The invention discloses rubber composition, a
processing method thereof, an application of the composition to foam product production and a method. The rubber composition is prepared from a rubber matrix and essential components, wherein the rubber matrix contains a parts of branched
polyethylene and b parts of EPM rubber and
EPDM rubber, a is larger than 0 and smaller than or equal to 100 parts,and b is larger than or equal to 0 and smaller than 100 parts; the essential components comprise 0.5-10 parts of a crosslinking agent and 1.5-25 parts of a
foaming agent. The rubber composition applies to
processing of
sponge sealing strips, foam materials with high foaming ratio, damping
foam rubber boards, light-color high-strength foam boards, foam
solid compound sealing strips as well as solidtires filled with foam elastomers. The rubber composition has the beneficial effects as follows: branched
polyethylene not only contains short
branch chains of methyl, ethyl, propyl, butyl, amyl andthe like, but also contains long
branch chains with
carbon number larger than 6, by replacing
ethylene propylene rubber in the
foam rubber composition partially or completely with branched
polyethylene, melt strength of the rubber composition can be improved, foamability, especially pre-foamability of the composition is improved, and the obtained rubber products have lower
compression set.