ANALYSES OF MICROSTRUCTURE AND IMPREGNATION PROCESS OF FRTP COMPOSITES MANUFACTURED FROM WARP-KNITTING FABRIC

FRTP composites were manufactured from a kind of GF/PP warp-knitting fabrics by means of hot-mold compression moulding.The effects of processing conditions in terms of pressure and holding time on microstructure of the materials were studied with SEM,and the impregnation mechanism was proposed based on the SEM photos.The cause of defects in the materials was also investigated. The experiment result that a good quality of impregnation and fiber dispersion could be achieved under appropriate processing conditions indicates the feasibility of warp-knitting fabrics to manufacture FRTP composites.