... of sheet moulding compound. This is a raw material for mold pressing. The core is chopped strand and unsaturated polyester resins ... :Developed country such as Europ, America and Japan have adpoted SMC in the auto-making, including car, train, tractor and ... do not have obvious problem of environmental pollution,since the SMC encloses intactly, and few styrene gases are discharged. Accroding to ...