Polyoxymethylene Copolymer (POM-C)

Aceta POM-C Polyoxymethylene Copolymer

Polyoxymethylene Copolymer (POM-C) is a high-performance engineering plastic known for its excellent mechanical properties, low friction, and high dimensional stability. This article aims to provide a detailed overview of POM-C, exploring its properties, applications, advantages, and processing methods.

Table of Contents

  1. Introduction to POM-C
  2. Properties of POM-C
  3. Applications of POM-C
  4. Advantages of POM-C
  5. Processing and Machining of POM-C
  6. Conclusion


1. Introduction to POM-C

Polyoxymethylene Copolymer (POM-C), also known as Acetal Copolymer, is a thermoplastic material derived from formaldehyde. POM-C is recognized for its strength, rigidity, and ease of machining, making it a preferred choice in various industrial applications. Unlike its homopolymer counterpart (POM-H), POM-C offers improved chemical resistance and greater dimensional stability.


2. Properties of POM-C

Mechanical Properties

  • High Strength and Stiffness: POM-C is known for its high tensile strength and stiffness, which makes it suitable for parts requiring high mechanical performance.
  • Low Friction: It has a low coefficient of friction, providing excellent wear resistance and smooth operation in moving parts.

Thermal Properties

  • Thermal Stability: POM-C can withstand a wide range of temperatures, typically from -40°C to 120°C, without significant loss of properties.
  • Low Water Absorption: The material has low water absorption, which contributes to its dimensional stability and consistent performance in humid environments.

Chemical Properties

  • Chemical Resistance: POM-C exhibits good resistance to a variety of chemicals, including solvents, fuels, and oils, but it is not resistant to strong acids and bases.
  • Low Moisture Absorption: This property ensures that the mechanical properties of POM-C remain stable in moist or humid conditions.

Electrical Properties

  • Insulating Properties: POM-C is an excellent electrical insulator, making it suitable for electrical and electronic components.


3. Applications of POM-C

Automotive Industry

  • Gears and Bearings: Due to its low friction and wear resistance, POM-C is commonly used in gears and bearing applications.
  • Fuel System Components: Its chemical resistance makes it ideal for fuel system parts.

Consumer Goods

  • Fasteners: POM-C is used to manufacture various fasteners like screws and nuts due to its strength and ease of machining.
  • Household Appliances: Components in coffee machines, dishwashers, and washing machines often use POM-C.

Industrial Applications

  • Machine Parts: POM-C's dimensional stability and strength make it suitable for precision machine parts.
  • Conveyor Belt Components: Its low friction and wear resistance are advantageous in conveyor belt systems.

Electrical and Electronics

  • Insulating Components: Due to its excellent electrical insulating properties, POM-C is used in various electrical insulating components.


4. Advantages of POM-C

  • Machinability: POM-C is easy to machine, allowing for precise manufacturing of complex parts.
  • Dimensional Stability: Low water absorption and thermal stability ensure that POM-C parts maintain their dimensions over time.
  • Surface Quality: The material can achieve a high-quality surface finish, which is beneficial for aesthetic and functional applications.
  • Fatigue Resistance: POM-C demonstrates good fatigue resistance, making it ideal for parts subjected to cyclic loading.


5. Processing and Machining of POM-C

Injection Molding

  • Temperature Control: Proper temperature control is crucial during the injection molding process to prevent degradation of the material.
  • Tool Design: Tools should be designed to minimize stress concentrations and ensure smooth flow of the material.

CNC Machining

  • Cutting Tools: Use sharp cutting tools to avoid inducing stresses and ensure a smooth finish.
  • Cooling: Proper cooling techniques should be employed to prevent overheating and deformation during machining.


  • Consistency: The extrusion process should be carefully controlled to maintain consistent dimensions and properties in the final product.

6. Conclusion

Polyoxymethylene Copolymer (POM-C) is a versatile and high-performance plastic that offers a unique combination of strength, stability, and machinability. Its diverse properties make it suitable for a wide range of applications across various industries. Whether in automotive components, consumer goods, or industrial machinery, POM-C continues to be a material of choice for engineers and designers seeking reliable and efficient solutions.

By understanding the properties, applications, and processing methods of POM-C, manufacturers can make informed decisions and optimize the use of this exceptional material in their products.


This comprehensive guide provides an in-depth look at POM-C, highlighting its key features and benefits. Whether you are an engineer, designer, or manufacturer, this information will help you leverage the advantages of POM-C in your project

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