Biaxial Noncrimp Fabrics

Biaxial NCF comprise at least three thread systems, namely 0° yarns (axial or pillar yarns), 90° yarns (weft yarns), and warp yarns. 

Unidirectional NCFs can also be produced with this technology. Then, only weft threads are inserted and connected via warp knitting. 

Warp-knitting machines with biaxiai weft insertion can be classified as feeder unit, warp-knit unit, or take-up unit. 

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Bale opening 98 Bast and hard fibers 42 BCF process 84 Biaxial noncrimp fabrics 242... 

Weft-knitted NCF can be produced as biaxial and multiaxial fabrics or as two- and three-dimensional near-net-shape textile structures. Warp and weft threads out of rovings are superposed and fixed together with loop systems. Due to the course-wise weft insertion the reinforcing threads remain noncrimped. Through the combination of weft insertion over the entire width or part of the width with or without support of a stitch-transferring device and by changing loop sizes on individual needles, three-dimensional near-net-shape preforms can be produced (Hufenbach, 2007). 

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