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Nonwoven fabric for semipermeable membrane supporting body and method for manufacturing same

A manufacturing method, semi-permeable membrane technology, applied in semi-permeable membrane separation, textiles and papermaking, chemical instruments and methods, etc., can solve the problems of many MD curls, difficult tensile strength ratio, etc.

Active Publication Date: 2014-10-29
HOKUETSU KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] The technique of Patent Document 1 has the following problems: it is difficult to control the tensile strength ratio by a paper machine, and even if this method is used, MD curls often occur

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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  • Nonwoven fabric for semipermeable membrane supporting body and method for manufacturing same
  • Nonwoven fabric for semipermeable membrane supporting body and method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073]

[0074] 22 kg of commercially available polyester main fiber (trade name: EP133, manufactured by Kuraray Co., Ltd.) with a thickness of 1.45 decitex and a cut length of 5 mm and 8 kg of a thickness of 1.2 decitex and a cut length of 5 mm commercially available polyester binder fiber (trade name: TR07N, manufactured by Teijin Fibers, Ltd.) was put into water, and dispersed for 5 minutes by a disperser to obtain a fiber raw material slurry with a fiber component concentration of 1% by mass. material.

[0075]

[0076] Water was added to the fiber raw material slurry 1 to dilute the whole to obtain a fiber slurry having a fiber component concentration of 0.03% by mass.

[0077]

[0078] The fiber slurry was put into the head box (head box) of the short-wire paper machine, and after the fiber slurry was made into paper, it was dried by a Yankee dryer with a surface temperature of 120°C to obtain a continuous roll. Take the original paper.

[0079]

[0080] Metal ...

Embodiment 2

[0082]

[0083] The same operation as in Example 1 was carried out.

[0084]

[0085] The same operation as in Example 1 was carried out.

[0086]

[0087] The same operation as in Example 1 was carried out.

[0088]

[0089] In Example 1, the roll surface temperature of the upper roll / lower roll was set to 192°C / 178°C, and the base paper was subjected to hot-press processing in such a way that the Yankee dryer contact surface of the base paper was in contact with the lower roll. Otherwise, it carried out similarly to Example 1, and obtained the nonwoven fabric for semipermeable membrane support bodies.

Embodiment 3

[0091]

[0092] The same operation as in Example 1 was carried out.

[0093]

[0094] The same operation as in Example 1 was carried out.

[0095]

[0096] The same operation as in Example 1 was carried out.

[0097]

[0098] In Example 1, the roll surface temperature of the upper roll / lower roll was set to 195°C / 175°C, and the base paper was subjected to hot-press processing in such a way that the contact surface of the Yankee dryer of the base paper was in contact with the lower roll. Otherwise, it carried out similarly to Example 1, and obtained the nonwoven fabric for semipermeable membrane support bodies.

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Abstract

The present invention addresses the problem of providing a nonwoven fabric for a semipermeable membrane supporting body which shows a good MD curl when a semipermeable membrane coating solution is applied to the supporting body (nonwoven fabric) and cured, and a method for manufacturing the same. The nonwoven fabric for a semipermeable membrane supporting body according to the present invention is a nonwoven fabric which comprises an organic synthetic fiber as the main component and on one surface of which a semipermeable membrane is to be supported, characterized in that, when the nonwoven fabric to be coated with the semipermeable membrane is separated into two layers along the thickness direction thereof to give a layer on the side of the surface to be coated with the semipermeable membrane and the other layer on the side of the surface not to be coated with the semipermeable membrane, the ratio of the layer on the side of the surface to be coated with the semipermeable membrane is 35-70 mass% inclusive relative to the sum of the layer on the side of the surface to be coated with the semipermeable membrane and the layer on the side of the surface not to be coated with the semipermeable membrane.

Description

technical field [0001] The present invention relates to a kind of non-woven fabric, in detail, it relates to the production of semi-permeable membranes with separation functions such as ultrafiltration membranes, precision filtration membranes, and reverse osmosis (RO) membranes, as a support for membrane production. A nonwoven fabric for a semipermeable membrane support that reinforces a semipermeable membrane and a manufacturing method thereof. Background technique [0002] Semipermeable membranes are widely used in the removal of impurities in beverage / industrial water, desalination of seawater, removal of bacteria in food, wastewater treatment or biochemical fields. [0003] For semi-permeable membranes, cellulose-based resins, polyvinyl alcohol-based resins, polysulfone-based resins, polyamide-based resins, polyimide-based resins, polyacrylonitrile-based resins, and polyester-based resins can be selected according to the application. , Fluorine resins and other polymer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/10B01D71/48D21H13/24
CPCB01D69/10D21H13/24D04H1/435D04H1/55D04H1/64Y10T442/671B01D69/1071B01D69/105B32B5/022B32B27/12D04H1/558B01D2325/40B32B2262/0276B32B2255/02D10B2331/04D10B2505/04B01D69/02B01D71/06
Inventor 楚山智彦根本纯司浜边久嗣
Owner HOKUETSU KK
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