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Wet-process substrate non-woven fabric used for reverse osmosis membrane and preparation method thereof

A technology of reverse osmosis membrane and non-woven fabric is applied in the field of preparation of the base non-woven fabric, and can solve the problems of inability to meet the use requirements of reverse osmosis membrane, insufficient structure and the like

Active Publication Date: 2015-11-11
CHANGZHOU KANGJIE SPECIAL NON WOVEN FABRICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the structural and functional defects of the three patented technologies, they cannot meet the requirements for the use of the reverse osmosis membrane

Method used

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  • Wet-process substrate non-woven fabric used for reverse osmosis membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Example 1, see attached figure 1

[0070] A non-woven base material used for wet sheeting of reverse osmosis membranes, which is made of synthetic fibers after wet sheeting and hot-melt rolling, and its:

[0071] a, the substrate non-woven fabric has a single-layer structure as a whole;

[0072] b, the substrate non-woven fabric with a single-layer structure as a whole, which is composed of synthetic fibers of different raw materials in the upper, middle and lower layers;

[0073] And its upper layer is a low-melting point hot-melt ES composite fiber 1, and the ES composite fiber is a concentric circular fiber composed of surface layer PE polyethylene and inner core PP polypropylene;

[0074] And its lower layer is low-melting-point hot-melt COPET / PET polyester composite fiber 2, and the COPET / PET polyester composite fiber is a concentric circular fiber composed of surface-modified COPET low-melting-point polyester and inner core PET polyester;

[0075] And the middl...

Embodiment 2

[0082] Example 2: See attached figure 1 :

[0083] A method for preparing the above-mentioned substrate non-woven fabric, using synthetic fibers meeting the technical requirements claimed in Example 1 as a raw material, and using a wet papermaking machine as a process equipment, the preparation steps include:

[0084]a. Hydrophilic pretreatment of raw fiber: first use tap water and high-efficiency hydrophilic penetrating agent to mix and prepare circulating water for hydrophilic papermaking at a weight ratio of 1000:4. The raw material fibers were weighed according to the following proportions by weight: 10.5 kg of ES fibers (20 μm in diameter and 4 mm in length). Accounting for 35%; COPET / PET fiber (diameter 15μm, length 4mm) 10.5kg, accounting for 35%; PET ultrafine fiber (diameter 5μm, length 2.5mm) 9kg, accounting for 30%. Put the weighed raw fiber into a beater, add water, mix and beat. The weight ratio of water and fiber in the beater cylinder is 12:1. Put the beaten...

Embodiment 3

[0091] Embodiment 3: A kind of preparation method of described substrate nonwoven fabric is carried out according to the following steps

[0092] In step a, tap water and high-efficiency hydrophilic penetrating agent are mixed at a weight ratio of 1000:4 to make hydrophilic circulating water. Weigh the raw material fibers according to the following proportions: ES fiber (diameter 18μm, length 3mm) 9.1kg, accounting for 33%; COPET / PET fiber (diameter 12μm, length 4mm) 9.6kg, accounting for 35%; PET ultrafine fiber (diameter 5μm, length 3mm) ) 8.8kg, accounting for 32%. Hydrophilic papermaking circulating water and total fiber weight ratio is 1000:1.1. Put the weighed fiber into the beater for mixing and beating. The weight ratio of water and fiber in the tank of the beater is 12:1. Put the fiber slurry after beating and mixing into the hydrophilic papermaking circulating water in the slurry storage tank, turn on the mixer to dilute and disperse until the fiber is in a single ...

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Abstract

The invention discloses wet-process substrate non-woven fabric used for a reverse osmosis membrane and a preparation method thereof. The manufactured substrate non-woven fabric is formed by integrating three layers of fibers through hot-melting rolling compaction, wherein the upper layer comprises ES composite fibers, the lower layer comprises COPET / PET dacron composite fibers, and the intermediate layer comprises synthetic fibers composed of PET fibers, ES fibers and COPET / PET composite fibers. The fabric is mainly characterized in that the entire fabric is of a single-layer structure. The preparation method of the fabric comprises the steps of hydrophilic treatment of the fibers serving as raw materials, processing and netting, drying treatment, first hot melting rolling compaction, cooling shrinkage treatment, second hot melting rolling compaction and quality inspection and rolling-up, and the preparation method is mainly characterized in that the seven steps are conducted in a continuous and synchronized mode. The wet-process substrate non-woven fabric used for the reverse osmosis membrane and the preparation method thereof have the advantages that the manufactured product quality is good, the preparation method and process are advanced and reasonable, energy is saved, consumption is reduced, and the process cost is low.

Description

technical field [0001] The invention relates to a non-woven fabric produced by a wet method, which is a base material for coating a reverse osmosis membrane, and a preparation method of the base material non-woven fabric. The invention belongs to the technical field of wet-laid non-woven fabrics. Background technique [0002] With the rapid development of industrial and agricultural production and the rapid advancement of urbanization, water pollution is increasing day by day. Thereby promoting the rapid development of water treatment technology. [0003] Among the existing water treatment technologies, many of them use membrane technology for water treatment. For example, reverse osmosis membrane technology is used for seawater desalination treatment and direct drinking water treatment, household drinking water treatment, cleaning water for semiconductor industry, water for food industry, water for medical industry, etc. [0004] The important factor that restricts the w...

Claims

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Application Information

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IPC IPC(8): D04H1/4382D04H1/541
Inventor 孔德康
Owner CHANGZHOU KANGJIE SPECIAL NON WOVEN FABRICS CO LTD
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