Acetron® H POM-H
Acetron® POM-H / Ertacetal® H is a homopolymer acetal grade that offers exceptional mechanical strength, stiffness, and hardness, making it the ideal choice for a wide range of demanding applications. Its superior creep resistance and low thermal expansion rate make it stand out from copolymer acetal grades, making it the go-to material for small diameter, thin-walled bushings, bearings, gears, electrical components, medical and diagnostic equipment, valves, and fluid handling components.Features:Superior mechanical strength, stiffness, and hardnessExceptional creep resistanceLow thermal expansion rateHigh wear resistanceBenefits:Durable and long-lasting performanceEasy installation and removal with minimal distortionHigh resistance to chemical wearHigh impact strength, even at low temperaturesExcellent dimensional stabilityApplications:Small diameter, thin-walled bushings and bearingsGearsElectrical componentsMedical and diagnostic equipmentValvesFluid handling components
Properties
- Physical Form
- Plates, Rods
- Plates
- Rods
Product families
- Equipment & Parts
- Laboratory & Diagnostics
- Medical Devices & Assemblies
- Tubing & Fluids Handling
Other characteristics
- Brand
- Acetron® POM-C, POM-H
- Density
- 1,430.0 kg/m³
- Features
Creep Resistant, Excellent Mechanical Strength, Excellent Stiffness, Good Machinability, High Hardness, High Strength, Improved Wear, Low Moisture Absorption, Low Thermal Expansion, Wear Resistant
- Polymer Name
- Polyacetal Homopolymer (POM)
- Tensile Modulus
- 3,700.0 MPa
- Markets
- Healthcare & Pharma
- Industrial
- Technology
- Plastics
- Product Families
- Plastics — Parts, Shapes & Films
- Overview
Low moisture absorption; High strength, stiffness; Easy to machine; No centerline porosity in Acetron® GP; Many formulation options: Copolymer, Homopolymer, PTFE filled, and Internally lubricated/enhanced wear grade; Acetal provides 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 -- especially in wet environments.; Because acetal absorbs minimal amounts of moisture, its physical properties remain constant in a variety of environments. Low moisture absorption results in excellent dimensional stability for close-tolerance machined parts. In high moisture or submerged applications, acetal bearings outperform nylon 4 to 1. Acetal is ideally suited for close tolerance mechanical parts and electrical insulators which require strength and stiffness. It also offers resistance to a wide range of chemicals including many solvents.; Mitsubishi Chemical Advanced Materials offers both homopolymer and copolymer grades of acetal including enhanced bearing grade materials. Acetron® GP acetal is porosity-free and offered as our standard general purpose grade. For slightly higher mechanical properties, we offer a broad size range of the homopolymer acetal (Delrin®) products. For improved frictional properties PTFE-enhanced Delrin AF products are available.
- Material Features
- Creep Resistant
- Excellent Mechanical Strength
- Excellent Stiffness
- Good Machinability
- High Hardness
- High Strength
- Improved Wear
- Low Moisture Absorption
- HIGHLIGHTS
Acetron POM-H Delrin is a homopolymer acetal, manufactured and stocked in rod and plate. It offers slightly higher mechanical properties than Acetron® GP Acetal, but may contain a low-density center, especially in larger cross-sections. Copolymer acetal also offers better chemical resistance than homopolymer acetal. Delrin is ideal for small diameter, thin-walled bushings that benefit from the additional strength and rigidity of homopolymer acetal.
- Plastics and Elastomers End Uses
- Bearings
- Bushings
- Electrical Parts
- Fluid Handling
- Gears
- Labware
- Medical Devices
- Medical/Healthcare Applications
Technical data
Table 1 of 4
12 rows| Characteristic | Value | Unit | Method |
|---|---|---|---|
| Tensile Strength | 78 | MPa | ISO 527-1/-2 ⁷ |
| Tensile Strain at Break (Elongation) | 25 | % | ISO 527-1/-2 ⁷ |
| Tensile Modulus of Elasticity | 3700 | MPa | ISO 527-1/-2 ⁹ |
| Shear Strength | 62 | MPa | ASTM D732 |
| Compressive Stress (at 1% nominal strain) | 29 | MPa | ISO 604 ¹⁰ |
| Compressive Stress (at 2% nominal strain) | 49 | MPa | ISO 604 ¹⁰ |
| Compressive Stress (at 5% nominal strain) | 85 | MPa | ISO 604 ¹⁰ |
| Charpy Impact Strength (Notched) | 10 | kJ/m² | ISO 179-1/1eA |
| Flexural Strength | 106 | MPa | ISO 178 ¹² |
| Flexural Modulus of Elasticity | 3450 | MPa | ISO 178 ¹² |
| Hardness ¹⁴ | 88 | — | ISO 2039-2, Rockwell M |
| Hardness ¹⁴ | 81 | Shore D | ISO 868 |
Table 2 of 4
7 rows| Characteristic | Value | Unit | Method |
|---|---|---|---|
| Melting Temperature (DSC, 10°C / min) | 180 | °C | ISO 11357-1/-3 |
| Coefficient of Linear Thermal Expansion (23 to 100°C) | 95 | μm/(m.K) | — |
| Coefficient of Linear Thermal Expansion (23 to 60°C) | 110 | μm/(m.K) | — |
| Heat Deflection Temperature | 110 | °C | ISO 75-1/-2 (Method A: 1.8 MPa (264 PSI)) |
| Continuous Allowable Service Temperature in Air (20.0 hrs) ³ | 90 | °C | — |
| Minimum Service Temperature ⁴ | -50 | °C | — |
| Flammability (Oxygen Index) | 15 | % | ISO 4589-1/-2 |
Table 3 of 4
3 rows| Characteristic | Value | Unit | Method |
|---|---|---|---|
| Electric Strength | 20 | kV/mm | IEC 60243-1 ¹⁵ |
| Volume Resistivity | 10E13 | Ohm.cm | IEC 62631-3-1 |
| Surface Resistivity | 10E12 | Ohm/sq. | ANSI/ESD STM 11.11 |
Table 4 of 4
2 rows| Characteristic | Value | Unit | Method |
|---|---|---|---|
| Water Absorption (After 24h immersion in water of 23°C) | 0.21 | % | ISO 62 ¹⁶ |
| Dynamic Coefficient of Friction | 0.3 - 0.45 | — | ISO 7148-2 ¹⁸ |
