POLYVINYLIDENE FLUORIDE HOLLOW FIBER FILM WITH DUAL PROTECTING LAYER CAPABLE OF PREVENTING WATER POLLUTION AND A METHOD OF MAKING THE SAME

摘要

PURPOSE: A polyvinylidene fluoride hollow fiber film and a method of making the same are provided to prevent water pollution by a dual protecting layer.;CONSTITUTION: A polyvinylidene fluoride hollow fiber film comprises a secondary blocking layer(30). A polyvinylidene fluoride with the secondary blocking layer comprises a hollow supporting layer(40), the second protecting layer, an active supporting layer(20) and an active and separated layer(10). The hollow supporting layer is 100-300 micrometers thick and has holes with an average diameter of 5-20 micrometers.;COPYRIGHT KIPO 2013