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Non-woven fabric for semi-permeable membrane support

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

Active Publication Date: 2016-02-10
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

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  • Non-woven fabric for semi-permeable membrane support

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0068]

[0069] 19.5 kg of commercially available polyester main fiber (trade name: EP133, manufactured by KURARAY Co., Ltd., melting point 260°C) with a thickness of 1.45 decitex and a cut length of 5 mm, and 9.0 kg of commercially available polyester fiber with a thickness of 1.2 decitex and a cut length of 5 mm Polyester binder fiber (trade name: TR07N, manufactured by Teijin Textile Co., Ltd., melting point 230°C) and 1.5 kg of unknocked broadleaf bleached kraft pulp (LBKP) were put into water, and dispersed with a disperser for 5 minutes to obtain a fiber concentration of 1 mass % of fiber raw material pulp.

[0070]

[0071] Water was added to the fiber raw material slurry to adjust the fiber concentration to 0.03% by mass, and the fiber slurry was put into the head box of the short-wire paper machine. The cylinder is dried to obtain a width of 1000mm and a weight of 70g / m2 per square meter 2 The continuous winding base paper.

[0072]

[0073] Using a hot calend...

Embodiment 2）

[0075] In the preparation of the fiber stock slurry of Example 1, except that the polyester main fiber was set at 18.0 kg, the polyester binder fiber was set at 9.0 kg, and the unknocked LBKP was set at 3.0 kg, the same method as in Example 1 was obtained. Non-woven fabric for semi-permeable membrane support.

Embodiment 3）

[0077] In the preparation of the fiber raw material slurry in Example 1, except that the polyester main fiber was set at 15.0 kg, the polyester binder fiber was set at 9.0 kg, and the unknocked LBKP was set at 6.0 kg, the same method as in Example 1 was obtained. Non-woven fabric for semi-permeable membrane support.

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PUM

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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 particular, in the manufacture of ultrafiltration membranes, precision filtration membranes, reverse osmosis (RO) membranes, etc. Nonwoven fabric for semipermeable membrane support for the purpose of semipermeable membrane. Background technique [0002] Semipermeable membranes are widely used in the removal of impurities in beverage / industrial water, in the desalination of seawater, in the removal of miscellaneous bacteria in food, in wastewater treatment, in biochemical fields, and the like. [0003] 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 usage. However, the physical strength of the semipermeable membrane itself (hereinafter sometimes simply referred to as "strength") is weak, and cannot withstand high pressures of 1 to 10 MPa or ...

Claims

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Application Information

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