Development And Properties Of With 3D High Density Puncture-proof Fabric

The 3D reinforced fabric is one of the most efficient forms in the fiber composites.With the rapid development of fiber composites,studies on 3D fabric have also entered a blossom period.Based on the 2D fabric structures,the insertion of yarns in the thickness direction of 3D fabrics improved the interlaminar shear strength and impact properties due to the connection of the multiple layers.Therefore,using 3D fabric,the whole materials would obtain improved CAI value.In the real manufacturing process,the 3D fabric has the advantage of easy design and low cost,which made it convenient to realize the 3D fabric based products.To meet the requirements of anti-puncture and comfortability of the protective clothing,a new type of light anti-puncture clothing with the 3D orthogonal woven structure has been designed in this study.The anti-puncture fabric was woven on the new 3D weaving machine,which was built based on our previous machine.The main content of the thesis are as follows.(1)A new 3D orthogonal weaving machine has been built according to the design parameters and has been adjusted for weaving regularly;(2)Finished weaving the proper 3D orthogonal fabric with stable size and good mechanical properties;(3)Comparison of the anti-puncture properties between 3D,2D and UD fabric;(4)Optimization of the anti-puncture properties of by increasing the parameters of density,tightness and twist of the 3D fabric;(5)Analysis of the effects of layers of fabrics,weight and laying up processing on the anti-puncture properties.The comparison of the anti-puncture properties of the fabrics with different materials has also been done.The conclusions of the thesis are as follows.(1)The 3D fabric showed superior anti-puncture properties than 2D and UD fabrics under the nearly same fabric thickness;(2)Higher density and tightness leaded to better anti-puncture properties;(3)The fabric with the twisted yams had better anti-puncture properties than the untwisted yam fabric under the same weaving parameters;(4)The method of laying up following the repeatedly order of warp-weft direction exhibited better anti-puncture properties than the uni-directionally laying up method;(5)The combination of elastic backing line with 3D fabric had better anti-puncture properties than the combination of energy-absorption backing line with 3D fabric.