Permanent hydrophilic polytetrafluoroethylene microporous membrane and method for preparing same

• Main Authors: HUAPENG ZHANG, XINMIN HAO, YUHAI GUO
• Format: Patent
• Language: English
• Published: 29.06.2005
• Edition: 7
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

Disclosed are an internal hydrosoluble polytetrafluoroethylene film with micro holes for antibacterial in water and its preparing method. Mix the hydrophilic material and varicosity polytetrafluoroethylene resin powder, acquire the product through pressure, degreasing, extension and burning. The invention has solved the problem of internal hydrosoluble, it has simple technique and low cost, with the smallest bubble point pressure of 1.0-1.8kg/cm2, water filtration speed of 1-3m3/m2h (pressure of filtration is 0.006-0.009Mpa), can be directly applied in filtration of antibacterial in water, with remarkable economic and social benefits.