Post on 21-Jan-2018
transcript
A
SEMINAR ON
PROTECTIVE TEXTILE
Submitted to
FACULTY OF ENGINEERING & TECHNOLOGY
RAJASTHAN TECHNICAL UNIVERSITY, KOTAfor
The Partial Fulfillment of the Requirements for Degree of
Master of Technologyin
Textile Technology
by:Vijay Babu Gaur
14EMBTT616
M.L.V. TEXTILE & ENGG. COLLEGE BHILWARA (RAJASTHAN)(An Autonomous Engineering College Of Government Of Rajasthan)
2015-2016
PROTECTIVE TEXTILE
Contents:
• Introduction
• Ballistic Protective Textiles
• Principle Of Ballistic Protection
• Types of Armor
• Conclusion
Introduction
Nowadays safety and Protective textiles have become an integral part in one or other form. Safety and Protective textiles refer to garments and other fabric related items designed to protect the wearer from harsh environmental effects that may result in injury or death.
Industrial textiles are used to protect from one or more of the following:
• Extreme heat and fire
• Harmful chemicals and gases
• Bacterial environment
• Mechanical hazards(e.g.; bullets)
• Radiations(e.g.; UV radiations)
Ballistic Protection
Requirements for Ballistic protection
• Minimum weight with maximum personal
mobility.
• Maximum protection.
• Energy absorption characteristics of the
material.
Principle Of Ballistic Protection
Fibres and Fabrics used for
Ballistic Protection
• P-aramid fibres (Kevlar)
• Ultra high modulus polyethylene
• Carbon fibres
• Ceramics
• Spider silk
Common Properties:
• High impact resistance
• Good dynamic energy absorption capacity
• Good chemical resistance
• High specific strength and modulus
• Service life near to 100 years
• Fatigue resistance
• Strain is spread over a much larger area
Types of Armor:
• Soft Armor
• Hard Armor
Characteristics & Manufacturing Methods of
Soft Armor
Characteristics:
For resistance to low velocity bullet
Efficient only for low weight per square meter
Constructed from multiple layers varying b/w 10-50 of woven fabrics sewn together with crosswise weave.
Manufacturing methods:
Multi layers(20-30) stitched together using Kevlar or UHMPE threads.
For High Velocity 10 layers of Kevlar 49 plies for velocity range of 200-900 mps
Inner layer of Kevlar and outer layer composed of Kevlar, spectra shield stitched together.
Characteristics & Manufacturing Methods
Of Hard Armor
Characteristics: For resistance to high velocity bullets
Multi layer fabrics combined together with a resin binder
More efficient at wt.> 10kg/m2.
Less dependence of weave construction.
Manufacturing:
JACKAL STEEL-medium carbon & low chromium molybdenum type steel.
Composites-non-woven fabrics sandwiched b/w woven fabrics.
Single ply produced from 100s of fibre bundles laid side by
side in a beam.
Figure: Spectra shield fabric
Energy Absorption Characteristic Of
Single Layer Kevlar-29 Fabric
All the projectile is absorbed by the fabric armour system upto
the ballistic limit. When projectile velocity exceed the ballistic
limit, the energy absorption capacity of fabric armour system
decreases rapidly.
Ballistic Requirements :
• Low cost
• Light weight
• Comfort
Factors Influencing Performance Of
Fabric :
• Strength
• Modulus
• Elongation at break
• Deformability
• Velocity of transfer of shock wave of fibre.
CONCLUSION :
Safety & protective textiles refer to garment and other fabric
related items designed to protect the wearer from harsh
environmental effects that may result in injury or death.
Defense force on land, sea or air throughout the world is
heavily reliant on protective textiles.
The protective apparel try to combine both the fabric
flexibility, softness, drape, handle & breathability with critical
protective characteristics.
Characteristics, A 19% reduction in causalities is seen if
protective helmets r worn, 40% reduction when armor is worn
& 64% reduction when both armor & helmet are worn.
Reference :
• Textile research journal
• www.fiber to fashion .com
• www.technicaltextile.net/protective-textile
• www.innovationintextiles.com/protective/12jkn22
• www.technotexindia.in/protective-textiles