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Production manner and thermoplasticity polyurethane resin make porous material null thermoplasticity polyurethane resin of thermoplasticity polyurethane
Production manner and thermoplasticity polyurethane resin make porous material null thermoplasticity polyurethane resin of thermoplasticity polyurethane
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机译:生产方式和热塑性聚氨酯树脂使多孔材料无效热塑性聚氨酯树脂
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摘要
PROBLEM TO BE SOLVED: To produce a porous material from a thermoplastic polyurethane resin and having a reticular structure freed from a dense skin layer on the surface part and being uniform as a whole.;SOLUTION: A method for producing the porous material from a thermoplastic polyurethane resin comprises the steps of: immersing a polymer dope containing a thermoplastic polyurethane resin, at least one water-soluble polymer compound selected from the group consisting of an oligosaccharide having at least one α-1,4 bond or β-1,4 bond, a polysaccharide, and a derivative thereof, and an oxygenous or nitrogenous organic solvent containing oxygen or nitrogen in the molecule in a coagulating bath containing a hydrophilic organic solvent; thereby extracting and removing the oxygenous or nitrogenous organic solvent to coagulate the thermoplastic polyurethane resin; and removing the water-soluble polymer compound and the hydrophilic organic solvent. The polymer dope is held in a partitioning member through at least a part of which the hydrophilic organic solvent can pass and is then immersed in the coagulating bath.;COPYRIGHT: (C)2003,JPO
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