TREAD RUBBER OF STUDLESS TIRE

摘要

PURPOSE:To prepare the title rubber excellent in the braking and driving performance on a frozen road by using a sponge rubber made from a rubber compsn. obtd. by compounding a raw material rubber with leather particles and specific vegetable particles in a specified ratio to make at least the surface layer. CONSTITUTION:At least the surface layer is made up of a sponge rubber made from a rubber compsn. prepd. by compounding 100 pts.wt. raw material rubber comprising a natural and/or diene rubber, 3-30 pts.wt. leather particles (e.g. particles of hide), and 3-30 pts.wt. vegetable particles obtd. by grinding seed shells or fruit pits (e.g. particles of walnut shell).