The application prospect of ultra-high molecular weight polyethylene fiber

by:SanTong     2021-02-05
Ultra-high molecular weight polyethylene fiber, say again with high strength and high modulus polyethylene fiber, is currently the world than strong degree and modulus maximum fibre, its molecular weight in 1 million ~ 5 million of polyethylene fiber spinning out. China's chemical fiber power, but not chemical fiber power, according to expert introduction, and the relevant departments of statistics, China's production of high performance special fiber is only one percent of the world. Three high performance fiber in the world today is: aramid fiber, carbon fiber, ultra-high molecular weight polyethylene fiber, the current Chinese due to technical problems only small amounts of aramid fiber production; Carbon fiber is still in the phase of experiment and primary production, the product can only be applied in the field of wear-resistant materials; Ultra-high molecular weight polyethylene fiber in 1994 with profit, break through the key production technology in the industrialization of ultra-high molecular weight polyethylene fibres has been formed in the domestic production base. According to the report, the ultra-high molecular weight polyethylene fiber 70% used for body armor, bulletproof helmets, military facilities and equipment, aerospace and other military body armor field, and the development of high performance fiber is a reflection of a nation's comprehensive strength, is an important material basis of construction of modern power. At present, countries have vigorously support and accelerate the development of production and application of ultra-high molecular weight polyethylene fiber in our country, the domestic UHMWPE fiber has occupied pivotal position in the whole world. Because of the high strength polyethylene fiber, high specific modulus. Strength of more than ten times that of the same wire, after super than modulus carbon fiber, its strong performance requirements elongation test of tensile strength tester is much higher than normal fiber. It requires that the holder of the fiber tensile strength tester can clamping fiber sample don't skid in the tensile test, and don't damage fiber by clamping force is too large. Early production using the manual holder, electronic tensile strength tester with artificial tighten bolts clamping fiber sample, clamping force is difficult to control, in order to prevent sample skid manual clamping force is too large, often cause gripper jaw stress excessive concentration, the strength and elongation is low, the test results of fiber quality correct evaluation of an adverse outcome. Pneumatic gripper automatic operation and constant clamping force and can be adjusted by pressure control, reduced the operator's influence on the test results, test results are accurate, stable and widely used. Only pneumatic gripper can satisfy the high performance polyethylene fibers with high strength and high modulus fiber tensile strength tester's strong performance test requirements. The application prospect of ultra-high molecular weight polyethylene fiber: because the ultra-high molecular weight polyethylene fiber has many excellent properties, it is in the high performance fiber market, including from offshore oil field of mooring rope to high performance lightweight composite materials are showing great advantage, in the modern war and areas such as aviation, aerospace, maritime defense equipment plays a vital role. Defence impact resistance performance is good, because the fibers is larger than the energy absorption, the military can be made into protective cloth, helmets and bulletproof material, such as helicopters, tanks and ships protective shell cover of armor plate, radar, missile shield, body armor, extra clothes, shield, etc. , of which the application of body armor is more conspicuous. It has the advantages of soft bulletproof effect is better than that of aramid fiber, has now become the main fiber bulletproof vests market occupation of the United States. Other than a recoiling of ultra-high molecular weight polyethylene fiber composites load value of U/p 10 times that of steel, more than 2 times the glass fiber and aramid fiber. Abroad with the fiber reinforced resin composite material made of bulletproof, riot helmet has become a helmet and aramid fiber reinforced composite material substitute for helmet. Aviation in aerospace engineering, because the fiber composite materials of lightweight, high strength and impact resistant performance is good, suitable for all kinds of aircraft wing tip structure, the structure of the spacecraft and buoy aircraft, etc. The fiber can also be used as the reduction of the space shuttle landing plane and a suspension of lifting rope, instead of traditional steel rope and synthetic fibre ropes, its exceptionally rapid development speed. Civilian aspects ( 1) Rope, rope applications: made from the fiber rope, rope, sails and fishing gear used in ocean engineering, was the original purpose of the fiber. Widely used for negative power cord, rope overloading rope, salvage, towing rope, sailing and fishing line, etc. The fiber ropes, fracture length is under the weight of the steel rope eight times, 2 times that of aramid fiber. The rope is used for super tanker, Marine platform, such as a beacon of anchor rope, solved the previous use of steel cable corrosion, polyester and nylon rope of corrosion, such as hydrolysis, ultraviolet degradation caused the decrease of strength of the cable and rupture, often need to be replaced. ( 2) Sports equipment products: in the sporting goods has been made on the helmet, skis, sail round plates, rods, the racket and cycling, gliding plate, ultra-low weight aircraft parts, etc. , its performance than traditional materials as well. ( 3) Used as a biological material: the fiber reinforced composite material is used for the plates graft and plastic materials, medical suture, etc. , it has good biocompatibility and durability, and has high stability, will not cause allergic, have for clinical application. Also used for medical gloves and other health measures, etc. ( 4) Industry, the fiber and its composite material can be used for pressure container, conveyor belt, filtration material, automobile cushion plate, etc. ; Architecture can be used as a wall, diaphragm structure, use it as a reinforced cement composite material can improve the toughness of cement, improve the shock resistance. Purpose: bullet-proof vests and helmets, light armor, sails, cable, optical cable reinforcing body of the parachute and filter material, etc.
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