Overview
High viscosity POM plastic, or polyoxymethylene, is a high-performance engineering thermoplastic known for its exceptional mechanical properties and chemical resistance. It is widely used in industries requiring precision components due to its low friction, high stiffness, and excellent dimensional stability. POM is available in homopolymer and copolymer forms, with high viscosity grades offering improved flow characteristics for complex molding applications. POM plastics are synthesized through the polymerization of formaldehyde, resulting in a material that combines toughness with ease of machining. Its high crystallinity contributes to its strength and resistance to wear, making it a preferred choice for mechanical parts subjected to repetitive stress.
Physical and Chemical Properties
High viscosity POM plastic exhibits a density of approximately 1.41-1.42 g/cm³ and a melting point range of 165-175°C. Its low moisture absorption and high crystallinity ensure minimal dimensional changes in varying environmental conditions. The material is insoluble in water and resistant to most organic solvents, oils, and fuels, making it suitable for harsh chemical environments. POM's mechanical properties include high tensile strength, impact resistance, and fatigue endurance. Its low coefficient of friction and self-lubricating properties reduce wear in moving parts, enhancing longevity. However, POM is susceptible to degradation under prolonged exposure to UV light and strong acids, requiring stabilizers for outdoor applications.
Main Applications
High viscosity POM plastic is extensively used in precision engineering applications, such as gears, bearings, and bushings, where its low friction and wear resistance are critical. The automotive industry utilizes POM for fuel system components, door handles, and seatbelt mechanisms due to its durability and chemical resistance. In consumer goods, POM is found in zippers, fasteners, and kitchen appliance parts. Its electrical insulation properties make it suitable for connectors and insulating components in electronics. Medical devices, such as inhalers and surgical instruments, also benefit from POM's biocompatibility and sterilizability.
Safety and Storage
High viscosity POM plastic should be stored in a cool, dry environment to prevent moisture absorption and degradation. Proper ventilation is essential during processing to avoid inhalation of formaldehyde gas, which may be released at high temperatures. Workers should use protective equipment, such as gloves and masks, when handling POM dust or molten material. POM is not flammable but can combust at high temperatures, releasing toxic gases. Firefighting measures include using water spray, foam, or dry chemical extinguishers. Disposal should follow local regulations, as POM is not biodegradable but can be recycled through specialized processes.
B2B Procurement Guide
When procuring high viscosity POM plastic, B2B buyers should specify the required viscosity grade, mechanical properties, and any additives (e.g., UV stabilizers or lubricants). Request material data sheets and certificates of analysis to ensure compliance with industry standards such as ISO 9988 or ASTM D4181. Supplier reliability is critical; verify their production capacity, lead times, and quality control processes. Consider ordering samples for testing before large-scale purchases. Pricing varies based on quantity, grade, and region, with bulk orders typically offering cost savings. Establish long-term contracts with trusted suppliers to secure consistent quality and pricing.
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