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Spread tow fabric
Spread Tow Fabric (STF) is a type of lightweight fabric. Its production involves the steps of spreading a tow in thin and flat uni-directional tape (Spread Tow Tape, STT), and weaving the tapes to a woven Spread Tow Fabric.〔Khokar, N., 1999. A Method for Weaving Tape-like Warp and Weft, J. Text. Inst., 90, Part 1, No. 3.〕 This technique increases the mechanical properties of the material and is also used to reduce weight on composites. Manufacturers of Spread Tow Tapes include Teknomax Corp., Harmoni Industry Inc., Sakaiovex and Oxeon AB.〔 Manufacturers of Spread Tow Fabrics include Oxeon AB.
==About the technique==
The Spread Tow technique, to weave with tapes instead of tows, Tape Weaving Technology, was invented by Dr. Nandan Khokar in 1995. The theory behind Spread Tow Fabric is quite simple, by arranging the fibres in the woven structure in the straightest orientation possible the fibre properties are used in the most effective way to carry load, both in tensile and compression.〔〔Khokar, N. 2004. 3D-Weaving: Making It Happen, JEC Composites Magazine Number 12, Oct-Nov. 2004, p73.〕
STF offers high versatility as it overcomes the limitations of traditional woven fabrics produced using tows. The flatness of STF, which comes from near absence of crimp, significally reduces accumulation of matrix at the interlacing points and thereby the dead weight of the final composite material. This not only reduces the weight of the final composite material product but also eliminates the print-through defects associated with post curing of the undesired matrix accumulation.〔Khokar, N. and Ohlsson, F., 2006. Advancements in Spreading Fibre Tows and Weaving High Performance - Low Weight Fabrics, Proceedings of the 27th International SAMPE Conference 2006, Paris, p284.〕
Although the technique is based on the same principles, the spreading of the tow can be made in different way, for example using water or air.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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