ABSTRACT

The increasing number of scrapped tyres constitutes a global problem. One way of recycling them is to mill the rubber waste to produce ground tyre rubber (GTR), which is utilised as a component of fresh rubber compounds for manufacturing new tyres. This paper is focused on the characterisation and application of five grades of GTR produced via three methods: ambient, cryogenic, and waterjet milling. Each GTR was separated using sieves into five size fractions. Each fraction was mixed into a fresh rubber compound based on styrene–butadiene rubber (SBR), natural rubber (NR), and butadiene rubber (BR), designed for agricultural tyre tread. The higher Mooney viscosities of GTR-containing compounds indicate different processability while the curing properties changed only moderately. Smaller GTR particles result in better mechanical properties than larger ones. The waterjet milling process seems to be the most perspective.

摘要

越来越多的报废轮胎构成了一个全球性问题。回收它们的一种方法是研磨橡胶废料以生产轮胎橡胶（GTR），它被用作制造新轮胎的新鲜橡胶化合物的成分。本文重点介绍了通过三种方法生产的五个等级的 GTR 的表征和应用：环境、低温和水射流铣削。使用筛子将每个 GTR 分成五个大小的部分。将每个部分混合成一种基于丁苯橡胶 (SBR)、天然橡胶 (NR) 和丁二烯橡胶 (BR) 的新鲜橡胶混合物，专为农用轮胎胎面而设计。含 GTR 化合物的较高门尼粘度表明不同的加工性能，而固化性能仅适度变化。较小的 GTR 颗粒比较大的颗粒具有更好的机械性能。水刀铣削工艺似乎是最有前景的。