公开(公告)号：US10737223B2

公开(公告)日：2020-08-11

申请号：US16101369

申请日：2018-08-10

申请人： Lotte Chemical Corporation

发明人： Chang Min Seo ,  Gyeong Mo Lee

IPC分类号： B01D69/08 ,  B01D69/02 ,  B01D71/34 ,  B29C70/22 ,  D04C1/06 ,  D06B1/02 ,  D06B21/00 ,  B29K469/00 ,  B29K227/06 ,  B29K267/00 ,  B29K269/00 ,  B29K427/12 ,  B29K431/00 ,  B29K631/00 ,  B29K669/00 ,  B29K233/04 ,  B29K225/00 ,  B01D61/14 ,  B29K27/00 ,  B29K31/00 ,  B29K69/00 ,  B29K309/08 ,  B29K277/00 ,  B29K231/00 ,  B29K627/12 ,  B29K227/12

摘要： A hollow fiber membrane is formed by embedding a braid having a spiral open weave of monofilaments only, to avoid a “whiskering” problem. The open weave is characterized by contiguous, circumferential, rhomboid-shaped areas of polymer film separated by monofilaments. When the braid is supported on a plasticized PVA cable having a scalloped periphery, the braid can be infiltrated with membrane polymer which, when coagulated, embeds the braid positioning it around the lumen. The embedded spiral weave, free of any circumferentially constricting monofilament, allows the membrane to be biaxially distensible. The membrane has “give” not only in the axial or longitudinal direction but also in the radial direction. “Give” in the radial direction permits soiled membranes to be backwashed under higher pressure than in a comparable braid which is not radially distensible.