Preparation method of white carbon black/natural rubber composite material

Abstract

The invention belongs to the technical field of natural rubber wet mixing, and relates to a preparation method of a white carbon black/natural rubber composite material. Wet mixing process is adopted,the preparation method comprises the following steps: respectively preparing white carbon black and an auxiliary agent into uniform micron-sized dispersion solutions through mechanical grinding; mixing with natural latex, slowly stirring to enable the natural latex to be in full contact with the white carbon black and the auxiliary to reduce the stability of natural latex, continuously stirring to flocculate into a gel; and carrying out extrusion to realize dehydration and drying of the gel to prepare the white carbon black/natural rubber composite material. The advantages that the quality ofa prepared rubber compound is uniform, the physical property and the dynamic mechanical property are obviously improved compared with those of the traditional mixing process, the production period isalso shortened, andmicrocosmic dispersion effect of the white carbon black in the natural rubber is achieved are achieved; the principle is scientific and reliable, the problem ofauxiliary agent andfiller residues caused by acid flocculation can be solved, the rubber internal mixing time is shortened, the problem of flying of rubber assistants is avoided, and the rubber production efficiency isimproved.

Description

Technical field: [0001] The invention belongs to the technical field of natural rubber wet mixing, and relates to a preparation method of white carbon black / natural rubber composite material, which has the advantages of environmental protection and low energy consumption, can shorten the production cycle, and makes white carbon black in natural rubber Achieve microscopic dispersion and improve rubber performance. Background technique: [0002] Mixing is the most critical process in the processing of rubber products. The purpose is to fully mix the rubber additives in the formula with the rubber, and to disperse the rubber additives as evenly as possible. Rather than saying that the quality of the mixing result directly determines the rubber The performance and service life of the product, rather than the degree of dispersion and distribution of rubber additives in rubber determine the performance and service life of rubber products, so how to improve the dispersion of rubber...

AI Technical Summary

Problems solved by technology

The study found that although the wet mixing process can improve the microscopic dispersion of fillers, because the flocculation and drying methods are mostly chemical means such as acid flocculation, it will affect the performance of rubber products.

The acidic flocculation method has irreversible defects, which will not only affect the health of the operators, but also corrode the equipment. The long-term drying after flocculation is likely to produce acid gas that affects the environment. If the strong acid is not cleaned, it will also affect the subsequent vulcanization time, and , in the acidic environment, the vulcanization time of the rubber compound will produce hysteresis, which will easily cause overvulcanization and affect the performance of rubber products.

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