THE PROCESS OF THERMOPLASTIC PULTRUSION USING GLASSFIBER/POLYPROPYLENE COMMINGLED YARNS

Abstract

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

CLC Number:

TB332

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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