Pom C Acetal Copolymer
The POM C Acetal Copolymer or Polyacetal Copolymer as it is popularly known can be classified under the special engineering plastic which is characterized by great mechanical strength general rigidity and wear resistence. There is low moisture absorption behavior of the material and hence dimensional stability of the finished part is superior which is ideal for manufacturing of precision components. POM C is employed for instance in applications where low friction and high stiffness are critical like in the case of gears, bearings and bushings. This acetyl polymer is also resistant to a multitude of chemicals, and possesses good properties for sliding and wear.
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Thermoplastic
Acetal Copolymer (POM-C)
Suitable for conventional plastic fabrication techniques such as machining and CNC.
Kingsun's senior machining engineer
Pom C Acetal Copolymer Properties
Mechanical Properties
- Tensile Strength at Break: 70.0 MPa (10,200 psi)
- Elongation at Break: ≥ 15%
- Modulus of Elasticity: 3.10 GPa (450 ksi)
- Flexural Strength: 80.0 MPa (11,600 psi)
- Flexural Modulus: 2.60 GPa (377 ksi)
- Compressive Strength: 110 MPa (16,000 psi)
- Izod Impact, Notched: 7.20 kJ/m² (3.43 ft-lb/in²)
- Hardness, Shore D: 83
Physical Properties
- Density: 1.41 g/cc
- Water Absorption: 0.20% at 23°C after 24h.
- Moisture Absorption on Equilibrium: 0.10%
Thermal Properties
- Melting Temperature: 170°C (338°F)
- Max. Operating Temperature in Air: 90°C (194°F) ◈ Continuous, 140°C (284°F) Intermittent
- Deflection Temperature at a stress level of 0.46 MPa: 160°C (320°F)
- Deflection Temperature with 1.8 MPa stress applied: 110°C (230°F)
- Thermal Conductivity: 0.310 W/m-K
Electrical Properties
- Volume Resistivity: 1.00e+15 ohm-cm
- Surface Resistance: 1.00e+13 ohm
- Dielectric Constant: 3.8 at 1 MHz
- Dielectric Strength: 16.5 kV/mm
Post Treatments
POM C Acetal Copolymer is also most of the time used in its original form owing to its amazing characteristics and retained capability to be individually machined and polished where necessary.
Common Applications
- Components’ details including precision mechanical parts like gears, bearings and bushings
- Electrical isolators
- Fitting into food and medical applications because of its imperviousness to moisture and safety for food contact.
Recommended Reading
Frequently Asked Questions (FAQs)
Q: What is POM-C acetal copolymer? What makes this acetal POM-C copolymer different from the other POM materials?
A: The international standard for polyoxymethylene copolymer is the POM-C acetal copolymer which can be referred to as a copolymer materials engineering plastic. It is chemically different from the POM-H (Homopolymer Acetal) providing better thermal degradation and resistance to heat. POM-C is usually chosen due to its better and more convenient erection within the dimensional tolerance range as well as processing than the homopolymer acetal grades.
Q: What materials POM-C possesses the significant properties?
A: The POM-C acetal copolymer has several advantages including the high strength, rigidity, and hardness. In addition, it is characterized by optimal wear and low coefficient of friction, stable dimensions, and low moisture absorption. Such characteristics make it possible to use the polyacetal material in a wide range of engineering applications across multiple industries.
Q: Where is POM-C sold?
A: The range of POM-C application areas is very extensive, including automotive, consumer electronics, industrial machines, and medical devices. It is combined mechanical properties in addition to chemical resistance and simple machining that makes it possible for the application of the material to be used in gears, bearings, connectors and numerous intricate components in the industries.
Q: What are the properties of POM-C that make it highly resistant to chemical attack, including low moisture absorption?
A: POM-C acetal copolymer comprises good chemical resistance in many mix of environments such as hydrocarbons, alcohols and weak acids. Its strength against organic solvents and fuels makes it viable in automobile and industrial applications where toughness is required. However, at the same time, this material is limited in some ways, strong acids and oxidizers will impact its performance, and that is why this factor should be carefully evaluated for every specific case.
Q: Give the thermal properties of POM-C plastic.
A: POM-C has good thermal properties wherein its melting point is approximately 165 °C (329°F) and it has continuous possession temperature up to 100 °C (212 °). It can retain its mechanical performance within very broad temperature variants and has little motion with increase in temperature which enhances its dimensional stability. Such properties make it suitable where mild hot conditions are to be experienced.
Q: How does POM-C perform as compared to metal in terms of performance, benefits among others?
A: Yes, metals have quite good strength and could withstand elevated temperatures, but POM-C has advantages in selected cases due to its toughness and low moisture absorption. These are reduction of structural mass, improved resistance to corrosion, self lubrication of surfaces, and improved processing conditions. POM-C also contains excellent sliding properties combined with excellent wear properties. Thus, this material could be used instead of metal in a large number of moving parts and bearings.
Q: Is POM-C suitable for food contact applications?
A: Yes, certain grades of the acetal POM-C copolymer have been found eligible for food contact applications. These materials of POM-C meet the food contact regulatory requirements of the FDA and the EU. They have good chemical resistance, low porosity, and excellent wear resistance, which suits components of many food processing equipment and kitchenware made from POM plastic.
Q: What are some common trade names for the acetal POM-C copolymer produced by different manufacturers?
A: POM-C is one of the several acetal copolymers known by the various trade names produced by different manufacturers of polyacetal. Some good examples are Celcon® from Celanese, Ertacetal® C from Mitsubishi Chemical Advanced Materials, Acetron® GP from Quadrant Engineering Plastic Products, and Tecaform® AH from Ensinger. Little difference exists between these products regarding properties and processing parameters.
Q: How is POM-C in terms of machinability?
A: POM-C has a good possess machinability, and complex parts can be produced with precision crafting. It is amenable to the conventional machining processes of turning, milling, and drilling, especially in the form of rod. Its low static and dynamic friction and dimensional stability provide the material with effective machining capabilities, hence perfect for the manufacture of complicated parts with accurate tolerances.