Since the outbreak of the epidemic, masks have become the most needed prevention materials. Their core material "meltblown cloth" is thus in short supply, and its price has increased from about 30,000 yuan per ton to 300,000 to 400,000.

Sun Chenglei, a 2005-grade graduate student majoring in business management at Zhejiang University of Finance and Economics, led his team to successfully develop a new epidemic prevention material called nano-scale coated filter material, which can replace "meltblown cloth". The material has passed the tests of the National Textile and Garment Product Quality Supervision and Inspection Center, Zhejiang Institute of Light Industry Product Quality Inspection and other professional inspection organizations, and has been successfully put into production and exported to overseas markets.

This nano-scale film covering material is a new type of recyclable epidemic prevention mask material. It is a type of low-resistance, high-efficiency and easy-to-clean film composite material that can be used repeatedly for more than 10 times after simple high-temperature disinfection and steaming and boiling disinfection, which has greatly relieved short supply of core materials for mask manufacturing.

During the resumption of work and production, with the joint efforts of the team and after 10 days of tests and research, the R&D of this material was finally finished.