旭化成POM 4510

旭化成POM 4510---Application: cam, gear, mechanical / electrical accessories
Remarks: fatigue resistance, general use, good wear resistance, good creep resistance, good dimensional stability, good stiffness, excellent toughness, good wear resistance, high friction and high strength

4510 physical property table
Basic performance rating unit test method
Melt flow rate (190 ℃ / 2.16kg) 9 g / 10min ASTM d1238
Saturation 0.2% ASTM D570
Test method of physical performance rating unit
Specific gravity: 1.41 g / cm ASTM D792
Molding shrinkage (flow) 1.6-2% ASTM D955
Rockwell hardness ASTM d785
(M-Scale)80
(R-Scale)115
Mechanical properties - rating units - Test methods
Tensile strength: 60.8 MPa ASTM D638
Elongation at break 60% ASTM D638
Bending modulus 2600 MPa ASTM D790
Bending strength: 88.3 MPa ASTM D790
Izod notched impact strength is 58.8 J / m, ASTM D256
Thermal performance rating unit test method
Hot deformation temperature ASTM D648
(0.45MPa,unannealed)158℃
(1.8MPa,unannealed)110℃
Melting temperature 167 ℃ ASTM D648
Linear thermal expansion coefficient of flow direction: 0.0001 cm / cm / ℃ ASTM d696
Flame retardant grade HB UL 94

较高的干燥温度虽能使树脂烘干所需的时间大为缩短，但因过高的温度易使POM制品表面氧化变黄，所以采用较温和的干燥条件。均聚POM可采用的干燥温度为80~90℃，干燥时间为2~4h。共聚POM可采用干燥温度为90~100℃，干燥时间为2~4h。在干燥上的区别是因为共聚甲醛的吸湿率低于均聚甲醛，且热稳定性要好，所以采用高温烘烤。