T HIS paper summaries the evaluation of using two different nano-particles as UV blocking standard materials for treatment of hi-performance fabrics after UVB exposure. Six woven samples are manufactured using three different weave structure (Twill 2/2, Satin 5, and Weft backed structure), two different high tenacity weft yarn count and materials (polyester and polypropylene) are used. Titanium dioxide-Zinc oxide nano-particles are used as a treated materials to reduce the effect of UVB radiations, after that the samples were exposed to UVB breaking strength and tear strength are performed according to standard test methods to estimate the fabrics performance. The data are statistically analyzed and evaluated for the six samples using t-test for mechanical properties. Scanning electron microscope and ultraviolet protection factor (UPF) are done for samples before and after treatment. The results of Ultraviolet protection factor test shows that nano-titanium oxide material has a better coating treatment than nano-zinc oxide.
Nowadays Lightweight armor is very important and used in many applications. Through this study, Penetration behavior was studied through two different types of armors. The first one produced was lightweight composite armor with reducing the number of layers to less than 25 layers of Kevlar using polyurethane rubber resin with high impact and tenacity properties, while the second produced type was a multilayer armor with less than 25 layers of aramid but without using resin Line-x coating in the back. The hand lay-up technique was used for the first type, while the second type was produced by stitching the back layers. Samples were tested for their properties and its ability to defeat 9 mm bullets in protection level IIIA according to NIJ standards. Afterwards the behavior of the small caliber into the two types by the post firing examination tests were studied, where the results resulted in (no penetration) for the two types and complete protection with very lightweight and very thin armor with different reaction of trauma.
Purpose
This paper aims to investigate the performance of four different textile materials used as an outer shell of the bulletproof vest.
Design/methodology/approach
In this paper, four different textile materials were used, polyurethane treatment was applied as a surface coating for the woven samples. Mechanical properties were conducted for all samples; scanning electron microscope and X-ray energy disperse spectroscopy were executed to show the surface morphology of samples and the chemical composition of the coating material.
Findings
One-way ANOVA was used to statistically analyse the results, which proved that all variables were highly significantly affected by using different textile materials, despite the stiffness variable being not significantly affected by textile materials. An overall evaluation was done using radar chart, demonstrated that Cordura material accomplished the best functional performance, using two types of calibres 7.62 × 54 mild steel core and 7.62 × 54 armour piercing incendiary; the common mechanism was localized burn because of the incendiary effect of the projectile in addition to tearing mechanism starting from inside because of penetration effect of the steel core.
Originality/value
This work was addressed to analyse the impact of using four different materials on its performance as the outer shell of bulletproof vest to achieve the desired degree of protection.
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