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Plastic vehicle-mounted gears:
1.The Introduction of POM Material:
POM is a semi-crystaline thermalplastic with high mechanical strength and rigidity. It has good sliding characteristics and wear resistance.as well as low moisture absorption.The good dimentional stability and good fatigue strength as well as excellent machining ability make POM a highly versatile engineering material,even for complex components.
2.The Advantages of POM:
1.High strength,rigidity and hardness.
2.Good impact strength,even at low temperatures.
3.low moisture absorption(at saturation 0.8%).
4.Good creep resistance.
5.High dimensional stability.
6.Resistant to hydrolysis.
7.Good dimensional accuracy.
8.Wear resistant.
3.POM Property parameter:
| Technical Data | Test condition | Test method | Test data | Unit | |
| Physical properties | Density | − − | ISO 1183 | 1.39 | g/cm3 |
| water absorption | 24H dipping(23°C) | ISO 62 | <0.3 | % | |
| Mechanical properties | Tensile strength at yield | 23°C | ISO 527-2 | 63 | M PA |
| Tensile strength at break | 23°C | ISO 527-2 | − − | M PA | |
| Elongation at break | 23°C | ISO 527-2 | 31 | % | |
| Rockwell hardness R | − − | ISO 2039-2 | − − | ||
| Durometer Hardness D | − − | DIN 53505 | 83 | ||
| Charpy impact strenght | 23°C | ISO 197 | N.B. | KJ/m2 | |
| Friction coefficient | 23°C | DIN 53375 | 0.35 | ||
4.Applactions of POM:
The transfer screws,star wheel,gear,chain,radiator pipe valve.Cover of the spanner electronic shear,handle.Accessories of TV sets,recorder,wireless,computer faucet windon frame,Water tank,pipe tie-in.
POM Characteristics
Advantages
1,high surface hardness
2,good wear resistance
3,nice self-lubricating properties
4,good dimensional stability
5,low water absorption
6,oil resistant
7,work under the temperature of -40-100°C
Disadvantages
1,poor acid resistance
2,not resistant to strong alkali and UV
3,poor notch impact resistace
POM Applications
1,Industrial area: used to make gears ,bearings
2,Automobile industry
3,Electronic and electrical appliances
4,sports equipmen


















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