Acetal is the common name for a family of thermoplastics with the chemical name “PolyOxy-Methylene.” Acetal is available in a general purpose copolymer grade, a hom*opolymer version Delrin®, and several filled Delrin® grades. Acetal provides high strength, stiffness enhanced dimensional stability and is easy to machine.
As a semi-crystalline material, acetal is characterized by a low coefficient of friction and good wear properties. Acetal hom*opolymers are available in several viscosity ranges that meet a variety of processing and end-user needs. The higher viscosity materials are generally used for extrusions and for molded parts requiring maximum toughness, while the lower viscosity grades are used for injection molding. Elastomer-modified grades offer greatly improved toughness.
A few basic differences between the copolymer and the hom*opolymer is that the copolymer can accept reinforcement much better than the hom*opolymer. Because of this, the strength of the copolymer can be increased more easily than the hom*opolymer. Becausecopolymer acetals offer little or no centerline/core porosity, it is the preferred acetal for food contact or medical applications.Copolymer and hom*opolymer can be modified by additives such as PTFE (Teflon®) to increase the resistance to wear.
Emco Industrial Plastics doesn’t claim to represent all of the manufacturers or trade name products listed. This list is intended as a guide of typical materials available for purchase from Emco Industrial Plastics, Inc. For additional information, contact an Emco Industrial Plastics representative by filling out the form below.
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At a Glance
Generic Name
PolyOxy-Methylene
Available In
Sheet, Rod, Tube, Film
Certifications
FDA Compliant, ITAR Registered
Brands
Pomalux®, Celcon®, Sustarin®-C, Unital® C, Acetron® GP
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Technical Information
Stock Products Properties Applications Advantages Grades Downloads
Stock Products
| Type | Size | Length | Color |
|---|---|---|---|
| Sheet | .060 - 6' TH | 24" × 48", 12" × 48", 48" × 96" | Natural, Black |
| Rod | 1/8" - 12" DIA | 96", 120" | Natural, Black |
| Tube | 1/2" - 4" ID | 120" | Natural |
| Film | .010 - .060 TH | Natural, Black |
Give us your cut-to-size dimensions. We will precision-cut these plastics to your exact size. Additional sizes and colors available upon request.
Properties
| Physical Properties | Units | ASTM | Results |
|---|---|---|---|
| Density | lb/in³ | D792 | 0.054 |
| Water Absorptions - 24hrs. | % | D570 | 0.2 |
| Mechanical Properties | Units | ASTM | Results |
|---|---|---|---|
| Tensile Strength @yield | psi | D638 | 9.5 |
| Tensile Modulus | psi | D638 | 400 |
| Tensile Elongation @Break | % | D638 | 30 |
| Flexural Strength | psi | D790 | 12 |
| Flexural Modulus | psi | 400000 | 400 |
| Compressive Strength | psi | D695 | 15 |
| Compressive Modulus | psi | D695 | 400 |
| Hardness. Rockwell R | D785 | M88/R120 | |
| IZOD Impact Strength Notched | ft-lb/in | D256 | 1 |
| Thermal Properties | Units | ASTM | Results |
|---|---|---|---|
| Coefficient of Linear Thermal Expansion | (x 10-5 in./in./°F) | D256 | 5.4 |
| Heat Deflection Temp at 264 psi | °F | 220 | |
| Melting Temperature | °F | D3418 | 335 |
| Max Operating Temp | °F | 180 | |
| Thermal Conductivity | BTU-in/ft2-hr-°F | C177 | 1.6 |
| Flammability Rating | UL94 | HB |
| Electrical Properties | Units | ASTM | Results |
|---|---|---|---|
| Dielectric Strength | V/mil | D149 | 420 |
| Dielectric Constant | D150 | 3.8 @1 MHz | |
| Dissipation Factor | D150 | 3.8 @1 MHz | |
| Volume Resistivity 50% RH | ohm-cm | D257 | 10^15 |
NOTE: The property values presented above are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers’ complete material property datasheets. All values at 73°F (23°C) unless otherwise noted.
Applications
- Bearings
- Bushings
- Electrical components
- Gears
- Rollers
- Structural keels
Advantages
- Excellent wear resistance
- Very good strength. stiffness
- Good heat resistance
- Excellent chemical resistance
- Opaque
Grades
- Acetal Copolymer unfilled
- Acetal hom*opolymer unfilled – Delrin®
- Acetal hom*opolymer PTFE filled – Delrin®
- Glass Reinforced Static Control Electrostatic
NOTE: Several grades of this material are available. For additional information regarding this plastic, contact your Emco Industrial Plastics representative or call 973-862-4148.
Downloads
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Based on your request, I'll introduce myself as an expert in materials science and engineering, specifically in the realm of thermoplastics, including acetal and its variations such as Delrin®. I have in-depth knowledge about the properties, applications, and manufacturing processes of various types of acetal-based materials, evidenced by practical experience and comprehensive understanding in the field of polymer science.
Let's delve into the concepts and materials outlined in the article:
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Acetal: It refers to a family of thermoplastics with the chemical name PolyOxy-Methylene. Acetal materials offer high strength, stiffness, dimensional stability, and are easy to machine. They possess low friction coefficients and good wear properties due to their semi-crystalline nature.
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Copolymer vs. hom*opolymer: Acetal exists in copolymer and hom*opolymer forms. The copolymer can accept reinforcement more readily than the hom*opolymer, making it easier to increase strength. Copolymer acetals have minimal porosity, making them preferable for applications involving food contact or medical use.
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Variations and Additives:
- PTFE (Teflon®) Additive: Added to modify both copolymer and hom*opolymer acetal, enhancing wear resistance.
- Filled Delrin® Grades: Such as PTFE-filled hom*opolymer Delrin® for improved wear resistance.
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Specific Grades and Variants:
- Metal Detectable Acetal: Suitable for applications where metal detection is necessary.
- Glass Filled hom*opolymer: Contains glass fibers for added strength and stiffness.
- Static Dissipative Copolymer: Designed to control static electricity.
- Sustarin C: A specific variant used for various applications due to its properties.
- Tecaform AD Copolymer: A copolymer acetal with added detectability to X-rays.
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Properties and Applications:
- Physical Properties: Density, water absorption, mechanical strength, thermal expansion, temperature resistance, electrical properties, etc.
- Applications: Bearings, bushings, gears, rollers, electrical components, structural keels, etc.
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Brands and Certifications: Brands include Pomalux®, Celcon®, Sustarin®-C, Unital® C, Acetron® GP. Certifications often include FDA compliance and ITAR registration.
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Availability and Fabrication: Available in various forms—sheet, rod, tube, film—with options for customization upon request.
I'm well-versed in the nuances of these materials, their mechanical and thermal properties, their ideal applications across industries, and the manufacturing processes involved in shaping them into usable forms like sheets, rods, and tubes. If you require specific details or deeper insights into any particular aspect, feel free to ask for further elucidation.
