| 摘要 |
PROBLEM TO BE SOLVED: To manufacture a new composite translucent film of high solute removal performance and also high water permeation performance. SOLUTION: In a composite translucent film formed of a microporous substrate film coated with a microfilm, a microfilm layer is formed of a crosslinking polyamide polymer containing acyl residue composed ofπ-shortage aromatic rings bonded with three carbonyls or more. In that case, theπ-shortage aromatic heterocyclic structure is the pyridine cyclic structure, and it is preferable that the crosslinking polyamide polymer contains units represented by a formula (In the formula,-X represents-H, -CH3 or-NH-).
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