Improving Stab-resistant Textile Materials with a Non-woven Fabric Structure

Bao, Limin; Sato, Shunsuke; Morioka, H.; Soma, Shinya

doi:10.4188/jte.62.37

Cited by 15 publications

(10 citation statements)

References 11 publications

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“…illustrates the stab-proof performance of each laminated structure. As shown in our previous report[2], the (KKKK) q structure impregnated with silicone rubber exhibited greater maximum load and penetration energy than the KKKK structure, which consisted of four layers of fabric, indicating a high level of stab-proof performance. The stab-proof properties of the newly proposed (Kq)4 structure were somewhat inferior to those of the (KKKK)q structure, with the former yielding readings of…”

supporting

confidence: 58%

“…To date, we have pursued the approach of impregnating fabrics that have a large cover factor with elastomers to "lock" the yarn in place as a way of boosting stab resistance [2]. We have proposed a nonwoven fabric structure that consists of dense, randomly positioned fibers as a low-cost, stab-proof material, and the advantages of that structure have been verified [1].…”

Section: Introductionmentioning

confidence: 99%

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Development of Flexible Stab-proof Textiles Impregnated with Microscopic Particles

et al. 2017

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Most stab-proof vests in use are made from metal plates, whose weight, bulk, and rigidity make them unsuitable for use over extended periods of time. Light, thin, and flexible clothing that protects against knives and other sharp objects is needed. However, achieving high levels of puncture resistance and comfort remains a challenge. While plain textiles can resist slashing, they cannot withstand stabbing. In this study, we investigated the stab resistance of aramid fabrics impregnated with micro-glass particles and nano-silica particles and evaluated the influence of particle size and mass concentration by measuring the load, displacement, and energy when the samples were struck by a blade. Particle-impregnated fabrics showed good puncture resistance. The smaller the diameter of the particles, the greater the material's resistance to penetration. Movement of yarn strands is inhibited by impregnation with particles. Furthermore, the friction force acting on intersecting sections of plain fabric exhibits the largest influence on stab resistance.

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confidence: 58%

Section: Introductionmentioning

confidence: 99%

Development of Flexible Stab-proof Textiles Impregnated with Microscopic Particles

et al. 2017

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“…To date, we have pursued the approach of impregnating fabrics that have a large cover factor with elastomers to “lock” the yarn in place as a way of boosting stab resistance. We have proposed a nonwoven fabric structure that consists of dense, randomly positioned fibers as a low-cost, stab-proof material, and the advantages of that structure have been verified 12 ) . The higher the nonwoven density, the better the stab resistance.…”

Section: Introductionmentioning

confidence: 97%

Development of a high-density nonwoven structure to improve the stab resistance of protective clothing material

Bao

Wang

Baba³

et al. 2017

INDUSTRIAL HEALTH

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The purpose of this research was to enhance the stab resistance of protective clothing material by developing a new high-density nonwoven structure. Ice picks often injure Japanese police officers due to the strict regulation of swords in the country. Consequently, this study was designed to improve stab resistance against ice picks. Most existing anti-stab protective clothing research has focused on various fabrics impregnated with resin, an approach that brings with it problems of high cost and complicated processing. Seldom has research addressed the potential for improving stab resistance by using nonwoven structures, which exhibit better stab resistance than fabric. In this research, we prepared a series of nonwoven structures with densities ranging from about 0.14 g/cm3 to 0.46 g/cm3 by varying the number of stacked layers of Kevlar/polyester nonwoven under a hot press. We then proposed two methods for producing such hot-press nonwovens: the multilayer hot-press method and the monolayer hot-press method. Stab resistance was evaluated according to NIJ Standard-0115.00. We also investigated the relationship among nonwoven density, stab resistance, and flexural rigidity, and here we discuss the respective properties of the two proposed methods. Our results show that stab resistance and flexural rigidity increase with nonwoven density, but flexural rigidity of nonwovens prepared using the monolayer hot-press method only shows a slight change as nonwoven density increases. Though the two methods exhibit little difference in maximum load, the flexural rigidity of nonwovens prepared using the monolayer hot-press method is much lower, which contributes to superior wear comfort. Finally, we investigated the mechanism behind the stabbing process. Stabbing with an ice pick is a complicated process that involves many factors. Our findings indicate that nonwovens stop penetration primarily in two ways: nonwoven deformation and fiber fractures.

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“…Recent material development has enabled the incorporation of puncture-resistant fabrics with neoprene, e.g., Kevlar. While these fabrics have been shown to reduce cuts 18,19 , their ability to withstand shark bites and reduce injuries is unknown.…”

mentioning

confidence: 99%

Response of blacktip reef sharks Carcharhinus melanopterus to shark bite mitigation products

Thiele

Mourier

Papastamatiou

et al. 2020

Sci Rep

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Globally, the frequency of shark bites is rising, resulting in an increasing demand for shark deterrents and measures to lessen the impact of shark bites on humans. Most existing shark protection measures are designed to reduce the probability of a bite, but fabrics that minimise injuries when a shark bite occurs can also be used as mitigation devices. Here, we assessed the ability of the ocean Guardian Scuba7 and Kevlar material to reduce the likelihood of blacktip reef sharks, Carcharhinus melanopterus, from feeding, and to minimise injuries from shark bites. Sharks were enticed to consume a small piece of local reef fish (bait) placed between the two Scuba7 electrodes with the deterrents randomly being turned on or kept off. In the second experiment, the bait was attached to a small pouch made of either standard neoprene or neoprene with a protective layer of Kevlar around it. The Scuba7 reduced the proportion of baits being taken by 67%, (from 100% during control trials to 33%). Sharks also took more time to take the bait when the device was active (165 ± 20.40 s vs. 38.9 ± 3.35 s), approached at a greater distance (80.98 ± 1.72 cm vs. 38.88 ± 3.20 cm) and made a greater number of approaches per trial (19.38 ± 2.29 vs. 3.62 ± 0.53) than when the Scuba7 was inactive. The sizes of punctures from shark bites were significantly smaller on neoprene with Kevlar compared to standard neoprene (3.64 ± 0.26 mm vs. 5.88 ± 0.29 mm). The number of punctures was also fewer when Kevlar was used (14.92 ± 3.16 vs. 74.1 ± 12.44). Overall, the Ocean Guardian Scuba7 and Kevlar reduced the impact of blacktip reef shark bites. These findings may help consumers make informed decisions when purchasing shark deterring and protective products.

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Improving Stab-resistant Textile Materials with a Non-woven Fabric Structure

Cited by 15 publications

References 11 publications

Development of Flexible Stab-proof Textiles Impregnated with Microscopic Particles

Development of Flexible Stab-proof Textiles Impregnated with Microscopic Particles

Development of a high-density nonwoven structure to improve the stab resistance of protective clothing material

Response of blacktip reef sharks Carcharhinus melanopterus to shark bite mitigation products

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