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Registration Date: Aug. 11, 2014 - Last Updated: Apr. 28, 2015
Business Nature : Trade of Security & Protection category
An innovation of the nation from an expensive defense equipment: Our main weapon system persembahakan work of the nation one of the tactical defense products, non-weapon system of self defense products and protection of a bullet that lurk eruption ourselves particularly lethal area and region of our limbs is chest and head.
Indonesian Military Equipment Factory, Supplier of military equipment Indonesian military-police, anti bullet vest Supplier cheaper in Indonesia Hub Susan: 0852 1081 5321, cheap Bulletproof Vest Distributor in Jakarta, cheap Bulletproof Vest Store in Jakarta, Anti Sajam Jackets cheap in Jakarta, bulletproof helmet cheap in Indonesia, Supplier helmet bulletproof vests in indonesia.Pabrik weapons Indonesia.
How it Works Anti-Bullet Vest
Bulletproof vests have been developed and used in the military to reduce the number of casualties on soldiers or officers who face crossfire. Function is clear, namely to protect the body from bullets or other small projectiles that come out of the firearm. The possibility of early principles of bulletproof vests inspired warrior armor used in medieval times.
At that time, to reduce the incision or puncture wounds caused by swords or even hack darts, the royal knight ( knight) wearing clothes of iron. Unfortunately, with the development of firearms, such protection becomes useful again. Protective clothing is developed to confront a gun that would be known as a bullet proof vest. By type, bullet proof vests can be divided into two, namely soft and hard body armor body armor.
Soft Body Armor
In daily tasks or in a police undercover work prefers a light bullet proof vests. Soft body armor is generally made of Aramid fiber. This material was found in 1964 by Stephanie Kwolek, a chemist an American national, who worked as a researcher at the DuPont company.
Aramid is the abbreviation of the word aromatic polyamide. Aramid has a structure that is strong, tough, has good damping properties, resistant to acids and alkalis, but it can withstand heat up to 370 Â ° C, so it is not flammable. Because it is so, aramid is also used in aircraft, tanks, and rockets. Aramid is marketed products known as Kevlar.
Kevlar has a light weight, but 5 times stronger than steel. A Kevlar layer thickness of less than 1 mm, are generally standard bulletproof vest consists of up to 32 layers and can weigh up to 10 kg.
Hard Body Armor
By adding a layer of soft body armor with specific, hard body armor can be generated. Commonly made of ceramic coating, metal or composite slab. The form is thick and heavy making it uncomfortable to use, to rarely worn in daily tasks. Only in special high-risk tasks, such as military operations or special operations team.
Working Principle Anti-Bullet Vest
The principle works is to reduce as much as possible burst of kinetic energy of bullets, by using layers of kevlar to absorb the energy rate and break it down to a bulletproof vest sectional broad, so that energy is not enough anymore to make a bullet can penetrate bulletproof vests.
Analogues such as the speed of the ball that can be retained by the goal net. Goal nets consist of a series of straps that are connected to each other. If the ball was caught by the net of the goal, then the kinetic energy of the ball will be absorbed by the goal net, which led to increased length of rope around the rope and then the pressure will be streamed to the goalposts.
The rate of energy absorbing bullets, kevlar deformed pressing inward, into the pressure will be forwarded so that the user' s body. Maximum limit into the emphasis should not be more than 44 mm. If the limit is exceeded, the user will experience a bulletproof vest in the wound which would endanger the safety of life.
The notion that users can avoid a bullet proof vest fully from the injury produced by fire is wrong. It should be stressed once again, that the main function of a bullet proof vest just to stop a bullet. So the bullet does not get into the wearer' s body bulletproof vests.
Not infrequently due to the pressure caused last bullet, bulletproof vest wearer will suffer from bruises to broken bones. Obviously injuries also depends on the type of bullet proof vests used. This shows that the term bulletproof vests ( bullet proof vest) is not appropriate, the correct term is a ballistic vest ( ballistic vest) .
Ballistic Vest Level
Standard ballistic vest is the most widely used standard NIJ ( National Institute of Justice) America. Under this standard, a ballistic vest is divided into several levels ( level) , the level I, II-A, II, III-A, III, and IV. Level I is the lowest level, ballistic vests can only withstand small caliber bullet. Details see the picture above. Starting level III ballistic vests will be fitted with iron plates, so it is able to withstand a shotgun.
By using the present material, the higher the level of security provided, it will be thicker and heavier ballistic vests to be worn. This is certainly a shortage of materials. On this basis, the scientists and the military is developing a new material that is lighter and stronger.
Bullet-proof vest is protective clothing to minimize injury because the bullet hit. Usually used by military and police personnel in certain tasks. Material for bullet-proof vests include metal ( steel or titanium) , ceramic or polymer types can provide extra protection against vital parts of the wearer.
This vest protects the wearer by means of curbing the bullet. The bullet was stopped before penetrating into the body. When a vest withstand a bullet penetration, encouragement of bullets reduced by propagate momentum throughout the body. The user will still feel the kinetic energy of the bullet, it can cause bruising, swelling or sores in a fairly serious.
One of the polymers being developed as a modern bullet-proof vest is kevlar. Kevlar also known as Twaron and poly-paraphenylene terephthalamide, is a synthetic fiber that is five times stronger than steel, with the same weight. Kevlar is very resistant to heat and decomposes above 400 Â ° C without melting. Kevlar was invented by the DuPont company in the early 1960s, the work of Stephanie Kwolek. Kevlar is a registered trademark by EI de Pont de Nemours and Company.
The properties
Kevlar is a type of aramid, which consists of a long chain polymer with a parallel orientation. Aramid synthetic fiber itself is a form of long-chain synthetic polyamide with at least 85 percent amidanya connection attached directly to two aromatic chain ( amide group and aromatic group criss-cross) . Kevlar strength obtained from the intra-molecular hydrogen bonding and interaction between piles of aromatic-aromatic sheets. These interactions are stronger than the van der Waals interaction found in other synthetic polymers and fibers like dyneema ( fibers made of polyethylene chains are very long, which is composed of unidirectional) . The presence of salts and certain other impurities, especially calcium, may interfere with the strand interactions and must be eliminated in the production process. Kevlar is made up of molecules which are relatively rigid, which form the structure as flat sheets of silk protein.
From the properties of the obtained fibers with high mechanical strength and resistance to heat.
Kevlar has free groups that can form hydrogen bonds on the outside, so it can absorb water and have the nature of ' wet' good. It also makes it feel more natural and ' sticky' compared to polymers in general, such as polyethylene.
The main drawback of kevlar is able to decompose under alkaline conditions or when exposed to chlorine. Although it can support a large tensile stress, kevlar is not strong enough under compressive stress. To overcome this problem, kevlar often used in conjunction with a strong material to compressive stress.
production
Kevlar is synthesized from monomers 1, 4-fenildiamin ( para-phenylenediamine) and terephthaloyl chloride. The result is a polymeric aromatic amide ( aramid) with alternating benzene rings and amide groups that criss-cross. With this production step, polymer strands are aligned randomly. To make kevlar, materials dissolved and stirred, resulting in oriented polymer chains form fibers.
Kevlar is expensive because of the difficulty in the use of concentrated sulfuric acid production. The extreme conditions required to maintain a high ketaklarutan polymer in solution during synthesis and stirring.
Another bullet-proof materials developed after the kevlar including DSM' s Dyneema, Akzo' s Twaron, Toyobo' s Zylon ( controversial, recent studies have reported, this material is rapidly degraded so that the wearer is not protected as expected) , or Honeywell ' s GoldFlex - all of which are trademarks. New materials is lighter, thinner, and more resistant than Kevlar, but are more expensive.
Process How A Bullet Hit
Before you read How A Bullet Hit The process is further, you should first understand the parts of the bullet. A bullet is composed of several parts of the bullet projectile ( bullet child) , shell casings, gunpowder, and primer. Overall this series is called ammunition. The term " bullet " actually only refers to the part of the ammunition projectiles, or bullets fired child, and not the whole of the ammunition.
Shell casings is a container object that wraps a bullet and consists of a propellant ( usually gunpowder) , rim, and primer. Serves as the originator of the gunpowder explosion that drives the bullet with a kinetic energy projectile. New bullet casings themselves known on the use of modern firearms ammunition.
A shell containing a bullet propellant without using bullets called hollow or empty shells, in which the primary current hit, only to hear the sound of an explosion without a projectile fired by the gun. Hollow bullet is commonly used when the need for sound and flash of a firearm, without a dangerous projectile, such as for military exercises, the movie shooting, and the gun running marker in sports racing. Although it does not contain any child bullets, hollow bullets still dangerous. Hollow bullet can cause death if fired at someone at close distances. Film actor Brandon Lee and Jon-Erik Hexum died from firearm use hollow bullets.
There is one more type of special ammunition that rubber bullets. Rubber bullets is projectiles made of rubber, or rubber coated, which is fired from a firearm. Rubber bullets are used as non-lethal weapons, but still able to penetrate human skin. Rubber bullets can still cause death when used at close range or exposed vital parts such as the head. Rubber bullets, along with plastic bullets, wax, and wood, used during riots or protests. First introduced by the United States government to block the anti-Vietnam war protesters in the 60s.
How to Process A Bullet Hit
Shell casings are airtight and will lock the combustion chamber ammunition from all directions except at the bottom of the sleeve.
When the gun trigger is pulled, the trigger pin hit the primer and the shot will trigger it.
A spark will occur as a result of the blow pin on the primary and will burn gas to gunpowder.
Gas burning of gunpowder push bullet projectile separated from his sleeve.
After the bullet apart, the pressure of the sleeve will be lost to make the casings ejected from the combustion chamber.
The last decade become a safety factor is very coveted thing by all the people of Jakarta.
Jakarta is the most populous city and termajemuk in Indonesia, which is also the city of the most high crime rates, the highest possible not only in Indonesia, but throughout Southeast Asia.
In addition to the high level of kriminilitas, Jakarta is the center of the State government of Indonesia, is also a prime target for terrorist movements, both locally and internasi terrorist-onal to shake the stability and security of the country to the international scale political purposes, which in recent years so the enormity of the city shake.
Case embassy philippines, case Christmas night 2001, Ma-rriot Hotel case, and the last few moments ago that crippled Australian embassy bombing high magnitude that devastated surrounding buildings radius of 500 meters and claimed the lives of the people who have and injuring hundreds of innocent people . Not to mention the bombs that the small scale which is often the case in recent years. Is evidence that the safety factor is so hard to get.
Likewise, street crime, armed robbery, sharp, kam-pack, even robbery with a firearm has a daily menu newspapers capital.
Discovery of 2 containers of various types of smuggling firearms on 12 November 2004 by the Tanjung Priok customs, one proof that Jakarta is also a potential target for beredarnnya illegal firearms, and then where the circulation of weapons? weapons terse-but it is no wonder the crime of armed robbery and has become the trend of crime today.
A sense of lack of safe driving on the streets of Jakarta not only by factors such as the above mentioned crimes alone, but often times we get caught up in school children and a brawl brawl between war-ga, where rocks and other hard objects can be very mengan-cam our safety and our families who were and ter-trap amid the situation.
Hard Work as a Police Community Sector security fortress has proven over was not enough, there still hal2 as above.
Own security measures are the most appropriate prevention need to be done by us.
Understanding Caliber Bullets
IN various media publications, both print and electronic, often we find an error in the mention of caliber bullets, weapons ranging from mild to severe. Because commonness some, writing caliber bullet if ultimately leading to confusion and errors that result in the obscurity of weapons in question.
Understanding caliber bullets, meaning the diameter of the projectile multiplied by the length of the bullet casings, which are usually calculated in millimeter sizes ( generally mainland Europe) and inches ( primarily British and American) . For handguns types of pistols, revolvers, and submachine gun, the most common is a .22 caliber, 9 mm caliber, caliber 7, 65 mm, .45 caliber, .32 caliber, .38 caliber, etc., while the rifle and machine-gun now commonly used is the caliber of 7, 62 mm, 5 caliber, 56 mm, .30 caliber.
Only, this time is often a mistake in writing caliber bullets, especially for the layman, for example, says there are 45 mm caliber pistol bullets, caliber 38 mm. In fact, the numbers are calculated caliber bullet inches in size, is actually the caliber of 0, 45 inches which is written in shorthand international style be .45 ( point 45 shows the abbreviation of 0, 45 inches) if the count is calculated to be 11 mm, 43 mm. .38 Similarly, the actual adalam 0, 38 inches or shortened .38 calculated in millimeters to 9, 6 mm. So it is conceivable, if there are 45-inch caliber bullet has, this means that almost the size of a cannon ball!
The use of .45 caliber bullets themselves, are now rarely used no longer, including the " grandfather' s grandfather " that is America, where they were last used by Colt M1911A1 which was later replaced Beretta M92F ( caliber 9 mm x19) in the early 1990s. Currently, almost all countries use a gun with bullets kalier standard 9 x 19 mm, including the former Soviet Bloc / Russia et al ( previously used 9 mm x 18) and manufacturers from Asia, South America, Africa, etc., although there are still some produce version .45, .44, .40, etc.. Similarly, when referring to the caliber in a matter of millimeters, is also related to some products, because there are some calibers are not the same. For example, caliber 9 mm, for commonly used products are actually three types, namely 9 mm x 19 mm ( also known as 9 mm Parabellum, 9 mm Luger, is the original product of Western Europe, especially Belgium and Germany) , 9 mm x 19 mm ( called also 9 mm Makarov, Russia' s original product) , and 9 mm x 21 mm ( Western European products for civilian handguns) , and 9 mm x 17. As an illustration, a number of small arms factory, both handguns ( pistols and revolvers) or pistol Submachine / sub-machine gun, instead of just producing a product with a standard caliber, but also the number of times that the market share.
Currently the most widely sold in the market and become the standard is 9 mm x 19, in addition to partially use the .45 caliber version or a version .38, .357 and .44 caliber ( for military and police) , to civil caliber usually 7, 65 mm or .32 caliber and .22 caliber. For these types of rifles and machine guns, the production of various countries in the world today tend to busy to use 5, 56 mm x 45 which was popularized through M-16 assault rifle in Vietnam and the FN Minimi machine gun squads Belgium, while the old version 7, 62 mm x 51 is now mostly for special purposes, for example where the snipers are still a reliable product is the M-14 Americans and versatile machine gun FN MAG Belgium ( as well as British and American-made version) and M-60 Americans, who still survive using 7, 62 mm x 39 original Soviet / Russian AK-47 assault rifle ( and the development of products from China, East Germany, North Korea, India, etc.) .
While understanding of the bullet caliber size, for example 5, 56 mm x 45, that is, the projectile has a diameter of 5, 56 mm with a length of cladding 45 mm, 9 mm x 19 means a projectile diameter of 9 mm and 19 mm long kelonsong. While the measurement of inches to the length of the cladding is rarely included.
Examples of small arms caliber bullets are commonly used: a handheld weapon Pistol 9 mm x 19 sample; Beretta M92 Italy ( in America called M-9) , FN Browning; P35 Belgium ( in Indonesia is often called the FN46, PT Pindad
Bandung produces under the name P-1) , the Sig Sauer P228. Switzerland / Germany ( Americans call M-11) , Austrian Glock 17, Walther PPS and HKP7 Germany, Model 77 China, Israel Bul M5 x 18 9 mm Makarov PM / PMM Russian, Polish P-64, 7, 62 x 25, Type 68 ( North Korea) .45 Colt M1911 / 1911A1 ( in Indonesia called FN 45) .357 Revolver Belgian FN Barracuda ( also produced a .38 caliber version of the SPC
and 9 mm x 19) , M73 Manurhin French, German Korth
British Enfield No.2 .38, Colt Detective Special, Colt Police
Service America, America Colt Python.
.44 S & W models 696 Americans
Sub-Machine Gun
9 mm x 19 MP-5 German, Israeli Uzi ( also produced .45) , Beretta M12S ( Indonesia through PT PINDAD produce a civilian version rangers, with the name PM1A1 caliber 9 mm x 21) , MP-40 German, British Sten, Carl Gustav M45 Swedish, MAT-49 France, China Changfeng .45 M1 Thompson USA, Ingram M-10 / M-11 ( also produced caliber 9 mm x 19) , 9 mm x 18 PP-19 Bison ( Russia, produced also cal 9 mm x 19 mm and 7.62 x 25 cal) , CZ 61 ( there is also a version of the 9 mm x 17, and 7, 62 mm x 25)
rifle
5, 45 mm x 39 AK-74
5, 56 mm x 45 Colt M16A1 / A4, M-4 America, G-36 German, Belgian FN FNC,
Belgian FN SCAR, SS-1 and SS-2 PINDAD Indonesia, India Insas,
French FAMAS, L85 / British SA-80, SR-88 Singapore,
South Korea' s K-1, AK-101/ 102 Russian, Austrian Steyr AUG,
Australian F-88, Type 89 Japanese, XM-8 USA / Germany,
Israeli Galil ( also produced caliber 7, 62 mm x 51) , the Israeli Tavor 7, 62 mm x 51 M-14 America, G-3 German, Italian Beretta BM-59, SP-1 PT Pindad Indonesia 7, 62 mm x 39 Russian AK-47, SKS Russian, Chinese Type 56, 5 machine guns, 45 mm x 39 RPK-74 Rusia5, 56 mm x 45 Belgian FN Minimi ( and product development in the United States, Israel, etc.) , Ultimax-100 Singapore, 7 , 62 mm x 51 FN MAG Belgium ( and product development in the UK, USA, Indonesia, etc.) , MG-3 Jerman7, 62 mm x 39 RPK and FN Browning M2HB .50, XM-32 America, CIS .50 Singapore. * *
Note: All of our products circulate throughout Indonesia and the world has passed the test of the Army R & D-Batujajar, Bandung-WEST JAVA.
Our artificial bulletproof helmet has been used by Indonesian peacekeepers to the country of Laos, Angkor, Congo etc and have passed the standard test used by the United Nations through the UN forces ( United Nations)
For info and reservations:
Call or SMS:
Jayanti
Hp: 0878 1676 9110/ 0813 5006 3790
office: 0511 6821599
Ym Id: cs4borneo
Email: gudangalatmiliterkalimantan@ gmail.com
Skype: cs4borneo
Business Nature : Trade of Security & Protection category
Company Contact
| Name: | Ms. Zahra |
|---|---|
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| Mobile Number: | |
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| Address: | Banjarmasin, Kalimantan Selatan Indonesia  |
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Company Brief
Indonesian Military Equipment Factory, Supplier of military equipment Indonesian military-police, anti bullet vest Supplier cheaper in Indonesia Hub Zahra 08115121599, cheap Bulletproof Vest Distributor in Borneo, Bulletproof Vests Shop cheap in Borneo, Anti Sajam Jackets cheap in Indonesia, plant bulletproof vests cheap in Indonesia, cheap bulletproof helmet factory in Indonesia, riot clothing factory cheap, factory riot police uniforms cheap.An innovation of the nation from an expensive defense equipment: Our main weapon system persembahakan work of the nation one of the tactical defense products, non-weapon system of self defense products and protection of a bullet that lurk eruption ourselves particularly lethal area and region of our limbs is chest and head.
Indonesian Military Equipment Factory, Supplier of military equipment Indonesian military-police, anti bullet vest Supplier cheaper in Indonesia Hub Susan: 0852 1081 5321, cheap Bulletproof Vest Distributor in Jakarta, cheap Bulletproof Vest Store in Jakarta, Anti Sajam Jackets cheap in Jakarta, bulletproof helmet cheap in Indonesia, Supplier helmet bulletproof vests in indonesia.Pabrik weapons Indonesia.
How it Works Anti-Bullet Vest
Bulletproof vests have been developed and used in the military to reduce the number of casualties on soldiers or officers who face crossfire. Function is clear, namely to protect the body from bullets or other small projectiles that come out of the firearm. The possibility of early principles of bulletproof vests inspired warrior armor used in medieval times.
At that time, to reduce the incision or puncture wounds caused by swords or even hack darts, the royal knight ( knight) wearing clothes of iron. Unfortunately, with the development of firearms, such protection becomes useful again. Protective clothing is developed to confront a gun that would be known as a bullet proof vest. By type, bullet proof vests can be divided into two, namely soft and hard body armor body armor.
Soft Body Armor
In daily tasks or in a police undercover work prefers a light bullet proof vests. Soft body armor is generally made of Aramid fiber. This material was found in 1964 by Stephanie Kwolek, a chemist an American national, who worked as a researcher at the DuPont company.
Aramid is the abbreviation of the word aromatic polyamide. Aramid has a structure that is strong, tough, has good damping properties, resistant to acids and alkalis, but it can withstand heat up to 370 Â ° C, so it is not flammable. Because it is so, aramid is also used in aircraft, tanks, and rockets. Aramid is marketed products known as Kevlar.
Kevlar has a light weight, but 5 times stronger than steel. A Kevlar layer thickness of less than 1 mm, are generally standard bulletproof vest consists of up to 32 layers and can weigh up to 10 kg.
Hard Body Armor
By adding a layer of soft body armor with specific, hard body armor can be generated. Commonly made of ceramic coating, metal or composite slab. The form is thick and heavy making it uncomfortable to use, to rarely worn in daily tasks. Only in special high-risk tasks, such as military operations or special operations team.
Working Principle Anti-Bullet Vest
The principle works is to reduce as much as possible burst of kinetic energy of bullets, by using layers of kevlar to absorb the energy rate and break it down to a bulletproof vest sectional broad, so that energy is not enough anymore to make a bullet can penetrate bulletproof vests.
Analogues such as the speed of the ball that can be retained by the goal net. Goal nets consist of a series of straps that are connected to each other. If the ball was caught by the net of the goal, then the kinetic energy of the ball will be absorbed by the goal net, which led to increased length of rope around the rope and then the pressure will be streamed to the goalposts.
The rate of energy absorbing bullets, kevlar deformed pressing inward, into the pressure will be forwarded so that the user' s body. Maximum limit into the emphasis should not be more than 44 mm. If the limit is exceeded, the user will experience a bulletproof vest in the wound which would endanger the safety of life.
The notion that users can avoid a bullet proof vest fully from the injury produced by fire is wrong. It should be stressed once again, that the main function of a bullet proof vest just to stop a bullet. So the bullet does not get into the wearer' s body bulletproof vests.
Not infrequently due to the pressure caused last bullet, bulletproof vest wearer will suffer from bruises to broken bones. Obviously injuries also depends on the type of bullet proof vests used. This shows that the term bulletproof vests ( bullet proof vest) is not appropriate, the correct term is a ballistic vest ( ballistic vest) .
Ballistic Vest Level
Standard ballistic vest is the most widely used standard NIJ ( National Institute of Justice) America. Under this standard, a ballistic vest is divided into several levels ( level) , the level I, II-A, II, III-A, III, and IV. Level I is the lowest level, ballistic vests can only withstand small caliber bullet. Details see the picture above. Starting level III ballistic vests will be fitted with iron plates, so it is able to withstand a shotgun.
By using the present material, the higher the level of security provided, it will be thicker and heavier ballistic vests to be worn. This is certainly a shortage of materials. On this basis, the scientists and the military is developing a new material that is lighter and stronger.
Bullet-proof vest is protective clothing to minimize injury because the bullet hit. Usually used by military and police personnel in certain tasks. Material for bullet-proof vests include metal ( steel or titanium) , ceramic or polymer types can provide extra protection against vital parts of the wearer.
This vest protects the wearer by means of curbing the bullet. The bullet was stopped before penetrating into the body. When a vest withstand a bullet penetration, encouragement of bullets reduced by propagate momentum throughout the body. The user will still feel the kinetic energy of the bullet, it can cause bruising, swelling or sores in a fairly serious.
One of the polymers being developed as a modern bullet-proof vest is kevlar. Kevlar also known as Twaron and poly-paraphenylene terephthalamide, is a synthetic fiber that is five times stronger than steel, with the same weight. Kevlar is very resistant to heat and decomposes above 400 Â ° C without melting. Kevlar was invented by the DuPont company in the early 1960s, the work of Stephanie Kwolek. Kevlar is a registered trademark by EI de Pont de Nemours and Company.
The properties
Kevlar is a type of aramid, which consists of a long chain polymer with a parallel orientation. Aramid synthetic fiber itself is a form of long-chain synthetic polyamide with at least 85 percent amidanya connection attached directly to two aromatic chain ( amide group and aromatic group criss-cross) . Kevlar strength obtained from the intra-molecular hydrogen bonding and interaction between piles of aromatic-aromatic sheets. These interactions are stronger than the van der Waals interaction found in other synthetic polymers and fibers like dyneema ( fibers made of polyethylene chains are very long, which is composed of unidirectional) . The presence of salts and certain other impurities, especially calcium, may interfere with the strand interactions and must be eliminated in the production process. Kevlar is made up of molecules which are relatively rigid, which form the structure as flat sheets of silk protein.
From the properties of the obtained fibers with high mechanical strength and resistance to heat.
Kevlar has free groups that can form hydrogen bonds on the outside, so it can absorb water and have the nature of ' wet' good. It also makes it feel more natural and ' sticky' compared to polymers in general, such as polyethylene.
The main drawback of kevlar is able to decompose under alkaline conditions or when exposed to chlorine. Although it can support a large tensile stress, kevlar is not strong enough under compressive stress. To overcome this problem, kevlar often used in conjunction with a strong material to compressive stress.
production
Kevlar is synthesized from monomers 1, 4-fenildiamin ( para-phenylenediamine) and terephthaloyl chloride. The result is a polymeric aromatic amide ( aramid) with alternating benzene rings and amide groups that criss-cross. With this production step, polymer strands are aligned randomly. To make kevlar, materials dissolved and stirred, resulting in oriented polymer chains form fibers.
Kevlar is expensive because of the difficulty in the use of concentrated sulfuric acid production. The extreme conditions required to maintain a high ketaklarutan polymer in solution during synthesis and stirring.
Another bullet-proof materials developed after the kevlar including DSM' s Dyneema, Akzo' s Twaron, Toyobo' s Zylon ( controversial, recent studies have reported, this material is rapidly degraded so that the wearer is not protected as expected) , or Honeywell ' s GoldFlex - all of which are trademarks. New materials is lighter, thinner, and more resistant than Kevlar, but are more expensive.
Process How A Bullet Hit
Before you read How A Bullet Hit The process is further, you should first understand the parts of the bullet. A bullet is composed of several parts of the bullet projectile ( bullet child) , shell casings, gunpowder, and primer. Overall this series is called ammunition. The term " bullet " actually only refers to the part of the ammunition projectiles, or bullets fired child, and not the whole of the ammunition.
Shell casings is a container object that wraps a bullet and consists of a propellant ( usually gunpowder) , rim, and primer. Serves as the originator of the gunpowder explosion that drives the bullet with a kinetic energy projectile. New bullet casings themselves known on the use of modern firearms ammunition.
A shell containing a bullet propellant without using bullets called hollow or empty shells, in which the primary current hit, only to hear the sound of an explosion without a projectile fired by the gun. Hollow bullet is commonly used when the need for sound and flash of a firearm, without a dangerous projectile, such as for military exercises, the movie shooting, and the gun running marker in sports racing. Although it does not contain any child bullets, hollow bullets still dangerous. Hollow bullet can cause death if fired at someone at close distances. Film actor Brandon Lee and Jon-Erik Hexum died from firearm use hollow bullets.
There is one more type of special ammunition that rubber bullets. Rubber bullets is projectiles made of rubber, or rubber coated, which is fired from a firearm. Rubber bullets are used as non-lethal weapons, but still able to penetrate human skin. Rubber bullets can still cause death when used at close range or exposed vital parts such as the head. Rubber bullets, along with plastic bullets, wax, and wood, used during riots or protests. First introduced by the United States government to block the anti-Vietnam war protesters in the 60s.
How to Process A Bullet Hit
Shell casings are airtight and will lock the combustion chamber ammunition from all directions except at the bottom of the sleeve.
When the gun trigger is pulled, the trigger pin hit the primer and the shot will trigger it.
A spark will occur as a result of the blow pin on the primary and will burn gas to gunpowder.
Gas burning of gunpowder push bullet projectile separated from his sleeve.
After the bullet apart, the pressure of the sleeve will be lost to make the casings ejected from the combustion chamber.
The last decade become a safety factor is very coveted thing by all the people of Jakarta.
Jakarta is the most populous city and termajemuk in Indonesia, which is also the city of the most high crime rates, the highest possible not only in Indonesia, but throughout Southeast Asia.
In addition to the high level of kriminilitas, Jakarta is the center of the State government of Indonesia, is also a prime target for terrorist movements, both locally and internasi terrorist-onal to shake the stability and security of the country to the international scale political purposes, which in recent years so the enormity of the city shake.
Case embassy philippines, case Christmas night 2001, Ma-rriot Hotel case, and the last few moments ago that crippled Australian embassy bombing high magnitude that devastated surrounding buildings radius of 500 meters and claimed the lives of the people who have and injuring hundreds of innocent people . Not to mention the bombs that the small scale which is often the case in recent years. Is evidence that the safety factor is so hard to get.
Likewise, street crime, armed robbery, sharp, kam-pack, even robbery with a firearm has a daily menu newspapers capital.
Discovery of 2 containers of various types of smuggling firearms on 12 November 2004 by the Tanjung Priok customs, one proof that Jakarta is also a potential target for beredarnnya illegal firearms, and then where the circulation of weapons? weapons terse-but it is no wonder the crime of armed robbery and has become the trend of crime today.
A sense of lack of safe driving on the streets of Jakarta not only by factors such as the above mentioned crimes alone, but often times we get caught up in school children and a brawl brawl between war-ga, where rocks and other hard objects can be very mengan-cam our safety and our families who were and ter-trap amid the situation.
Hard Work as a Police Community Sector security fortress has proven over was not enough, there still hal2 as above.
Own security measures are the most appropriate prevention need to be done by us.
Understanding Caliber Bullets
IN various media publications, both print and electronic, often we find an error in the mention of caliber bullets, weapons ranging from mild to severe. Because commonness some, writing caliber bullet if ultimately leading to confusion and errors that result in the obscurity of weapons in question.
Understanding caliber bullets, meaning the diameter of the projectile multiplied by the length of the bullet casings, which are usually calculated in millimeter sizes ( generally mainland Europe) and inches ( primarily British and American) . For handguns types of pistols, revolvers, and submachine gun, the most common is a .22 caliber, 9 mm caliber, caliber 7, 65 mm, .45 caliber, .32 caliber, .38 caliber, etc., while the rifle and machine-gun now commonly used is the caliber of 7, 62 mm, 5 caliber, 56 mm, .30 caliber.
Only, this time is often a mistake in writing caliber bullets, especially for the layman, for example, says there are 45 mm caliber pistol bullets, caliber 38 mm. In fact, the numbers are calculated caliber bullet inches in size, is actually the caliber of 0, 45 inches which is written in shorthand international style be .45 ( point 45 shows the abbreviation of 0, 45 inches) if the count is calculated to be 11 mm, 43 mm. .38 Similarly, the actual adalam 0, 38 inches or shortened .38 calculated in millimeters to 9, 6 mm. So it is conceivable, if there are 45-inch caliber bullet has, this means that almost the size of a cannon ball!
The use of .45 caliber bullets themselves, are now rarely used no longer, including the " grandfather' s grandfather " that is America, where they were last used by Colt M1911A1 which was later replaced Beretta M92F ( caliber 9 mm x19) in the early 1990s. Currently, almost all countries use a gun with bullets kalier standard 9 x 19 mm, including the former Soviet Bloc / Russia et al ( previously used 9 mm x 18) and manufacturers from Asia, South America, Africa, etc., although there are still some produce version .45, .44, .40, etc.. Similarly, when referring to the caliber in a matter of millimeters, is also related to some products, because there are some calibers are not the same. For example, caliber 9 mm, for commonly used products are actually three types, namely 9 mm x 19 mm ( also known as 9 mm Parabellum, 9 mm Luger, is the original product of Western Europe, especially Belgium and Germany) , 9 mm x 19 mm ( called also 9 mm Makarov, Russia' s original product) , and 9 mm x 21 mm ( Western European products for civilian handguns) , and 9 mm x 17. As an illustration, a number of small arms factory, both handguns ( pistols and revolvers) or pistol Submachine / sub-machine gun, instead of just producing a product with a standard caliber, but also the number of times that the market share.
Currently the most widely sold in the market and become the standard is 9 mm x 19, in addition to partially use the .45 caliber version or a version .38, .357 and .44 caliber ( for military and police) , to civil caliber usually 7, 65 mm or .32 caliber and .22 caliber. For these types of rifles and machine guns, the production of various countries in the world today tend to busy to use 5, 56 mm x 45 which was popularized through M-16 assault rifle in Vietnam and the FN Minimi machine gun squads Belgium, while the old version 7, 62 mm x 51 is now mostly for special purposes, for example where the snipers are still a reliable product is the M-14 Americans and versatile machine gun FN MAG Belgium ( as well as British and American-made version) and M-60 Americans, who still survive using 7, 62 mm x 39 original Soviet / Russian AK-47 assault rifle ( and the development of products from China, East Germany, North Korea, India, etc.) .
While understanding of the bullet caliber size, for example 5, 56 mm x 45, that is, the projectile has a diameter of 5, 56 mm with a length of cladding 45 mm, 9 mm x 19 means a projectile diameter of 9 mm and 19 mm long kelonsong. While the measurement of inches to the length of the cladding is rarely included.
Examples of small arms caliber bullets are commonly used: a handheld weapon Pistol 9 mm x 19 sample; Beretta M92 Italy ( in America called M-9) , FN Browning; P35 Belgium ( in Indonesia is often called the FN46, PT Pindad
Bandung produces under the name P-1) , the Sig Sauer P228. Switzerland / Germany ( Americans call M-11) , Austrian Glock 17, Walther PPS and HKP7 Germany, Model 77 China, Israel Bul M5 x 18 9 mm Makarov PM / PMM Russian, Polish P-64, 7, 62 x 25, Type 68 ( North Korea) .45 Colt M1911 / 1911A1 ( in Indonesia called FN 45) .357 Revolver Belgian FN Barracuda ( also produced a .38 caliber version of the SPC
and 9 mm x 19) , M73 Manurhin French, German Korth
British Enfield No.2 .38, Colt Detective Special, Colt Police
Service America, America Colt Python.
.44 S & W models 696 Americans
Sub-Machine Gun
9 mm x 19 MP-5 German, Israeli Uzi ( also produced .45) , Beretta M12S ( Indonesia through PT PINDAD produce a civilian version rangers, with the name PM1A1 caliber 9 mm x 21) , MP-40 German, British Sten, Carl Gustav M45 Swedish, MAT-49 France, China Changfeng .45 M1 Thompson USA, Ingram M-10 / M-11 ( also produced caliber 9 mm x 19) , 9 mm x 18 PP-19 Bison ( Russia, produced also cal 9 mm x 19 mm and 7.62 x 25 cal) , CZ 61 ( there is also a version of the 9 mm x 17, and 7, 62 mm x 25)
rifle
5, 45 mm x 39 AK-74
5, 56 mm x 45 Colt M16A1 / A4, M-4 America, G-36 German, Belgian FN FNC,
Belgian FN SCAR, SS-1 and SS-2 PINDAD Indonesia, India Insas,
French FAMAS, L85 / British SA-80, SR-88 Singapore,
South Korea' s K-1, AK-101/ 102 Russian, Austrian Steyr AUG,
Australian F-88, Type 89 Japanese, XM-8 USA / Germany,
Israeli Galil ( also produced caliber 7, 62 mm x 51) , the Israeli Tavor 7, 62 mm x 51 M-14 America, G-3 German, Italian Beretta BM-59, SP-1 PT Pindad Indonesia 7, 62 mm x 39 Russian AK-47, SKS Russian, Chinese Type 56, 5 machine guns, 45 mm x 39 RPK-74 Rusia5, 56 mm x 45 Belgian FN Minimi ( and product development in the United States, Israel, etc.) , Ultimax-100 Singapore, 7 , 62 mm x 51 FN MAG Belgium ( and product development in the UK, USA, Indonesia, etc.) , MG-3 Jerman7, 62 mm x 39 RPK and FN Browning M2HB .50, XM-32 America, CIS .50 Singapore. * *
Note: All of our products circulate throughout Indonesia and the world has passed the test of the Army R & D-Batujajar, Bandung-WEST JAVA.
Our artificial bulletproof helmet has been used by Indonesian peacekeepers to the country of Laos, Angkor, Congo etc and have passed the standard test used by the United Nations through the UN forces ( United Nations)
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