What type of fabric should be used for composite materials

Update: 29-04-2021
Abst: A candy bar with nuts, nougat, and Knitted fabric wool mixed composite fabric chocolate is a composite. Even traditional structural materials are ofte...
A candy bar with nuts, nougat, and Knitted fabric wool mixed composite fabric chocolate is a composite. Even traditional structural materials are often composites. Wood contains both lignin and cellulose and concrete contains sand and carbonate.Most of the time when we think of composites, we think of reinforced polymers plastics.The light weight and very formable plastic gains strength and stiffness through the addition of a higher strength particle or fiber.Although the filler adds strength, these materials are usually used in decorative areas or as secondary structure that carry only relatively small loads.Composites based on continuous fibers are stronger than those based on short fibers or particulate.
Rather than compounding the reinforcement into the plastic, the continuous fibers are formed into a shape that must instead be infused with resin.To form larger structures quickly, manufacturers use different kinds of fabrics. Each type of fabric has advantages and disadvantages.To build thickness, multiple layers must be cut and arranged precisely. In the final composite, failures will initiate at the crimp points in the fabrics and in the layers between the fabrics.Another way to make fabrics is to knit them together.  Using only small knitting threads to bind large yarn bundles, in a warp knitting process, small threads bind multiple layers of the fabric together.The threads do not carry the loads, rather they hold un crimped yarns in place prior to the infusion of resin.
This is distinct from sewing or stitching.Sewing and stitching also use looping threads in a knit-like pattern, but they bind two fabrics that have already been formed. In contrast, the warp knit process forms a single fabric.Some machines can form up to 4 layers of yarns. These layers can be arranged in a variety of directions degree with other angles from 20 to 80 degrees.The lack of crimp in the warp knit fabrics has been shown to increase the final composite strength over a laminate made of 2D woven fabrics. The knitting threads are polymers and are necessarily very small.By adding a number of warp yarns that do not traverse layers warp stuffers some of the in-plane performance was regained. 
However using a single fill insertion and rearranging the individual warp yarns or layers to build the thickness leaves some crimp in both the 0 and 90 degree directions, as well as abrading the warp yarns, even the warp stuffers.The term orthogonal refers to reinforcements in  directions perpendicular to each other. This is the best description for the fabrics that Tex Tech makes.Both the warp and fill the yarns are virtually without crimp. To rapidly make very thick 3D reinforced fabrics, as many as 10 fill yarns are inserted at the same time with our unique multi-rapier looms.In the weaving set-up, the gaps between the individual warp layers are fixed in place, so the warp layer does not move during the weaving.  Only the Z yarns are re-positioned vertically.  This arrangement speeds the ability to make fabrics with large numbers of layers and leads to almost no abrasion of the warp yarns.