Delrin and nylon

Popular Engineering Materials: Delrin and Nylon

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In the world of manufacturing and molding materials, Delrin and Nylon are frequently mentioned. These engineering polymers have garnered widespread recognition for their exceptional properties and diverse applications, sparking debates about which one reigns supreme in various scenarios. In this post, we will explore their mechanical prowess to their application versatility, We’ll delve into the advantages, disadvantages, and unique attributes that define each material. Our aim is to equip you with the knowledge needed to make informed decisions when selecting the ideal material for your molding and manufacturing projects.

What is Delrin?

Delrin is a brand name for POM, which is a type of high-performance engineering plastic. DuPont, the company that developed POM, initially used the brand name Delrin to market its POM products. Over time, the term Delrin became widely associated with POM.


Delrin (POM) is widely used in various industries, including manufacturing and molding. It is known for its excellent combination of mechanical properties, low friction, and dimensional stability. Delrin is often used in applications where precision and durability are important.


In the context of molding manufacturing, Delrin can be used as a material for injection molding. It is particularly suitable for producing parts that require tight tolerances, low friction, and resistance to wear. Some common applications of Delrin include gears, bearings, bushings, and other components in machinery and equipment.

What is Nylon?

Nylon is a brand name for POM, which is a type of high-performance engineering plastic. DuPont, the company that developed POM, initially used the brand name Delrin to market its POM products. Over time, the term Delrin became widely associated with POM.


“Nylon” and “PA” (which stands for polyamide) are often used interchangeably to refer to the same type of synthetic polymer. Nylon is a specific brand name for certain types of polyamides from Dupont. PA is the more general term used to describe the entire class of polyamide materials.


Nylon(PA) is known for its excellent mechanical properties, including high strength, toughness, and resistance to wear. They also have good chemical resistance and can maintain their properties in various environments. These characteristics make them popular choices for a wide range of applications, including molding and manufacturing.

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Delrin Advantages and Disadvantages

Delrin (POM) and nylon offer distinct merits in the manufacturing realm. Let’s examine the advantages and disadvantages of Delrin:

Advantages of Delrin(POM):

  • Stiffness and Precision: Delrin excels in applications demanding high stiffness and dimensional accuracy.


  • Low Friction: Its low friction coefficient ensures smooth motion and reduced wear.


  • Moisture Resistance: Delrin’s low moisture absorption maintains stability across varying conditions.


  • Machinability: Delrin’s excellent machinability allows for intricate and precise component fabrication.


  • Chemical Resilience: It showcases good resistance to solvents, oils, and fuels, enhancing longevity.

Disadvantages of Delrin(POM):

  • Lower Toughness: In rugged applications, Delrin may not match the toughness of materials like nylon.


  • Temperature Range: Delrin is better suited for lower to moderate-temperature environments.


  • Cold Brittleness: It can become brittle in cold temperatures, affecting its mechanical performance.

Nylon(PA) Advantages and Disadvantages

In the manufacturing landscape, nylon and Delrin (POM) shine with unique qualities. Let’s delve into the advantages and disadvantages of nylon:

Advantages of Nylon(PA):

  • Toughness and Resilience: Nylon’s exceptional impact resistance and toughness suit rugged applications.


  • Wear Resistance: Its ability to withstand wear and abrasion prolongs component’s lifespan.


  • Versatility in Design: Nylon’s ease of processing allows for intricate shapes, accommodating diverse design needs.


  • Chemical Compatibility: Nylon’s resistance to various chemicals adapts to varied environmental conditions.


  • Elevated Temperatures: Nylon can handle higher temperatures compared to Delrin.

Disadvantages of Nylon(PA):

  • Moisture Absorption: High moisture absorption may lead to dimensional changes and reduced mechanical performance.


  • Dimensional Changes: Moisture absorption can affect part dimensions over time.


  • Chemical Swelling: Exposure to certain chemicals can cause swelling or degradation.


  • Limited Stiffness: Nylon’s stiffness may be lower than materials like Delrin, impacting specific applications.

Applications Of Delrin(POM) Vs Nylon(PA)

Nylon and Delrin (POM) find their way into numerous applications, each leveraging their unique properties. Let’s explore where these materials excel:

Nylon(PA) Applications:

  • Automotive Industry: Nylon’s toughness makes it suitable for components like gears, bearings, and engine parts.


  • Consumer Goods: It’s used in products ranging from zippers and buttons to kitchen utensils and sports equipment.


  • Industrial Machinery: Nylon’s wear resistance is valuable for conveyor belts, rollers, and industrial components.


  • Electrical Applications: Its electrical insulation properties make it apt for connectors and insulating parts.


  • Medical Devices: Nylon’s compatibility with sterilization methods suits applications in medical equipment.

Delrin (POM) Applications:

  • Precision Engineering: Delrin’s dimensional stability suits gears, bearings, and precision components.


  • Automotive Industry: Its low friction and moisture resistance make it ideal for fuel system components and bushings.


  • Consumer Products: Delrin is used in items like door handles, locks, and mechanical parts.


  • Industrial Applications: It’s applied in conveyor system components and machinery requiring low friction.


  • Medical Devices: Delrin’s machinability is advantageous in medical devices requiring precision.

Delrin(POM) vs Nylon(PA) Property

Property / Characteristic


Delrin (POM)

Mechanical Strength

Tough, impact-resistant

Stiff, high dimensional stability

Friction & Wear Resistance

High wear resistance, moderate friction

Low friction, good wear resistance

Moisture Absorption

High moisture absorption

Low moisture absorption

Chemical Resistance

Resistant to many chemicals

Good resistance to solvents, oils, fuels


Easily machinable into complex shapes

Precise machining capabilities

Temperature Range

Suitable for higher temperatures

Ideal for low to moderate temperatures

Delrin(POM) vs Nylon(PA): Making the Right Choice for Your Project

The question of whether nylon or Delrin (POM) is the best material depends on the specific requirements of your application. Each material has its strengths and limitations, catering to different scenarios. Let’s compare their attributes to help you make an informed decision:


Choose Delrin (POM) If:

  • Precision is paramount, as Delrin excels in high stiffness and dimensional accuracy.
  • Low friction and wear resistance are crucial for smooth and efficient motion.
  • Your application demands moisture resistance, maintaining stability in varying environments.
  • Machining intricacies call for precise component fabrication.
  • Chemical resistance to solvents, oils, and fuels is vital for durability.


Choose Nylon(PA) If:

  • Ruggedness and impact resistance are essential for your application.
  • Wear resistance against abrasion and external forces is critical.
  • Versatile design possibilities are needed through ease of processing.
  • Your application requires higher temperature tolerance.
  • Chemical compatibility is necessary, albeit with potential dimensional changes due to moisture absorption.


Delrin’s characteristics are precision, stability, low friction, and machinability. On the other hand, nylon’s resilience and versatility find their place in rugged scenarios, boasting toughness and ease of processing. Whether it’s precision engineering, industrial machinery, automotive components, or consumer goods, the decision between Delrin and nylon hinges on factors like mechanical demands, temperature ranges, chemical exposure, and budget constraints.


Ultimately, the best choice is one that aligns with your application’s goals and priorities, ensuring the synergy of material and purpose for a successful project.

Zhongde is a professional Chinese custom molding manufacturer. We offer a wide range of materials and the material expert will help our customers choose suitable material for the project. 


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