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Three-layer composite separation membrane support material

A supporting material and separation membrane technology, which is applied in the direction of textiles, papermaking, non-woven fabrics, etc., can solve the problems of easy leakage of glue through the bottom, low strength of separation membrane support body, and poor interlayer force, so as to solve the problems of easy leakage, Effects of improving physical and mechanical properties and structural stability, and good adhesion

Active Publication Date: 2019-01-11
FOSHAN S L P SPECIAL MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention overcomes the shortcomings in the prior art, provides a three-layer composite separation membrane support material and its preparation method, solves the problems of low strength of the separation membrane support body, poor interlayer force, and easy leakage of glue through the bottom. Excellent performance, good interlayer bonding, easy coating without glue leakage, stable shape and structure

Method used

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  • Three-layer composite separation membrane support material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation of the three-layer wet spunlace separation membrane support mainly includes the following steps:

[0033] 1. Wet process and spinning

[0034] 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%, the viscosity is 60 seconds, make the upper layer (coating layer) slurry, and pass through the wet forming machine to obtain a dry weight of 20g / m 2 upper fiber web;

[0035]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 ...

Embodiment 2

[0042] The preparation of the three-layer wet spunlace separation membrane support mainly includes the following steps:

[0043] 1. Wet Laying and Spunlaid

[0044] 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, stir evenly, make the concentration 0.03%, and the viscosity is 60 seconds, make the upper layer (coating layer) slurry, and pass through the wet forming machine to obtain a dry weight of 20g / m 2 upper fiber web;

[0045] 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...

Embodiment 3

[0052] Using the same process conditions and processing methods as in Example 2, the different three-layer composite fiber webs were directly dried without spunlace, hot-rolled and calendered to obtain a quantitative 65.0g / m 2 The three-layer wet spunlace separation membrane support.

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Abstract

The invention discloses a three-layer composite separation membrane support material and a preparation method of the support material. The separation membrane support material comprises a three-layer structure, wherein an upper layer (a coating layer) and a lower layer are wet-laid and chopped fiber layers comprising polyester fibers and low melting point polyester fibers; an intermediate layer is a filament fiber layer comprising polyester filaments and the low melting point polyester fibers. The production method of preparing the composite separation membrane support material comprises the steps of beating, dispersion, dehydration web formation, spinning web formation, spunlaced reinforcement of upper layer, intermediate layer and lower layer fiber webs, hot rolling and calendering forming or direct hot rolling and calendering forming. The separation membrane support body has excellent surface smoothness, is easy to coat and adhere, good in structural stability and low in permeation possibility of a semipermeable membrane coating solution, and can be widely applied in the fields of seawater desalination, food concentration, waste water treatment, blood filtration and the like as the separation membrane support material.

Description

technical field [0001] The invention relates to a separation membrane support material, in particular to a three-layer composite separation membrane support material and a preparation method thereof. Background technique [0002] Membrane technology is also called membrane separation technology. As a new separation technology, membrane technology has performed well in various fields of production and life, and has been widely used in gas separation, material separation and water treatment. Membrane products have the greatest demand. In the field of water treatment, for the application of industrial wastewater, medical wastewater, crude oil wastewater and domestic sewage, membrane technology not only has a treatment efficiency and quality that are far greater than traditional wastewater treatment processes, but is also widely used in microelectronics, boiler feed water, and circulating water. and other fields, and the earth facilitates human production and life. [0003] Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/4382D04H1/4374D04H1/435D04H1/4291D04H1/492D04H1/541
CPCD04H1/4291D04H1/435D04H1/4374D04H1/4382D04H1/492D04H1/541
Inventor 李杰于斌郭玉海何忠周思远朱海霖
Owner FOSHAN S L P SPECIAL MATERIALS
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