Military Textile Purchasing And Production Is Gradually Changing.

< p > for the flame retardant products, the chemical flame retardant fibers mainly include: aramid fiber 1313, aramid 1414, heterocyclic aramid fiber, polysulfonamide fiber, carbon fiber and vinylon.

Flame retardant fibers are mainly used in intermediate products such as protective clothing, anti-G suit, compensatory clothing and so on. The requirements and trends of anti-wear clothing and compensation clothing on textile materials are mainly reflected in light weight, aging resistance, good strength, easy dyeing, flame retardant, waterproof and breathability.

It is worth mentioning that the seven layers of extravehicular spacesuit, the textile coating and outer material, have breakthroughs in high temperature, radiation resistance and other indicators. The protective materials have the properties of tear resistance, wear resistance, thermal radiation protection, anti meteor, chemical corrosion resistance, and radiation protection.

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< p > the application fields of flame-retardant fibers in parachutes include: parachutes, parachutes, belts and umbrella covers. Parachutes are made of metal and made of flame retardant composite fibers in a complete set of parachutes.

With the improvement of the military's technological strength, parachutes have more and more demands on textile materials, which are mainly characterized by light weight, high strength, aging resistance, flame retardant, anti burning, antistatic, stable form, breaking strength and tear strength, and can be adapted to different air permeability.

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< p > in addition to some special a href= "http://www.91se91.com/news/index_c.asp" > clothing < /a >, flame retardant fiber is also applied to block net, gunpowder, aircraft mask, tent, camouflage net, etc. a camouflage material, chameleon, developed by 6 of Second Artillery Equipment Research Institute, is also a main component of flame-retardant composite fiber.

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< p > < strong > > a href= "http://www.91se91.com/news/index_c.asp" > textile > /a > flame retardant finishing technology and product development < /strong > /p >

< p > < strong > Cai Zaisheng, director, doctoral tutor of Department of textile chemical engineering, Donghua University, < /strong > /p >

< p > usually < a href= "http://www.91se91.com/news/index_c.asp" > fabric < /a > combustion can be divided into three stages, namely, thermal decomposition, thermal ignition and thermal ignition. Different kinds of flame retardants are used to resist the four factors in different combustion stages, thus forming a variety of flame retardant mechanisms and interruption of flame retardant mechanism.

According to the existing research results, the flame retardant mechanism can be roughly divided into endothermic reaction, formation of free radicals, melting theory, formation of non combustible gases, flame retardation of condensed phase and so on.

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< p > classification of flame retardant compounds, including inorganic flame retardants, can not only play a role in flame retardancy, but also play a role in filling.

Organic flame retardants are divided into two series: phosphorus and halogen series.

The former is very limited in use.

Halogen - based flame retardants mainly include two major categories of chlorine and bromine.

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< p > flame retardant fibers are mainly made by coating, blending, copolymerization, grafting modification and skin core composite spinning.

The processing technology of fabric flame retardant finishing mainly includes dip rolling, baking, drying, coating, spraying and organic solvent.

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< p > with the increasing sales volume of motor cars, high-speed trains and cars, the market of high-grade interior flame retardant fabrics is also increasing. Among them, each row of motor cars needs about 1000 meters of seat fabric; each car needs about 20 meters of textiles, and more than 80 components are designed.

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< p > 2007, high-grade car interior textiles need to have the characteristics of flame retardant, moisture absorption, breathability, high color fastness, sun resistance, antistatic, anti hair and so on. They are more demanding than textiles, and China's development capability is weak. The main products are imported complete sets of technology, and high-end products are monopolized by Japan and European countries.

The technical difficulties are mainly due to the large amount of flame retardant used, resulting in large smoke, heat resistance of finished fabrics, sticky at high temperature, smoke density, smoke toxicity and droplet problem.

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< p > for this purpose, we developed the P T intumescent flame retardant, which has no formaldehyde, no halogen, good heat and hydrolysis stability, high melting point and low hygroscopicity.

The flame retardancy and safety of high speed train seat special textile fabrics with this flame retardant have been successfully applied to French long customers, Japanese Qingdao Sifang, SIEMENS and so on through the US FRA standard, the French NF standard, the British BS standard and the German DIN standard.

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< p > < strong > the application of intrinsic flame retardant fiber in the field of safety protection < /strong > < /p >

< p > < strong > Yantai Tai He New Material Co., Ltd., Sun Peng, Minister of sales of aramid, /strong < /p >

< p > essential flame retardant depends on the flame retardant and heat insulation properties of the material itself.

Its flame retardant and heat insulation properties are not obtained by adding other chemical AIDS, but will not decrease with the increase of wearing time and washing times.

Such as aramid, flame retardant cyanogen chloride, flame retardant viscose and so on.

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< p > aramid fiber is essentially flame retardant, high fiber strength, low halogen content, good wearability, good flame retardant effect and wide application in the field of flame-retardant clothing.

Flame-retardant cotton is flame retardant after finishing, its flame retardant effect is poor, fabric strength is low, wearability is good, fabric strength and flame retardant effect will decrease with the increase of washing times until disappearance, and fabric will release free formaldehyde.

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< p > aromatic polyamide fiber, with its excellent properties such as light weight, flame retardancy, high temperature resistance, high strength, insulation, radiation resistance, high strength and high elastic modulus, has become an important strategic material related to national defense safety and national economy. It is a key material for military equipment, fire-fighting protection and fire protection equipment for military and police, and national backbone equipment manufacturing. It can also be widely used in safety protection, environmental protection filtration, structural enhancement and electrical insulation in energy, pportation, chemical, electronics, construction and other industries.

The developed countries all over the world attach great importance to the research and industrialization development of aramid.

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< p > aramid products have the following characteristics: complete varieties, excellent fiber properties, high color fastness, and more green environmental protection.

Meta aramid fiber is an organic high temperature resistant fiber with excellent comprehensive properties. It is widely used in environmental protection filtration, protective clothing and industrial textiles as well as aramid paper and other fields because of its excellent heat resistance, intrinsic flame retardance and chemical stability.

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< p > because the domestic industry standard is generally low, the application of aramid fiber has not been well popularized.

We believe that with the increasing emphasis on health and safety in the country, the industry safety standards will gradually be in line with the international standards. The domestic aramid manufacturing enterprises have already prepared for the differential development of products and improved the application technology of aramid fiber, and have done a lot of work. The aramid industry will go further and the prospect will be broader.

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< p > < strong > flame retardant tooling selection and evaluation method < /strong > < /p >

< p > < strong > DuPont Group China Limited Protection Technology Engineer Zhang Liyan < /strong > /p >

< p > fire retardant protection evaluation of flame retardant tooling is mainly based on three methods: the vertical combustion test method, the test process: using standard methane flame, continuous burning fabric 12 seconds after removal or extinguishment, observe the fabric continues to burn, and measure the length of damaged fabric after burning.

The vertical combustion test method is to simulate the burning state of the fabric when the flame starts to burn from the bottom of the fabric, which is less in real fire.

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< p > thermal protection performance (TPP) test method, thermal protection performance TPP test method, closer to the real situation, better reflects the fabric's thermal protection performance, and is widely adopted by NFPA and GB.

The TPP test method of thermal protection performance is closer to the real situation and reflects the thermal protection performance of fabrics.

The thermman test is the most realistic simulation of the actual fire when using the real person model. It can best reflect the thermal protection performance of the flame retardant clothing, and is one of the most advanced thermal burn evaluation equipment in the world.

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< p > the evaluation of mechanical fastness of fire-retardant tooling mainly includes tensile fracture properties, in which fabric tensile fracture shows the elongation and deformation capacity of fabric at maximum load, and the fracture work load indicates that the area under the elongation curve is the fracture work, which is the energy absorbed by the fabric when it stretches to fracture, that is, the inherent binding energy of the fabric to resist external damage.

The stronger the breaking power is, the stronger the fabric is.

The size of the fracture work can reflect the wearing fastness of the fabric, and the wearing time proves that the fibers and fabrics with relatively low strength and high elongation are more durable.

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< p > tear and fracture performance is more important. In the beginning of textile material analysis of fabric tear property, it is pointed out that tear strength is more reflective of fabric fastness than tensile fracture strength.

In the 1990 Journal of China Textile University, Yang Yixiong also pointed out in the study of the tearing phenomenon of woven fabrics that the tensile failure of fabrics requires a larger load to make the yarn broken in the receiving system, which is seldom seen in the actual wearing of woven fabrics.

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< p > during the actual wearing process, the fabric is blocked by foreign matter and the local force is torn.

In production, tear strength can be used to reflect fabric fastness better than tensile breaking strength.

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In conclusion, when evaluating the mechanical properties of flame-retardant protective woven fabrics, the size of fracture strength can not represent the mechanical durability of P. The elongation at break, fracture work, tear strength and wear resistance must be considered comprehensively.

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< p > a large number of experimental results and practical experience show that when other conditions are the same, the relatively low strength and high stretch fabric has better mechanical durability and can provide better fastness performance in the actual wearing process.

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