| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a porous hollow fiber membrane based on polyacetal, capable of manufacturing it at a low cost, excellent in durability and dimensional stability and particularly having a low formaldehyde residual concentration, and a method for manufacturing the same. <P>SOLUTION: In the porous hollow fiber membrane made of a polyacetal resin containing 60% or more of an acetal unit, the formaldehyde concentration is 100 ppm or less. <P>COPYRIGHT: (C)2013,JPO&INPIT |
