The invention relates to a low-
odor and low-friction-coefficient injection-molding
skin material and a preparation method thereof. The
skin material contains the following components in parts by weight: 25 parts of high fluidity
polypropylene, 20 parts of grafted EPDM, 15 parts of POE, 35 parts of paraffin oil, 1.5 parts (relative to the use amount of rubber) of
peroxide, 3 parts of a
lubricant and 2 parts of a wear-resisting agent. The preparation method mainly comprises a process of oil-charge pre-dispersion, a process of mico-crosslinking reaction and a process of water crosslinking of
silane grafted EPDM and
granulation, and an exhausting twin-screw extruder is adopted in an
extrusion granulation process. Methods of water crosslinking of grafted EPDM, mico-crosslinking of
ethylene-octylene
copolymer peroxide, heterogeneous-state removal of low molecular-weight polymers and the like are creatively and organically combined together, an elastic phase with excellent resilience, low
odor and
high surface rigidity is formed, and meanwhile, the
skin material with excellent fluidity is prepared by virtue of degradation of
peroxide to a
polypropylene material; and the exhausting twin-screw extruder is introduced in the preparation process for ash removal, so that the
odor of the material is substantially reduced. The injection-molding skin material for an automobile is resistant to wear, low in odor and good in
machining formability, and the human, physical and financial resources of customers are saved.