What is Delrin?

Among so many materials utilized in product manufacturing, metals have high tensile strength and rigidity. However, technological advancement has easily replaced metals with lightweight polymers. An outstanding example is Delrin material which has loads of properties.

In this article, we’ll understand everything about Delrin material.

What is Delrin Material?
Delrin, also called Polyoxymethylene (POM) or acetal, is an engineering thermoplastic utilized in manufacturing plastic parts with improved strength, stability, and stiffness. It is a semi-crystalline and wear-resistant thermoplastic suitable in numerous machining processes, especially in creating plastic Delrin parts for substituting metals.

Features of Delrin Material
Delrin is the perfect material for manufacturing plastic parts. Its properties additionally make it an ideal alternative to plastic and metal in the production of parts. Below are essential Delrin material properties:

  • Repeated Impact Resistance
  • High Mechanical Strength and Durability
  • Strong Creep Resistance
  • Resistant to Solvents and Organic Chemicals
  • Low Friction Coefficient
  • Stable in Low Temperature
  • Good Shock Resistance
  • Natural grade is FDA, NSF, and USDA compliant
  • Superior impact and creep resistance
  • Low moisture retention: Delrin can work in wet environments with little effect on dimensions or performance

Application of Delrin
Delrin is preferred in several processes as it offers high wear resistance and assures a low friction coefficient. Delrin material has been preferred as an easy replacement for metals to facilitate corrosion resistance, single-stage parts manufacturing, and lightweight products without the need for different machining steps.

Across the world, leading companies employ injection-molded Delrin parts for high-load mechanical processes and the manufacture of various durable products such as:

  • Safety restraint components
  • Sliding & Guiding Parts
  • Gears
  • Door system components
  • Medical delivery devices

Why Choose Delrin?
Apart from the above-listed benefits, there are other reasons to choose acetal over other materials. As compared to other plastics, acetal offers excellent impact, creep, chemical resistance, higher strength, and better dimensional stability. It additionally has a lower coefficient of friction.

Acetal outpaces particular metals as well. Parts manufactured with this material have a higher strength-to-weight ratio, better corrosion resistance, and more parts consolidation opportunities. You can build thinner and lighter parts quickly and at a lower price with acetal than any other metal.

Delrin plastic can be used in almost every primary manufacturing sector. Typical applications in the automotive industry include fuel system components, heavy load-bearing gears, loudspeaker grilles, and safety system elements such as seatbelt hardware. Delrin can additionally be found in all-purpose industrial equipment such as gears, bearings, meters, and pumps. This material can make anything from zippers and pens to knife handles and lawn sprinklers when used in consumer goods and appliances.

Advantages of Machining Delrin Material
Because of its unique mechanical properties, Delrin offers several advantages, as shown below:

  • Machinability: Delrin has unique properties that make it easy to work on and process with conventional or advanced machinery. Further, it gives better flow rates than other resins, allowing a more consistent filling of thin walls in the mold.
  • High Strain and Stress Capacity: Compared to metals, Delrin possesses exceptional spring-back characteristics. Further, its spring-back and high strain capacity make it perfect for snap-fit and buckle purposes.
  • Low Weight: Compared to metals, Delrin is light and can hold high tensile strength. It can resist impact and repeated shock loads.
  • Strength: Delrin is a fatigue-resistant polymer. Its high mechanical strength and rigidity make it suitable to produce a wide range of high-performance Delrin parts with long service lifecycles.
  • Moisture Resistant: Delrin is a non-moisture absorbable material and can be used for applications in humid conditions. It is additionally resistant to organic solvents like petrol and other chemical solvents. Further, its moisture resistance makes it corrosion-resistant. Thus, it is an ideal material for countless industrial processes.
  • Low Friction Coefficient: Delrin is appropriate for the manufacture of sliding and moving parts that require no maintenance. Moreover, its natural lubricity makes it a reliable choice for parts that require little or no friction during use.

Disadvantages of Using Delrin in Manufacturing
Delrin also has certain limitations, which do not allow its full adoption in product manufacturing. Below are some of its disadvantages:

  • Poor Adhesion: Due to its chemical properties, Delrin is quite challenging in bonding to one another. Hence, the usage of adhesives like epoxies and polyurethane have been applied to bond Delrin. However, this demands the services of adhesive experts, which increases expenses.
  • Flammable: Delrin is a flammable material. The burning material can’t be extinguished except with the use of a Class A fire extinguisher.
    Machining Delrin is a delicate method that experts must handle. It is essential to trust a company with Delrin machinability knowledge and competence to deliver the best machining process. With us at Truventor, you have an assurance of quality products. You can also consult with our team of experts for manufacturing advice. If you already have a CAD file, just upload it now to get an instant quote for your design.

When to Use Delrin Material
It is vital to understand when to use a Delrin to produce parts to achieve the best outcomes. Delrin material should be utilized:

  • When it is crucial to retain the physical characteristics and dimensional stability of the manufacturing part in humid environments
  • When there is a sliding or back-and-forth motion between plastic or metal parts
  • To prevent corrosion when parts interact with weak acids, water, and industrial solvents.
  • When the part needs to be lightweight
  • If lubrication needed to be avoided in the part
  • When the part should support high impact load

When Not to utilize Delrin Material
Delrin has a broad application in different industries. However, you must not use Delring under the following situations:

  • Temperatures more than 90°C to avoid the burning of the part
  • Strongly acidic or just basic environment (4< pH >9) since the strong acid or base would damage the part.
  • When the Delrin parts interact with industrial fuels with acidic properties


Are Acetal and Delrin the Same Thing?
Delrin is a kind of acetyl plastic and, thus, largely interchangeable with other acetal plastics. Also, Delrin offers the same core benefits as other acetyl plastics.

This leads to numerous differences between these two materials, for instance:

  • Hardness: Delrin will have a somewhat higher hardness than other acetal plastics.
  • Chemical resistance: Acetal has great resistance to the effects of hot water and acidic solid solutions than Delrin.
  • Temperature tolerance: Both Delrin and Acetal are not designed to be used in high-temperature applications and, as such, don’t have high-temperature tolerance.
  • Flexural yield strength and tensile strength: One of the significant differences between the two is that Delrin does tend to have a significantly higher yield strength and tensile strength.

What is Delrin Good for?
Delrin is perfect for mechanical and industrial applications. This is specifically true for applications where the parts will be exposed to moisture or kept in a wet environment. Other appropriate uses involve bearings, bushings, gears, rollers, fittings, electrical insulator parts, and general CNC machining applications.

Can Delrin Plastic Be Glued?
Since Delrin and other acetal plastics have very low friction surfaces, they can be hard to penetrate and glue. Generally, solvent-based glues do not melt on the surface of Delrin plastics well.

Can you 3D Print Delrin?
Yes, Delrin can be 3D printed. Most of its 3D printing applications are high-performance engineering components like gears and bearings.

Can You Mold Delrin?
It’s absolutely possible to mold Delrin, and the resin is molded across the world in various types and designs of injection equipment.

Can You Recycle Delrin?
Yes, Delrin can be recycled. Further, as a thermoplastic, the melting and setting of Delrin can be repeated infinitely so the plastic can be melted down and re-molded into other important parts.

Delrin has proven to be an ideal alternative to metals and plastics in the production of parts. Fortunately, it has seen mass adoption in various industrial processes.

When you partner with Truventor, you partner with a team of on-demand manufacturing experts who have years of experience helping product teams navigate the material selection. We’re well-versed with the broad range of materials that can be utilized for both traditional and additive manufacturing — including Delrin.

Once you’ve selected the Delrin formulation, our team of experts can help facilitate the entire manufacturing process — from design and prototyping to production and fulfillment. With a complete suite of manufacturing services, including CNC machining and injection molding, Truventor can bring your vision to life quickly and easily. Contact us today to get started.

Get a quick quote on your injection molding project.

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