Extrusion of High Hoop Strength HDPE Tube by Self-reinforcement and the Study of the Structure and Properties of the Sample

Abstract

Abstract: This article introduced a new extrusion method to produce HDPE pipes with greatly increased hoop strength. The schematic structure and theory of this extrusion system were discussed. Appropriate melt pressure and temperature fields, in conjunction with rotating mandrel permit the production of PEpipes with high hoop strength and modulus. The morphology of reinforced products has been studied by WAXD, SEM and DSC. The reinforcement is due to the shish-kebab structure, which is responsible for the improvement of thermal and mechanical properties. The influence of processing parameter such as melt pressure and speed of mandrel on the strength and modulus of hoop and axis directions has also been investigated. The hoop strength increased with increasing melt pressure and rotating speed of mandrel.

Key words: HDPE, Pipe, Self-reinforcement, Shish kebab

CLC Number:

TB324

TrendMD:

JIANG Long, SHEN Kai-Zhi, JI Ji-Liang . Extrusion of High Hoop Strength HDPE Tube by Self-reinforcement and the Study of the Structure and Properties of the Sample[J]. Chem. J. Chinese Universities, 1998, 19(4): 638.

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Extrusion of High Hoop Strength HDPE Tube by Self-reinforcement and the Study of the Structure and Properties of the Sample

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