?Product definition and concept:
Anti-stab clothing is also called anti-stab vest, anti-knife clothing, anti-blade clothing or anti-blade clothing. It has the functions of anti-cutting, anti-cutting, anti-stabbing, anti-scratching of angular objects, wear resistance, and anti-theft.
The anti-stab suit is individual armor, also known as human armor. It is an anti-cut suit made of ultra-high-strength fiber fabric. It has anti-cutting, anti-cutting, anti-stab, wear-resistant, anti-scratch and anti-sharp objects. Theft function, also known as anti-knife clothes and anti-blade clothes. The anti-stab suit can effectively resist the attacks of common sharp objects such as daggers on the human body from various angles, so that the protected parts are not stab wounded. It can protect the wearer from cuts, scratches, scratches, cuts when worn or cut with sharp knives, sharp blades, sharp objects, cuts, cuts, scrapes, rubs, and scratches. It is mainly equipped with public security and labor camps such as police officers and prison guards, and is also used for security and taxi drivers.
The fiber raw materials used in stab-resistant clothing require high shear strength, impact resistance and high modulus, so special high-performance fibers are required. At present, the most common are ultra-high molecular weight polyethylene fiber (UHMWPE), aramid fiber, para-aramid fiber (Kevlar) and polyparaphenylene benzobisoxazole fiber (PBO), in addition, polyparaphenylene Butylene dicarboxylate (PBT), ceramic fiber, carbon fiber, polyester fiber, artificial spider silk, etc. have also been used.
Product basic features:
In addition to having a protective function, the stab-resistant clothing also has requirements on the overall quality and thickness of the product. For example, the PSDB standard clearly proposes to protect the human body from sharp objects such as bayonet daggers, while ensuring that the wearer's activities are not very Big restrictions. Therefore, in the development of anti-stab clothing, people have been committed to the pursuit of light weight. At present, the main technologies used are: gasket metal sheets, travellers; high-count high-density weaving; coating; ceramic sheet composite.
In the development of stab-resistant clothing, the application of coating technology has two main aspects, one is to improve the tightening function and anti-corrosion effect, and the other is to use a hardened particle coating to improve the stab-resistant effect by passivation. Ceramic as a stab-resistant material mainly uses its characteristics of high fracture toughness and high strength. First, the performance of ceramics is used to passivate and deform the cutter, and then either the backing material is added, or the protective clothing made of Kevlar and other fabrics is inserted to Achieve the required anti-stab effect.
1. Anti-knife cut: Special braided structure plus excellent performance of ultra-high strength fiber makes this garment have anti-cut function
2. Knife resistance: Ultra-high-strength fiber high-density weaving, using a special process to form a soft force group, which can prevent cuts
3. Anti-stab: anti-stab ability is greater than 500 Newton
4. Anti-theft: The blade cannot cut the anti-cut layer, and the items in the pocket of the clothes can prevent theft
5. High strength: Using ultra-high-strength fiber thread double-thread sewing to ensure the cut-proof level of the seam, not easy to damage, not easy to tear
6. Large area: 0.7 to 1.2 square meters, the protection area is greater than the protection area of ??4 pieces of soft stab-resistant clothing, stab-resistant vest, stab-resistant clothing
7. Light weight: 0.65 kg, excellent maneuverability
8. Thin thickness: does not affect the flexibility of the body. After putting on the coat, it is as concealed as normal dressing.
According to different classification angles, there can be different classification methods.
First of all, according to the type of stab weapon, stab-resistant clothing is divided into stab-resistant clothing with blade cutters and stab-resistant clothing with sharp cutters. Among them, the anti-stab clothing of the anti-blade cutter is mainly used to deal with the threat of high-quality commercial mechanically-processed knives under normal conditions. The anti-stab clothing of the anti-blade cutter is mainly to deal with the criminal transformation environment. Encountered low-quality spiked weapons.
Secondly, according to the flexibility and flexibility of the main body stab-resistant material, the stab-resistant clothing can be divided into hard, semi-hard and soft stab-resistant clothing. Hard stab-resistant clothing is a kind of stab-resistant armor with a certain shape and curved hard stab-resistant plate as a stab-resistant insert. Semi-rigid anti-stab clothing is a stab-resistant clothing with a certain degree of flexibility. This anti-stab clothing is composed of several layers, with one or several special metal sheets or steel ring sandwiches in the middle. The stab-resistant layer or stab-resistant plate of the soft stab-resistant clothing is composed of laminated high-performance stab-resistant fiber fabric or high-performance fiber flexible unidirectional composite material.
At present, the most authoritative test standards for stab-resistant performance of stab-resistant garments abroad are the PSDB (stab resistance standard for body armour) established by the United Kingdom in 1999 and the NIJstandard-0115.00 standard established by the United States in September 2000. The NIJ (National Institute of Justice) stab protection standard NIJ Standard-0115.00 defines the minimum conditions required for stab-resistant armor to protect the human body from sharp objects. The two standard test methods are basically the same, mainly by the impact of the stab-resistant clothing placed on the support material at a certain angle and energy with a falling body to measure whether it can penetrate and the depth of penetration. According to the US NIJ stab protection standard, stab-resistant individual armor is divided into two categories according to the degree of threat. Each category is further subdivided into 3 levels. Each protection level indicates the puncture energy that the stab-resistant material can absorb.
Soft anti-stab suit: used to resist attacks from common sharp objects such as daggers, bulletproof boards can be added.
Soft stab-resistant clothing made of stab-resistant materials made of ultra-high-strength ultra-high-density polyethylene chopped yarn and aramid chopped yarn, also known as stab-resistant vest or stab-resistant clothing, can effectively block knives and daggers The thorn, cut, and hack attacks of cold weapons fully protect the human torso and internal organs from harm. The material selected for the garment has excellent characteristics such as high breaking strength and large elastic modulus.
Executive Standard: Ministry of Public Security of the People's Republic of China GA68-2003 'stab-resistant clothing' standard
Protection level: 24 joules of kinetic energy without revealing the tip of the knife.
Anti-stab material surface density: <2.8 kg / m2, single layer density 184 g / m2.
Anti-stab material weight: 830 g / m2 (protection area 0.3 m2).
Protected area and weight: (Note: The weight of the product includes 0.3 kg of stab-resistant clothing cover)
Scope of use: Public security, security, industry and commerce, taxation, urban management, customs, flight attendants, car drivers, etc.
Service life: more than 50 years
Semi-flexible stab-resistant suit: blocking daggers, triangular blades, and general explosive fragments
Now a large amount of equipment for the public security department, this stab-resistant vest is a semi-flexible type, which is made of a variety of new materials according to a special composite new process. It not only has a stab-resistant function, but also effectively blocks general explosive items and fragments. Invasion, and at the same time has the functions of waterproof, acid and alkali resistance, UV protection, etc., overcomes the weakness of foreign full soft anti-stab vests that are not UV resistant, and is most suitable for civil aviation security, court police, financial network security, public security firefighters, corporate cashiers And engaged in special staff equipment. The stab-resistant vest is light weight (about 0.8kg), regardless of its performance or its price, it is currently at the leading level in China, and fills the domestic gap.
Raw material market analysis:
Anti-stab suit is a kind of personal protective armor. The fiber material for anti-stab fabric should have high strength, high modulus, shear resistance and impact resistance. Common international stab-resistant fiber materials are: ultra-high molecular weight polyethylene fiber (UHMWPE), aramid fiber and polyparaphenylene benzobisoxazole fiber (PBO), in addition, polybutylene terephthalate (PBT) , Ceramic fiber, carbon fiber, polyester fiber, artificial spider silk, etc. are also used.
1. Ultra-high molecular weight polyethylene fiber (UHMWPE)
, Also known as ultra-high-strength high-modulus polyethylene (UHS-HMPE) fiber, was obtained by Pennings of the Netherlands in the 1970s using the 'gel spinning-hot drawing' method, and industrialized production was achieved by DSM. Except for DSM and Honeywell (formerly Allied Signal) of the United States, Dyneema fiber and Spectra fiber produced by 'gel spinning-hot drawing method' are used, and Mitsui of Japan uses solution method to produce Tekmilon fiber. There are China Textile Investment, Hunan Zhongtai, Ningbo Dacheng, etc., which can carry out large-scale production.
Ultra high molecular weight polyethylene fiber is a low-density, high-strength, high-modulus high-performance fiber, the specific strength and specific modulus are extremely high, and the elongation at break is relatively low. At present, the international UHMWPE fiber spinning technology is relatively mature, and the United States, the Netherlands, and Japan have achieved large-scale production. The annual output of SPeetra900 and SPeetraI000UHMWPE fibers produced by Allied-Signal of the United States exceeds 1,000 tons, and the price is 49-61USD / kg, which is equivalent to aramid and carbon fiber. Compared with aramid, the cost performance is extremely high.
Internationally, the fiber can only be produced on a large scale by three companies including DSM, Honeywell, and Mitsui, with a total annual output of 9,000 tons, which is a scarce material worldwide, with a price of 400,000 per ton Yuan above.
Including domestic Aidi Polymer Materials Co., Ltd., there are 4 enterprises that can produce this fiber industrially. The annual output is less than 1,000 tons, and the whole has not yet achieved large-scale production. It is predicted that in the next 10 years, the domestic market demand for ultra-high molecular weight polyethylene fibers will reach more than 100,000 tons, with huge market demand potential and broad prospects.
2. Aramid-Kevlar fiber
It is an aromatic polyamide fiber, and polyparaphenylene terephthalamide (PPT) fiber is the most representative of aromatic polyamide fibers. It was first developed by DuPont Company of the United States, Kevla, with a strength of 20cN / dtex, PPT fiber. It has excellent physical and mechanical properties such as high strength, high modulus, low density and high energy absorption capacity, and has a wide range of applications.
Aramid is in short supply. It is exclusively developed and produced by DuPont in the United States. So far, only a few countries in the world can produce it. The global total annual output of aramid fiber is about 55,000 tons, and the total output of meta-aramid fiber is about 27,000 tons. Among the three high-performance fibers of aramid, carbon fiber and high-strength high-modulus polyethylene fiber, aramid has the largest output and demand, and the world's annual demand for para-aramid is more than 10%.
3. Poly-p-phenylene benzobisoxazole fiber
Poly-p-phenylene benzodioxazole (PBO) fiber was originally developed by the United States Air Force Aerodynamics, and Dow Chemical was patented to achieve industrialization. In 1990, Japan Toyobo obtained a patent for the development of fiberization technology. In 1995, ZYLON was produced. In 1998, it was industrialized by Japan Toyobo, with an annual production capacity of 200 tons.
PBO fiber is currently the best fiber among organic fibers with strength, modulus, heat resistance and other properties. Its physical and mechanical properties exceed aramid, carbon fiber and ultra-high molecular weight polyethylene fiber, and it is known as the 'king of fiber'.
4. Silk sericin
Silk is a high-grade textile raw material with good strength and elongation. The fiber is thin, soft and elastic. In recent years, under the concept of environmental protection, silk is used as a high-performance natural fiber material to make stab-resistant clothing.
The material wrapped around the silk fibroin in the cocoon silk is called sericin, which fixes the original silk fibroin on the silk fibroin, which can greatly improve the mechanical properties, strength, elongation performance and heat resistance of silk fibers, which are higher than those of aramid and carbon fibers.
According to statistics: China ’s mulberry silk output was 87,800 tons in 2005, reaching 93,000 tons in 2006,
5. Spider silk fiber
The main chemical composition of spider silk is composed of glycine, alanine and a small part of serine, and other amino acid monomer protein molecular chains, with high elasticity and high strength. The artificial gene spider silk developed by the Massachusetts National Army Chemical Biological Command Center and Canada ’s Quebec Necxia Biotechnology Company is 4-5 times stronger than steel and has a silk-like soft luster. , Tanks, satellites, radar and other equipment protective cover, stab-resistant clothing, etc.
Introduction of three anti-stab suit performance characteristics:
(1) Hard anti-stab clothing
The hard anti-stab suit is made of aviation super-hard aluminum alloy, the protection area is ≥0.3㎡, use standard test tool plus counterweight to reach 2.4kg with 24J kinetic energy, pierce the anti-stab suit at 0 °, 45 ° penetration angle, knife The tip does not penetrate the stab-resistant suit, and can effectively resist the attack of the common sharp objects such as daggers on the human body from various angles, so that the body protection parts are not stab wounded. The jacket and stab-resistant layer of the stab-resistant clothing are made of non-toxic materials, which has no natural harm to the human body. The jacket and the stab-resistant layer can be separated and can be easily removed and washed; the stab-resistant clothing is flexible and easy to put on and take off. The free movement of the arm and the movements of the human body such as kneeling, jumping, squatting, running, pitching, and turning are restricted.
(2) Semi-soft stab-resistant clothing
The semi-soft stab-resistant clothing is connected by alloy steel sheets in a seamless lap mode, the protection area is ≥0.3㎡, using a standard test tool plus a counterweight to reach 2.4kg with a kinetic energy of 24J, and puncture prevention at 0 ° and 45 ° penetration angles The stab clothing, the tip of the knife does not penetrate the stab-resistant clothing, can effectively resist the attack of the dagger and other common sharp objects on the human body from various angles, so that the body protection parts are not stab wounded. The jacket and stab-resistant layer of the stab-resistant clothing are made of non-toxic materials, which has no natural harm to the human body. The jacket and the stab-resistant layer can be separated and can be easily removed and washed; the stab-resistant clothing is flexible and easy to put on and take off. The free movement of the arm and the movements of the human body such as kneeling, jumping, squatting, running, pitching, and turning are restricted.
(3) Soft anti-stab clothing
Soft stab-resistant clothing uses ultra-high molecular weight polyethylene fiber, the latest stab-resistant product produced through special processing, with the characteristics of light weight, high stab resistance, comfort, breathability and so on. Protection area ≥0.3㎡, use standard test tool plus weight to reach 2.4kg with 24J kinetic energy, pierce the stab-resistant clothing at 0 °, 45 ° puncture angle, the blade tip does not penetrate the stab-resistant clothing, can effectively resist common sharps such as daggers The device attacks the human body from various angles, so that the protection parts of the human body are not stabbed. The jacket and stab-resistant layer of the stab-resistant clothing are made of non-toxic materials, which has no natural harm to the human body. The jacket and the stab-resistant layer can be separated and can be easily removed and washed; the stab-resistant clothing is flexible and easy to put on and take off. The free movement of the arm and the movements of the human body such as kneeling, jumping, squatting, running, pitching, and turning are restricted.