-美国杜邦 PA66--------------------4
杜邦Zytel系列PA66
◆[耐热性]PA66在塑胶材料中有较高的熔点，在较高温度也能保持较强的强度和刚度，熔点252℃，连续耐热80-120℃。
◆[阻燃性]PA66树脂本身不具有阻燃性，需要添加防火剂使其达到阻燃效果。
◆[机械性能]PA66有优良的力学性能，机械强度很高，韧性超好，还具有自润性、耐摩擦性好等特性。
◆[耐化学品性]PA66对许多溶剂具有抗溶性，能耐酸、碱、大多数无机盐水溶液、卤代烷、烃类、酯类、酮类等腐蚀，但易容于苯酚、甲酸等极性溶剂。
◆[尺寸稳定性]PA66应吸水性较大，因而尺寸稳定性较差，饱和水可达到3%以上。在一定程度影响制件的尺寸稳定性，在产品设计时，一定要考虑吸湿性对几何稳定性的影响。
◆[加工性能]PA66的粘性较低，因此流动性很好。这个性质可以用来加工很薄的元件。它的粘度对温度变化很敏感。PA66的收缩率在1%~2%之间，加入玻璃纤维后可以将收缩率降低到0.2%~1% 。收缩率在流动方向和与流动方向相垂直方向上的相差是较大的。
PA66的主要应用领域
高温电气插座零件、电气零件、齿轮、轴承、滚子、弹簧支架、滑轮、螺栓、叶轮、风扇叶片、螺旋桨、高压封口垫片、阀座、输油管、储油容器、绳索、扎带、传动皮带、砂轮粘合剂、电池箱、绝缘电气零件、线芯、抽丝等。
- dupont PA66-————4 Dupont Zytel Series PA66. [ heat resistance ] PA66 has a high melting point in plastic materials and maintains a high strength and stiffness at higher temperatures, with a melting point of 252 ° C and continuous heat resistance of 80-120 ° C. [ flame retardant ] PA66 resin itself does not have flame retardant, so it is necessary to add fire retardant to make it reach flame retardant effect. Mechanical properties PA66 has excellent mechanical properties, high mechanical strength, excellent toughness, self-lubrication, good friction resistance and other characteristics. [ chemical resistance ] PA66 is resistant to many solvents, including acid, alkali, most inorganic salt solutions, haloalkanes, hydrocarbons, esters, ketones, etc. , but easy to phenol, formic acid and other polar solvents. [ dimensional stability ] PA66 should have high water absorbency, so its dimensional stability is poor. The saturated water can reach more than 3% . In a certain extent affect the dimensional stability of parts, in product design, must consider the hygroscopicity of geometric stability. The viscosity of PA66 is low, so it has good fluidity. This property can be used to machine very thin components. Its viscosity is sensitive to changes in temperature. The shrinkage rate of PA66 was between 1% and 2% , which could be reduced to 0.2% and 1% by adding glass fiber. The difference of shrinkage rate between the flow direction and the vertical direction is large. The main application fields of PA66 are high-temperature electrical socket parts, electrical parts, gears, bearings, rollers, spring supports, pulleys, bolts, impellers, fan blades, propellers, high-pressure sealing gaskets, valve seats, oil pipelines, oil storage containers, ropes, cable ties, transmission belts, grinding wheel adhesives, battery boxes, insulated electrical parts, wire cores, wire drawing, etc. .