POM M270-48保理---No matter for homopolymer POM or copolymer POM, when molding thin-walled or multi c***ity products, the injection speed should be faster. This is because the injection molding of such parts requires the system to h***e a good flow performance. As mentioned above, POM melt is a shear sensitive polymer. To increase the flow performance, the injection speed can be increased. At the same time, in the above applicati***, the cooling rate of POM crystal will be very fast, and the surface defects such as wrinkles, stripes and weld lines will easily occur on the products. Therefore, it is necessary to improve the injection speed. When molding the products with larger wall thickness, a slightly slower injection speed can be used to prevent the gas wrapped in the material from effectively discharging due to the too fast injection speed. Relatively speaking, the injection speed of homopolymer POM is higher than that of copolymerized POM.
M270-48 物性表
物理性能 额定值 单位 测试方法
密度 1.40 ISO 1183
机械性能 额定值 单位 测试方法
拉伸强度 61 MPa ISO 527-1,-2
断裂应变 30 % ISO 527-1,-2
拉伸弹性模数 2600 MPa ISO 527-1,-2
弯曲强度 85 MPa ISO 178
弯曲模量 2500 MPa ISO 178
简支梁缺口冲击强度 5.3 KJ/m ISO 179/1eA
电气性能 额定值 单位 测试方法
体积电阻率 1×10 Ω.cm IEC 60093
表面电阻率 1×10 Ω IEC 60093
热性能 额定值 单位 测试方法
热变形温度 95 ℃ ISO 75-1,-2
线膨胀系数 ISO 11359-2
(流动方向) 11
(垂直方向) 11
阻燃性 HB
