METHOD FOR MANUFACTURING A POLYTETRAFLUOROETHYLENE POROUS MEMBRANE WITH IMPROVED WATER FLUX AND COLLECTION EFFICIENCY AND THE POLYTETRAFLUOROETHYLENE POROUS MEMBRANE FOR A LIQUID FILTER MANUFACTURED THEREBY

摘要

PURPOSE: A polytetrafluoroethylene porous membrane is provided to ensure high water flux even if a polytetrafluoroethylene porous membrane has the same or similar average pore size region and to solve the degradation of flux and removal efficiency. ;CONSTITUTION: A method for manufacturing a polytetrafluoroethylene porous film comprises the steps of: (i) fibrillating polytetrafluoroethylene particles through the friction caused by the rotation; (ii) injecting a polytetrafluoroethylene paste in which 5-30 parts by weight of liquid lubricants and 100 parts by weight of the fibrillated polytetrafluoroethylene are mixed, into a dice, forming a polytetrafluoroethylene sheet through extrusion molding; (iii) removing liquid phase lubricants from the polytetrafluoroethylene sheet, and biaxially orienting the sheet; and (iv) sintering the resultant.;COPYRIGHT KIPO 2011