German nonwovens equipment manufacturer Leifen's Lekofil technology has reached its fifth generation, what are the characteristics between the generations? What companies in China are using

The world spunbond nonwoven technology is mainly Germany Leifen's Lecofil technology, Italy's STP technology, Japan's Kobe Steel technology. The current situation, nonwoven masks, especially with Leifen technology to become the world's mainstream technology. At present, it has developed to the fourth generation technology. Characterized by the use of negative pressure, ultra-high-speed airflow drafting, non-woven products, fibers can be stretched to about 1 denier. There have been many domestic enterprises to copy, nonwoven fabrics, due to its core technology, there are many cutting-edge issues have not yet been resolved or mastered, the domestic equipment manufacturing enterprises to reach the level of Leifen technology is still waiting for time.