This document discusses the development of bulletproof fabrics using pure Kevlar and a blended fabric of Kevlar and wool. It outlines the advantages and disadvantages of each material. Testing showed that the blended Kevlar-wool fabric had better tear strength, energy absorption and breathability compared to pure Kevlar. Ballistic tests found that both fabrics provided adequate protection against bullets when used in vests, though a combination of the two fabrics in a vest is recommended to reduce weight. The document promotes these bulletproof fabrics developed by the Nano Science and Technology Consortium for use in protective jackets and vests.

1. Bullet ProofmaterialFOR Jackets/vests

3. In various attractive designs

5. Non-suitability under wet conditions to the vest of wearer

7. Better energy absorbing capacity and reduced number of layers of fabric in a vest.

9. Comparison of Pure Kevlar and Blended Fabric

11. To increase the protection efficiency of the fiber against penetrating bullet

13. Commercially used synthetic fibres include Kevlar, Ballistic nylon, Twaron, Spectra and Zylon

14. Having varying degree of protection against projectiles because of low friction and extensibility

16. Hence, these are not recommended for use under wet conditions

18. helps in retaining the energy absorbing properties of the synthetic fibre

19. increases the density of the fabric

20. restricts the displacement of Kevlar yarns under the impact of a bullet

21. increases the frictional interaction at yarn intersections and penetrating bullet comes across a stronger resisting force

22. presence of wool makes much harder fabric for a projectile to break the yarns

23. enhances the wearability and comfort of a vest

24. reduce the number of layers of fabric

27. Wet fabrics are easier to tear than the dry fabric

30. The layer at which a projectile was stopped, is taken as a measure of Back Face Signature against stop layer

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. Given that weight plays a significant role, it is suggested that a combination of the two fabrics be used

35. Commercialisation of Ballistic fabrics