National Defense Fire Retardant Textiles

China Industrial Textiles Association Military and Textile Branch President Chen Xuwei

The procurement and production of military textiles have gradually changed from the mystification of the early years. With the changes of times and market demands, the willingness and voice of both parties of the supply and demand sides to communicate have become higher and higher. This also provides military textiles with higher cost performance. The platform. In terms of flame-retardant products, chemical flame-retardant fibers include: aramid 1313, aramid 1414, heterocyclic aramid, arylsulfone, carbon fiber, and vinylon. Among them, flame-retardant fibers are mainly used as intermediate products in protective clothing, anti-inflating clothing, and compensation services. The demands and trends of anti-yellow clothing and compensation clothing on textile materials are mainly reflected in light weight, anti-aging, and better Strength, easy dyeing, flame retardant, waterproof and breathable properties. It is worth mentioning that breakthroughs in the anti-high temperature and anti-irradiation indexes of the textile coating and outer layer materials in the Shenzhou 7 extravehicular space suits. The protective materials are tear-proof, wear-resistant, heat-resistant, and micro-meteors. Chemical resistance, anti-ionizing radiation and other properties.

The application fields of flame-retardant fibers in parachutes generally include: parasols for parachutes, umbrella ropes, group straps, and umbrella covers. In addition to some buttons and ring pulls, a complete set of parachutes are made of metal. It is made of flame-retardant composite fibers. With the advancement of military scientific and technological strength, parachutes are increasingly demanding textile materials, which are mainly reflected in: light weight, high strength, aging resistance, flame retardant, anti-burning, anti-static, stable form breaking strength and tear strength Good; can adapt to different air permeability; one-way extension can be implemented within the design range according to the specific application.

In addition to some special clothing, flame-retardant fibers are also used to block nets, gun clothing, aircraft blankets, tents, camouflage nets, etc., among which a camouflage material developed by the Second Artillery Armament Research Institute in a room of the 6th Institute - Chameleon, The main components are also flame-retardant composite fibers.

Textile Flame Retardant Finishing Technology and Its Product Development

Ph.D. Supervisor of Textile Chemistry Engineering Department of Donghua University Cai Sheng

Generally, the combustion of fabrics can be divided into three stages, namely thermal decomposition, thermal ignition, and thermal ignition. Four flame retardant agents are used to resist the four elements of different combustion stages, forming a variety of flame retardant mechanisms. Interrupt the flame retardant mechanism. According to the existing research results, the flame-retardant mechanism can be roughly divided into an endothermic reaction, a free radical formation, a melting theory, a non-flammable gas generation, and a condensed phase flame retardant.

According to the classification of the flame retardant compound type, inorganic flame retardants are included, which can not only play a flame-retardant effect but also play a filling role. Organic flame retardants are divided into two series: phosphorus and halogen. The former is very limited in use. Halogen-based flame retardants include chlorine and bromine two major categories.

Flame-retardant fibers are manufactured mainly by coating methods, blending methods, copolymerization methods and graft modification methods, and sheath-core composite spinning methods. The processing technology of fabrics for flame retardant finishing includes padding, roasting, impregnation, drying, coating, spraying, and organic solvent.

With the increasing sales of motor vehicles, high-speed trains and cars, the market for high-grade interior flame-retardant fabrics has also been increasing. Each train needs about 1,000 meters of seat fabric; each car needs about 20 meters of textiles, and more than 80 designs. part.

In 2007, high-end automotive interior textiles need to have the characteristics of flame retardancy, moisture absorption, air permeability, high color fastness, sun resistance, anti-static, anti-pilling, etc., which are higher than the requirements for taking textiles, and China’s development capacity is weak. With the introduction of complete sets of technologies, high-end products are monopolized by Japan and European countries. Its technical difficulties mainly include the large amount of the existing flame retardant, resulting in large smoke, the fabric is not heat-resistant, sticky at high temperatures, smoke density, smoke toxicity and outstanding problems such as droplets.

To this end, we have developed and designed P-T expansive flame retardants that are formaldehyde-free, halogen-free, have good thermal and hydrolytic stability, have high melting points and low moisture absorption. The flame retardant and safety of special textile fabrics for high-speed train seats using this flame retardant have passed the US FRA standard, the French NF standard, the British BS standard, and the German DIN standard, and have been successfully applied to French long passengers and Japanese-style Qingdao Sifang. Siemens and others.

Why use protective clothing

Personal protection expert GEOFF, a famous European fiber company

Correct selection and use of flame-retardant protective clothing can reduce catastrophic clothing fire and save lives. Compared to the cost of rehabilitation treatment in hospitals after burns, the cost of protective clothing is minimal and it is the most effective. If workers are wearing the wrong clothes, the place where they are worn will be more serious than the skin burned in the exposed areas.

Nowadays, more and more countries have already enacted mandatory laws requiring workers in hazardous areas to be equipped with appropriate personal protective equipment. Many multinational corporations such as Malaysian Petroleum Corporation, Shell Petroleum Corporation, and Alcoa Corporation have all adopted the policy of wearing personal protective equipment. The formal employees and contract employees who are on-site operations are required to use personal protective equipment for work. China is also In many industrial fields, workers are employed or ordered to wear personal protective equipment.

According to calculations, every 1% of skin burn patients need to be hospitalized for 1.5 days, requiring an average of 19 days of hospitalization and spending over $18,000 per day. The cost of hospitalization is between 200,000 and 700,000 U.S. dollars, and in many cases over 1 million U.S. dollars.

The flame retardant property is that when the flame leaves the fabric, the fabric has a self-extinguishing property. Flame retardant finishing is the corresponding flame retardant finishing of the fabric, so that it has the self-extinguishing properties after the flame leaves. Finishing fabrics are treated with flame retardants to make the fabrics flame-retardant. However, some fabrics will contain formaldehyde and other toxic substances, and the flame retardants have been taken away during the daily washing process. Intrinsically flame-retardant fabrics have flame-retardant properties due to the fibers, and the flame-retardant effect does not decrease with increasing washing frequency, such as aramid fibers, cellulose-based flame-retardant fibers, and the like.

Flame retardant test requirements include vertical burning test, 12-second flame burning, less than 6 inches of damaged charcoal, and less than 2 second afterflame. Wearing the correct flame retardant protective clothing will reduce injuries. The industrial fields for purchasing protective clothing in the future include: power grids and natural gas companies, steel-making plants, and fire and rescue services.

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