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Acetal Plastic - Sheet, Rod, Tube and Accessories

Acetal (Polyoxymethylene or POM) provided by Interstate Plastics is a tough, machinable thermoplastic with a high modulus of elasticity, high strength, good rigidity, dimensional stability, and resistance to moisture, chemicals and solvents.

It has desirable toughness properties, performing well at extreme temperatures and under fatigue endurance. Its low coefficient of friction (COF) and excellent wear properties, especially in wet or moist environments, make acetal one of the most widely used engineering thermoplastics on the market today.

Acetal plastic is known by brand names including Delrin®, Tecaform® and Sustarin®. Delrin®, provided by Interstate Plastics, is the leading trusted name for acetal homopolymer.

Acetal Copolymer Extruded Black Sheet

Acetal Black
Extruded Sheet

Delrin Homopolymer Acetal Black Sheet

Delrin® Black
Homopolymer Sheet

Acetal Rod - Black

Acetal Black Rod

Acetal AF Blend 13% PTFE

Acetal Sheet 13%

Static Dissipative Acetal Plastic

Acetal ESD
Static Dissipative

Acetal Extruded Natural Sheets

Acetal Natural
Extruded Sheet

Delrin Homopolymer Natural Acetal Sheet

Delrin® Natural
Homopolymer Sheet

Acetal Copolymer Natural Rod

Acetal Natural Rod

Acetal Rod AF 13% PTFE Blend

Acetal Rod 13%

Sample Packs including Acetal Plastics

Sample Packs

Acetal Overview

Interstate Plastics is proud to offer acetal - an engineering plastic used in precision applications requiring high stiffness, low friction and excellent dimensional stability.

Acetal is an ideal plastic solution due to desirable toughness properties and extreme temperature performance, making it widely used in auto, mechanical, electrical, food and beverage, medical and consumer industries.

[Acetal Spec Sheet PDF]

  • High strength and stiffness

  • Excellent dimensional stability

  • Continuous use temperature of 180°F

  • Porosity free

  • Consistent properties in wet or moist environments

  • Very low moisture absorption

  • Excellent electrical properties

  • Easy to machine to close tolerances

  • FDA & USDA compliant grades available


Acetal Applications

With high strength and stiffness, thermoplasticity, high resistance to moisture, chemicals, solvents and friction, acetal is used in many versatile applications across a wide range of industries.  

Typical applications include gears, springs, plates, bushings and housings. The Food and Drug Administration has approved Acetal for use in the food industry.

Mechanical and Industrial Applications
Acetal is the ideal candidate for product that requires inherent durability or high resistance to friction, making it widely common among mechanical and automotive industries.

Mechanical and industrial parts have become increasingly more reliable and safer due to the tough and rigid properties of acetal plastics. Acetal plastic is commonly used in the construction of valves, bearings, gears and any component that requires strength and a low coefficient of friction.

Sliding and guiding elements, housing parts, springs, chains, screws, nuts, and fan wheels are stronger and more reliable when constructed with acetal. Acetals are used to make pump parts, valve bodies, cams, clips, lugs, conveyor links and watch gears.

Acetal plastic is used to compose fuel sender units, door lock systems, articulated shells, door handles, housings, fuel systems, seat belt components, steering columns, window support buckets, and cranks and handles.

Electrical Engineering
Acetals are widely used for their stability, making them popular in electrical components. In electrical engineering industries, acetal can be machined to create insulators, bobbins, connector, and parts for electronic devices such as television and telephones. Acetal plastics are especially convenient in the electrical engineering industry because they are able to resist many kinds of chemical and solvents.

Extreme Temperature Applications
Due to acetal's rigidity, resilience, toughness and strength, it does not easily become brittle even with long-term exposure to unfavorable conditions including extremely high temperatures. Acetals absorb minimal amounts of moisture and with a high level of heat resistance, can be heated or cooled without affecting form or dimensionality. Acetals are commonly used in hot water applications up to 140°F without any hydrolysis effect.

FDA Approved Items
Available in lot-controlled FDA-compliant grades, acetal is used in items such as milk pumps, coffee spigots, filter housings and food conveyors. Due to their high level of heat resistance, acetals can be heated or cooled repeatedly without affected food taste or appearance. In addition, acetals can be disinfected and sterilized without fear of degradation, as they're highly resistant to soap solutions.

When dealing with wet environments, acetal plastics are a strong performer. Acetals are beneficial in creating water supply lines due to their durability and extremely low water absorption rates. Hard water does not harm the material, unlike many other materials, which may erode from acidic water.  Valves, valve stems pumps, impellers, faucet cartridges, shower heads and various fittings use acetal plastics. With desirable high chemical resistance, acetal is able to work with many other fluids, including waste water components.

Medical Grade Copolymer
Interstate Plastics is proud to carry Celcon® M25 Medical Grade acetal plastic.  Medical grade acetals (such as Celcon®) are used specifically for blood and tissue contact. Medical grade acetals can be sterilized time and time again without risk of degradation.

Medical industry consumers rely on high quality products such as acetal Celcon® when creating products that are used in both high-risk surgeries and routine procedures. Medical grade acetals are most commonly used in surgical instruments and size trials. These materials are backed by testing, regulatory review, and high ratings of customer satisfaction.

Consumer Items
Acetal plastics are used to make toys and product accessories including paintball accessories, airsoft guns, K'Nex® pieces, doll arms and legs, clothing zippers, audio and video cassette parts, fully automatic coffee brewers, knife handles, garden sprayers and butane lighter bodies. Acetal is the perfect plastic solution for endless commercial applications including hardware tools, mechanical pens and pencils, aerosols, locks and hinges.

• Mechanical: gears, sliding and guiding elements, housing parts, springs, chains, screws, nuts, fan wheels, pump parts, valve bodies

• Electrical Engineering: insulators, bobbins, connectors, parts for electronic devices such as televisions & telephones

• Vehicle: fuel sender unit, door lock systems, articulated shells

• Medical: insulin pens, metered dose inhalers (MDI)

• Furniture: hardware, locks, handles, hinges, curtains roles

• Packaging: aerosol cans, vehicle tanks

• Sports: paintball accessories, airsoft guns

• Clothing: zippers

• Music: picks, Irish flutes, bagpipes, practice chanters

• Dining: fully automatic coffee brewers; knife handles


Acetal versus Delrin®

Delrin® is DuPont's trade name for acetal homopolymer.

Acetal is the name generally used in the plastics industry to refer to acetal copolymer.

Copolymer acetal features no center-line porosity and has better property retention at elevated temperatures. It's available in FDA compliant grades and has better chemical resistance to hot water and high pH (basic) solutions versus Delrin®.

In comparison to acetal copolymer, homopolymer Delrin® features a higher crystallinity, providing better mechanical properties including tensile strength, creep resistance and impact strength.

Delrin® demonstrates a high strength and stiffness in addition to good dimensional stability and very low moisture absorption. Delrin® can operate in wet environments with little effect on performance and an increase in part life. Its natural grade is FDA, NSF and USDA compliant.


Physical Properties of Acetal Sheet
Property Acetal
Density (lb/in^3) 0.051 0.051
Water Absorption @24 Hours 0.2% 0.2%
Tensile Strength (psi) 9500 11000
Tensile Modulus (psi) 400,000 450,000
Elongation at Break 30% 30%
Flexural Strength (psi) 12000 13000
Flexural Modulus (psi) 400,000 450,000
Compressive Strength (psi) 15000 16000
Hardness, Rockwell M88/R120 M89/R122
Dielectric Strength (V/mil) 420 450
*Values listed are typical and are meant only as a guide to aid in design. Field testing should be performed to find the actual values for your application.


Acetal Resistance:
R = Resistant | L = Limited Resistance | N = Non-Resistant
Chemical Acetal
Acetic Acid, 5%, 10% R LR
Acetic Acid, Concentrated LR N
Acetone R R
Ammonia Solution, 10% R LR
Benzene R R
Boric Acid, Aqueous Solution N R
Butyl Acetate R R
Carbon Tetrachloride R LR
Chlorobenzene R R
Chloroform N N
Citric Acid, Aqueous Solution 10% LR N
Cupric Sulphate, 10% R N
Diesel Oil R R
Dimethyl Formamide R N
Dioxane LR R
Ethanol 96% R R
Ethyl Acetate LR R
Ethylene Chloride N N
Formaldehyde, Aqueous Solution 30% R N
Glycerine R R
Hydrochloric Acid, Aqueous Solution 2% N N
Hydrochloric Acid, Aqueous Solution 36% N R
Hydrogen Peroxide, Aqueous Solution 0.5% LR R
Hydrogen Peroxide, Aqueous Solution 30% N R
Iodine solution, Alcohol solution LR R
Isopropanol R R
Lactic Acid R N
Methanol R R
Methyl Ethyl Ketone LR R
Methylene Chloride LR LR
Milk R R
Nitric Acid, Aqueous Solution 2% N R
Nitrobenzene LR LR
Ozone N N
Petroleum R R
Propanol R R
Pyridine R LR
Silicone Oils R R
Soap Solution R R
Sodium Bisulfite 10% N R
Sodium Carbonate 10% LR R
Sodium Chloride, Nitrate, Thiosulfate 10% R R
Tartaric Acid LR LR
Vaseline R R
Water, Cold R R
Water, warm LR N
Zinc Chloride 10% N R


Acetal Sheet - Black Extruded
Acetal is a tough, stable engineering thermoplastic.
Acetal Sheet - Natural Extruded
Acetal is a tough, stable engineering thermoplastic.
Delrin® Sheet - Black
Delrin offers an excellent balance of properties that bridge the gap between metals and plastic.
Delrin® Sheet - Natural
Delrin offers an excellent balance of properties that bridge the gap between metals and plastic.
Acetal Rod - Black
Acetal is a tough, stable engineering thermoplastic.
Acetal Rod - Natural
Acetal is a tough, stable engineering thermoplastic.
Acetal Sheet ESD Natural
ESD Acetal contains no carbon fibers or powders and is for clean room use.
Acetal Sheet - 13% AF Blend
Acetal AF blend has excellent sliding/friction/wear properties.
Acetal Rod - 13% AF Blend
Acetal AF blend has excellent sliding/friction/wear properties.

Friction Resistance Material Sample Pack
Includes a 6x6" sample of Acetal, Nylon, UHMW, and a 3x3" sample of PTFE
Machinable Plastics Material Sample Pack
6x6" sample of ABS, Acetal, Acrylic, HDPE, PVC, UHMW, and 3x3" sample of PTFE.
Tensile Strength Material Sample Pack
Includes a 6x6" sample of Acetal, Nylon, and PET.
Thermoplastics Material Sample Pack
6x6" sample of ABS, Acetal, Acrylic, Nylon, PVC, UHMW, PET, and a 3x3" sample of PTFE.

Turcite Rod - A
Self-lubricating engineered thermoplastic.
Turcite Rod - X
Turcite X is a self-lubricating engineered thermoplastic.
Delrin/Acetal Shaft Collar, Various Sizes
Acetal Spur Gear, Various Sizes

Onsrud - Plastic Router Bits
Plastic cutting bits by Onsrud are an industry standard in quality.
Onsrud High Speed Steel Two Flute Fractional Drill Bit
Plastic cutting bits by Onsrud are an industry standard in quality.
Plastic Saw Blades
Saw blades that offer premium performance on hard and soft plastics.

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Phone: (888) 768-5759
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