▎ 摘　　要

NOVELTY - Preparing waterproof and breathable nanofiber membrane involves pulverizing thermoplastic polyurethane, polymer nanofibers, graphene, polyethylene, hydroxyethyl cellulose, nano titanium dioxide and nano silica particles into inside the furnace, placing molten liquid into the mixer, placing polylactic acid and film forming assistant into the mixer, placing mixed materials into the extruder, adopting vented twin-screw granulator to granulate, and making spinning polymer after extrusion and pelletizing, melting prepared spinning polymer under high temperature and high pressure air condition, receiving by the receiving plate, nanofibers with diameter of 10-200 nanometer, obtaining base film after hot pressing. The starch, protein, polyacrylic acid, polyacrylamide and polyphthalamide are placed into the furnace. The melt is placed into the mixer, and then acetone, dichloromethane and dimethyl formaldehyde is placed into the mixer. USE - Method for preparing waterproof and breathable nanofiber membrane. ADVANTAGE - The method enables to prepare waterproof and breathable nanofiber membrane that expands the overall use range and service life of the film, improves market competitiveness, overall toughness, antibacterial, UV resistance and strength of the film, and conforms to company own interests. DETAILED DESCRIPTION - Preparing waterproof and breathable nanofiber membrane involves pulverizing thermoplastic polyurethane, polymer nanofibers, graphene, polyethylene, hydroxyethyl cellulose, nano titanium dioxide and nano silica particles into inside the furnace, placing molten liquid into the mixer, placing polylactic acid and film forming assistant into the mixer, placing mixed materials into the extruder, adopting vented twin-screw granulator to granulate, and making spinning polymer after extrusion and pelletizing, melting prepared spinning polymer under high temperature and high pressure air condition, receiving by the receiving plate, nanofibers with diameter of 10-200 nanometer, obtaining base film after hot pressing. The starch, protein, polyacrylic acid, polyacrylamide and polyphthalamide are placed into the furnace. The melt is placed into the mixer, and then acetone, dichloromethane and dimethyl formaldehyde is placed into the mixer. The agitated material is placed into the electrostatic spinning machine, and sprayed on the surface of the base membrane under high pressure to obtain hydrophilic membrane. The PTFE, fluorinated polyethylene, fluorocarbon wax, polyolefin, polycarbonate and polyamide are placed into the furnace, then melt is placed into the mixer, and then vinyl acetate and tetrahydrofuran are placed into the mixer. The agitated material is placed into the electrostatic spinning machine, and sprayed on the bottom surface of the base film under high pressure to obtain hydrophobic film. The obtained film is squeezed in squeeze roller to obtain predetermined thickness. The extruded film is sent into the drying mechanism for drying treatment. The dried film is wound into rolls and cut them into different widths as needed, then packed and stored after passing the inspection.