Table 1: Compounds of resol resin–carbon fiber–perlite.

Composite materialResol (%) (R)Perlite (%) (P)Carbon fiber (%) (CF)

R10000
R-CF7.510007.5
R90-CF7.5-P1090107.5
R90-P1090100
R80-P2080200
R70-P3070300
R60-P4060400

or resite, after the resol curing.