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Non-woven fabric for semipermeable membrane support

A technology of non-woven fabrics and semi-permeable membranes, applied in the field of non-woven fabrics for semi-permeable membrane supports, to achieve the effect of inhibiting thermal shrinkage

Active Publication Date: 2014-08-06
HOKUETSU KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the physical strength of the semi-permeable membrane itself (hereinafter sometimes simply referred to as "strength") is weak, and cannot withstand high pressures of 1 to 10 MPa or more when used alone for ultrafiltration, reverse osmosis, etc.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0068]

[0069] A commercially available polyester fiber (trade name: EP133, manufactured by KURARAY, melting point 260°C) with a thickness of 1.45 dtex and a cut length of 5 mm, 19.5 kg of a commercially available polyester fiber with a thickness of 1.2 dtex and a cut length of 5 mm Polyester binder fiber (trade name: TR07N, manufactured by Teijin Fiber Co., Ltd., melting point 230°C) and 1.5 kg of unknocked hardwood bleached kraft pulp (LBKP) are poured into water and dispersed by a disperser for 5 minutes to obtain a fiber concentration of 1 mass % Of fiber raw material pulp.

[0070]

[0071] Add water to the fiber raw material pulp to adjust the fiber concentration to 0.03% by mass. Put the fiber pulp into the headbox of the short wire paper machine. After the fiber pulp is made into paper, it is dried with a Yankee at a surface temperature of 120°C. The cylinder is dried to obtain a width of 1000mm and a weight of 70g / m per square meter 2 The continuous reeling of the base ...

Embodiment 2）

[0075] In the preparation of the fiber raw material slurry of Example 1, it was obtained in the same manner as in Example 1, except that the polyester main fiber was set to 18.0 kg, the polyester binder fiber was set to 9.0 kg, and the unknocked LBKP was set to 3.0 kg. Non-woven fabric for semipermeable membrane support.

Embodiment 3）

[0077] In the preparation of the fiber raw material slurry of Example 1, it was obtained in the same manner as in Example 1, except that the polyester main fiber was set to 15.0 kg, the polyester binder fiber was set to 9.0 kg, and the non-knocked LBKP was set to 6.0 kg. Non-woven fabric for semipermeable membrane support.

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Abstract

A purpose of the present invention is to provide a non-woven fabric for a semipermeable membrane support, which meets wet strength required by the non-woven fabric for the semipermeable membrane support, suppresses thermal contraction during hot press processing, and has uniform thickness and permeability. The non-woven fabric for the semipermeable membrane support provided by an embodiment is a non-woven fabric with pulp fibers having cellulose component as a main body and organic synthetic fibers as the main fibers. One side surface of the non-woven fabric supports the semipermeable membrane. The content of the pulp fibers having cellulose component as the main body is 5-40% by mass of a total mass of the non-woven fabric.

Description

Technical field [0001] The present invention relates to non-woven fabrics. In detail, it relates to the production of semipermeable membranes with separation functions such as ultrafiltration membranes, precision filtration membranes, reverse osmosis (RO) membranes, etc., as a support for membrane production to strengthen The semi-permeable membrane is a non-woven fabric for semi-permeable membrane support. 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, drainage treatment, and biochemical fields. [0003] In the semipermeable membrane, cellulose resin, polyvinyl alcohol resin, polysulfone resin, polyamide resin, polyimide resin, polyacrylonitrile resin, polyester resin, fluorine resin, etc. Various polymers are selected according to their use. However, the physical strength of the semipermeable membrane itself (hereinafter, sometimes simply refe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/10
Inventor 根本纯司楚山智彦浜边久嗣
Owner HOKUETSU KK
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