ECTFE Water Film Grade Resin 1.Product� Introduction The ECTFE water film grade resin is white powder, which has excellent chemical corrosion resistance, and the ph value range is 1-14.hollow fiber membranes can be prepared by the TIPS method for special occasions such as high-concentration wastewater, organic solvents and lye recovery, especially for the treatment of alkaline. 2.Technical Parameter Item Test Method Unit Value Density ASTM D792 g/cm3 1.66~1.68 Water Absorption ASTM D570 %