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Advances in Mechanical Engineering
Volume 2013 (2013), Article ID 496274, 7 pages
Research Article

Developing Simple Production of Continuous Ramie Single Yarn Reinforced Composite Strands

1Graduate School of Science and Engineering, Yamaguchi University, Yamaguchi, Ube 755-8611, Japan
2Department of Mechanical Engineering, Yamaguchi University, Yamaguchi, Ube 755-8611, Japan
3Product Management Division, Kayaku Akzo Co., Ltd., Yamaguchi, Sanyo-Onoda 755-0002, Japan

Received 2 June 2012; Revised 28 December 2012; Accepted 20 January 2013

Academic Editor: Amar Mohanty

Copyright © 2013 Hyun-Bum Kim et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper deals with long fiber-reinforced composite strands using continuous ramie yarns, in which polypropylene including MA-PP (maleic anhydride-grafted polypropylene) was used as a matrix material. The composite strands were fabricated by a new method called multi-pin-assisted resin impregnation (M-PaRI) process, for which the equipment was newly applied after conventional extrusion process. The composite strands were then pelletized and injection molded. Tensile strength and Young’s modulus of the resultant short ramie/PP reinforced composites were investigated. Results show that this new process improved the mechanical properties of injection-molded specimens.