Overview
POM Copolymer, or Polyoxymethylene, is a thermoplastic polymer widely used in precision engineering due to its exceptional mechanical properties. It is synthesized through the polymerization of formaldehyde, resulting in a material with high crystallinity and dimensional stability. Compared to homopolymer POM, the copolymer variant offers improved thermal and chemical resistance, making it suitable for demanding applications. Its balanced properties include low moisture absorption and excellent fatigue resistance, ensuring long-term performance in dynamic environments.
Physical and Chemical Properties
POM Copolymer exhibits a density of 1.41-1.42 g/cm³ and a melting point range of 160-175°C. Its high crystallinity contributes to its rigidity and strength, while its low coefficient of friction makes it ideal for moving parts. The material is chemically resistant to hydrocarbons, alcohols, and weak acids but may degrade when exposed to strong acids or bases. Its insolubility in water and most solvents ensures stability in humid or wet conditions, though prolonged UV exposure can cause degradation without stabilizers.
Main Applications
POM Copolymer is a staple in automotive, electronics, and consumer goods industries. Common uses include gears, bushings, and conveyor belts, where its wear resistance reduces maintenance needs. In medical devices, FDA-compliant grades are used for components like insulin pens. The material's electrical insulation properties also make it suitable for connectors and housings in electronics. Its machinability allows for tight tolerances in custom parts.
Safety and Storage
POM Copolymer is generally safe but requires precautions during processing. Dust generated during machining may irritate respiratory tracts; adequate ventilation and PPE are recommended. Storage should be in sealed containers away from moisture and direct sunlight to prevent degradation. Bulk procurement may require humidity-controlled environments to maintain material integrity. Fire hazards are minimal, but decomposition at high temperatures can release formaldehyde.
B2B Procurement Guide
When sourcing POM Copolymer, specify the grade (e.g., standard, lubricated, or UV-stabilized) and any certifications (e.g., FDA, RoHS). Prices typically range from $2.5 to $4.5 per kilogram, with discounts for large orders. Verify supplier reliability through material datasheets and batch testing. Lead times vary but are commonly 2-6 weeks. For custom formulations, collaborate with manufacturers to ensure compliance with application requirements, such as colorants or reinforcing additives.
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