Bullet proof material technology


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NSTC Brings Bullet Proof Material Technology

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Bullet proof material technology

  1. 1. Bullet ProofmaterialFOR Jackets/vests<br />
  2. 2. Bullet Proof Jackets/Vests<br /><ul><li>For everyday use
  3. 3. In various attractive designs
  4. 4. Able to be worn daily by police, shore patrols, people in life threatening situations (politicians, business leaders, money couriers, civil police force, body guards etc.)</li></ul> About the material <br /><ul><li>Ballistic Fabric using pure Kevlar.</li></ul>Drawbacks:<br /><ul><li>UV degradation
  5. 5. Non-suitability under wet conditions to the vest of wearer
  6. 6. Blended fabric of wool and Kevlar </li></ul>Advantages:<br /><ul><li>Better tear strength even under wet conditions
  7. 7. Better energy absorbing capacity and reduced number of layers of fabric in a vest.
  8. 8. Better breathability and feels good on skin.</li></li></ul><li> Our technology outline<br /><ul><li>Blended Fabric for bullet proof material
  9. 9. Comparison of Pure Kevlar and Blended Fabric
  10. 10. Test Protocol & Discussion</li></li></ul><li>Objectives<br /><ul><li>To overcome the shortcomings of the synthetic fiber
  11. 11. To increase the protection efficiency of the fiber against penetrating bullet
  12. 12. To increase the compatibility to the user</li></li></ul><li>Ballistic Fabric<br /><ul><li>Synthetic Polyaramid Fibres
  13. 13. Commercially used synthetic fibres include Kevlar, Ballistic nylon, Twaron, Spectra and Zylon
  14. 14. Having varying degree of protection against projectiles because of low friction and extensibility
  15. 15. penetrating projectiles can displace these yarns laterally and causes their failure </li></li></ul><li>Impact of Bullet on ballistic fabric <br /><ul><li>The synthetic yarns are displaced by the bullet.
  16. 16. Hence, these are not recommended for use under wet conditions
  17. 17. To overcome the drawbacks of pure synthetic fibres -a combination of Kevlar with natural fibre is used.</li></li></ul><li>Kevlar-Natural Fibre Fabric<br /><ul><li>wool is used in addition to but not as a substitute for Kevlar
  18. 18. helps in retaining the energy absorbing properties of the synthetic fibre
  19. 19. increases the density of the fabric
  20. 20. restricts the displacement of Kevlar yarns under the impact of a bullet
  21. 21. increases the frictional interaction at yarn intersections and penetrating bullet comes across a stronger resisting force
  22. 22. presence of wool makes much harder fabric for a projectile to break the yarns
  23. 23. enhances the wearability and comfort of a vest
  24. 24. reduce the number of layers of fabric
  25. 25. overall weight of the vest is reduced</li></li></ul><li>Kevlar-Wool fabric<br /><ul><li>The number of yarns/cm is determine according to the weight of the fabric and is reflected in the values</li></li></ul><li>Results of tear strength tests for pure Kevlar and Kevlar-Wool blend fabrics<br />
  26. 26. Results of tear strength tests for pure Kevlar and Kevlar-Wool blend fabrics- contd.<br /><ul><li>Presence of wool enhances the tear strength.
  27. 27. Wet fabrics are easier to tear than the dry fabric
  28. 28. In both the WARP and WEFT directions, tear strength of wet</li></ul> wool blend fabric is higher than that of the dry Kevlar fabric.<br /><ul><li>To break the yarns in wool-kevlar blend would need more energy- </li></ul> results in higher energy absorption and more effective in stoppingthe projectile.<br />
  29. 29. ballistic tests<br /><ul><li>Sample panels consisting of 18 to 36 layers of either pure Kevlar and/or Kevlar-Wool blend was tested for ballistic properties according to NIJ IIIA standard by minimum of six shots in a set pattern
  30. 30. The layer at which a projectile was stopped, is taken as a measure of Back Face Signature against stop layer
  31. 31. The average Back Face Signature was 44 mm (Critical BFS)</li></li></ul><li>Conclusion<br /><ul><li>Both pure Kevlar and Kevlar blended with wool fabrics is made available for manufacturing vests in India
  32. 32. As two separate fabrics would be supplied, it provides an opportunity for manufacturer to use either Kevlar only or Kevlar-wool blend only or a combination of the two
  33. 33. Given that weight plays a significant role, it is suggested that a combination of the two fabrics be used
  34. 34. For example, 15 layers of Kevlar and about 14 layers of Kevlar-wool with a layer size of 0.6 m2 would weigh about 4344 g.</li></li></ul><li> Why NSTC <br /><ul><li>Technological development of Ballistic fabrics
  35. 35. Commercialisation of Ballistic fabrics
  36. 36. Delivery of Ballistic fabrics(both Kevlar fabric and the blended fabric)</li></li></ul><li>Nano Science and Technology Consortium<br />A-105, Level-III, Sector-63, <br />Noida-201301, U.P., (India).  <br /> For Queries/Concerns  <br />Tel: +91-120- 4781215-17 Mob: +91-9818206463  <br /> Website: www.nstc.in E-mail: info@nstc.in <br /> Chat: Yahoo ID- nstcchat<br />