PURPOSE: a kind of manufacture flat composite membrane and the separation process to improve efficiency that thus manufactures of above-mentioned flat composite membrane, and be evenly distributed hole and there is no pin hole. ;CONSTITUTION: the preparation method of flat composite membrane includes the following steps: the side for applying liquid (2) polymer support (3); Form the other side of low pressure atmosphere and fluid bearings body; With the solidification carrier and non-solvent. The flat composite membrane of the manufacturing method further includes that step removal remaining solvent passes through processing composite membrane and hot water. Fluid is liquid, air or nitrogen, including water, alcohol, & gamma; Gamma-butyrolacton, dimethylformamide, n-methyl-2-pyrrolidone, dimethyl acetamide or dimethyl sulfoxide. ;The 2010 of copyright KIPO submissions
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