INTRODUCTION OF POM Polyoxymethylene (POM), also known as acetal , polyacetal, and polyformaldehyde, is an engineering thermoplastic used in precision parts that require high stiffness, low friction and excellent dimensional stability. PROPERTIES 1.POM is characterized by its high strength, hardness and rigidity to -40 °C POM is intrinsically opaque white, due to its high crystalline composition, but it is available in all colors. 2.POM homopolymer is a semi-crystalline polymer (75-85% crystalline) with a melting point of 175° Celsius 3.POM copolymer has a slightly lower melting point of 162 – 173° Celsius. Specification
Test Item | Test condition | Test method(ASTM) | Units | Test Data |
Water absorption | 23°C60%RH | ASTM D-570 | % | 022 |
Melt flow rate | - | ASTM D-1237 | g/10min | 9 |
Mold shrinkage | Transverse | - | % | 20 |
Specific Gravity | - | ASTM D-792 | g/cm3 | 1.41 |
Tensile strength | 1.6mm | ASTM D-1822 | KJ/m2 | 98 |
Elongation | 23°C | ASTM D-638 | % | 50 |
Tensile strength | 23°C | ASTM D-638 | MPa | 62.3 |
Flexural strength | 23°C | ASTM D-790 | MPa | 91.2 |
Rockwell hardness | - | ASTM D-785 | M scale | 80 |
Notch impact strength(Izod) | 3.2mm | ASTM D-256 | J/M | 54 |
Flexural modulus | 23°C | ASTM D-790 | GPa | 2.62 |
Tearing strength | 2mm | ASTM D-732 | MPa | 54.9 |
Melting point | 10°C/min | ASTM D-3418 | °C | 165 |
Flammability | - | UL94 | - | HB |
APPLICATION 1.Electrical Engineering: insulators, bobbins, connectors, parts for electronic devices such as televisions, telephones, etc. 2.Vehicle: Fuel sender unit, Light stock (including shifter for light, turn signal), power windows, door lock systems, articulated shells. 3.Model: Thin, later claimed Modellbahnen parts, such as bogies and handle bars. POM breaks under load slightly less than ABS, but in bright translucent colors, and not paintable. 4.Furniture: hardware, locks, handles, hinges, or even curtains roles. 5.Construction: Structural Glass - pod holder for point 6.Sports: Paintball accessories. It is often used for machined parts of paintball markers that do not require the strength of aluminum, such as handles and reciprocating bolts. POM is also used in airsoft guns, in order to reduce the noise of the piston. 7.Clothing: zippers Packaging & Shipping 25kg pp bag,16-18MT/20'FCL Fast Delivery