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Authors
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Mäder, E. ; Rothe, C.
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Title
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Tailoring of commingled yarns for effective composite properties
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Date
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19.10.2006
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Number
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14388
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Abstract
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Developing commingled yarn technologies and understanding the fundamental interface nanostructures of reinforcement and thermoplastic filaments are of significant current interest. Previous research on commingled yarns was mainly focused on the air-jet texturing process, while the mechanical properties of the composites are strongly influenced by many factors, such as the impregnation homogeneity, the type of hybrid yarn, the unidirectional/textile subassemblies and the variation of the polymer and sizing properties on the fibre, as well as the parameters of the consolidation process. Here, we report a unique melt spinning equipment for E-glass fibre which is compatibly combined with a melt spinning extruder to manufacture commingled yarns. The in-situ commingling enables to combine homogeneously both glass and polypropylene filament arrays in one processing step and without fibre damage compared to commingling by air texturing. Variation of technological processing conditions like diameter ratios, draw ratios, variation of cooling conditions and arrangements of intermingling are investigated. The low flow paths due to good intermingling allow a rapid processing. Besides improved transverse tensile strength and compression shear strength, the sizing enables a good strand integrity with the polypropylene yarn. The interfacial adhesion can be improved with a sizing for glass fibres consisting of aminosilane and maleic anhydride grafted polypropylene film former. We also found that a very small amount of carbon nanotubes in the sizing provides significantly improved interfacial adhesion strength. This is attributed to the change in fracture behaviour of the nano-structured interface and morphology of the surrounding PP-matrix.
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Publisher
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Chemical Fibers International
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Wikidata
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Citation
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Chemical Fibers International 56 (2006) 298-300
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DOI
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http://www.meeting.edu.cn/jingpin/ifdc2006/pdf/b/B_063.pdf
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