abstract |
The porous hollow fiber membrane of the present invention is a porous hollow fiber membrane made of a fluororesin polymer and has a columnar structure oriented in the longitudinal direction of the porous hollow fiber membrane, and is a molecule of a fluororesin polymer. The chains are oriented in the longitudinal direction of the porous hollow fiber membrane, and the average value ν of Raman orientation parameters of the molecular chains is 1.5 or more and 4.0 or less. |