A dense / foamed rubber sole and its special foamed rubber

The present invention discloses a compact / foamed rubber sole and its special foam rubber. The present invention provides foam rubber, the ratio by mass is made of the following components: natural rubber 60.0 to 80.0; 20.0 to 40.0 Neoprene; 50.0 ~ 100.0 reinforcing filler; Zinc oxide 5.0 to 10; Vulcanization accelerator agent, from 1.0 to 2.5; 0.5 to 2.0 sulfur; foaming agent from 0.5 to 5.0. The present invention further provides a dense / foamed rubber soles, consisting of a solid rubber layer and a foamed layer composed of; the foamed layer made of the above Styrofoam. The present invention provides a plastic foam having good thermal stability, cell uniformity, good dimensional stability, low density, soft, flexible, fire-retardant and other advantages. The present invention provides a foamed rubber sole can effectively reduce the weight and improve flexibility, increase the comfort of the sole.