TRUE RECYCLING OF RUBBER – MYTH OR REALITY?
David Brown
Location
ACS
Link:
Abstract
Every year, the Rubber Industry scraps more than 10% of its compounds – just because they have been crosslinked. Although not normally accounted for, this material could represent additional profits of between 1.4% and 7% to any organisation capable of recovering it and returning it to the main material stream as a usable compound. In a climate of rapidly increasing raw material costs (some grades of NR up by 60% on last year’s prices), decreasing material availability and increasing competition from both low cost manufacturing areas and new classes of materials, rubber compounders must innovate to survive. Continuously tightening environmental laws and increasing recycling targets are further drivers for change that cannot be ignored. Although this is not new, the need to address the problem is urgent. Despite the welldocumented technical barriers to traditional rubber recycling approaches, a number of processes do exist that enable reuse of scrapped materials, ranging from reuse as a simple filler to reincorporation as a compatible compound. This paper looks briefly at some of the drivers for change and the technologies available for reusing previously scrapped materials. In particular, information is provided on the novel HSM technology, including technical and economic results from its application.