公开(公告)号：US20170216780A1

公开(公告)日：2017-08-03

申请号：US15328115

申请日：2015-07-21

Applicant: Arkema Inc.

Inventor： Walter P. Kosar ,  Roderick Reber ,  Gregory S. O'BRIEN ,  Scott R. GABOURY ,  Roice A. WILLE

IPC: B01D71/38 ,  B01D71/36 ,  D01F6/12 ,  D01D5/247 ,  D01F1/08 ,  B01D71/34 ,  B29C47/00

CPC classification number: B01D71/38 ,  B01D69/02 ,  B01D69/08 ,  B01D71/32 ,  B01D71/34 ,  B01D71/36 ,  B01D71/76 ,  B01D2323/12 ,  B01D2323/18 ,  B01D2325/24 ,  B29C47/0004 ,  B29C47/0014 ,  B29C47/0026 ,  B29K2027/16 ,  B29L2023/00 ,  B29L2031/755 ,  D01D5/247 ,  D01F1/08 ,  D01F6/12

Abstract: Hollow fiber membranes having improved toughness and durability are prepared using a vinylidene fluoride polymer-containing component, such as Kynaro resins, having relatively low crystallinity. One aspect of the invention provides a membrane in the form of a fiber, wherein i) the fiber has a porous wall of a polymeric component enclosing a central hollow space extending the length of the fiber, ii) the polymeric component has a crystallinity as determined by wide angle x-ray diffraction of less than about 35%, iii) the polymeric component is comprised of at least one homopolymer or copolymer of vinylidene fluoride and iv) the membrane has an energy to break of at least about 0.5 J per square mm of membrane cross section.