Acetal plastic, also known by the brand name Delrin®, is a mechanical thermoplastic used for precision close-tolerance industrial and mechanical components, featuring high strength and stiffness coupled with enhanced dimensional stability and ease of machining. As a semi-crystalline material, acetal is also characterized by a low coefficient of friction and good wear properties even in extremely cold environments.
Acetal comes in a variety of grades to enhance specific features including static dissipative and PTFE blend grades. General purpose acetal is a copolymer plastic, while Delrin® has a homopolymer makeup.
Copolymer acetal plastic has no center-line porosity and performs better than standard Delrin® at elevated temperatures. It’s available in FDA compliant grades and features slightly increased resistance to chemicals, hot water, and high pH solutions versus Delrin® homopolymer acetal.
Homopolymer Delrin® acetal plastic features a higher crystallinity, providing better mechanical properties including tensile strength, creep resistance and impact strength. Delrin® demonstrates 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 may see increased part life. Its natural grade is FDA, NSF and USDA compliant.
| Physical Properties of Acetal & Delrin® Sheet * | ||
| Property | Acetal Copolymer |
Delrin Homopolymer |
|---|---|---|
| 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 |
| *The 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. | ||
Delrin® & Acetal Plastic Features
- Consistent properties in wet or moist environments
- Easy to machine to close tolerances
- High strength and stiffness
- Excellent dimensional stability
- High crystallinity with centerline porosity
- High tensile- and impact strength
- Excellent creep resistance
- Very low moisture absorption
- Excellent electrical properties
- FDA and USDA compliant grades available
Give us a call today for help finding the Delrin®/acetal plastic grade best suited for your application!
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Delrin® – High Strength Black Homopolymer Acetal Sheet
$449.09 – $1,593.14In stock
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