POM 520MP杜邦

POM 520MP杜邦---20% Teflon® Lubricated Medium Viscosity Acetal Homopolymer with Low Wear and Low Friction

Physical performance rating unit system test method
Density: 1.54 g / cm? ISO 1183
Shrinkage: ISO 294-4
Vertical flow direction 1.5% ISO 294-4
Flow direction 1.9% ISO 294-4
Mechanical properties rating unit system test method
Tensile modulus 2800 MPa ISO 527-2
Tensile stress (yield) 53.0 MPa ISO 527-2
Tensile strain (yield) 13% ISO 527-2
Nominal tensile breaking strain 15% ISO 527-2
Tensile creep modulus ISO 899-1
1 hr1500MPaISO 899-1
1000 hr800MPaISO 899-1
Bending modulus 2700 MPa ISO 178
Impact performance rating unit system test method
Notched impact strength of simply supported beams ISO 179 / 1ea
-30°C4.0kJ/m²ISO 179/1eA
23°C4.0kJ/m²ISO 179/1eA
Notchless impact strength of simply supported beam (23 ° C) 70 kJ / M? ISO 179 / 1eu
Notched impact strength (23 ° C) 4.0 kJ / M? ISO 180 / 1A
Thermal performance rating unit test method
Hot deformation temperature
0.45 MPa, UN annealed at 160 ° C ISO 75-2 / b
1.8 MPa, UN annealed at 94.0 ° C ISO 75-2 / A
Melting temperature 1 178 ° C ISO 11357-3
Linear coefficient of thermal expansion ISO 11359-2
Flow 1.0e-4 cm / cm / ° C ISO 11359-2
Transverse 9.7e-5 cm / cm / ° C ISO 11359-2

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共聚甲醛密度、结晶度、熔点、强度都较低，力学性能较均聚差，热变形温度低，但热稳定性好，有较高的连续使用温度，不易分解，加工温度范围宽（约50℃），对酸碱稳定性较好，耐候性能较好。