基于热熔法的铺丝用预浸纱含胶量控制

Resin Content Control of Prepreg Tow for AFP Based on Hot-Melt Method

针对轨道飞行器用高模量碳纤维复合材料品种多、批量小、质量要求高的特点,研究自动铺丝用预浸纱制备的质量控制方法。研究了直接热熔法中不同工艺参数对预浸纱含胶量的影响规律,运用正交试验定量分析了诸因素的影响程度,研究结果表明:限位辊与擦胶辊间隙对含胶量的影响最大,其次分别为收卷速率、树脂温度、差速比、放纱张力;制备HS40/CY-10W高模量碳纤维/氰酸酯预浸纱的最优工艺参数为:两辊间隙0.15mm、收卷速率12.56m/min、树脂温度100℃、差速比60%、放纱张力13N。制备的预浸纱宽度稳定、含胶量为34.0±1.0%、离散系数≤0.79%,满足铺丝用精密预浸纱要求。

The high modulus carbon fibre is usually used in orbiting craft due to its properties of multivariety,small quantities and high quality.Quality control of prepreg tow for automated fibre placement（AFP）is discussed.With the help of the hot-melt impregnation winding method,the resin content of the fiber bundle under different processing parameters is analyzed.And the orthogonal experiment is designed to explore the influence degree of each factor.The result shows that：the most important influence factor is the gap between limiting roller and impregnation roller,and the winding speed,resin temperature,speed ratio,and unreeling fibre tension are successively important.The optimal combination of process parameters to prepare HS40/CY-10 W high modulus carbon fibre prepreg tow is determined：The gap between two rollers is 0.15 mm,the winding speed is 12.56m/min,the resin temperature is100 ℃,the speed ratio is 60%,and the unreeling fibre tension is 13 N.Under the optimal combination of processing parameters,the prepred prepreg tow is stable and continuous with resin content as 34.0±1.0% and coefficient of variability equal or less than 0.79%,which can meet the requirement for AFP.