| 摘要 |
Process for the manufacture of an organic porous material, and especially of an organic semipermeable membrane, of the type consisting in dissolving a polymer in a solvent, extruding the solution thus obtained and precipitating it. This process is characterised in that it consists in extruding the said solution through a die endowed with a plurality of separate conducts, inside which at least one fluid, called centring fluid, is introduced, and outside which the solution is circulated so as to form an extrudate endowed with a plurality of lengthwise channels 23 which is precipitated to obtain the said organic porous material. <IMAGE>
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