Delrin, also known as Polyoxymethylene (POM), is a high-performance acetal resin with several desirable physical and mechanical properties. This highly-crystalline engineered thermoplastic is widely regarded for its durability, stiffness, and exceptional dimensional stability.
These characteristics make Delrin ideal for high-load and high-impact applications such as gears, conveyor belts, bearings, rollers, and safety restraints. Additional low moisture absorption and tribological properties lend themselves to the construction of items in wet or moist environments such as pumps, valves, and actuators.
Delrin sheets, tubes, and rods can be cut and machined to required lengths and shapes to create a variety of parts and components.
What Are The Benefits of Using Delrin?
Delrin offers a balance of the exceptional properties found in metals and plastics. Specifically, the material offers:
High strength and stiffness properties – Delrin boasts an impressive compressive strength of 5200 psi (by comparison, concrete has a compressive strength between 2500 psi and 4000 psi). This property, combined with its high stiffness, makes Delrin ideal for high-impact and heavy load carrying applications.
Superior dimensional stability – Capable of maintaining its original shape and dimensions when subjected to changes in temperature and humidity, Delrin is especially useful in applications that are sensitive to dimensional changes, such as gears and bearings.
Low moisture absorption – Delrin’s resistance to moisture allows the material to maintain its physical and mechanical properties even when operating in environments with high levels of moisture and humidity. Pumps, valves, and plumbing fixtures are just some examples of components that can benefit from Delrin construction.
Excellent impact and creep resistance – Heavily loaded applications require materials that are exceptionally durable under extreme stress. Delrin’s impact and creep resistance contribute to its ability to resist denting and time-dependent deformation under heavy loads.
Chemical resistance to fuels and solvents – Delrin’s resistance to fuels and solvents allow it to operate in petroleum-based applications without property degradation or deterioration, making it particularly suitable for piping, tank, and vessel fittings in the petrochemical industry.
Excellent machinability – Despite its high strength and stiffness, Delrin can be easily cut into any desired shape using a variety of tools.
Exceptional wear and abrasion properties – The material is also widely regarded for its resistance to wear and abrasion, which is especially crucial in gears where components are frequently in contact with one other. Delrin fittings can also be used in piping systems used to convey abrasive material. This material also possesses a relatively low coefficient of friction, thus minimizing friction between moving parts.
Applications of Delrin
The composition and properties of Delrin make it the material of choice for many industrial applications. Because it is available in a range of special grades, the material can be used to accommodate diverse and unique customer requirements.
Delrin is currently used in numerous sectors including the automotive, electrical, electronics, food production, and petrochemical industries. Delrin rods, tubes, and sheets are available for a wide range of uses including:
High load mechanical applications
Applications exposed to the external environment
Pumps and valves
Fuel system components
Electrical insulator parts and components
Delrin® from Emco
Emco Industrial Plastics, Inc. is a leading provider of high quality machined and fabricated plastic components for a variety of industries. We work with a wide range of materials, including Delrin, to produce products that can be used in any application in almost any environment.
DELRIN®100AF blend stock shapes are a 13% PTFE fiber filled homopolymer acetal. They offer an improved coefficient of friction, better lubricity, and improved wear characteristics over unfilled and PTFE powder filled acetals.
Delrin® AF Blend is a unique thermoplastic material for use in moving parts in which low friction and long wear life are important. It is a combination of PTFE fibers uniformly dispersed in Delrin® acetal resin.
UNITAL® Acetal (polyoxy-methylene) offers design engineers a superior blend of strength, stiffness, lubricity, and dimensional stability. These properties, along with inherent machining ease, have made UNITAL one of the most widely used engineering grade thermoplastics.
Delrin® 500AF is a medium viscosity acetal homopolymer resin containing 20% Teflon® PTFE fibers. It is designed for applications requiring low wear and/or low coefficient of friction against steel, itself, and other plastics.
Dielux PTFE filled acetal copolymer is an outstanding bearing and wear material for use in both wet and dry environments. Dielux is frequently used in place of traditional metal and plastic bearing materials when low friction, excellent wear properties, and good dimensional stability are required.
TECAFORM® FG Blue is a new blue colored acetal designed specifically for the food industry. TECAFORM® is resistant to hot water, and typical cleaning chemicals, and it possesses good bearing and wear properties.
TECAFORM® MT is specially formulated medical grade acetal. The material is resistant to multiple cleaning and disinfection agents, and to a number of solvents. It can be steam sterilized by medical industry’s usual methods, and will maintain good strength, stiffness, and dimensional stability.
Static dissipative acetal contains no carbon fibers or powders and is generally accepted for clean room use. With its surface resistivity of 109 to 1011 ohm/square and its excellent bearing and wear characteristics, TECAFORM SD is ideal for moving components which may experience frictional or fluid-flow static charges.