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Filter for water treatment filtering and method for producing same

A filter and water treatment technology, applied in chemical instruments and methods, water/sludge/sewage treatment, osmotic/dialysis water/sewage treatment, etc., can solve the problems of shortened life, insufficient hypochlorite resistance, etc. Achieve long life, reduce the frequency of replacement and maintenance, and improve chemical resistance

Active Publication Date: 2013-11-27
W L GORE & ASSOC GK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, although polyvinyl alcohol is an excellent hydrophilizing agent capable of resisting strong acids and strong alkalis, its resistance to hypochlorite is insufficient, so the filters of Patent Documents 1 to 3 cannot solve the problem of shortened life due to cleaning. question

Method used

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  • Filter for water treatment filtering and method for producing same
  • Filter for water treatment filtering and method for producing same
  • Filter for water treatment filtering and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] (1) Preparation of hydrophilic extended polytetrafluoroethylene porous membrane

[0110] Laminate a microporous polytetrafluoroethylene membrane (manufactured by Japan Goatex Co., Ltd., product name "SM9-54020", with a pore diameter of 0.2 μm and a thickness of 200 μm) with a polyester non-woven fabric in advance. Body) was immersed in ethanol, the ethanol was replaced by pure water, and then immersed in a 1.0% by mass polyvinyl alcohol aqueous solution (manufactured by Kuraray, product name "PVA-107"). Next, ethylene glycol diglycidyl ether as a crosslinking agent was mixed in a 0.2% potassium hydroxide aqueous solution so that the concentration became 2.0% by mass, and the film was immersed in the mixed solution. Annealing was performed at 150° C. for 10 minutes under atmospheric pressure. Then, washing was performed by immersing in boiling water for 30 minutes, followed by drying to obtain a hydrophilic extended polytetrafluoroethylene porous membrane (hereinafter, ...

Embodiment 2

[0118] Except having used 0.429g of BL5335 in said Example 1, and having made the aqueous solution concentration into 0.5%, the filter material for filters was manufactured similarly.

Embodiment 3

[0120] Except having used 0.696g of BL5335 in said Example 1, and having made the aqueous solution concentration into 0.8%, the filter material for filters was manufactured similarly.

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Abstract

The problem addressed by the present invention is to provide: a filter for water treatment filtering having a long use life and having the mutually contrary characteristics of being hydrophilic and chemical resistant; and a method for producing the filter. The filter for water treatment filtering is characterized by: comprising a porous substrate having a hydrophilic coating layer; the hydrophilic coating layer having a high electron density site and a cross-linked hydrophilic polymer; the hydrophilic polymer in the cross-linked hydrophilic polymer being cross linked by a saturated aliphatic hydrocarbon group that may contain at least one functional group selected from the group consisting of an ether group, a hydroxyl group, and an amine group; and the high electron density site having Pi electrons and being covalently bonded to the cross-linked hydrophilic polymer.

Description

technical field [0001] The invention relates to a filter material for water treatment filters, a water treatment filter containing the filter material, a water treatment device containing the water treatment filter, a manufacturing method of the filter material, and a filter material for improving water treatment filters antioxidant method. Background technique [0002] Removal of insoluble components is important when performing drainage from factories, etc., purification treatment of sewage, or utilization of groundwater. For this removal, a filter for water treatment is generally used. [0003] In addition to the natural accumulation of insoluble components due to use, water treatment filters also adhere to a mixture of microorganisms and their extracellular products, that is, biofouling (Japanese: バイオァァウリング). If left unattended, clogging will occur, so the water treatment filter must be cleaned regularly. However, biofouling cannot be easily removed because it is a de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/02B01D69/00B01D71/36B01D71/82C02F1/44C08J9/36C08J7/056
CPCB01D71/36C08J2327/18B01D71/38B01D69/12B01D2323/30C02F2303/20B01D2325/30C08J2429/04C08J9/365C02F1/44B01D2325/36C08J7/04C08J7/056B01D69/02B01D71/381
Inventor 小椋友佳山川启一
Owner W L GORE & ASSOC GK
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