PA46 TW371荷兰---PA46 can be dissolved in a few solvents, but itis neither swelling nor dissolving in most solvents, so it has goodanti solvent property. PA46 has strong oil resistance and greaseresistance at higher temperature. It is an excellent material forgears and bearings in automobile industry. Its corrosion resistanceis better than PA66, and it has good oxidation resistance and issafe to use. On the one hand, sewing thread requires hightemperature resistance (needle temperature is very high), goodtoughness and uniform friction performance in processing; on theother hand, it should have good dimensional stability inapplication, and can withstand boiling water, dry heat treatment,etc. PA46 can just meet these re At the same time,because its melting point is higher than pet, PA66 and PA6, itsheat resistance is also the best. The sewing characteristics oftheir sewing thread have been studied. Under the same conditions,the sewing length of PA46 fiber is the longest, so it is a goodsewing thread material.
PA46 除可溶解于少量几种溶剂外, 在大多数溶剂中既不溶胀, 更不溶解, 具有较好的抗溶剂性。PA46在较高温度下耐油及油脂性强, 是汽车工业生产中齿轮、轴承等的ji佳材料,耐腐性能优于PA66, 且抗氧化性好, 使用安全。缝纫线一方面要求在加工时耐高温( 针温很高) , 良好的韧性和均匀的摩擦性能;另一方面在应用时应有好的尺寸稳定性, 能经受沸水、干热等处理, PA46 恰好可满足这些要求, 同时由于其熔点高于PET、PA66及PA6, 其耐热性能也是zui好的。有人研究了它们的缝纫线的缝纫特性。在相同条件下PA46纤维的缝纫长度zui长, 因而它是一种很好的缝纫线材料。
PA46在PA中耐热性较为突出, 它的热性能都比其他PA系列的产品都要优越，PA46的熔点、玻璃化温度、结晶温度及熔融焓都比另外两种PA 材料高,尤其是PA46 的熔点比PA66、PA6 分别高出33和72,这是PA46 耐热性优良的根本原因。非增强型PA46 短期所能承受的zui高温度是160, 30% 玻纤增强型PA46 的短期耐温是290, 玻纤增强PA 46在无负荷情况下长期(5 000 h) 承受170的高温后, 其抗拉强度下降50% , PA66 在170 下3 000 h后就下降了50%。PA46 在形态结构方面与PA6、PA66 差别较大, 它的机械性能因此优于后两者。
PA46 has outstanding heat resistance in PA, and its thermalperformance is superior to other PA series products. The meltingpoint, glass transition temperature, crystallization temperatureand melting enthalpy of PA46 are higher than the other two pamaterials, especially the melting point of PA46 is 33 and 72 higherthan PA66 and PA6 respectively, which is the fundamental reason forthe excellent heat resistance of PA46. The maximum short-termtemperature of unreinforced PA46 is 160, the short-term temperatureof 30% glass fiber reinforced PA46 is 290, the tensile strength ofglass fiber reinforced PA46 decreases 50% after long-term (5 000 h)170 high temperature without load, and that of PA66 decreases 50%after 3 000 h at 170. PA46 is different from PA6 and PA66 inmorphology and structure, so its mechanical properties are betterthan the latter two.
