PAR Group Acetal Sheet
PAR Group Acetal Sheet (polyoxymethylene copolymer), commonly referred to as POM-C, is a strong, rigid semi-crystalline thermoplastic that provides good sliding properties, high mechanical strength and excellent resistance to impact and wear.
Properties
- Physical Form
- Sheets
Product families
- Structural Components
- Equipment & Parts
- Housings & Enclosures
Other characteristics
- Color
- Black, Natural
- Black
- Natural
- Density
- 1390.0 - 1390.0 kg/m³
- Features
Chemical Resistant, Crystalline, Dimensional Stability, Electrically Insulating, Excellent Hydrolysis Resistance, Excellent Mechanical Strength, Good Machinability, Good Sliding Properties, Good Thermal Stability, High Impact Resistance, Low Water Absorption, Smooth Surface Finish, Wear Resistant
- Polymer Name
- Polyacetal Copolymer (POM)
- Tensile Modulus
- 2618.2 - 2618.2 MPa
- Markets
- Building & Construction
- Electrical & Electronics
- Industrial
- Standards
Complies with EC No 1953/2004 and EC No 10/2011 for plastic materials and articles intended to come into contact with food.; Natural acetal complies with the compositional requirements of FDA regulation 21 CFR 177.2470, but not for food applications involving more than 15% alcohol.; Black acetal conforms with FDA regulation 21 CFR 178.3297 'colorants for polymers'.
- Flame Rating
- UL 94 HB
- Technology
- Plastics
- Labeling Claims
- Food Contact Acceptable
- Product Families
- Plastics — Parts, Shapes & Films
- Material Features
- Chemical Resistant
- Crystalline
- Dimensional Stability
- Electrically Insulating
- Excellent Hydrolysis Resistance
- Excellent Mechanical Strength
- Good Machinability
- Good Sliding Properties
- Product Characteristic
It performs well against most dilute acids, solvents and cleaning agents and is suitable for food contact applications due to its compliance with EC and FDA regulations. The polymer is also dimensionally stable and is highly resistant to hydrolysis, making it ideal for use in demanding applications or in submerged environments.; Due to the aforementioned characteristics, along with the materials ease of machinability, acetal is a popular choice when manufacturing components that require a hard wearing, smooth finish. We frequently convert POM-C into parts such as friction bearings, gears, tool supports, housing parts, friction strips, agitators, kneading elements and seals utilizing in-house CNC machinery. Due to the material having relatively high release properties, bonding is not recommended.; In comparison to acetal homopolymer, POM-C provides enhanced resistance to chemicals and offers lower co-efficient of friction, but it is less dense than POM-H and is therefore not as hard wearing. Acetal copolymer also has a lower operating temperature and melting point than acetal homopolymer.; Natural and black acetal sheet is available to buy online at PAR Direct by clicking the link above. For bespoke components, or cut to size pieces, please contact our technical sales team by clicking the 'Enquire Now' button above. We also offer POM-C in metal detectable or blue food quality variations if required.
- Certifications and Compliance
- FDA 21 CFR 177.2420
- UL 94
- Plastics and Elastomers End Uses
- Bearings
- Food Containers
- Housings
- Properties of Acetal Sheet (POM-C)
- Temperature: -40°C up to +90°C.
- Good resistance to chemicals and solvents.
- Excellent resistance to impact and wear.
- Good electrical insulation properties.
- High mechanical strength.
- Low moisture absorption.
- Good sliding properties.
- High thermal stability.
Technical data
Table 1 of 6
5 rows| Characteristic | Value | Unit | Method |
|---|---|---|---|
| Specific Gravity | 1.39 | g/cm³ | ASTM D792 |
| Water Saturation | 0.8 | % | ASTM D570 |
| Water Equilibrium (50% RH) | 0.2 | % | ASTM D570 |
| Maximum Permissible Service Temp | 195 | °F | UL 746B |
| Lower Permissible Service Temp | -40 | °F | UL 746B |
Table 2 of 6
8 rows| Characteristic | Value | Unit | Method |
|---|---|---|---|
| Tensile Strength at Yield | 9135 | psi | ASTM D638 |
| Elongation at Yield | 15 | % | ASTM D638 |
| Elongation at Break | 30 | % | ASTM D638 |
| Notch Impact Strength | 1.5 | ft-lb/in | ASTM D256 |
| Ball Indentation / Rockwell Hardness | 120 | R-Scale | ASTM D785 |
| Hardness | 85 | Shore D | ASTM D2240 |
| Flexural Strength | 10.8 | psi | ASTM D790 |
| Modulus of Elasticity | 380000 | psi | ASTM D790 |
Table 3 of 6
5 rows| Characteristic | Value | Unit | Method |
|---|---|---|---|
| Heat Deflection Temperature: - HDT/B (66 psi) | 308 | °F | ASTM D648 |
| Heat Deflection Temperature: - HDT/A (264 psi) | 205 | °F | ASTM D648 |
| Coefficient of Linear Thermal Expansion | 3.3 | in/in/°F✴10-5 | ASTM D696 |
| Glass Transition Temperature | -85 | °F | ASTM D3418 |
| Melting Temperature | 330 | °F | ASTM D3418 |
Table 4 of 6
6 rows| Characteristic | Value | Unit | Method |
|---|---|---|---|
| Volume Resistivity | 10^13 | Ω✴cm | ASTM D257 |
| Surface Resistivity | 10^13 | Ω/SQ | — |
| Dielectric Constant at 1MHz | 3.8 | — | ASTM D150 |
| Dielectric Loss Factor at 1MHz | 0.005 | — | — |
| Dielectric Strength | 800 | V/mil | ASTM D149 |
| Tracking Resistance | 600 | Grade | IEC 60112 |
Table 5 of 6
1 row| Characteristic | Value | Method |
|---|---|---|
| Flammability | HB | UL 94 |
Table 6 of 6
3 rows| Characteristic | Value | Method |
|---|---|---|
| Bondability | no | — |
| Physiological Indifference | yes / 51 + 61 | FDA / NSF |
| UV Stabilisation | no | — |
