Polyoxymethylene (POM, Acetal, Polyacetal) CAS 9002-81-7

Polyoxymethylene (POM) is one of the engineering plastics with the most comprehensive properties close to those of metals, earning it the nickname "acetal".

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Product Description

Polyoxymethylene (POM) is one of the engineering plastics with the most comprehensive properties close to those of metals, earning it the nickname "acetal". It possesses high rigidity, high hardness, excellent wear resistance and self-lubrication, and good dimensional stability, making it widely used in precision gears, automotive parts, electronics, and industrial machinery. Both copolymer and homopolymer POM are available, with various modified grades such as glass fiber reinforced, high lubricity, weather-resistant, and conductive to meet diverse application needs. Products conform to the national standard GB/T 22271.1-2021, and small-batch trial orders and customized packaging are supported. Leveraging major ports such as Qingdao, Tianjin, and Shanghai, exports are efficient and hassle-free.

Product Information

ItemDescription
Product NamePolyoxymethylene (POM, Acetal, Polyacetal)
CAS No.9002-81-7
AppearanceWhite or off-white opaque granules
Main TypesCopolymer POM (POM-C) : Better heat, chemical and thermal degradation resistance; widely used globally. Suitable for general injection parts, automotive, electronics.
Homopolymer POM (POM-H) : Higher strength, rigidity and wear resistance; lower thermal and chemical stability. Suitable for high-load precision gears and bearings.
Glass-Filled Grade: 10%-25% glass fiber reinforced; significantly improved rigidity and HDT. Suitable for structural and high-temperature parts.
High-Lubricity Grade: PTFE or special lubricants added; extremely low friction coefficient. Suitable for high-wear and low-friction applications.
UV-Stabilized Grade: UV absorbers added for outdoor applications.
Conductive/Antistatic Grade: For electronic components and explosive-proof environments.
Key Physical & Chemical PropertiesDensity: 1.41-1.42 g/cm³; Melting Point: 165-175℃; HDT (1.82MPa): Copolymer approx. 95-110℃, Homopolymer approx. 125℃ (reinforced up to 160℃); Service Temperature: -40℃ to 100℃; Water Absorption: approx. 0.2%.
Typical Performance ParametersMelt Flow Rate: 2-30 g/10min (grade dependent); Tensile Strength: 55-70 MPa; Elongation at Break: 15-40%; Flexural Modulus: 2500-3000 MPa; Notched Impact Strength: 6-10 kJ/m² (reinforced grades higher); Friction Coefficient: very low (self-lubricating); Low abrasion; Excellent dimensional stability.
FeaturesHigh mechanical strength and rigidity, known as "Acetal"; excellent wear resistance, fatigue resistance and self-lubrication (ideal metal replacement); low moisture absorption (~0.2%) with excellent dimensional stability; resistant to organic solvents and fuels; good electrical insulation; POM-C offers better thermal degradation and chemical stability; POM-H offers higher strength and rigidity.
Main ApplicationsPrecision Gears: watch gears, printer/copier gears, automotive window motor gears, office equipment gears.
Automotive Parts: door handles, fuel system components (pump housings, fuel line connectors), seatbelt buckles, seat adjusters, wiper linkages, window regulator gears, air vent mechanisms.
Electronics: switches, relays, keyboard components, bearings, bobbins, phone card trays, connectors, micro motor parts.
Industrial Machinery: conveyor chain links, valves, pump bodies, bearing cages, cams, slides, guides, impellers.
Consumer Goods: zipper pulls, lighters, razors, stationery, toys, kitchen handles, spray valves, faucet cartridges.
Others: medical device parts, sports equipment, pipe fittings, etc.
Packaging25kg woven bags (PE liner); 750kg jumbo bags; custom packaging available.
Storage ConditionsStore in cool, dry, well-ventilated area; avoid direct sunlight; keep sealed to prevent moisture absorption.
Shipping RequirementsNon-hazardous cargo; protect from moisture and rain; handle with care.
Quality StandardsChina: GB/T 22271.1-2021; FDA, REACH, RoHS compliance available.


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Q4: How do you guarantee product quality?
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