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Y.D.Huang*, L.Liu, Y.F.Sun, J.H.Qiu1, N. Nakayama1, T.Kumazawa1 Department of Applied Chemistry, Faculty of Science, Harbin Institute of Technology, P.O.Box 410, Harbin 150001, People’s Republic of China 1Department of Machine Intelligence and Systems Engineering, Faculty of System Science and Technology, Akita prefectural University, 84-4 Tsuchiya-Ebinokuti, Honjyo, Akita 015-005, Japan (Received 10/01; accepted 5/02) *(Author to whom correspondence should be addressed) ABSTRACT A beta-ray monitoring technique has been developed to measure the resin content during the manufacture of prepreg unidirectional tapes by solution impregnation process. A series of calibration relations have been obtained for aramid, carbon and glass fibres reinforced epoxy prepreg tapes, and good agreements with resin content have been shown by the beta-ray system and conventional solvent extraction method. Moreover, the effect of the variation of the fibre areal weight on measuring accuracy has been analysed. Keywords: prepreg tape, resin content, beta-ray, on-line monitoring
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