Preparation method of colorful cycle tire tread rubber made of high-filling environment-friendly high-strength tire reclaimed rubber

Abstract

The invention discloses a preparation method of colorful cycle tire tread rubber made of high-filling environment-friendly high-strength tire reclaimed rubber, wherein the use amount of the high-filling environment-friendly high-strength tire reclaimed rubber is 40-55 parts, the preparation method comprises the following steps: an open mill or an internal mixer is adopted to plasticize NR and BR respectively, the NR and BR plasticated rubber are combined and pressed, and reclaimed rubber is added to enable the rubber material to be uniform in texture; a vulcanization accelerator and triethanolamine are respectively added into the rubber material, and uniformly mixed, then white carbon black and pine tar are alternately added, finally sulfur is added, rolling and triangular packaging are performed until various materials are uniformly dispersed, plastifying and mixing time is totally about 25-30 minutes, then performance detection is performed according to GB / T1702-1997, the tensile strength is 16.54 MPa, the elongation at break is 569.9%, and the mechanical property of the cycle tire tread rubber can be well met; the tire performance can be improved, the pollution can be reduced, and the cost of a cycle tire can be reduced by 10-30%.

Description

technical field [0001] The invention relates to a preparation method of a colored tire tread rubber highly filled with environmentally friendly and high-strength tire reclaimed rubber, and belongs to the field of tire manufacturing. Background technique [0002] The tread rubber of rickshaw tires is generally made of natural rubber (NR), butadiene rubber (BR) and styrene-butadiene rubber (SBR). Generally, SBR accounts for about 30%, and the side group of the low-temperature emulsion poly-SBR molecular main chain introduces phenyl , and form vinyl side groups in the butadiene 1,2 structure, which has large steric hindrance, poor molecular chain flexibility, narrow relative molecular chain distribution, and lack of low-molecular-level plasticizing effect, so the processability is poor. Specifically, during mixing, the wettability of the compounding agent is poor, the temperature rises quickly, and the load on the equipment is large; during calendering, the rubber material shri...

AI Technical Summary

Problems solved by technology

[0002] The tread rubber of rickshaw tires is generally made of natural rubber (NR), butadiene rubber (BR) and styrene-butadiene rubber (SBR). Generally, SBR accounts for about 30%, and the side group of the low-temperature emulsion poly-SBR molecular main chain introduces phenyl , and form vinyl side groups in the 1,2 structure of butadiene, with large steric hindrance, poor molecular chain flexibility, narrow relative molecular chain distribution, and lack of low-molecular-level plasticizing effect, so the processability is poor

The specific manifestations are poor wettability to the compounding agent during mixing, rapid temperature rise, and large equipment load; large shrinkage of the rubber during calendering; difficult operation during extrusion, large expansion rate of semi-finished products; poor self-adhesiveness during molding

The amount of rubber used in the tread of rickshaw tires is relatively large. If the rubber material heats up quickly and the mixing time is long, not only the rubber material is easy to burn, but also the power of the equipment is large and many other problems.

In addition, the amount of SBR in the tread rubber is too large, which makes the cost of the tire too high, which is not conducive to the development of enterprises and the use of consumers.

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