POM 100AF杜邦

POM 100AF杜邦----产品说明：20% Teflon® Fiber Filled High Viscosity Acetal Homopolymer with Low Wear and Low Friction

Physical performance rating unit system test method
Density: 1.54 g / cm? ISO 1183
Melt flow rate (melt flow rate) (190 ° C / 2.16 kg) 1.3 g / 10 min ISO 1133
Shrinkage: ISO 294-4
Vertical flow direction 1.5% ISO 294-4
Flow direction: 2.1% ISO 294-4
Mechanical properties rating unit system test method
Tensile modulus 2700 MPa ISO 527-2
Tensile stress (fracture) 53.0 MPa ISO 527-2
Tensile strain (fracture) 15% ISO 527-2
Bending modulus 2500 MPa ISO 178
Impact performance rating unit system test method
Notched impact strength of simply supported beam (23 ° C) 5.0 kJ / M? ISO 179 / 1ea
Notchless impact strength of simply supported beam (23 ° C) 70 kJ / M? ISO 179 / 1eu
Notched impact strength of cantilever beam (23 ° C) 5.0 kJ / M? ISO 180 / 1A
Thermal performance rating unit test method
Hot deformation temperature (1.8 MPa, UN annealed) 87.0 ° C ISO 75-2 / A
Melting temperature 1 178 ° C ISO 11357-3
Linear coefficient of thermal expansion ISO 11359-2
Flow 1.1e-4 cm / cm / ° C ISO 11359-2
Transverse 1.1e-4 cm / cm / ° C ISO 11359-2

POM塑胶原料是分子主链中含有-CH2-O-链节的线性高分子化合物，为乳白色不透明结晶性线性热塑性树脂。POM是一种没有侧基、高密度、高结晶的线性聚合物，具有优异的综合性能。它是继尼龙之后发展的优良树脂品种，分子结构规整和结晶性使其物理机械性能十分优异，有“金属塑料”之称。POM按分子链中化学结构的不同可分为均聚甲醛和共聚甲醛两种，均聚甲醛一般是由无水聚甲醛聚合而得，共聚甲醛是由三聚甲醛与少量二氧戊环的共聚产物。正是由于结构上的不同，导致均聚和共聚甲醛在各项性能下存在差异。两者主要区别是：均聚甲醛密度、结晶度较高，熔点与HDT较共聚甲醛高10℃，强度、耐蠕变性能和耐摩擦性能更优越，但热稳定性差，加工温度范围窄约10℃，对酸硷的稳定性较低。