mixing quality of the rubber compound. Better carbon black dispersion will improve the viscosity of the rubber compound, achieve smooth extrusion and low extrusion expansion, improve the physical properties, wear resistance and fatigue resistance of the vulcanized rubber, and reduce hysteresis loss. [0003] The one-s...

AI Technical Summary

Problems solved by technology

At the same time, as the European Union labeling law and the new ECE regulations put forward new requirements for semi-steel tires, the demand for all-silica treads in the market is increasing. It is the general trend to use one-step mixing system to produce all-silica treads. However, at present, there is no report of one-step rubber mixing of all-silica rubber materials in China, and most of them still use the traditional multi-stage mixing method to mix all-silica rubber treads.

The traditional multi-stage mixing method mainly has the following disadvantages: the dispersion of silica is not uniform, which leads to poor wear resistance, high heat generation of the rubber compound, and poor rolling resistance; Early cross-linking, low safety of rubber processing; poor fluidity of rubber, poor subsequent processing performance; many mixing stages, low production efficiency