Technical Data Sheets Materials For Defence And Protection Aramid Fabrics Product Description A range of aramid fabrics offering fragmentation resistance and protection against specific bullet threats. Several types of fibre are available; Kevlar 29, Kevlar 129, Kevlar 49, and Twaron. Fibre Properties K29 K129 K49 Twaron Specific Gravity 1.44 1.44 1.45 1.44 Tensile Strength (GPa) 2.9 3.3 2.9 3.2 Modulus of Elasticity (GPa) 83 97 124 80 Elongation at Break (%) 4.4 3.3 2.9 3.3 Maximum Operating Temp. (°C) 220 220 220 220 Applications High performance, low weight, flexible armour e.g. Body armour Flak jackets EOD suits Search suits Anti-ballistic composites e.g. mobile screens Helmets Spall linings Primary armour Insert plates Bomb blankets Vehicle armour Anti Ballistic The complex nature of this topic precludes a detailed discussion. Different applications demand different fabrics, often a combination of two fabrics may offer the optimum cost/performance compromise. Specific information is available on request. Typical Fabrics Quality Threads / cm Weight (g/m²) Weave Specification Kevlar 29 D0235 12.2 ×12.2 280 plain D0516 4.0 × 4.0 268 plain D0532 6.7 × 6.7 460 plain Kevlar 129 D0581 12.2 × 12.2 280 plain D0584 9.6 × 9.2 213 plain D0613 6.7 × 6.7 220 plain UK/SC/4468A D0625 8.3 × 8.3 188 plain D0684 6.7 × 6.7 220 plain UK/SC/4468A D0671 11.5 × 11.5 220 plain Kevlar D0203 6.7 × 6.7 175 plain D0208 6.7 × 6.7 220 plain UK/SC/4468A D0586 8.2 × 8.2 215 plain D0575 13.0 × 12.5 230 plain D0628 6.3 × 6.3 220 plain UK/SC/4468A D0605 6.6 × 6.6 465 plain D0652 3.9 × 3.9 272 plain Fabric Finishes Scoured - this finishing process removes fibre and fabric additives thus increasing anti-ballistic efficiency. Scoured fabric is generally the most efficient but care is needed to prevent the ingress of moisture. Water repellent - ingress of moisture into an aramid fabric is to be avoided at all costs as this decreases the performance of the fabric. The exclusion of moisture may be achieved either by use of a water resistant envelope or a water repellent fabric finish. The water repellent finish does not give complete protection for extended immersion times. Any armour that has been subjected to immersion in water should be thoroughly dried before use. Specific information is available on request. Trauma Attenuation Armour manufacturers and users should note that aramid fabrics are not the most efficient trauma attenuators. The effects of blunt trauma on the body may cause death or serious injury, even if the projectile is defeated. For this reason, we recommend that armour systems include an appropriate trauma attenuation pack. Ultra-Violet Radiation All aramids are adversely affected by prolonged exposure to light. It is recommended that aramid armour is contained within an opaque cover. Aramid fabric in roll from should be stored such that it is protected from prolonged exposure to daylight. Further Details Are available from the Sales Department. All statements, technical information and recommendations contained in this data sheet are given in good faith and are based on tests believed to be reliable, but their accuracy and completeness are not guaranteed. They do not constitute an offer to any person and shall not be deemed to form the basis of any subsequent contract, nor to constitute any warranty or representation as to quality, merchantability or fitness for purpose. All products are sold subject to the seller's Standard Terms and Conditions of Contract. Accordingly the user shall determine the suitability of the products for his intended use prior to purchase and shall assume all risk and liability in connection therewith. It is the responsibility of those wishing to sell items made from or embodying the products to inform the user of the properties of the products and the purposes for which they may be suitable, together with all precautionary measures required in handling those products. The information contained in this leaflet is under constant review and liable to be modified from time to time. Back