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Self-reinforcement of polyethylene in the injection molding process

This paper describes the basic understanding of self-reinforcement in the injection molding process. The process for self-reinforcement of high-density polyethylene consists of two fundamental steps, the melt deformation and the crystallization. The cause for self-reinforcement of polyethylene are molecular orientations which are fixed in crystalline shish-kebab structures and therefore possess a higher thermal stability. These molecular orientations result from melt extensibilities which can be achieved by design measures on the fluid line in the mold.

The research into the flow behaviour of the resulting crystalline structures and into the different mechanical parameters characterises the self-reinforcement process as well as the self-reinforced components. The major process parameters are the melt deformation, the temperature of the melt, the molding pressure, the molecular weight and its distribution.

Lesen Sie die deutsche Zusammenfassung auf Kunststoffe.de
Author
 Claus Maertin

Claus Maertin
Institut für Werkstofftechnik
Universität - Gesamthochschule Kassel

Information

Free keywords: Self-reinforcement, shish-kebab, nucleation, extensional flow
Institute / chair: Institut für Werkstofftechnik, Universität - Gesamthochschule Kassel
Language: German
Technical consultant for expert services: Prof. Dr.-Ing. Dr. h.c. Gottfried W. Ehrenstein (Betreuer), Prof. Dr.-Ing. G. Mennig, Prof. Dr. rer. nat. E. Seiler
Publication year: 1988
Provider: Wissenschaftlicher Arbeitskreis Kunststofftechnik (WAK) / Kunststoffe.de

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