The technical parameters of ultra-high molecular weight polyethylene sheet include the following aspects:
Physical properties:
Density: 0.920-0.964 g/cm³.
Heat deformation temperature: 85°C.
Melting point: 130-136°C.
Molecular weight: 3-6 million.
Tensile strength at break: 40 MPa.
Elongation at break: 350%.
Flexural modulus: 600 MPa.
Abrasion loss: 20 mm.
Mechanical properties:
Wear resistance: The best among plastics, exceeding some metals, the mortar abrasion index is only 1/5 of PA66, 1/10 of HDPE and PVC, 1/7 of carbon steel, and 1/27 of brass.
Impact strength: about 2 times that of impact-resistant PC, 5 times that of ABS, and more than 10 times that of POM and PBTP.
Self-lubricating property: It has an extremely low friction coefficient (0.05-0.11), excellent self-lubricating property, second only to polytetrafluoroethylene (PTFE).
Chemical resistance: Excellent, except for strong fluorinated acid, it can resist corrosive media (acids, alkalis, salts) and organic media (except naphthalene solvents) within a certain temperature and concentration range.
Impact energy absorption: Excellent, the impact energy absorption value is the highest among all plastics, and it has excellent sound-absorbing effect.
Non-stickiness: The surface adsorption force is weak, and the anti-adhesion ability is second only to polytetrafluoroethylene (PTFE).
Hydrophobicity: The water absorption rate is very low, generally less than 0.01%.
Processing performance:
Processing method: In the early days, it was mainly formed by pressing and sintering methods, and it can also be processed by extrusion, injection molding and blow molding methods.
Poor fluidity: The viscosity is extremely high in the molten state, and it is a highly viscous elastic body that is rubber-like.