碳纤维/乙烯基树脂预浸料双真空袋成型工艺研究

Research of double vacuum bag molding process for carbon fiber/vinyl resin prepreg

本文使用乙烯基树脂预浸料以双真空袋成型工艺制备复合材料,研究了阶梯固化制度对制品力学性能及孔隙率的影响,当固化工艺为100℃/3 h+140℃/4 h,且在固化前期维持内层袋膜真空度为-0.075 MPa 2 h时,成型4 mm厚层合板力学性能最好,孔隙率最低为0.45%,成型10 mm厚层合板时,孔隙率为1.75%,也小于2%,证明了该工艺成型厚板的可行性。

In this paper, vinyl resin prepreg is used to form composite materials by double vacuum bag(DVB) molding process. The influence of the step curing system on the mechanical properties and porosity of the product was studied. The optimum mechanical properties have heen realized when being cured 3 hours at 100 ℃, then cured 4 hours at 140 ℃ and the vacuum degree of the inner bag film is maintained at-0.075 MPa for 2 hours in the early stage as a curing process to form a 4 mm thick laminate, and the porosity is the lowest, 0.45%. When forming 10 mm thick laminate, the porosity of the laminate is 1.75%, which is also less than 2%. It proves the feasibility of forming thicker laminates by this process.