Product Development Of3D Woven Structural Bullet-proof And Puncture-proof Material

With more attention to anti-terrorists, the demand of protective requirements of police has asharp increase nowadays. We have designed a new type of flexible, light, bullet-proof andpuncture-proof fabric which is based on the3D-woven structure. The3D reinforced fabric is oneof the most efficient forms in the fiber composites. With the rapid development of fibercomposites, studies on3D fabric have also entered a blossom period. Based on the2D fabricstructures, the insertion of yarns in the thickness direction of3D fabrics improved the interlaminarshear strength and impact properties due to the connection of the multiple layers. Therefore, using3D fabric, the whole materials would obtain improved CAI value. In the real manufacturingprocess, the3D fabric has the advantages of easy design and low cost, which made it convenientto realize the3D fabric based products.These kinds of3D fabrics are manufactured in3D looms. According to the characteristics ofthe fabric structure, on the basis of research about background and current situation, some designand improvement are made to the main part of the3D loom in the second part of this paper,including the redesign and improvements in the creel, locking device and computer-control system.Good changes like cost saving, space saving and convenient operation are brought about becauseof the replacement of the programmable logic controller (PLC) to computer control. In view ofinsufficient of too wide creel and low utilization rate, design and build of creel to improve theutilization rate and saving space. Previously, we also change the tension control device whichaffects the weaving efficiency and quality. The design and application of automatic sewingtechnology and new reeds, which not only improve the weaving efficiency, but also lay a solid foundation to the realization of industrialization.We have used ultra-dense and3D woven structure fabric with high performance fibers as rawmaterial to weave bullet-proof and puncture-proof material. In the third part, after the researchesand multiple tests of the properties of aramid fiber and Ultra High Molecular Weight PolyethyleneFiber, we have finally used UHMWPE which has prominent performance in all aspects to weave.In order to achieve better industrial fabric applications, we have improved weaving process formany times in the ways of carrying out comparison tests of different brands of yarns through thefiber properties; we have tested the fabric in different directions of stacks and different matches ofcombinations. On the basis of preliminary studies, considering the close relationship between thefabric's tightness and the bullet-proof and puncture-proof's performance, we have improved thebeating strength of the loom and the close coordination of the curving degree to improve thetightness of the fabric. After many times of woven material performance optimization and wovenfabric improvements, the final fabric passed the bullet-proof and puncture-proof test by theministry of public security and totally complied with the test standards. The fabric was passed thetest with many attempts and optimization. Woven fabric parameters are three layers of warps withfineness of1200D, twist of150twists/m and single-density of22singles/cm; four layers ofwefts with fineness of1600D, twist of150twists/m and single-density of15singles/cm; and Zyarn with fineness of200D, twist of400twists/m, single-density of11singles/cm.Considering the increasing threat from knives and other sharp objects is obvious, the need forprotection is greatly increased. The fourth part has introduced the cut-resistant fabric on the basisof bullet-proof and puncture-proof fabric's research. After the cut-resistant test of the fabric withthree warps and four wefts which was made of UHMWP fiber, we found that the effect was farbeyond meeting the standard. After that, we also designed the weaving of the fabric with twowarps and three wefts. And the fabric fully met the test standards. What's more, the fabric withtwo warps and three wefts is more convenient to weave. In this case, with two warps and threewefts fabric we can improve the weaving efficiency, form lighter weight and be more in line withindustry requirements.This paper shows that the bullet-proof, puncture-proof and anti-cutting performance of highstrength and modulus polyethylene3D orthogonal woven fabric is very outstanding, which canprovide enough protection for the armed and security police. At the same time, new3D wovenfabric is much better in weight, design and protective effect compared to the traditional protectivematerials, the improvement of3D woven technology provide effective technical guarantee toindustrialization of3D rotective fabric.