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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10046281 B1

PDFFull Text
Date of Patent:
Aug. 14, 2018

Filed:

Oct. 24, 2012

Monofilament-reinforced hollow fiber membrane with scalloped lumen

Applicant:

Cheil Industries Inc., Gumi-si, Gyeongsangbuk-do, KR;

Inventors:

Chang Min Seo, Hwaseong-si, KR;

Gyeong Mo Lee, Uiwang-si, KR;

Assignee:

LOTTE CHEMICAL CORPORATION, Seoul, KR;

Attorney:

Lewis Roca Rothgerber Christie LLP

Primary Examiner:

Krishnan S Menon

Int. Cl.
CPC ...
B01D 69/08 (2006.01); B01D 71/34 (2006.01); B01D 61/14 (2006.01); D04C 1/06 (2006.01); D06B 1/02 (2006.01); D06B 21/00 (2006.01); B29C 70/22 (2006.01); B29K 469/00 (2006.01); B29K 227/06 (2006.01); B29K 267/00 (2006.01); B29K 269/00 (2006.01); B29K 669/00 (2006.01); B29K 27/00 (2006.01); B29K 31/00 (2006.01); B29K 69/00 (2006.01); B29K 309/08 (2006.01); B29K 277/00 (2006.01);
U.S. Cl.
CPC ...
B01D 69/08 (2013.01); B01D 69/082 (2013.01); B01D 69/087 (2013.01); B01D 71/34 (2013.01); B29C 70/222 (2013.01); D04C 1/06 (2013.01); D06B 1/02 (2013.01); D06B 21/00 (2013.01); B01D 61/145 (2013.01); B01D 61/147 (2013.01); B01D 2323/42 (2013.01); B01D 2325/40 (2013.01); B29K 2027/16 (2013.01); B29K 2031/04 (2013.01); B29K 2069/00 (2013.01); B29K 2225/06 (2013.01); B29K 2227/06 (2013.01); B29K 2227/16 (2013.01); B29K 2231/04 (2013.01); B29K 2233/08 (2013.01); B29K 2267/00 (2013.01); B29K 2269/00 (2013.01); B29K 2277/00 (2013.01); B29K 2309/08 (2013.01); B29K 2427/16 (2013.01); B29K 2431/04 (2013.01); B29K 2469/00 (2013.01); B29K 2627/16 (2013.01); B29K 2631/04 (2013.01); B29K 2669/00 (2013.01); B29K 2827/16 (2013.01); B29K 2831/04 (2013.01); B29K 2869/00 (2013.01);
Abstract

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 monofilament. 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.

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