Acetal resins (polyoxymethylene or POM) are engineering thermoplastics based on formaldehyde polymerization technology. These highly crystalline resins are strong, rigid and have a low coefficient of friction against metals, acetals and other plastics. They are creep resistant so they are good for parts where dimensional stability is important.
Acetal resins have high tensile strength, stiffness, resilience, fatigue endurance and moderate toughness. Acetals have high resistance to organic solvents, excellent dimensional stability, a low coefficient of friction and outstanding abrasion resistance among thermoplastics.
Acetals’ resistance to creep is excellent. Moisture, lubricants and solvents including gasoline and gasohol have little effect on this property, which is important in parts incorporating self-threading screws or interference fits.
Good electrical properties qualify these materials for electrical applications requiring long-term stability. Acetal copolymers retain much of their toughness through a broad temperature range and are among the most creepresistant of the crystalline thermoplastics. A low moistureabsorption characteristic permits molded parts to serve reliably in environments involving humidity variations.
Excellent dimensional stability
Continuous use temperature of 180°F
Consistent properties in wet or moist environments
Very low moisture absorption
Excellent electrical properties
Easy to machine to close tolerances
Natural and Black are FDA & USDA compliant
Bushings and bearings
Rollers and gears
Valves and manifolds
Wear strips and pads
Jigs and fixtures
Parts which operate in water between 60 to 90C
ASTM POM 0211, D6778
FDA21 CFR 177.2470
ASTM POM 211, D 6100
Acetal Rod is sold by the foot. Stock Maximum single rod length: 10ft