Ultra-high Molecular Weight Polyethylene Fiber

Ultra High Molecular Weight Polyethylene Fiber (UHMWPEF for short), also known as high-strength and high modulus polyethylene fiber, is the fiber with the highest specific strength and specific modulus in the world at present. Its molecular weight is between 1 million and 5 million.

The three major high-performance fibers in the world today are aramid fiber, carbon fiber and ultra-high molecular weight polyethylene fiber. 70% of UHMWPE fibers in the United States are used in bulletproof clothing, bulletproof helmets, bulletproof armor for military facilities and equipment, aerospace and other military fields. The development of high-performance fibers is the embodiment of a country's comprehensive strength and an important material foundation for building a modern power.

1. High specific strength, high specific modulus. The specific strength is more than ten times of the steel wire with the same section, and the specific modulus is only inferior to the super carbon fiber.

2. The fiber density is low, 0.97-0.98g/cm3, which can float on the water surface.

3. Low breaking elongation, large breaking work, strong energy absorption capacity, and therefore outstanding impact resistance and cutting resistance.

4. UV radiation, neutron and γ X-ray, high specific energy absorption, low dielectric constant, high electromagnetic wave transmission.

5. Chemical corrosion resistance, abrasion resistance, long bending life.

Physical properties:

Density: 0.97 ～ 0.98g/cm3. It is less dense than water and can float on water.

Strength: 2.8 ～ 4N/tex.

Modulus: 91 ～ 140N/tex.

Elongation: 3.5% ～ 3.7%.

The impact absorption energy is nearly twice as high as that of aramid fiber, with good wear resistance and low friction coefficient, but the melting point under stress is only 145~160 ℃.

1. In terms of national defense and military supplies equipment, due to its good impact resistance and large specific energy absorption, it can be made into protective clothing, helmets, bulletproof materials in military, such as the armor shield of helicopters, tanks and ships, the protective shell cover of radar, missile cover, bulletproof clothing, stab proof clothing, shields, parachutes, etc

2. In aerospace engineering, due to its light weight, high strength and good impact resistance, it is suitable for various aircraft wing tip structures, spacecraft structures and buoy aircraft. At the same time, it can also be used as the deceleration parachute for the landing of the space shuttle and the rope for suspending heavy objects on the aircraft, replacing the traditional wire rope and synthetic fiber rope. Its development speed is extremely fast.

3. In the civil field, the ropes, ropes, sails and fishing gear made of them are suitable for offshore engineering. The breaking length under self weight is 8 times that of steel ropes and 2 times that of aramid fibers. This rope is used for fixing anchor ropes of super oil tankers, offshore operating platforms, lighthouses, etc. It solves the problem of frequent replacement due to corrosion of steel ropes and corrosion, hydrolysis, UV degradation of nylon and polyester ropes.

4. In industrial applications, it can be used as pressure vessel, conveyor belt, filter material, automobile buffer plate, etc; In architecture, it can be used as wall and partition structure, and it can be used as reinforced cement composite material to improve the toughness of cement and its impact resistance. Because of its excellent wear resistance and impact resistance, it is widely used in the machinery manufacturing industry, and can be used to manufacture various mechanical parts such as gears, cams, impellers, rollers, pulleys, bearings, bearing shells, shaft sleeves, shaft cutting, gaskets, sealing gaskets, elastic couplings, screws, etc.

5. Helmets, skis, sail boards, fishing rods, rackets, bicycles, gliders, ultra light aircraft parts, etc. have been made on sports goods, and their performance is superior to that of traditional materials.

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