公开(公告)号：US11986777B2

公开(公告)日：2024-05-21

申请号：US17309691

申请日：2019-12-23

Applicant: Solventum Intellectual Properties Company

Inventor： Kuan-Yin Lin ,  James C. DeLozier ,  Aurore Y. J. Mercelat ,  Mark McCormick ,  Jinsheng Zhou

IPC: B01D53/22 ,  B01D67/00 ,  B01D69/02 ,  B01D69/08 ,  B01D71/26 ,  B01D19/00

CPC classification number: B01D69/02 ,  B01D53/228 ,  B01D67/0027 ,  B01D69/088 ,  B01D71/261 ,  B01D71/262 ,  B01D19/0031 ,  B01D2053/224 ,  B01D2325/022 ,  B01D2325/04

Abstract: Hollow fiber membranes, membrane contactors, and related production and use methods. The membranes include a substrate having a multiplicity of pores and a skin layer overlaying the porous substrate. The porous substrate includes a first semi-crystalline thermoplastic polyolefin (co)polymer resin and a nucleating agent in an amount effective to achieve nucleation. The skin layer includes a second semi-crystalline thermoplastic polyolefin (co)polymer resin derived by polymerizing at most 98 wt. % of 4-methyl-1-pentene monomer with at least 2 wt. % of linear or branched alpha olefin monomers. Preferably, the first thermoplastic polyolefin (co)polymer is different from the second thermoplastic polyolefin (co)polymer. The skin layer is less porous than the porous substrate and forms an outer surface of the hollow fiber with the porous substrate forming an inner surface. The hollow fibers are formed by co-extruding the porous substrate resin and the skin layer resin through an annular die.