A kind of preparation method of the colored rickshaw tread rubber of high-fill environment-friendly high-strength tire reclaimed rubber

Abstract

The invention discloses a preparation method of colored tire tread rubber highly filled with environmentally friendly and high-strength tire reclaimed rubber, wherein the amount of environmentally friendly and high-strength tire reclaimed rubber is 40-55 parts; the preparation method is as follows: firstly, an open mill or The internal mixer plasticizes NR and BR respectively, and then combines the plasticized rubbers of NR and BR for compaction, and adds reclaimed rubber to make the rubber material uniform; add vulcanization accelerator and triethanolamine to the above rubber materials and mix evenly, and then Add white carbon black, pine tar, and finally add sulfur, roll and triangular bag, until the various materials are evenly dispersed with each other, the plasticizing and mixing time is about 25-30min, and then perform performance testing according to GB / T1702-1997, pull The tensile strength is 16.54 MPa, and the elongation at break is 569.9%, which can better meet the needs of the mechanical properties of tire tread rubber; improve tire performance, reduce pollution, and reduce the cost of tires 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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