Wet-process non-woven fabric for water treatment reverse osmosis membrane support body base material and preparation method of wet-process non-woven fabric

A reverse osmosis membrane and wet-laid non-woven technology, which is applied in the field of wet-laid non-woven fabrics for water treatment reverse osmosis membrane support substrates and its preparation, can solve the problems of complex preparation process, difficult control, and cost reduction. To achieve the effect of simple and reasonable preparation process, improved retention rate and good uniformity

Active Publication Date: 2021-04-16
宁波日新恒力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the manufacture of multi-layer non-woven fabrics with different longitudinal and transverse tensile strengths requires multiple inclined wire paper machines with different production processes, which is costly, complicated in pr

Method used

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  • Wet-process non-woven fabric for water treatment reverse osmosis membrane support body base material and preparation method of wet-process non-woven fabric
  • Wet-process non-woven fabric for water treatment reverse osmosis membrane support body base material and preparation method of wet-process non-woven fabric
  • Wet-process non-woven fabric for water treatment reverse osmosis membrane support body base material and preparation method of wet-process non-woven fabric

Examples

Experimental program
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preparation example Construction

[0056] The present invention also provides a method for preparing the above-mentioned wet-laid non-woven fabric used for water treatment reverse osmosis membrane support base material, comprising the following steps:

[0057] a) Dispersion pretreatment of raw fiber: Put the raw fiber into the fiber disperser equipped with water, continue to add water to the specified liquid level, and disperse the slurry to the fiber dispersion state; pump the fiber slurry prepared in the fiber disperser to In the slurry storage tank, turn on the agitator of the slurry storage tank, and add a dispersant, dilute and disperse the fiber slurry to a state where the fiber is single and suspended in water, and the fiber slurry is obtained;

[0058] The main fibers and hot-melt bonding fibers that make up this non-woven fabric, due to their hydrophobic properties, are not easy to maintain in the dispersed state in water, and are prone to flocculation, and the fibers are easy to intertwine and entangle...

Embodiment 1

[0076] A wet-laid non-woven fabric used for water treatment reverse osmosis membrane support base materials, the raw material fibers include main fibers and hot-melt bonding fibers; the material of the main fibers is PET; the hot-melt bonding fibers include a surface layer and an inner core The material of the surface layer is modified COPET, and the material of the inner core is PET; the weight ratio of the main fiber is 60% of the total weight, and the weight ratio of the hot-melt bonding fiber is 40% of the total weight;

[0077] The diameter of the main fiber is 1.0dtex, and the fiber length is 6mm; the diameter of the hot-melt bonding fiber is 1.1dtex, and the fiber length is 6mm; the ratio of the surface layer of COPET fibers with a melting point of 110°C to 180°C is 3:7, The melting point temperature of the inner core is 250°C; the melting point temperature of the main fiber is 250°C; the moisture absorption rate of the raw material fiber is 0.4%, and the heat shrinkage ...

Embodiment 2

[0088] The difference from Example 1 is that based on Example 1, the difference is that the surface layer COPET fiber with a melting point of 110°C and a fiber with a melting point of 180°C is 2:8, and the final surface density is 76g / cm 2 base non-woven fabric.

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Abstract

The invention discloses a wet non-woven fabric for a water treatment reverse osmosis membrane supporting body base material and a preparation method, main body fibers and hot melting bonding fibers are used as raw material fibers, and the main body fibers are made of PET; the hot-melt adhesive fiber comprises a surface layer and an inner core, the surface layer is made of modified COPET, and the inner core is made of PET. A wet non-woven fabric process is adopted, the base material non-woven fabric is formed into a whole through fiber dispersion, inclined wire papermaking forming, drying cylinder drying and off-line machine external hot melting rolling, the whole base material non-woven fabric is of a single-layer structure, and the prepared base material non-woven fabric needs to have good surface coating performance and good coating liquid permeability and cannot permeate to the non-coating surface of the base material non-woven fabric. According to the invention, by adopting a distributed control system, the method has the characteristics of good product quality controllability, stable performances of the finished product, simple and reasonable operation of the preparation process flow, easiness in operation, energy conservation and consumption reduction, and can meet the requirements of reverse osmosis membrane production.

Description

technical field [0001] The invention belongs to the field of wet-laid non-woven fabrics for support base materials, and in particular relates to a wet-laid non-woven fabric used for water treatment reverse osmosis membrane support base materials and a preparation method thereof. Background technique [0002] In recent years, with the progress of society and the development of economy, the demand for pure water in various fields has continued to grow, and reverse osmosis membrane technology has developed rapidly. In the steel industry, petrochemical industry, power industry, medicine, food, drinking water, municipal engineering , Sewage reuse and seawater desalination and other fields have been widely used, and the demand for reverse osmosis products is increasing rapidly. [0003] The state and relevant government departments attach great importance to water pollution and water safety, which has brought unprecedented opportunities for the development of reverse osmosis membr...

Claims

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Application Information

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IPC IPC(8): D21H27/08D21H13/24D21H15/02D21H21/08D21H17/37D21H17/53
CPCY02A20/131
Inventor 不公告发明人
Owner 宁波日新恒力科技有限公司
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