1966年，在联邦德国赫斯化学公司大规模生产聚酰胺12。1972年，又实现了芳香族聚酰胺的工业生产。70年代以后，聚酰胺的改性引起人们的极大兴趣，特别是石油化工的发展，聚酰胺的原料路线转向石油，成本逐年下降，产量逐年增长，使聚酰胺发展成为一类品种多、能够适应于多种用途的高分子材料。

PA6的化学物理特性和PA66很相似，然而，它的熔点较低，而且工艺温度范围很宽。

PA66广泛用于制造机械、汽车、化学与电气装置的零件，如齿轮、滚子、滑轮、辊轴、泵体中叶轮、风扇叶片、高压密封围、阀座、垫片、衬套、各种把手、支撑架、电线包内层等。

另一种改性的方法是共聚，共聚尼龙是良好的包覆材料和衬垫密封材料；聚酰胺与聚烯烃嵌段接枝共聚，可大幅度提高冲击强度和尺寸稳定性，降低吸湿性，甚至可制成易加工、低成本的塑料制品。这种解决聚酰胺缺陷的有效途径，是近年来发展改性品种的方向之一。

PA66德国巴斯夫 A3LHP BK20465 低温韧性，紧固件

PA66德国巴斯夫 A3WR01 SW805 高流动性，热稳定性

PA66德国巴斯夫 C3U 电器部件，阻燃，耐冲击

PA66德国巴斯夫 C3U BK23079 抗撞击性，电器导线绝缘材料

PA66德国巴斯夫 1403-2 NF3001 玻纤增强13%，热稳定剂

PA66德国巴斯夫 A3EG3 BK00564 玻璃织物增强材料15%，高刚性，设备/机械部件

In 1966, polyamide 12 was produced on a large scale at Hess Chemical Company in Federal Germany. In 1972, industrial production of aromatic polyamides was achieved. After the 1970s, the modification of polyamide aroused great interest, especially in the development of petrochemical industry. The raw material route of polyamide shifted to petroleum, with costs decreasing year by year and production increasing year by year. This led to the development of polyamide as a type of high molecular material with a wide variety of varieties and adaptability for various purposes.

The chemical and physical properties of PA6 are very similar to PA66, however, its melting point is low and the process temperature range is wide.

PA66 is widely used in the manufacturing of parts for mechanical, automotive, chemical, and electrical devices, such as gears, rollers, pulleys, roller shafts, impellers in pump bodies, fan blades, high-pressure sealing enclosures, valve seats, gaskets, bushings, various handles, support frames, and inner layers of wire bundles.

Another modification method is copolymerization, where copolymerized nylon is a good coating material and gasket sealing material; Polyamide and polyolefin block grafting copolymerization can significantly improve impact strength and dimensional stability, reduce moisture absorption, and even make easily processed and low-cost plastic products. This effective way to solve polyamide defects is one of the directions for developing modified varieties in recent years.

PA66 BASF A3LHP BK20465 Low temperature toughness, fastener

PA66 BASF Germany A3WR01 SW805 High fluidity, thermal stability

PA66 BASF C3U electrical components from Germany, flame retardant, impact resistant

PA66 BASF C3U BK23079 Impact resistance, electrical wire insulation material

PA66 BASF 1403-2 NF3001 glass fiber reinforced 13%, heat stabilizer

PA66 German BASF A3EG3 BK00564 glass fabric reinforced material 15%, high rigidity, equipment/mechanical components