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Journal of Thermoplastic Composite Materials
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Pultrusion of Thermoplastic Composites - New Developments and Modelling Studies

G. Bechtold

Institut für Verbundwerkstoffe GmbH (IVW), University of Kaiserslautern, 67663 Kaiserslautern, Germany, bechtold{at}ivw.uni-kl.de

S. Wiedmer

Institut für Verbundwerkstoffe GmbH (IVW), University of Kaiserslautern, 67663 Kaiserslautern, Germany

K. Friedrich

Institut für Verbundwerkstoffe GmbH (IVW), University of Kaiserslautern, 67663 Kaiserslautern, Germany

Objective of this study is to present new developments in thermo-plastic pultrusion (a pullbraiding process combined with a contact preheating system, and a new online forming method for pultruded profiles) and a new approach for modelling of the preheating process. After modelling of the preheating process of commingled glass fibre/polypropylene yarn, the preheating of a thermoplastic pultrusion line to produce profiles with unidirectional reinforcement in axial direction was modified by adding contact heating pins. Compared to the convective heating used before, profiles with higher qualities could be produced at three times higher processing speeds. First trials of a combined braiding and pultrusion process, also with contact preheating, led to promising results. Furthermore, a process to post-form pultruded profiles immediately after leaving the heated pultrusion die was developed, leading to profiles with a forming radiusof 10 cm.

Key Words: thermoplastic pultrusion • postforming • contact heating • glass fibre/polypropylene • commingled yarn • braiding

Journal of Thermoplastic Composite Materials, Vol. 15, No. 5, 443-465 (2002)
DOI: 10.1177/0892705702015005202
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S. Wiedmer and M. Manolesos
An Experimental Study of the Pultrusion of Carbon Fiber-Polyamide 12 Yarn
Journal of Thermoplastic Composite Materials, January 1, 2006; 19(1): 97 - 112.
[Abstract] [PDF]