Lotte Chemical Corporation

Samsung Sdi Co., Inc.

Cheil Industries Inc.

Gyeong Mo Lee

Chang Min Seo

Myoung Won Park

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. &#x201c;Give&#x201d; in the radial direction permits soiled membranes to be backwashed under higher pressure than in a comparable braid which is not radially distensible.

Monofilament-reinforced hollow fiber membrane with scalloped lumen

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. &#x201c;Give&#x201d; in the radial direction permits soiled membranes to be backwashed under higher pressure than in a comparable braid which is not radially distensible.

A tubular braid, a hollow fiber membrane using the same, and a manufacturing method thereof. A hollow fiber membrane can maximize or increase adhesion between a polymer coating film and a tubular braid; significantly reduce degradation of film properties caused by non-uniform coating, that is, reduce leakage; obtain a higher percent rejection; and achieve high water permeability since the hollow fiber membrane has a larger inner diameter.

Tubular braid, hollow fiber membrane using the same, and manufacturing method thereof

A hollow fiber membrane is formed by embedding a braid having a spiral open weave of monofilaments only, to avoid a 'whiskering' problem common in prior art multifilament braid-supported tubular membranes. 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 it can be infiltrated with membrane polymer which, when coagulated embeds the braid positioning it around the lumen. The spiral weave, free of any circumferentially constricting monofilament, when embedded in film, allows the membrane to be biaxially distensible. In other words, the membrane has 'give' not only in the axial or longitudinal direction but also in the radial direction. &#x201c;Give&#x201d; in the radial direction permits soiled membranes to be backwashed under higher pressure than in a comparable braid which is not radially distensible.

Growing community of inventors

Uiwang-si, South Korea

Gyeong Mo Lee