Impact of Anti-stabbing Material Thickness from Ultra-high Molecular Weight Polyethylene Fabric on Penetration Depth
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Abstract
The purpose of this research is to investigate the stab-resistant performance of ultra-high molecular weight polyethylene (UHMWPE) fabric molded into a sheet using a hot compression molding process with a thermoplastic resin, referred to as "UPE" in this study. The stab-resistant sheets were layered to the various specified thickness and tested for stab resistance performance using two types of blades: P1, a typical small knife, and S1, a commando-style blade or larger kitchen knife, following the National Institute of Justice (NIJ)-0115.00 standard. Mechanical properties characterizations revealed that the UPE sheet had maximum tensile and tear strengths of 162.50 MPa and 360.74 N/mm, respectively. The minimal thickness that could withstand stabs at E1 (Energy level 1) for both P1 and S1 type blades was 20 layers of UPE, or thickness of 4.8 mm. The E1 is the first energy level of the NIJ stab resistance testing, with an energy of 24 ± 0.50 J. Thus, it is appropriate for use as a stab-resistant material. When UPE was compared to other stab-resistant materials studied, it was discovered that the UPE had lower thickness and areal density than other materials at the same penetration depth. This indicates that the UPE was lighter and thinner than other materials. The light weight and thinness of UPE are significant factors in its development into stab-resistant armor.
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