PTFE, A New Wear-resistant Additive, Has Better Performance

- Oct 27, 2020-

Wear resistant, additive, PTFE

At present, molybdenum disulfide is mostly added to the modified wear-resistant engineering plastics in China. However, the wear-resistant mechanism depends on its own hardness and fills the products, which can only reduce the friction coefficient and can not improve the wear of the matrix materials, and only black or gray products can be produced. The use of PTFE (polytetrafluoroethylene) powder can solve this problem.

The difference between micro powder and ordinary PTFE is that it has a lower molar mass, which is only about 1 / 100 of ordinary PTFE. At present, there are 3M from the raw materials to the final products of the micronized powder, and its PTFE micropowder mainly has two models TF-9207 and TF 9208, and the production processes are emulsion polymerization and radiation degradation. For both, tf-9207 is more suitable for wear-resistant plastics, because tf-9207 has a primary particle size of 120 m, which is evenly dispersed in the matrix material and forms a transfer film during friction. Therefore, tf-9207 has strong self-lubricating property and can reduce wear factor. According to the data provided by 3M laboratory, the wear factor of PA6 added with tf-9207 micro powder decreased from 200 to 15, while the friction coefficient decreased from 0.26 to 0.19; the wear factor of PA66 decreased from 200 to 12, and the friction coefficient decreased from 0.28 to 0.18. Tf-9208 has better dispersibility than tf-9207, and can be evenly dispersed in the coating. It is suitable for non stick coating and improves the non adhesion and scratch resistance of the coating surface.