The invention provides a
rubber material formulation for a high fatigue resistant rubber diaphragm of an automobile
brake chamber, which is mainly prepared by
natural rubber (NR),
styrene butadiene rubber (SBR),
polybutylene terephthalate (PBT), vulcanizing agent,
zinc oxides,
stearic acid, anti-aging agent, dispersant,
accelerant,
carbon black, aromatic oil and white
carbon black. The physical mechanical properties of the rubber diaphragm of the automobile
brake chamber prepared by the rubber formulation all reach the novel standard drafted by the Society of
Automotive Engineering (SAE) of America; the service life of a platform of the rubber diaphragm reaches over 2 million times; the platform has the advantages of
high stress at definite elongation, strength and elongation property, compression fatigue resistivity, flexural deformation resistance and attrition resistance, and maintenance of small variation of the material characteristics within the wide use temperature between 55 and 100 DEG C when the material is used; and the service life of the platform is basically the same as that of an
air brake assembly, and
resource conservation is greatly promoted simultaneously, thereby realizing conversion of the platform from 'a wearing part' to 'a permanent part'.