Tire transition layer and preparation method thereof

Abstract

The invention provides a method for preparing a tire transition layer, including: plasticated rubber preparation, first placing, primary-stage masterbatch preparation, second placing, second-stage masterbatch preparation, third placing and finally refining to obtain a tire transition layer end product. The tire transition layer includes the following raw materials in parts by weight: 100 parts of rubber, 55-65 parts of carbon black, 5-10 parts of zinc oxide, 1-3 parts of cresol resin, 1-4 parts of calcium metasilicate, 1-3 parts of N-(1, 3-dimethyl butyl)-N'-phenyl p-phenylenediamine antiager A, 1-2 parts of 2, 2, 4-trimethyl-1, 2-dihyaroquinoline polymer antiager B, 1-5 parts of sulfur, 1.0-1.5 parts of vulcanization accelerator, 3-5 parts of methylene donor and 0.1-0.3 part of anti-scorching agent, wherein the rubber comprises 85 parts of natural rubber and 15 parts of cis-polybutadiene rubber. The tire transition layer containing cis-butadiene rubber has the advantages that the surface unevenness of the transition layer is reduced, the using amount of a super-tackifying agent is increased, the viscosity of the rubber material is improved, air is prevented from be concealed when semi-parts are compounded, the problem of ply separation or bubbling in a tire cavity is reduced, the usability of the tire is improved, and the service life of the tire is prolonged.

Description

technical field [0001] The invention relates to the technical field of rubber synthesis, in particular to a tire transition layer and a preparation method. Background technique [0002] With the rapid development of social economy and the rapid expansion of the demand for transportation facilities, people's demand for automobile tires is increasing, and the requirements for driving safety are also getting higher and higher. Therefore, all tire companies are rapidly expanding their scale. , Improve production efficiency to increase output, so there is a higher requirement for the stability of tire quality. This requires tire companies not only to make progress in structure and formula design, but also to put forward higher requirements for the stability of tire technology and production process control. [0003] In the production of tires at home and abroad, due to the design characteristics of the traditional transition layer formula, there are many problems of tire delamin...

AI Technical Summary

Problems solved by technology

[0003] In the production of tires at home and abroad, due to the design characteristics of the traditional transition layer formula, there are many problems of tire delamination or tire bubble. Steel cord formula, in the production process, this formula has strict requirements on process control and is sensitive to temperature control. The phenomenon of frosting of the rubber material often occurs when the extrusion temperature is super high, and the surface is uneven during the rolling process, which is easy to cause compounding of semi-finished products There is air in the tire, and this problem has not been completely solved, so there are still problems such as high extrusion and calendering temperature of the transition layer, uneven rubber surface, and air in the vulcanized tire. These problems lead to low performance and short life of the tire.

After the transition layer rubber is calendered and cooled, it will be laminated with the inner liner during calendering, which will cause many technical problems in the tire manufacturing process. Small air bubbles are easy to produce tire bubbles or tread delamination during calendering, molding, and vulcanization, which will bring hidden dangers to tire quality

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