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Non-woven fabric for semipermeable membrane support

A non-woven fabric and semi-permeable membrane technology, used in the field of non-woven fabrics, can solve the problems of poor air permeability, poor air permeability of the support body, and reduced sheet strength, etc., to improve adhesion, maintain smoothness, The effect of good thickness uniformity

Active Publication Date: 2014-10-08
HOKUETSU KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since thin fibers are used in the middle layer, there is a problem that the air permeability of the support body deteriorates
[0027] In the technique of Patent Document 7, when the sheet containing pulp for papermaking is wetted with water during actual use, the strength of the sheet is greatly reduced, and the air permeability becomes poor.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Non-woven fabric for semipermeable membrane support
  • Non-woven fabric for semipermeable membrane support
  • Non-woven fabric for semipermeable membrane support

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067]

[0068] 22 kg of a commercially available polyester main fiber (trade name: EP133, manufactured by Kuraray Co., Ltd.) having a thickness of 1.45 decitex and a cut length of 5 mm and a commercially available polyester fiber having a thickness of 1.2 dtex and a cut length of 5 mm were used. 8 kg of commercially available polyester binder fibers (trade name: TR07N, manufactured by Teijin Textile Co., Ltd.) were thrown into water, and dispersed by a disperser for 5 minutes to obtain a fiber raw material slurry with a fiber concentration of 1% by mass.

[0069]

[0070] Water was poured into the fiber raw material slurry 1, and after overall dilution, the fiber slurry with a fiber density|concentration of 0.03 mass % was obtained.

[0071]

[0072] The fiber pulp was put into the head box of the short-wire paper machine for papermaking, and then dried by a drum dryer with a surface temperature of 120° C. until the sheet was completely dry to obtain continuous winding b...

Embodiment 2

[0076]

[0077] Same as Example 1.

[0078]

[0079] Same as Example 1.

[0080]

[0081] Same as Example 1.

[0082]

[0083] In Example 1, the speed of the assembly line was adjusted to 17 m / min, and the rest was the same as in Example 1, thereby obtaining a nonwoven fabric for a semipermeable membrane support.

Embodiment 3

[0085]

[0086] Same as Example 1.

[0087]

[0088] Same as Example 1.

[0089]

[0090] Same as Example 1.

[0091]

[0092] In Example 1, the surface temperature of the metal roller was adjusted to 190° C., the speed of the assembly line was adjusted to 12 m / min, and the rest was the same as in Example 1, thereby obtaining a nonwoven fabric for a semipermeable membrane support.

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Abstract

The purpose of the present invention is to provide a non-woven fabric for a semipermeable membrane support, which can provide good adhesion of a semipermeable membrane to a support, can make the thickness of the semipermeable membrane uniform and does not undergo the penetration of a coating solution through the non-woven fabric. The non-woven fabric for a semipermeable membrane support according to the present invention is a non-woven fabric mainly composed of organic synthetic fibers and has a semipermeable membrane supported on one surface thereof, wherein each of a coating surface of the non-woven fabric, which is a surface to be coated with the semipermeable membrane, and a non-coating surface of the non-woven fabric, which is a surface opposed to the coating surface, has a Bekk smoothness degree of 5 seconds or more and the internal bond strength of the non-woven fabric falls within the range from 0.4 to 0.8 Nm as measured in the sheet lateral direction.

Description

technical field [0001] The invention relates to a non-woven fabric, in particular to a semi-permeable membrane used in the manufacture of semi-permeable membranes such as ultrafiltration membranes, microfiltration membranes, and reverse osmosis (RO) membranes with separation functions, which can be used as a support for the production of filter membranes to reinforce semi-permeable membranes. A nonwoven fabric for a semipermeable membrane support for the purpose of membrane penetration. Background technique [0002] Semipermeable membranes are widely used in the removal of impurities in beverages and industrial water, desalination of seawater, removal of bacteria in food, treatment of wastewater, and biochemical fields. [0003] The semipermeable membrane can be selected from cellulose resin, polyvinyl alcohol resin, polysulfone resin, polyamide resin, polyimide resin, polyacrylonitrile resin, polyester resin, and fluorine resin according to its application. and other high ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/10B01D71/48D04H1/435D04H1/542D21H13/24
CPCB32B27/12D04H1/542B32B2307/7265B32B5/022B01D69/10Y10T442/2861D04H1/44B32B2307/726D21H13/24D04H1/435B32B2255/02D04H1/64B32B2262/0276B01D69/1071
Inventor 楚山智彦根本纯司浜边久嗣
Owner HOKUETSU KK
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