| 摘要 |
<p>A poly(m-phenyleneisophthalamide) porous hollow fiber membrane is produced by ejecting a spinning solution containing poly(m-phenyleneisophthalamide), polyvinylpyrrolidone and an inorganic salt through a double annular nozzle with the temperature of the spinning solution kept at 70°C or above, spinning the ejected solution by a dry-wet spinning method, and subjecting the resulting fibers to treatment with a humectant. It is preferable that the poly(m-phenyleneisophthalamide) porous hollow fiber membrane be heat-treated in water at 80°C or above after the dry-wet spinning and prior to the treatment with a humectant. The poly(m-phenyleneisophthalamide) porous hollow fiber membrane exhibits a breaking strength of 10 MPa or above and a breaking extension of 80% or above after the wet heat treatment under the conditions of 100 °C and 80% humidity for 1000 hours or above with the breaking extension after the wet heat treatment kept at a level of at least 80 % of the breaking extension before the wet heat treatment, and is excellent in wet heat resistance and humidifying performance, thus being useful as humidifying membrane for solid polymer type fuel cells.</p> |
