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Porous fiber and adsorption column

A porous fiber and fiber technology, applied in the field of porous fiber, can solve the problems of powder particle damage, undesired activation of blood, etc., and achieve the effect of improving adsorption performance and inhibiting exposure

Active Publication Date: 2019-11-26
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the liquid to be treated is in direct contact with the powder or grain, the powder or grain may be damaged due to the flow stress generated when the liquid to be treated is passed through, or the powder or grain may flow out from the fiber carrying the powder or grain, etc.
Furthermore, in the case of using blood as the liquid to be treated, there is a possibility that the blood may be undesirably activated if the powder particles are in direct contact with the blood cell components.

Method used

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  • Porous fiber and adsorption column
  • Porous fiber and adsorption column
  • Porous fiber and adsorption column

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~2

[0138]

[0139] First, a 21% by mass PMMA stock solution was prepared. 31.7 parts by mass of a mass-average molecular weight of 400,000 syndiotactic-PMMA (syn-PMMA, manufactured by Mitsubishi Rayon Co., Ltd., "Dayyaner" BR-85), 31.7 parts by mass of a mass-average molecular weight of 1.4 million syn -PMMA (Sumitomo Chemical Co., Ltd., "Sumipex" AK-150), 16.7 parts by mass of isotactic-PMMA (iso-PMMA, manufactured by Toray Co., Ltd.) with a mass average molecular weight of 500,000, 20 parts by mass of A PMMA copolymer with a molecular weight of 300,000 (manufactured by Toray Co., Ltd.) containing 1.5 mol% of sodium p-styrene sulfonate was mixed with 376 parts by mass of dimethyl sulfoxide (DMSO), stirred at 110°C for 8 hours, and prepared spinning stock solution.

[0140] Here, in Example 1, 190 g of dimethyl sulfoxide and 100 g of titanium oxide particles serving as a phosphorus adsorbent were added to 476 g of the spinning dope obtained above to prepare a powder containing...

Embodiment 3

[0176]

[0177] A plurality of porous fibers obtained in Example 1 were each filled in a polycarbonate cylindrical casing with an inner diameter of 10 mm and an axial length of 17.8 mm.

[0178] More specifically, the wires with a diameter of 290 μm obtained in Example 1 were cut to a length of 17.8 mm, and a total of 655 wires were filled to obtain a column with a filling rate of 55.1%. Next, a mesh filter made of polypropylene with a mesh equivalent diameter of 84 μm and an opening ratio of 36% was attached to the inflow and outflow ports of the liquid to be treated on both end faces of the column. Finally, a cap called a head having an inflow port and an outflow port of the liquid to be treated is attached to the end of the casing to obtain an adsorption column. The resulting adsorption column was evaluated based on the following . The results are shown in Table 3.

Embodiment 4

[0180] The filaments with a diameter of 170 μm obtained in Example 2 were cut to a length of 17.8 mm, and a total of 760 filaments were filled in the same adsorption column as in Example 3 to obtain an adsorption column with a filling rate of 22.2%. The resulting adsorption column was evaluated based on the following . The results are shown in Table 3.

[0181]

[0182] As the adsorption performance evaluation, the phosphorus adsorption performance of the adsorption column was measured. Bovine plasma was obtained in the same manner as in the adsorption performance evaluation of Examples 1 to 2 and Comparative Examples 1 to 3 above. For this bovine plasma, adjust so that the total protein amount reaches 6.5±0.5 g / dL. It should be noted that, as the bovine plasma, plasma within 5 days after blood collection was used. Next, dissolve 7.85 mg of disodium hydrogen phosphate (Na 2 HPO 4 ) and 3.45 mg of potassium dihydrogen phosphate (KH 2 PO 4 ), making a treated liquid tha...

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Abstract

The purpose of the present invention is to provide: a porous fiber that exhibits both improved adsorption capacity, and suppressed exposure and detachment of particulates; an adsorption column filledwith said porous fiber; and a blood purification system in which an adsorption column is connected to a water removal column. In order to achieve this purpose, the porous fiber according to the present invention has the following constitution. Specifically, the porous fiber according to the present invention has a three-dimensional pore structure formed by a solid fiber, and satisfies all of the following conditions. (1) The porous fiber has particulates having a diameter of not more than 200 [mu]m, and the percentage of area occupied by said particulates having a diameter of not more than 200[mu]m in a horizontal cross section of the three-dimensional pore structure is at least 3.0%. (2) The porous fiber does not contain said particulates having a diameter of not more than 200 [mu]m in the region within 1.0 [mu]m in the depth direction from the outermost surface.

Description

technical field [0001] The present invention relates to porous fibers. Furthermore, it relates to adsorption columns filled with porous fibers. Furthermore, it relates to the blood purification system which connected the adsorption column and the water removal column. Background technique [0002] Conventionally, powders and granules have been used as adsorbents in order to adsorb and remove substances to be removed in liquids to be treated. Powder and granular materials are not easy to handle when they are alone, so they are used as a load on fibers and the like. In this case, in order to improve the adsorption performance of the powder or grain to the substance to be removed, it is necessary to shorten the distance between the liquid to be treated and the powder or grain as much as possible. However, if the liquid to be treated is in direct contact with the powder or grain, the powder or grain may be damaged or the powder or grain may flow out from the fiber carrying th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/00A61M1/36B01D15/00B01J20/20B01J20/28C01G23/047D01F6/52D01F8/10
CPCB01J20/20D01F6/00D01F6/52D01F8/10D01D5/247B01J20/28023B01J20/28028B01J20/28078B01J20/28092B01J20/28057B01J20/28004B01J20/261B01J20/3092B01J20/3085B01J20/28021B01J20/205B01J20/3295B01J20/3293A61M1/3679A61M1/3486D01F1/10D01D5/34B01D15/00C01G23/047A61M1/1621B01D15/1871B01J20/0207B01J20/0277B01J20/06B01J20/28026B01J20/28052B01J20/28059B01J20/2808B01J20/28083B01J20/28085B01J20/285B01J2220/46D01F6/16D10B2401/10D10B2509/00
Inventor 韩爱善藤枝洋暁上野良之
Owner TORAY IND INC
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