Within the vast realm of plastics, Ertacetal (Acetal) holds a significant place within the thermoplastic family. Known chemically as "PolyOxyMethylene," or POM, this material is widely recognized for its versatility and durability. Ertacetal is typically available in two primary forms: Copolymer Acetal (POM-C) and Homopolymer Acetal (POM-H), with the latter being commonly referred to as Delrin®. At Ai Plastics, we offer both variants in various dimensions, custom-cut to meet specific needs.

The Key Differences

Ertacetal C (Acetal C)

This copolymer variant provides excellent performance at a slightly reduced cost compared to Acetal H/Delrin. Despite the minor difference in price, the performance characteristics are quite comparable. However, Ertacetal C boasts lower stress levels and higher tensile strength, ensuring flatness and dimensional stability up to a maximum temperature of 100 degrees Celsius. Here at Ai Plastics, we provide Ertacetal C in rod and sheet formats, suitable for food applications as it meets FDA approval standards. This material is available in both black and natural colors.

Additional benefits include:

• Superior dimensional stability due to its lower crystallinity levels.
• Enhanced resistance to hot water and strong alkaline substances, or high pH solutions.
• Lower coefficient of friction and improved impact and wear resistance, particularly beneficial in wet or humid environments.

Ertacetal H / Acetal

Ertacetal (Acetal) Homopolymer offers slightly enhanced mechanical properties over Ertacetal C. It exhibits greater stiffness, with a higher flexural modulus at both room and elevated temperatures. Additionally, it demonstrates slightly higher tensile and impact strength at room temperatures, along with better wear resistance compared to the copolymer. Notable features of Ertacetal H include:

• Increased stiffness, offering superior flexural modulus at room and elevated temperatures.
• Marginally higher tensile and impact strength at room temperatures and below.
• Harder texture, resulting in a lower coefficient of friction.

The Shared Traits

In most scenarios, Ertacetal homopolymer and copolymer can be interchanged due to their material properties being approximately 10% similar. A key characteristic shared by both grades is the ease of machining. Unlike many other engineering plastics, Ertacetal C and Ertacetal H maintain their shape during machining and resist chipping, making them ideal for precision work.

Both grades are renowned for their high mechanical strength, low thermal expansion, low water absorption, and excellent creep resistance. Their inherent lubricity enhances abrasion resistance and reduces the coefficient of friction significantly.

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Common Applications

Owing to their unique blend of properties such as lubricity, strength, chemical resistance, and ease of machining, Ertacetal (Acetal-C and Acetal-H) finds application across numerous industries. Typical uses include:

• Components for conveyor systems
• Automotive and fuel system parts
• Sliding and guiding mechanisms
• Gears and bearings
• Zippers
• Electrical components and insulation
• Winter sports equipment
• Pump and valve parts

Need Assistance?

If you require technical guidance regarding Ertacetal C and Ertacetal H, feel free to reach out to us at 0161 727 0255 or download our datasheets from our website. Alternatively, send your queries to .

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