连续玻纤增强聚丙烯混纤纱织物层压成型工艺研究

采用两种不同形式的混纤纱机织物为原料,利用层压成型的方法制备了连续玻璃纤维(GF)增强的聚丙烯(PP)板材。研究了层压温度、压力、保压时间和混纤纱机织物形式对层压板材的弯曲性能和层间剪切强度(ILSS)的影响。结果表明,当层压温度为230℃,层压压力为8.5 MPa,保压时间为30 min,降温过程冷却速度为0.5℃/min时,层压板材的力学性能最佳。弯曲强度和模量分别达到352.58 MPa、23.09 GPa,ILSS达到27.37 MPa。此时,纤维含量和空隙率分别为72.25%、2.03%。在最优工艺条件下制备的两种不同织物形式层压板材弯曲强度和弯曲模量以及ILSS:2/2斜纹织物平纹织物。两种织物层压板材的空隙率:2/2斜纹织物平纹织物。

STUDY ON LAMINATING PROCESS OF CONTINUOUS FIBER REINFORCED POLYPROPYLENE PREPARED BY HYBRID YARN FABRIC

In this paper,two different forms of hybrid yarn fabric were used as raw material to prepare the continuous glass fiber (GF) reinforced polypropylene (PP) laminated composites by the laminating process.To prepare the laminate with excellent mechanical property,the influences of molding temperature,molding pressure,molding time and the form of fabrics on the flexural property and interlaminar shear strength (ILSS) of the laminated composites were investigated to get the optimal process parameters.The results show that the laminated composites with optimal mechanical property were prepared at hot pressing temperature of 230 ℃,hot pressing pressure of 8.5 MPa,molding time of 30 min and cooling rate of 0.5 ℃/min.The optimal mechanical properties of the laminate are as follows:flexural strength reaches 352.58 MPa,flexural modulus reaches 23.09 GPa,ILSS reaches 27.37 MPa.At this time,the fiber content and the porosity content of the laminate is 72.25％ and 2.03％,respectively.The flexural strength and flexural modulus and ILSS of laminated composites prepared by two different forms fabric under the optimal processing conditions:2/2 twill fabric＞plain fabric.In addition,the porosity content of the two different laminates prepared by two different forms fabric:2/2 twill fabric＜plain fabric.