Porous fibers, adsorbent material, and purification column

Patent metadata

Field	Value
Publication number	US-10265678-B2
Application number	US-201515521469-A
Country	US
Kind code	B2
Filing date	Oct 20, 2015
Priority date	Oct 28, 2014
Publication date	Apr 23, 2019
Grant date	Apr 23, 2019

Abstract

There are provided porous fibers having excellent removal performance with respect to a material to be purified; and a purification column into which an adsorbent material obtained by bundling the fibers is incorporated. The porous fibers satisfying the following conditions (a) and (b) and having a shape in which three or more projected parts are continuously present in the lengthwise direction on the periphery part of a solid-state fiber: (a) The modification degree Do/Di in a cross section is 1.2 to 6.6 when the diameter of the inscribed circle is denoted by Di and the diameter of the circumscribed circle is denoted by Do., and (b) The specific surface area of pores is 50 m2/g or more.

First claim

The invention claimed is:

1. The porous fibers satisfying the following conditions (a), (b) and (c) and having a shape in which three or more projected parts are continuously present in the lengthwise direction on the periphery part of a solid-state fiber:
(a) when the diameter of an inscribed circle is denoted by Di and the diameter of a circumscribed circle is denoted by Do in a cross section,
a modification degree Do/Di is 1.2 to 6.6, and

(b) the specific surface area of pores is 50 m 2 /g or more, and
(c) surface pore ratio is 30% or less.

2. The porous fibers according to claim 1 , wherein when an average of widths of all projected parts in the cross section is denoted by ω, ω/Di is 0.05 to 2.0.

3. The porous fibers according to claim 1 , wherein the average of widths of all projected parts in the cross section ω is 200 μm or less.

4. The porous fibers according to claim 1 , wherein the porous fibers have a homogeneous structure in a direction of a cross section.

5. The porous fibers according to claim 1 , wherein an average pore radius is 0.5 nm or more and 100 nm or less.

6. The porous fibers according to claim 1 , wherein a pore size distribution index is 1.0 or more and 2.8 or less.

7. The porous fibers according to claim 1 , wherein a surface pore ratio is 0.5% or more and 30% or less.

8. The porous fibers according to claim 1 , wherein a dense layer thickness in the near-surface region of a fiber is 0.01 μm or more.

9. The porous fibers according to claim 1 , wherein a dense layer thickness in the near-surface region of a fiber is 3.90 μm or less.

10. The porous fibers according to claim 1 , wherein an index of pore shape Dxy is 0.2 or more and 6.0 or less.

11. The porous fibers according to claim 1 , wherein a circle equivalent diameter of a cross section is 10 μm or more and less than 300 μm.

12. The porous fibers according to claim 1 , wherein the porous fibers contain an amorphous polymer material.

13. The porous fibers according to claim 12 , wherein the amorphous polymer material is an ester group-containing polymer.

14. An adsorbent material formed by using the porous fibers according to claim 1 as a bundle including the fibers in a ratio of 18% or more.

15. The adsorbent material according to claim 14 which is for medical care application.

16. The adsorbent material for medical care application according to claim 15 , wherein an adsorbed amount of β 2 -microglobulin is 0.005 mg/cm 3 or more.

17. A purification column which is formed by arranging the adsorbent material according to claim 14 in the straight form in a direction of a case axis in a plastic casing and attaching an inlet port and an outlet port of the fluid that is to be treated to both ends of the casing.

Assignees

• Toray Industries

Inventors

• Fujieda Hiroaki
• Ueno Yoshiyuki
• Tanaka Kazumi

Classifications

• A61P7/08

  Plasma substitutes; Perfusion solutions; Dialytics or haemodialytics; Drugs for electrolytic or acid-base disorders, e.g. hypovolemic shock (artificial tears A61P27/04) · CPC title

• B01J20/261

  obtained by reactions only involving carbon to carbon unsaturated bonds (macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds per se C08F) · CPC title

• B01J20/28023 Primary

  Fibres or filaments (fibres or filaments in the form of membranes B01J20/28038; B01J20/28007 takes precedence) · CPC title

• D01F6/00 Primary

  Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof · CPC title

• B01J20/28078

  Pore diameter · CPC title