From：Join High (Xiamen) Fiber Tech Co., LTD Release time：2018-10-06
The difference between nylon 6 and nylon 66
1. The difference between the two varieties in civilian use is small, and the use is the same. This is also the reason why some countries such as the United States have long been based on nylon 66, while others in Japan, such as Japan, have long been dominated by nylon 6. However, in industrial applications, especially the tire cord nylon 66 will be more developed due to its temperature resistance.
2. From the monomer production process, nylon 66 and nylon 6 are both made of cyclohexane and ammonia, but because nylon 6 is based on sulfuric acid, sulfuric acid by-product of sulfuric acid is not good in the world powder market. The expansion of nylon 6 has a certain impact.
From the polymerization process, the polymerization of caprolactam increases the monomer extraction recovery and vacuum drying process and the polymerization time is long, and the capital investment is large; while the nylon 66 salt polymerization monomer consumes a large amount.
Although nylon 66 has its advantages, it is disadvantageous because of the long production process of the monomer and the high capital investment.
3, from the interchangeability of the equipment, nylon 66 production has its strengths, the general production of nylon 66 spinning machine can be used to produce nylon 6, while the production of nylon 6 spinning machine can not be used to produce nylon 66.
4. Development of nylon 66 and nylon 6 should be considered comprehensively from the rational use of resources. When the resources of sulfuric acid are sufficient, the application of ammonium sulfate has its market, and nylon 6 has its own strengths for priority development. It is more suitable to develop nylon 66 in places where sulfuric acid resources are relatively tight.