An experimental investigation is carried out to deal with the permeability of preform with resin by applying the unidirectional saturated flow method. Several factors which affect the permeability are studied

including the rate of resin in preform

the ply stacking sequence

the injection pressure and the temperature. The results indicate that the rate of resin in preform influence the permeabiliy

and the laws for different ply stacking sequence are not the same. For glass fabric of (0

90)

the permeability increases first

then decreases

and finally increases as the increasing of resin. The injection pressure and the temperature do not have remarkable effect on the permeability.