Ultra-high molecular weight polyethylene fiber, also known as high-strength high-modulus polyethylene fiber, is currently the fiber with the highest specific strength and specific modulus in the world, and it is a fiber spun from polyethylene with a molecular weight of 1 million to 5 million.
performance
1. High specific strength and high specific modulus. The specific strength is more than ten times that of steel wires of the same cross-section, and the specific modulus is second only to special grade carbon fiber.
2. The fiber density is low, the density is 0.97-0.98g/cm3, which can float on the water surface.
3. Low elongation at break, great work at break, and strong ability to absorb energy, so it has outstanding impact resistance and cutting resistance.
4. Anti-ultraviolet radiation, anti-neutron and gamma rays, high specific energy absorption, low dielectric constant and high electromagnetic wave transmittance.
5. Chemical resistance, wear resistance, and long flex life.
Physical properties:
Density: 0.97～0.98g/cm3. It has a lower density than water and can float on water.
Strength: 2.8～4N/tex.
Modulus: 91～140N/tex.
Extensibility: 3.5%～3.7%.
The impact absorption energy is nearly twice as high as that of para-aramid fiber. It has good wear resistance and low friction coefficient, but its melting point is only 145-160℃ under stress.
use:
As UHMWPE fiber has many excellent characteristics, it has shown great advantages in the high-performance fiber market, including from offshore oilfield mooring ropes to high-performance lightweight composite materials, and has shown great advantages in modern warfare and aviation. , Aerospace, maritime defense equipment and other fields play a pivotal role
national defense
Because the fiber has good impact resistance and greater energy absorption, it can be made into protective clothing, helmets, and bulletproof materials in the military, such as armored shields for helicopters, tanks and ships, protective shells for radars, and missile covers. , Bulletproof vests, stab-resistant vests, shields, etc., among which the application of bulletproof vests is the most eye-catching. It has the advantage of being light and soft, and its bulletproof effect is better than that of aramid. It has become the main fiber occupying the American bulletproof vest market. In addition, the specific impact load value U/p of UHMWPE fiber composite materials is 10 times that of steel, and more than twice that of glass fiber and aramid. Bulletproof and riot helmets made of fiber-reinforced resin composite materials abroad have become substitutes for steel helmets and aramid-reinforced composite helmets.
Aerospace
In aerospace engineering, due to the light weight, high strength and good impact resistance of the fiber composite material, it is suitable for various aircraft wingtip structures, spacecraft structures and buoy aircraft. The fiber can also be used as a decelerating parachute for the landing of a space shuttle and a rope for suspending heavy objects on an aircraft, replacing traditional steel cables and synthetic fiber ropes, and its development speed is extremely fast.
Civil
(1) Application of ropes and cables: ropes, cables, sails and fishing gear made of this fiber are suitable for marine engineering and are the initial use of the fiber. It is generally used for negative force ropes, heavy-duty ropes, salvage ropes, towing ropes, sailing ropes and fishing lines. The rope made of this fiber has a breaking length under its own weight that is 8 times that of steel rope and 2 times that of aramid fiber. The rope is used for the fixed anchor ropes of supertankers, marine operating platforms, lighthouses, etc., and solves the rust and the corrosion, hydrolysis, and ultraviolet degradation of nylon and polyester ropes encountered in the past using steel ropes. The strength of the ropes is reduced and broken. , The problem of frequent replacement.
(2) Sports equipment products: safety helmets, snowboards, windsurfing boards, fishing rods, rackets and bicycles, gliding boards, ultra-lightweight aircraft parts, etc. have been made into sports products, and their performance is better than traditional materials.
(3) Used as a biological material: The fiber-reinforced composite material is used in dental tray materials, medical implants and plastic sutures. It has good biocompatibility and durability, and has high stability. Causes allergies and has been used in clinical applications. It is also used in medical gloves and other medical measures.
(4) In industry, the fiber and its composite material can be used as pressure container, conveyor belt, filter material, automobile buffer board, etc.; in construction, it can be used as wall, partition structure, etc., and it can be used as reinforced cement composite material. Improve the toughness of cement and improve its impact resistance.
Uses: bulletproof vests and helmets, lightweight armor, sails, cables, optical cables, parachutes and filters, etc.
