By: Azman Zakaria
Photo by: Noor Azreen Awang
Dr. Mohammad Jawaid showing the bulletproof jacket, ‘Techno Economic Hard Body Armour.
SERDANG: Researchers from Universiti Putra Malaysia (UPM) have successfully produced bulletproof multi-layered armour (MA) vest, using the skin layer of coconut sheath or cocos nucifera sheath (CNS), as a replacement for Kevlar fabric on the bulletproof armour vest, without compromising its ballistic performance.
Bulletproof multi-layered armour (MA) vest, made from skin layer of coconut sheath or cocos nucifera sheath.
The innovation, named Techno-Economic Hard Body Armour, is placed in the jacket as a bulletproof vest. It meets the requirements of the National Institute of Justice (NIJ) level III standard.
A ballistic test was performed using a 7.62mm calibre bullet as a high kinetic energy projectile from 15m distance and fired at the velocity of 838±15m/s. The test was conducted at the Science & Technology Research Institute for Defence (STRIDE), Selangor.
The research group leader, Dr. Mohammad Jawaid, said the result showed that the depth of blunt trauma measurement of the CNS-based multi-layered bulletproof vest was at 26.51mm, which was relatively lower than the maximum allowable blunt trauma limit of 44mm according to the NIJ standard.
Dr Mohammad Jawaid, Senior Research Fellow (Professor) at Laboratory of Biocomposite Technology, Institute of Tropical Forestry and Forest Products (INTROP), UPM, said the vest could also save about 44% of the fabrication costs compared to Kevlar-based MA.
Dr. Mohammad Jawaid wearing the bulletproof jacket.
Dr. Mohammad Jawaid
He said that the composition of MA was generally made up of ceramics (SiC), composites (Kevlar /epoxy) and metals (Al).
However, he said, a major impediment of using aramid fabrics-based composites or Kevlar as a second layer in the MA was its cost and environment pollution.
"Due to its non-biodegradable nature, it may pollute the environment and affect the eco-system, and because aramid fabrics are generally more expensive, the overall cost of manufacturing MA is increased," he said.
He added that a monolithic bullet proof vest made from aramid or steel fabrics required a large level of thickness, which could affect the movement and comfort of the wearer.
Cocos nucifera sheath, material for the multi-layered armour (MA) vest.
As such, he said, the research he was undertaking aimed to replace the aramid fabric/Kevlar with an eco-friendly and easily available natural material (cocos nucifera sheath/epoxy composite) without compromising its ballistic performance.
He said Techno-Economic Hard Body Armour was made using eight pieces of MA; four pieces were placed in the front and another four were placed at the back of the jacket to make it a bullet proof vest.
The weight of Techno-Economic Hard Body Armor is about 5 kg.
Other members in the research group are PhD student Jesu arockiam Naveen, Assoc. Prof. Dr. Edi Syams Zainudin and Prof. Ir. Ts. Dr. Mohamed Thariq Hameed Sultan (all from UPM), and Dr. Ridwan Yahaya from STRIDE. – UPM
Date of Input: 18/08/2020 | Updated: 18/08/2020 | hairul_nizam
43400 UPM Serdang
Selangor Darul Ehsan