Thickening and maturing process for sheet molding and bulk molding compounds involves electromagnetic radiation treatment

摘要

The sheet molding(SMC) or bulk molding product(BMC) is subjected to electromagnetic radiation to accelerate the thickening and maturing process. Electromagnetic wavelength range is 100m to 760nm. Irradiation is effected before the compounds are processed and can be carried out either on a machine used for producing the compounds or before the material is placed in a store. Radiation treatment duration and intensity and the selected wavelength depend on the material composition. Irradiation frequency for a Class A LP-SMC is 0.9-2.6GHz.