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ZhZT-71
ZhZT-71 (Russian: ЖЗТ-71, Жилет Защитный Титановый обр. 1971 года; Vest Protective Titanium mod. 1971) was a Soviet ballistic vest created for the MVD. It was a first ballistic vest designed for law enforcement. Design decisions made during development of its modification, ZhZT-71M, were later used in designing of 6B2 ballistic vest. History ZhZT-71 was developed in 1971 by NII Stali, on instructions from the technical department of the USSR Ministry of Internal Affairs. In that version of the body armor, plates were used from the most effective material at that time - OT4-1 titanium alloy. ZhZT-71 weighed up to 12 kg. In 1974, NII Stali started development of ZhZT-71M, a version that addressed several issues at once (like plates drifting inside the vest and being offset overtime). It also had a new dampener layer 30 mm thick on the chest, and 10 on the back, made out of foam rubber Polyurethane. Weight increased to over 10 kg, due to thicker 3.3 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
6B2 Ballistic Vest
6B2 (Russian: 6Б2) is a Soviet ballistic vest. It is the first serial mass issued body armor of the Soviet Armed Forces, designed on the eve of Soviet-Afghan war. It was introduced into service in 1981. Use of this vest decreased losses of Soviet troops and it became the basis for the further development of domestic personal protective equipment. History The 6B2 (Zh-81) body armor was developed by the beginning of 1980 as a personal initiative by Yuri Germanovich Ivliev, an employee of the NII Stali. The first sample was presented on February 10, 1980 at a closed meeting of the CPSU Central Committee. Based on the results of the meeting, it was decided to develop technical documentation within two and a half months and release an initial batch of the product. Production of body armor was established at the Zlatoust garment factory. During the manufacturing process, the created version of the body armor was quickly improved. The vest was introduced into service in 1981. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Foam Rubber
Foam rubber (also known as cellular rubber, sponge rubber, or expanded rubber) is rubber that has been made with a foaming agent so that its structure is an air-filled matrix. Commercial foam rubber is generally made of synthetic rubber, natural latex, or polyurethane. Latex foam rubber, used in mattresses, is well known for its endurance. Polyurethane is a thermosetting polymer that comes from combination of methyl di-isocyanate and polyethylene and some chemical additives. Manufacturing history Foam rubber was first made in 1929, by Edward A. Murphy (chemist), E. A. Murphy and Eric Owen, two research chemists at Dunlop Rubber, who used whipped latex. In 1937, isocyanate-based materials were first used to make foam rubber. After World War II, styrene-butadiene rubber replaced many natural types of foam. Foam rubber has been used commercially for a wide range of applications since the 1940s. Polyether polyurethane rubber was discovered and patented in the 1950s, by Charles C. Pri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nylon 6
Nylon 6 or polycaprolactam is a polymer, in particular semicrystalline polyamide. Unlike most other nylons, nylon 6 is not a condensation polymer, but instead is formed by ring-opening polymerization; this makes it a special case in the comparison between condensation and addition polymers. Its competition with nylon 66 and the example it set have also shaped the economics of the synthetic fibre industry. It is sold under numerous trade names including Perlon (Germany), Dederon (former East Germany), Nylatron, Capron, Ultramid, Akulon, Kapron (former Soviet Union and satellite states), Rugopa (Turkey) and Durethan. History Polycaprolactam was developed by Paul Schlack at IG Farben in late 1930s (first synthesized in 1938) to reproduce the properties of Nylon 66 without violating the patent on its production. (Around the same time, Kohei Hoshino at Toray also succeeded in synthesizing nylon 6.) It was marketed as Perlon, and industrial production with a capacity of 3,500 tons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rivet
A rivet is a permanent mechanical fastener. Before being installed, a rivet consists of a smooth cylinder (geometry), cylindrical shaft with a head on one end. The end opposite the head is called the ''tail''. On installation, the deformed end is called the ''shop head'' or buck-tail. Because there is effectively a head on each end of an installed rivet, it can support Tension (physics), tension loads. However, it is much more capable of supporting Shear force, shear loads (loads perpendicular to the axis of the shaft). Fastenings used in traditional wooden boat building, such as copper nails and clinch bolts, work on the same principle as the rivet but were in use long before the term ''rivet'' was introduced and, where they are remembered, are usually classified among nails and bolts respectively. History Solid rivets are one of the oldest and most reliable types of fasteners, having been found in archeology, archaeological findings dating back to the Bronze Age. Rivet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alpha Group
Spetsgruppa "A", also known as Alpha Group, officially Directorate "A" of FSB Special Purpose Center (Russian: Спецназ ФСБ "Альфа"), is a sub-unit of Russian special forces within the Russian Special Forces Center of the Federal Security Service (FSB). It was created by the Soviet KGB in 1974. Although little is known about the exact nature of its primary directives, it is speculated that the unit is authorised to act under the direct control and sanction of Russia's top political leadership, similar to its sister unit, the Directorate "V" ( Vympel), which is officially tasked with protecting Russia's strategic installations, as well as conducting black operations inside and outside Russia. It is also available for extended police duties, for paramilitary operations, and for covert operations, both domestically and internationally. In the Soviet Union Creation and organization On 28 July 1974, Alpha Group was created on the orders of the KGB Chairman, Yuri And ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aluminium
Aluminium (or aluminum in North American English) is a chemical element; it has chemical symbol, symbol Al and atomic number 13. It has a density lower than that of other common metals, about one-third that of steel. Aluminium has a great affinity towards oxygen, passivation (chemistry), forming a protective layer of aluminium oxide, oxide on the surface when exposed to air. It visually resembles silver, both in its color and in its great ability to reflect light. It is soft, magnetism, nonmagnetic, and ductility, ductile. It has one stable isotope, 27Al, which is highly abundant, making aluminium the abundance of the chemical elements, 12th-most abundant element in the universe. The radioactive decay, radioactivity of aluminium-26, 26Al leads to it being used in radiometric dating. Chemically, aluminium is a post-transition metal in the boron group; as is common for the group, aluminium forms compounds primarily in the +3 oxidation state. The aluminium cation Al3+ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyurethane
Polyurethane (; often abbreviated PUR and PU) is a class of polymers composed of organic chemistry, organic units joined by carbamate (urethane) links. In contrast to other common polymers such as polyethylene and polystyrene, polyurethane term does not refer to the single type of polymer but a group of polymers. Unlike polyethylene and polystyrene, polyurethanes can be produced from a wide range of starting materials resulting in various polymers within the same group. This chemical variety produces polyurethanes with different chemical structures leading to many List of polyurethane applications, different applications. These include rigid and flexible foams, and coatings, adhesives, Potting (electronics), electrical potting compounds, and fibers such as spandex and polyurethane laminate (PUL). Foams are the largest application accounting for 67% of all polyurethane produced in 2016. A polyurethane is typically produced by reacting a polymeric isocyanate with a polyol. Since a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scientific Research Institute Of Steel
The Scientific Research Institute of Steel (), also known as NII Stali (), is a Russian research institute (NII) located in the capital city of Moscow. The institute occupies an area of 64,000 m2, including production areas of 40,000 m2. It is organized as a joint-stock company A joint-stock company (JSC) is a business entity in which shares of the company's stock can be bought and sold by shareholders. Each shareholder owns company stock in proportion, evidenced by their shares (certificates of ownership). Shareho ... and was founded in 1942. The company is known for its military products, including tank armor and military helmets. Since 2023, it also produces anti-fragmentation blankets. External links * «Калашников» начал серийное производство титановых бронешлемов «Эльбрус-Т» (in Russian)«Калашников»: «Эгида-У» от НИИ Стали защищает от осколков на 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Titanium Alloys
Titanium alloys are alloys that contain a mixture of titanium and other chemical elements. Such alloys have very high tensile strength and toughness (even at extreme temperatures). They are light in weight, have extraordinary corrosion resistance and the ability to withstand extreme temperatures. However, the high cost of Titanium#Production, processing limits their use to military applications, aircraft, spacecraft, bicycles, medical devices, jewelry, highly stressed components such as connecting rods on expensive sports cars and some premium sports equipment and consumer electronics. Although "commercially pure" titanium has acceptable mechanical properties and has been used for orthopedics, orthopedic and dental implants, for most applications titanium is alloyed with small amounts of aluminium and vanadium, typically 6% and 4% respectively, by weight. This mixture has a solid solubility which varies dramatically with temperature, allowing it to undergo precipitation strengtheni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ballistic Vest
A bulletproof vest, also known as a ballistic vest or bullet-resistant vest, is a type of body armor designed to absorb impact and prevent the penetration of firearm projectiles and Fragmentation (weaponry), explosion fragments to the torso. The vest can be either soft—as worn by police officers, security personnel, prison guards, and occasionally private citizens to protect against stabbing attacks or light projectiles—or hard, incorporating metallic or para-aramid components. Soldiers and police tactical units typically wear hard armour, either alone or combined with soft armour, to protect against rifle ammunition or fragmentation. Additional protection includes trauma plates for blunt force and ceramic inserts for high-caliber rounds. Bulletproof vests have evolved over centuries, from early designs like those made for knights and military leaders to modern-day versions. Early ballistic protection used materials like cotton and silk, while contemporary vests employ advance ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Russian Language
Russian is an East Slavic languages, East Slavic language belonging to the Balto-Slavic languages, Balto-Slavic branch of the Indo-European languages, Indo-European language family. It is one of the four extant East Slavic languages, and is the native language of the Russians. It was the ''de facto'' and ''de jure'' De facto#National languages, official language of the former Soviet Union.1977 Soviet Constitution, Constitution and Fundamental Law of the Union of Soviet Socialist Republics, 1977: Section II, Chapter 6, Article 36 Russian has remained an official language of the Russia, Russian Federation, Belarus, Kazakhstan, Kyrgyzstan, and Tajikistan, and is still commonly used as a lingua franca in Ukraine, Moldova, the Caucasus, Central Asia, and to a lesser extent in the Baltic states and Russian language in Israel, Israel. Russian has over 253 million total speakers worldwide. It is the List of languages by number of speakers in Europe, most spoken native language in Eur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
