Liquid Crystal Fiber Is Expected To Enhance Flame Retardant Protection.

< p > because the main chain liquid crystal polymer can not be molded, it can only be solution spinning or coating. The research focus is focused on thermotropic liquid crystalline polymers which can be melted without solvent.

In the 80s of last century, the American Celanese company successfully developed the aromatic polyester liquid crystal fiber, the trade name Vectran.

The Japanese Cola company introduced the technology to achieve the industrialization of Vectran thermal a href= "http://www.91se91.com/news/" > liquid crystal fiber < /a >.

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< p > the main characteristics of liquid crystal polymers are the molecular chain orientation in the force field, the rigid chain conformation of the polymer chains, the formation of highly ordered microfibrils, and the strong interaction between molecules, thus giving the liquid crystalline polymers very high tensile strength and modulus.

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The study of aromatic polyester liquid crystal fibers in China started in the 90s of last century, but P has not made much progress.

In recent years, Donghua University and Sichuan a target= "_blank" href= "http://www.91se91.com/" > textile > /a > Institute of science and technology and so on have started the research again. At present, great progress has been made, not only to solve the problem of spinning difficulty, but also to make breakthrough progress in the post-processing technology of aromatic polyester liquid crystal fiber, and the fiber performance reaches the target of Vectran fiber, laying the foundation for realizing industrial production.

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< p > Vectran fiber is a kind of polyester which is similar to aromatic polyamide. Naphthalene is used to replace ethylene. Naphthalene is a double ring structure. Therefore, the planar molecule has been repeatedly established. Compared with ordinary polyester, its strength, modulus and thermal stability have been enhanced. Meanwhile, it has maintained the advantages of good processability, dimensional stability and very low moisture regain of polyester.

Such molecular structure also gives them excellent properties of high strength, wear resistance and chemical corrosion resistance.

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< p > Vectran fiber can meet the demands of high technology, high strength, high modulus, high temperature resistance, high radiation resistance and high technology.

Therefore, it can be applied in the fields of aerospace, low temperature, anti radiation fabric, armor protection, warship rope and other national defense and pportation fields, as well as high temperature filter materials, electronic insulation materials, sports goods and other dual-use fields.

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< p > for example, the fiber can be used in modern military protective equipment. At present, the global anti-terrorism situation is becoming increasingly serious. DuPont Co has expanded its aramid production line by 25%, and developed a new Kevlar Comfort XLT product specially designed for bulletproof vest, which can reduce the quality of the final product by 25%, which is of great significance for the modernization of the military equipment.

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< p > there is also the environmental problem that we are very concerned about at present. Lightening of modern pportation equipment such as automobiles, trains and aircraft can greatly reduce weight, save energy and protect environment.

For example, medium sized aircraft body uses 50% of fiber reinforced materials, because the quality can be reduced by 20%, which means that an aircraft needs less emissions of 27 thousand tons CO2 in 10 years. If ordinary passenger cars use 17% fiber reinforced materials, the body will be reduced by 30%, so that each vehicle can be reduced by 5 tons CO2 per year.

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< p > > a href= "http://www.91se91.com" > Vectran fiber < /a > has many advantages compared with < a href= "http://www.91se91.com/news/index_c.asp" > aramid fiber < /a >. First of all, melt spinning is adopted to avoid many defects of aramid dry wet spinning.

It is superior to aramid in chemical corrosion resistance, aging resistance, radiation resistance and friction resistance.

Vectran can not only replace the application of aramid in high strength and high modulus, but also play a greater role in the field of safety protection, light energy saving, high temperature and low temperature and radiation tolerance. The market prospect is very broad.

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