POM-H Sheets POM-H Sheets POM-H Sheets
Polyoxymethylene (POM-H) Sheets
Our Polyoxymethylene (POM-H) sheets are crafted from a semi-crystalline thermoplastic plastic renowned for its exceptional strength, rigidity, and hardness—qualities that rival polyamide with added advantages. Unlike polyamide, POM-H resists moisture absorption, ensuring stability in humid environments and maintaining consistent linear dimensions.
Key Features:
- Outstanding Slip and Abrasion Resistance: POM-H sheets exhibit excellent slip, abrasion resistance, and remarkable release properties.
- Mechanical Superiority: While sharing similarities with polyacetal POM-C, POM-H surpasses it in mechanical and thermal characteristics, offering higher mechanical properties, superior wear resistance, and enhanced suitability for tribological systems.
- Machinability: POM-H sheets are highly machinable, showcasing a good degree of toughness, even in low-temperature conditions.
- Excellent Water Performance: Demonstrating remarkable performance in water, POM-H sheets should avoid prolonged contact with hot water exceeding +60°C.
Main Characteristics:
- Mechanical Strength and Hardness: POM-H sheets exhibit impressive mechanical strength and hardness.
- Elasticity and Durability: Exceptional elasticity and durability, including elastic memory.
- High Impact Strength: Maintains high impact strength, even in low temperatures.
- Dimensional Stability: Shows very good dimensional stability during processing.
- Sliding Properties and Wear Resistance: Possesses good sliding properties and wear resistance.
- Excellent Workability: Demonstrates excellent workability, making it well-suited for various applications.
- Good Electrical Properties: Exhibits good electrical properties and serves as a reliable dielectric.
- Self-Lubricating: Functions as a self-lubricating material, reducing friction.
- Physiologically Inert: Suitable for the food industry, as it is physiologically inert.
- No Water Absorption: Does not absorb water, ensuring stability in diverse environments.
- UV Resistance: Shows good resistance to UV rays.
Applications:
Ideal for applications such as screw drives, rollers, holders, boxes, bearings, conveyor chains, cams, gears with low torque, gear wheels, conveyor rollers, and precision parts requiring superior dimensional stability. POM-H finds widespread use in industrial equipment, agricultural and construction machinery, owing to its unique balance of physical and mechanical properties, including mechanical strength, anti-friction and wear resistance, corrosion resistance, and chemical and atmospheric resistance.
Mechanical Properties
| MECHANICAL PROPERTIES | VALUE | UNIT | PARAMETER | NORM |
|---|---|---|---|---|
| Modulus of elasticity (tensile test) |
3400 | MPa | 1mm/min | DIN EN ISO 527-2 |
| Tensile strength | 79 | MPa | 50mm/min | DIN EN ISO 527-2 |
| Tensile strength at yield | 79 | MPa | 50mm/min | DIN EN ISO 527-2 |
| Elongation at yield | 37 | % | 50mm/min | DIN EN ISO 527-2 |
| Elongation at break | 45 | % | 50mm/min | DIN EN ISO 527-2 |
| Flexural strength | 106 | MPa | 2mm/min, 10 N | DIN EN ISO 178 |
| Modulus of elasticity (flexural test) |
3600 | MPa | 2mm/min, 10 N | DIN EN ISO 178 |
| Compression strength | 19/33/69 | MPa | 1% / 2% / 5% | EN ISO 604 |
| Compression modulus | 2700 | MPa | 5mm/min, 10 N | EN ISO 604 |
| Impact strength (Charpy) | n.b. | kJ/m2 | max. 7,5J | DIN EN ISO 179-1eU |
| Notched impact strength (Charpy) | 15 | kJ/m2 | max. 7,5J | DIN EN ISO 179-1eA |
| Ball indentation hardness | 185 | MPa | ISO 2039-1 |
Thermal Properties
| THERMAL PROPERTIES | VALUE | UNIT | PARAMETER | NORM |
|---|---|---|---|---|
| Glass transition temperature | -60 | C | DIN EN ISO 11357 | |
| Melting temperature | 182 | C | DIN EN ISO 11357 | |
| Service temperature | 150 | C | short term | NN |
| Service temperature | 110 | C | long term | NN |
| Thermal expansion (CLTE) | 12 | 10-5*1/K | 23-60°C, long. | DIN EN ISO 11359-1;2 |
| Thermal expansion (CLTE) | 13 | 10-5*1/K | 23-100°C, long. | DIN EN ISO 11359-1;2 |
| Thermal conductivity | 0.43 | W/(k*m) | ISO 22007-4:2008 | |
| Specific heat | 1.3 | J/(g*K) | ISO 22007-4:2008 |
Electrical Properties
| ELECTRICAL PROPERTIES | VALUE | UNIT | PARAMETER | NORM |
|---|---|---|---|---|
| surface resistivity | 1014 | O | DIN IEC 60093 |
Other Properties
| OTHER PROPERTIES | VALUE | UNIT | PARAMETER | NORM |
|---|---|---|---|---|
| Water absorption | 0.1 | % | 24h / 96h (23°C) | DIN EN ISO 62 |
| Resistance to hot water/ bases | – | – | – | |
| Resistance to weathering | – | – | NN | |
| Flammability (UL94) | HB | – | corresponding to | DIN IEC 60695-11-10; |
