玻璃纤维/聚丙烯复合纤维纱拉挤成型过程

摘要/Abstract

摘要： 采用复合纤维纱拉挤制备连续玻璃纤维增强聚丙烯(GF/PP)热塑性型材,研究了复合纤维纱中PP树脂浸渍连续GF过程。以达西定律为理论基础,研究了影响径向浸渍速率的渗透率、压力、树脂流体黏度等参数随着纤维体积分数、拉挤成型模具结构参数、复合纱物性参数、成型温度的变化。在自主设计的试验线上制备了不同模具结构参数、不同成型温度下的拉挤型材样条,测试其孔隙率和机械性能,并对成型制品断面进行形态观察。实验结果的规律与理论模型分析相符,结果表明:在GF/PP复合纱拉挤过程中,在入模处对纱线施加张力有利于制品的浸渍均匀性;200 ℃~220 ℃的成型温度最有利于树脂的流动浸渍;成型模具热熔区壁面倾角对树脂向纤维束内部的浸渍过程是必要的。

关键词: 玻纤/聚丙烯纤维(GF/PP)复合纱, 热塑性拉挤, 浸渍, 复合材料

Abstract: The impregnating process in thermoplastic pultrusion using glass/polypropylene (GF/PP) commingled yarns was studied. Based on Darcy-Law, variation of pressure drop, transverse permeability and viscosity were investigated under different geometrical/process/material parameter. The pultruded samples were obtained on the lab-designed thermoplastic pultrusion line under different temperature/die geometry. The porosity was calculated, and flexural strength was measured to verify the impregnation process analysis. The study showed that the existence of proper tense helped increasing impregnating uniformity. And 200 ℃~220 ℃ is an optimal mold temperature in melting section for resin flow in impregnation. A conical die wall geometry in melting section is essential for transverse impregnation process.

Key words: glass/polypropylene (GF/PP) commingled yarns, thermoplastic pultrusion, impregnation, composites

中图分类号:

TB332

荆蓉, 张锐涛, 孟雨辰, 王彦辉. 玻璃纤维/聚丙烯复合纤维纱拉挤成型过程[J]. 复合材料科学与工程, 2020, 0(5): 105-111.

JING Rong, ZHANG Rui-tao, MENG Yu-chen, WANG Yan-hui. THE PROCESS OF THERMOPLASTIC PULTRUSION USING GLASSFIBER/POLYPROPYLENE COMMINGLED YARNS[J]. Composites Science and Engineering, 2020, 0(5): 105-111.

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