Kevlar is also known as poly(p-phenyleneterephtalamide). It is a polyamide
Today the terms are used interchangeably, but flack jackets were not always considered bullet proof. The original flak jackets were just nylon vests with steel plates, but would not necessarily stop a bullet. Now they are the same thing.
Kevlar was the principal fibre into the 1970s. There are several new ones, including Dyneema, Gold Flex and Spectra. For more information please see the wikipedia article about bullet proof vests.
Water repelling ability is the top priority for fabrics intended for making rain jackets, eVent and silnylon are often used for making rain jackets because of their water repelling properties.
There is currently no bulletproof laptop case,although there are bulletproof laptops used by the military.
The primary material used in bulletproof vests is Kevlar in several layers. There are many types of bulletproof vests, many of which include special inserts. The actual construction of bulletproof vests and other bulletproof clothing (they make bulletproof suit coats even!) is not really different than making other clothing items, but they adhere to a higher level of quality during construction.
High-performance fibers such as aramid (e.g. Kevlar) and polyethylene (e.g. Dyneema) are commonly used in making bulletproof vests due to their high strength and ability to absorb and disperse impact energy effectively. These fibers provide protection by stopping and spreading the force of a bullet, reducing the likelihood of penetration.
Copper is not bulletproof. While copper is a durable metal used in many applications, it is not typically used to manufacture bulletproof materials. Materials like Kevlar, steel, and ceramic are commonly used to create bulletproof protection.
Compound semiconductors have very low lifetime of charge carriers and hence they are not used for making Transistors and ICs.Rather it is used for making LEDs and LASER diodes.So the compound semiconductors are called photo-diodes. -M.R
Gold is not typically used in bulletproof vests due to its high cost. Nickel is also not commonly used as it does not provide the necessary strength and ballistic protection required for bulletproof vests. Instead, materials like Kevlar, Spectra, and Dyneema are commonly used for their high strength and flexibility.
ballsacks
this method is used for making the compound in gel form
Silver iodide (AgI).