A method for manufacturing micronized rubber powders including grinding of a rubber granulated feedstock, size classification and storage of the micronized rubber powders thus obtained. A rubber formulation including at least one natural or synthetic rubber, a micronized rubber composition and optionally one or more of processing aids, antidegradants, fillers, accelerators and curatives. A method for manufacturing a rubber product, as well as to a solid rubber product.

A system and method for tennis ball recycling that processes tennis balls into one or more constituent components to generate useful products is disclosed. The system includes a hopper to hold the balls for recycling; a grinder having a plurality of blades to initially cut the tennis balls in a first step to separate the rubber from the nylon; a cyclonic extractor that further separates loose fibers out in a second step; a trommel separator that further filters the broken down components of the tennis balls for use in new products.