POM•Polyoxymethylene(Delrin)
English Name: Polyformaldehyde, Abbreviation: POM or Acetal. Polyoxymethylene is a high melting point, high crystalline plastic. It can be divided into copolymer and homopolymer types, with POM-C copolymer being the most commonly used semi-finished product in the market. POM has excellent comprehensive properties and a smooth, glossy surface, making it very suitable for machining, particularly for manufacturing precision parts. It can be used for long periods within a temperature range of -40 to 100°C.
Copolymers of polyoxymethylene (POM-C) have stronger hydrolytic stability, resistance to strong bases, and thermal oxidative degradation resistance compared to homopolymer formaldehyde. Homopolymer polyoxymethylene (POM-H) has higher mechanical strength, rigidity, hardness, and creep resistance, as well as a lower coefficient of thermal expansion, while also offering better wear resistance.
Delrin® AF is a blend of POM-H and PTFE. It is softer than pure POM-H, has reduced stiffness, and is smoother. This material provides superior sliding performance.
Superior Properties:
· High mechanical strength, rigidity, and hardness
· Toughness and good creep resistance
· Maintains high impact strength even under low temperature conditions
· Low water absorption, good dimensional stability
· Good sliding properties and wear resistance
· Excellent electrical insulation and dielectric properties
· Superior machinability
· Physiologically inert, can come into contact with food
· Good oil resistance and peroxide resistance.
Disadvantages:
· Not resistant to acids and strong bases
· Not resistant to ultraviolet radiation from sunlight
· Non-flame retardant, cannot be exposed to fire.
Applications:
POM is widely used in the manufacture of various sliding and rotating machinery and precision parts such as: rollers, guide wheels, gears, bearings, bushings, fixtures, levers, handles, etc. It is employed across industries such as automotive, electronics, garment making, medical, machinery, and sports equipment.
Conventional Stock Specifications:
Sheets: (0.5-1) x 1000 x 50M; (1-60) x 1000 x 2000mm; (8-150) x 610 x 1220mm;
Rod: (5-250) x 1000mm;
Tube: (25-500) x (10-375) x 1000mm
Colors: White, Black. Other colors can be customized.
Modified Products: Enhanced sliding (Delrin® AF), anti-static, glass fiber reinforced, POM+PE, medical grade, etc.
