| 摘要 |
PURPOSE:To produce a PVA-based chelate fiber capable of being processed into various forums by the utilization of its fibrous advantage, and enabling its employment in fields having not been applied by the use of resins. CONSTITUTION:The method for producing an amino phosphoric acid type chelate fiber comprises mixing PVA having a saponification degree of >=98mol.% and an average polymerization degree of >=800 with PEI having a mol.wt. of >=65000 in a mixing ratio of 95:5 to 50:50, dry-spinning the prepared spinning raw solution, crosslinking the produced fiber with a crosslinking agent, and subsequently immersing the crosslinked fiber in a reaction bath containing phosphorous acid, formaldehyde and an acid catalyst. |
