涤纶/玻璃纤维针刺热压复合板材的制备及性能研究

Preparation and Properties Study of Polyester/Glass Fiber Needle-punched Hot-pressed Composite Board

为改善玻璃纤维增强PET复合板材的力学性能,将涤纶纤维与玻璃纤维通过针刺复合成非织造布,采用叠层热压成型制备出刚性复合板材。采用力学性能测试,XRD分析研究了铺叠层数、热压压力、热压温度和热压时间对复合板材弯曲强度、拉伸强度、冲击强度和结晶结构的影响。结果表明,铺叠层数为7层时,控制热压压力为8MPa,热压温度为260℃,热压时间为5min,复合板材的弯曲强度、拉伸强度、冲击强度最佳,分别为131.6MPa、93.7MPa、94.8kJ/m^2,且此时PET晶粒尺寸最小,晶体内部缺陷少。

In order to improve the mechanical properties of glass fiber reinforced PET composite board, polyester fiber and glass fiber were needle-punched into a nonwoven fabric, and the rigid composite board was prepared by laminated hot pressing process. With mechanical properties test and XRD analysis, the effects of the laying number, hot pressing pressure, hot pressing temperature and time on the composite board′s bending strength, tensile strength, impact strength and crystalline structure were studied. The results showed that when it was 7 layers and hot pressing temperature 260℃ for 5 min under 8 MPa, the bending strength, tensile strength, and impact strength of the composite board were the best, that was, 131.6 MPa, 93.7 MPa, 94.82 kJ/m^2 respectively, and the grain size of PET was the smallest.