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Double-layer wet spunlace separation membrane support and preparation method thereof

A separation membrane and support technology, which is applied in the field of double-layer wet spunlace separation membrane support and its preparation, can solve the problems of poor force, poor flexibility and low strength of the double-layer separation membrane support, and achieves the realization of strength. and flexibility, reducing resistance and prolonging service life

Active Publication Date: 2019-07-12
FOSHAN S L P SPECIAL MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention overcomes the shortcomings in the prior art, provides a double-layer wet-process spunlace separation membrane support and its preparation method, and solves the problem of poor interlayer force, easy delamination, low strength, For the problem of poor flexibility, without the need for high temperature and hot rolling pressure, it provides a method for preparing a double-layer separation membrane support material with good interlayer bonding force, excellent mechanical properties, and stable morphology and structure.

Method used

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  • Double-layer wet spunlace separation membrane support and preparation method thereof
  • Double-layer wet spunlace separation membrane support and preparation method thereof
  • Double-layer wet spunlace separation membrane support and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] The preparation of the double-layer wet spunlace separation membrane support mainly includes the following steps:

[0035] 1. Blending pulp

[0036] Disperse polyester fiber (fiber diameter 6.3 μm, fiber length 5 mm) and ES fiber (3.2 μm, fiber length 5 mm) in water at a mixing ratio of 60:40, control the fiber concentration to 2%, defrost for 40 minutes, and put it into the slurry Pool, add water and polyacrylamide dispersant and stir evenly to make the concentration 0.03, viscosity 60 seconds, and make coating layer slurry;

[0037] Disperse polyester fibers (fiber diameter 14.5 μm, fiber length 5 mm) and polyethylene fibers (10.2 μm, fiber length 5 mm) in water at a mixing ratio of 60:40, control the fiber concentration to 2%, defecate for 40 min, put into the In the slurry tank, add water and polyacrylamide dispersant and stir evenly, so that the concentration is 0.04, the viscosity is 65 seconds, and it is made into a support layer slurry;

[0038] 2. Web formati...

Embodiment 2

[0043] The preparation of the double-layer wet spunlace separation membrane support mainly includes the following steps:

[0044] 1. Blending pulp

[0045] Polyester fibers (fiber diameter 7.2 μm, fiber length 5 mm) and low-melting polyester fibers (melting point 130 ° C, 4.3 μm, fiber length 5 mm) were dispersed in water at a mixing ratio of 60:40, and the fiber concentration was controlled to be 2%. Decompose for 40 minutes, put it into the slurry mixing tank, add water and polyacrylamide dispersant and stir evenly, so that the concentration is 0.03, the viscosity is 60 seconds, and the coating layer slurry is prepared;

[0046] Disperse polyester fibers (fiber diameter 13.8 μm, fiber length 5 mm) and low-melting polyester fibers (melting point 130 ° C, 12.6 μm, fiber length 5 mm) in water at a mixing ratio of 60:40, and control the fiber concentration to 2%. Decompose for 40 minutes, put it into the slurry mixing tank, add water and polyacrylamide dispersant and stir evenl...

Embodiment 3

[0052] Using the same process conditions and processing methods as in Example 2, the difference is that the pressure of the spunlace main thorn is adjusted to 55bar, and the quantitative 79.6g / m 2 Double layer wet spunlace separation membrane support.

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Abstract

The invention relates to a double-layer wet spunlace separation membrane support and a preparation method thereof. The double-layer wet spunlace separation membrane support comprises a coating layer with the quantity of 20-40 g / m<2> and a support layer with the quantity of 40-80 g / m<2>, wherein the coating layer is prepared from 60%-80% by weight of small-diameter polyester fibers and 20%-40% by weight of low-melting-point polyester fibers or ES fibers; the support layer is prepared from 70%-90% by weight of large-diameter polyester fibers and 10%-30% by weight of low-melting-point polyester fibers or PE fibers, after being treated in process steps of beating and blending, pulp is conveyed by different pulp supply systems to double-layer forming wet equipment for web making, and then spunlacing and hot-rolling calendering forming are performed. The problems of poor interlayer action force, high layering probability, low strength and poor flexibility of a double-layer separation membrane support are solved, and a double-layer separation membrane support material with good interlayer bonding force, excellent mechanical property, stable morphological structure and moderate flexibility is prepared under lower hot rolling pressure and at the lower temperature.

Description

technical field [0001] The invention relates to the technical field of manufacturing materials for liquid separation and filtration, in particular to a double-layer wet-process spunlace separation membrane support and a preparation method thereof. Background technique [0002] As a new separation technology, membrane technology has been widely used in gas separation, material separation and water treatment, among which membrane products have the largest demand and the most widely used in the field of water treatment. Microfiltration membranes and ultrafiltration membranes are used in water treatment in water purification plants, and reverse osmosis membranes are mainly used in desalination of seawater. In addition, reverse osmosis membranes and nanofiltration membranes are used for the treatment of semiconductor manufacturing water, water heater water, medical water, and pure water for testing. At the same time, in underground wastewater treatment, microfiltration membranes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/10B01D69/12
CPCB01D69/10B01D69/12
Inventor 于斌郭玉海李杰申景山何忠朱海霖
Owner FOSHAN S L P SPECIAL MATERIALS