Cut resistant and energy absorption materials

Examples of composite materials and hybrid structures having unique cut resistance and energy absorption properties in protective clothing and personal protection equipment (helmet, knee protection panel, gloves, protection curtains, protection tent and shield, etc.) are discussed in this section. 

Composite materials and hybrid structures are usually employed to provide multiple functions in addition to cut resistance requirements. Composite cord threads using stainless steel filaments as core, and other high performance fibres as sheath, are used in cut resistance fabrics to provide both flexibility and cut protection. A flexible body armour vest made from a combination of Dyneema high performance polyethylene fibre from Royal DSM (Dutch State Mines), and Steelskin steel cord material from Bekaert, offering both ballistic-proof and stab-proof protections from gunshots, shrapnel and knives stabs has been reported. 

Some high performance fibres (e.g., p-aramid and m-aramid fibres) have poor abrasion resistance in this case, they are usually blended with fibres having superior abrasion resistance properties, combined with polyurethane coating, or layered with nylon fabrics. Fabric containing nylon filaments has been widely used as a durable layer for military and civil PPE to protect military personnel, chainsaw operators and motorcyclists. For example, the rigorous requirements of abrasion, impact, cut and burst 

Fabric/material Pounds of force until fabric tears Abrasion cycles on pavement until fabric fails 

CoUon jeans 70 Denier standard nylon 500 Denier polyester 200 Denier standard nylon 500 Denier Cordura 620 Denier Cordura Competition grade leather 1000 Denier Cordura Air mesh Kevlar Stretch Kevlar blend 4.5 pounds to tear 4.5 pounds to tear 8 pounds to tear 7.5 pounds to tear 22 pounds to tear 35 pounds to tear 80-110 pounds to tear 110 pounds to tear 1260 pounds to tear 420 pounds to tear 50 cycles to failure 165 cycles to failure 180 cycles to failure 275 cycles to failure 710 cycles to failure 1200 cycles to failure 1200-1700 cycles to failure 1780 cycles to failure 970 cycles to failure 1800 cycles to failure 

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