Ultra high molecular weight polyethylene (UHMWPE) is a polyethylene with molecular weight between 1 million and 5 million. The molecular weight of ordinary polyethylene varies from hundreds of thousands to tens of thousands. Therefore, UHMWPE has the excellent characteristics that ordinary POLYETHYLENE cannot achieve, such as extremely high wear resistance, higher strength than most metals, and excellent impact resistance. Is a widely used engineering plastics.
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At present, the world’s three high performance fibers are: aramid fiber, carbon fiber and UHMWPE fiber. Currently, aramid fiber is only produced in small quantities in China due to technical problems. Carbon fiber is still in the stage of testing and primary production, the product can only be used in the field of wear-resistant filler; Since the breakthrough of key production technology in 1994, uHMWPE fiber has formed several industrial production bases of UHMWPE fiber in China. 1.lightweight : UHMWPE has a density of only 0.97-0.98g/cm3 and can float on the water. 2.Excellent mechanical properties : · The specific strength is more than 10 times that of steel wire of the same section 3.Water absorption is very low : There is generally no need for drying before processing 4. Strong weatherability : Has the excellent ultraviolet ray resistance ability, after 1500h sun, the intensity still preserves above 80%. It can screen radiation, so it can be used as a screen for nuclear power plants 5. Health non-toxic : Can be used in contact with food and medicine Poor heat resistance : The melting point of PE and ordinary PE is about 140℃. High processing difficulty : Uhmwpe has poor fluidity and a melt index of almost zero, requiring special equipment for processing. Low stiffness and hardness : But this shortcoming can be improved by modification 01. National defense : Due to its good impact resistance and higher energy absorption, the fiber can be made into protective clothing, helmets and bulletproof materials in the military, such as helicopter, tank and ship armor plate, radar protective housing, missile shield, bulletproof vest, stinger vest, shield, etc. Among them, the application of flak jacket is the most eye-catching. It has the advantages of softness, bulletproof effect is better than aramid fiber, has become the main fiber occupying the Bulletproof vest market in the United States. In addition, the specific impact load of UHMWPE fiber composite is 10 times that of steel, and more than 2 times that of glass fiber and arylon fiber. Foreign bulletproof and riot helmets made of the fiber reinforced resin composite material have become substitutes for steel helmet and aramid reinforced composite material helmet. 02. Aviation : In aerospace engineering, the fiber composite material is suitable for wing tip structure, spacecraft structure and buoy plane because of its light weight, high strength and good impact resistance. The fiber can also be used as a deceleration parachute for space shuttle landings and as a rope to suspend heavy objects from the aircraft. Instead of traditional steel cables and synthetic fiber ropes, the fiber is developing very fast. 03. Civil aspects : For more UHMWPE Protective Composite Materialinformation, please contact us. We will provide professional answers. (1) Application of ropes and cables: Ropes, cables, sails and fishing gear made of the fiber are suitable for Marine engineering and are the initial uses of the fiber. It is commonly used for load line, heavy haul line, salvage line, towing line, sailboat line and fishing line. The fiber rope, under its own weight, breaks eight times longer than steel rope and twice as long as arylon. This cable is used as anchor cable for supertankers, Marine operating platforms, lighthouses and so on, which solves the problems of corrosion, hydrolysis, and ultraviolet degradation caused by corrosion of steel cables and nylon and polyester cables in the past and requires frequent replacement. (2) Sports equipment: In sports equipment, safety helmet, skis, sail board, fishing rod, rackets and bicycle, glide board, ultra-light aircraft parts have been made, and their wear resistance is better than traditional materials. (3) Used as biomaterial: The fiber-reinforced composite material has been used for denture material, medical graft and orthopedic suture, etc. It has good biocompatibility and durability, high stability, and will not cause allergy, so it has been used in clinical application. It is also used for medical gloves and other medical measures. (4) In industry, the fiber and its composite material can be used as pressure vessel, conveyor belt, filter material, automobile buffer plate, etc.; In terms of architecture, it can be used as wall and clapboard structure, etc. It can be used as reinforced cement composite material to improve the toughness and impact resistance of cement. Mining industry: Manufacture artificial trough lining, gate, chain plate, vibrating screen plate, conveyor plate, mine car liner. General machinery industry: manufacturing various shaft sleeves, gears, bushes, sliding plates, impellers, etc. Vehicle manufacturing and transportation industry: the main products are dump trucks, lining boards of dump ships, impact-resistant parts of train vehicles, etc. Paper industry: mainly produces vacuum suction box panels and wipers, compacted parts, joints, motorized sealing shafts, sheet guide wheels, scrapers, filters, etc. Textile industry: Manufacture various pickles, fiber rolls, shuttle rods, gears, and connections. Impact and wear-resistant parts such as sweeping rods, buffer blocks, rod bushings, and swinging rear beams. Catering light industry: manufacturing panels, cutting boards, working panels, cams, gears, etc. Ceramic industry: Manufacture rolling heads, filter plates, wheels, etc. of various specifications. Sports industry: ski lining, tracked ice and snow car parts, glider block floor, steel ball device parts, various bearing bushings, rolling fairways, motorized sled parts, etc. There is a broad market demand for ultra-high molecular weight polyethylene fibers in the military and civilian fields, and the industry is booming. In the civilian field, high-strength high-modulus polyethylene fiber is a high-performance fiber, and its application fields are relatively wide. Including security protection, marine industry, aerospace, sports equipment, new building materials and so on. With the advancement of production technology, the reduction of production costs and the continuous expansion of application fields, its market demand will further expand. High-strength and high-modulus polyethylene fibers will have a broad market in the future. Judging from the ultra-high molecular weight polyethylene market revenue, the global ultra-high molecular weight polyethylene market will reach US$1.984 billion in 2021. It is predicted that the UHMWPE market will grow from US$1.984 billion to US$3.847 billion in 2022-2028, with a CAGR of approximately 11.65%. “Ultra High Molecular Weight Polyethylene Market Size, Share & Trends Analysis Report By Product (Medical Grade & Prosthetics, Fibers, Sheets, Rods), Application, Region and Segment Forecasts, 2022 – 2030 – GRAND VIEW RESEARCH” | Time: December 07, 2022.Merit:
· The specific modulus is second only to super carbon fiber
· Low elongation at break, outstanding impact resistance and cutting resistance
· Extremely high wear resistance and self-lubricity
· The fatigue performance is the strongest among existing fibers and has a long service life Defect :
Application area :
Application Fields of Ultra-High Molecular Weight Polyethylene Sheet Profiles:
Global Ultra High Molecular Weight Polyethylene (UHMWPE) Industry Market Trend Report
References
The NRC provides R&D services to the Canadian Defence Industry; it is conducting studies that will provide data to manufacture personal protection equipment (PPE), but is lacking tools that can apply uniform pressure on complex geometry parts featuring near-vertical walls, and for testing different material solutions. The newest generations of lightweight, high performance composites materials, developed for ballistic protection applications are made from UHMWPE. These materials are very difficult to mould, especially into small objects involving complex geometries featuring double curvatures (ex. a hemisphere). These materials also require extremely high moulding pressures, and a very tight and accurate temperature control.
This challenge seeks a modular tool for moulding small parts made with UHMWPE-based composite materials, such as a helmet shell for a soldier (which is almost spherical), allowing for a precise control of the manufacturing process over a wide spectrum of pressures and temperatures, which can be reconfigured at minimum cost to support the industry in the development of specific applications. The generic tool sought in this challenge used in conjunction with NRC's high tonnage press, would allow NRC to study UHMWPE molding conditions, including pressure and temperature.
The desired outcome is the development of a generic tool/tooling platform capable of moulding, using the newest generation of ballistic protection UHMWPE-based composites, personal protection equipment about the size of, and similar in shape to a military helmet (e.g. ACH Gen 2), under various controlled conditions of pressure and temperature.
Proposed solutions must:
The NRC, through its Security Materials Technologies (SMT) program, has the mandate to support the Canadian Defence Industry and foster innovation.
Personal protection equipment (PPE) such as helmets or ballistic inserts used by the military or police corps represents major market opportunities for the Canadian defence industry. Since 2000, NRC has developed significant expertise in the fabrication of aramid-based composite helmets. In recent years though, high-end personal protection equipment is being made from the newest high performance UHMWPE-based composites. These new materials offer unmatched ballistic protection at extremely low weight but they are cardboard-like and difficult to work with. They also require extremely high moulding pressures, and a very tight and accurate temperature control. Manufacturing PPE components using these UHMWPE-based materials requires large tonnage presses and expensive metallic tools. The large initial capital investment needed for industry to adopt these new materials has been a major barrier.
NRC has conducted some studies with UHMWPE-based materials; however the high moulding pressure and accurate temperature control required by these new materials currently preclude NRC from working at the component or system level, i.e. what is most relevant for industry. A generic, modular tool, would thus allow NRC to conduct studies to develop new PPE solutions, offer industry a full development platform to test different concepts, optimize designs and fabricate prototypes.
The generic, modular tool, developed during the challenge will allow the applicant to gain highly sought-after expertise in designing tools for moulding the latest generation of UHMWPE-based composites into complex geometries. This will allow the applicant (and Canada) to become a worldwide leader in the moulding UHMWPE-based composites for personal protective equipment, but also in other areas such as vehicle armour and spacecraft protection.
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