Which is better, POM material or nylon material?

2024-08-27
When selecting engineering plastics, POM and NYLON (PA) are often compared side by side. Both are high-performance materials offering excellent mechanical properties and wear resistance. However, in applications with more complex scenarios, higher structural demands, or harsher environmental conditions, NYLON typically emerges as the superior choice overall.
Below, we present a rational comparison, focusing on clarifying why NYLON is increasingly favored in engineering applications.

I. Fundamental Performance Comparison: Which One Offers More Comprehensive Capabilities?

Advantages of Polyoxymethylene (POM):
  • High rigidity, high dimensional stability
  • Low coefficient of friction
  • Excellent wear resistance
  • Low moisture absorption
Due to its excellent lubricity and wear resistance, POM is commonly used in applications requiring low friction coefficients, such as bearings, gears, pulleys, and zippers. However, its performance in other areas—including strength, tensile properties, and hydrolysis resistance—is relatively poor, resulting in a more limited range of applications.
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POM applications 

The advantages of polyamide (NYLON) are more comprehensive:

  1. Higher structural strength

    • Unreinforced PA materials exhibit tensile moduli ranging from 60 to 90 MPa and flexural moduli from 80 to 120 MPa. Glass-fiber-reinforced nylon (GF PA) typically achieves tensile moduli exceeding 150 MPa and flexural moduli surpassing 220 MPa—significantly higher than POM materials.

    • More suitable for load-bearing structural components, not just small moving parts.

  2. Superior high-temperature resistance

    • POM tends to degrade and lose performance in prolonged high-temperature applications, while also releasing toxic substances. Nylon inherently possesses excellent high-temperature resistance, enabling long-term use in environments exceeding 100°C. Glass-fiber-reinforced PA materials can withstand short-term exposure to temperatures above 200°C.

    • More stable in high-temperature environments such as around engines and electrical structural components.

  3. Enhanced impact resistance

    • Especially in low-temperature environments, nylon demonstrates more reliable toughness.

  4. Greater scope for modification

    • Polyamide exhibits good compatibility with various inorganic and organic materials, enabling applications such as glass fiber reinforcement, mineral filling, flame retardant modification, and UV resistance modification.

    • Customizable to different grades to meet the needs of multiple industries, including automotive, electronics, power tools, and machinery.

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PA application 

⚠️From the application scenarios of these materials, we can see that POM is more suited for precision components and applications requiring high lubricity and low friction. Nylon, on the other hand, has a broader range of applications and is a more versatile engineering structural plastic.

2、Application Layer Comparison: Which Offers Greater Growth Potential?

Application Areas Better Choice
Precision Gears POM
Bearings, Sliders POM
Structural components, load-bearing components NYLON
Automotive components NYLON
Electrical structural components NYLON
High-temperature environment NYLON

From the perspective of growth industries:

  • Automotive lightweighting
  • New energy equipment
  • Industrial automation
  • Power tools

These sectors increasingly favor reinforced nylon, particularly glass fiber-reinforced (GF PA material), which finds extensive applications in structural and high-temperature environments.

Conclusion: If only one material with superior overall capabilities is to be selected—prioritize NYLON.

Although POM excels in lubrication and wear resistance, its performance in other areas is subpar, resulting in extremely limited applications.

If your product targets:

  • Automotive

  • Electronics and Electrical Systems

  • Industrial Equipment

  • Outdoor Structural Components

  • High-Temperature or High-Strength Applications

Therefore, NYLON warrants priority consideration, Custom-modified nylon will significantly enhance the material's properties.

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