Ultra High Molecular weight polyethylene, it is commonly abbreviate UHMWPE, is a subset of thermoplastic engineering plastic, it has extremely long chains with a molecular mass usually between 2-6 million.
UHMWPE retains key physical properties and high impact strength,even at low temperatures down to -200°C. This excellent general purpose plastic with self lubricating properties offers noise reduction and low friction surface.
UHMWPE board is a typical soft and tough polymer. Except for higher impact strength, other mechanical properties are lower in plastic materials. The density of PE board increases, and the mechanical properties except toughness are improved. LDPE board has a low degree of branching, low crystallinity, low density, low mechanical properties, but good toughness and impact resistance. HDPE board has small branching degree, high crystallinity, high density, high tensile strength, stiffness and hardness, and poor toughness. As the relative molecular weight increases, the force between molecular chains increases accordingly, and all mechanical properties, including toughness, are also improved.
UHMW-PE fiber is the third-generation special fiber in the world today. Its strength is as high as 30.8cN/dtex, and its specific strength is the highest among chemical fibers. It also has good wear resistance, impact resistance, corrosion resistance and light resistance. It can be directly made into ropes, cables, fishing nets and various fabrics: bulletproof vests and clothes, cut-resistant gloves, etc. The bulletproof effect of bulletproof vests is better than that of aramid. Internationally, ultra-high molecular weight polyethylene (UHMW-PE) fibers have been woven into ropes of different deniers, replacing traditional steel cables and synthetic fiber ropes. Ultra-high molecular weight polyethylene (UHMW-PE) fiber composite materials have been used in the military as armored weapon shells, radar protective shell covers, helmets, etc.; sporting goods have been made into bowstrings, skis, and water skis.
Lubricating extrusion (injection) molding technology is to form a lubricating layer between the extruded (injected) material and the mold wall, thereby reducing the difference in shear rate between various points of the material, reducing product deformation, and achieving low temperature , Increase the extrusion (injection) speed of high-viscosity polymers under low energy consumption conditions. There are two main methods for producing a lubricating layer: self-lubricating and co-lubricating.
The self-lubricating extrusion (injection) of ultra-high molecular weight polyethylene (UHMW-PE) is to add an appropriate amount of external lubricant to reduce the friction and shear between polymer molecules and the metal mold wall, and improve the uniformity of material flow And demoulding effect and extrusion quality. External lubricants mainly include higher fatty acids, compound greases, silicone resins, paraffin wax and other low molecular weight resins. Before extrusion (injection) processing, the lubricant and other processing aids are mixed into the material first. During production, the lubricant in the material oozes out to form a lubricating layer to realize self-lubricating extrusion (injection).
Standard size:
5040x1330mm, 4730x1230mm, 3050x1220mm, 6050x1820mm, 3030x1550mm,
4520x2000mm, 3050x3050mm, 2000x1000mm, 6000x2000mm.
Thickness can be made 6-300mm.
Other size can be made according to the customized requests.
The properties of UHMWPE:
Features
1. Low friction coefficient, high wear resistance, high impact resistant.
2.Excellent chemical stability. It can improve the corrosion resistance and anti-static performance by adjusting the formula.
3.The temperature range: -150℃ to 85℃
4.Low water absorption.
5.Coefficient of thermal expansion: The environment temperature ≥100C,Thermal deformation size 2-3%.
