Pre-fabricated rubber running track and manufacturing process thereof

Abstract

The invention relates to a pre-fabricated rubber running track and a manufacturing process thereof. The invention adjusts the proportion of selected rubber, a UV absorber, white carbon black, aluminum silicate and other components and researches and develops the novel process, and the process is as follows: upper layered material raw rubber plasticating->upper layered material preparation->upper layered material mixing->upper layered material refining->lower layered material raw rubber plasticating->lower layered material preparation->lower layered material mixing->lower layered material refining-> composite extrusion->rolling and edge cutting-> microwave vulcanization spray drying->cold air cooling, truncation and coiling. The invention adopts the novel process, reduces vulcanization process temperature difference, has uniform vulcanization temperature and consistent vulcanization degree, improves the product density, prevents surface cracks, delamination, bubbles and other quality problems, and reduces the labor intensity of a worker and the post manpower. As tested, under the condition of 40DEG C 50pphm, the surface of the running track does not crack for 200h, the rebound value is more than 30 percent, the tensile strength is more than 2MPa, and the tensile strength is more than 1.5MPa after 6h of hot air aging at 100DEG C. Therefore, the weather aging and ozone resistance performance of the running track are greatly improved, and the quality of the running track meets the IAAF standard.

Description

Technical field [0001] The invention relates to a special runway for stadium games, in particular to a prefabricated rubber runway and its manufacturing process. Background technique [0002] For many years, traditional prefabricated rubber racetracks have always had the disadvantage of poor weathering performance. At the same time, the traditional prefabricated rubber racetrack manufacturing process generally uses triple calendering and hot air vulcanization in a vulcanizing tank. The traditional manufacturing process not only has low production efficiency, but also, Due to the large temperature difference in the tank and the uneven degree of vulcanization defects, the product foaming aperture, runway rebound value, tensile strength and other indicators are unstable, and the product is prone to surface cracks, delamination, bubbles and other quality problems. Summary of the invention [0003] In view of the above-mentioned shortcomings in the prior art, in order to improve produc...

AI Technical Summary

Problems solved by technology

[0002] For many years, the traditional prefabricated rubber runway has always had the disadvantage of poor weather aging performance. At the same time, the traditional prefabricated rubber runway manufacturing process generally uses triple calendering and vulcanization tank hot air vulcanization. The traditional manufacturing process not only has low production efficiency, but also, Due to the large temperature difference and uneven vulcanization degree defects in the tank, the product foaming pore size, runway rebound value, tensile strength and other indicators are unstable, so that the product is prone to surface cracks, delamination, air bubbles and other quality problems

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