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Preparation method of waterproof and moisture permeable fabric membrane, waterproof and moisture permeable fabric and preparation method of membrane

A waterproof and moisture-permeable film, waterproof and moisture-permeable technology, applied in chemical instruments and methods, non-woven fabrics, textiles and papermaking, etc., can solve the problems of expensive products, difficult processing, complicated processes, etc., and achieve low cost and high production efficiency. The effect of high efficiency and simple process flow

Active Publication Date: 2013-12-11
ZHEJIANG WEIXING IND DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the waterproof and moisture-permeable fabric represented by the PTFE porous membrane disclosed in the prior art has good waterproof and moisture-permeable performance, it requires special biaxial stretching equipment for its preparation, the process is complicated, the product processing is difficult, and the cost is high. The product is expensive, which largely limits its promotion and application

Method used

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  • Preparation method of waterproof and moisture permeable fabric membrane, waterproof and moisture permeable fabric and preparation method of membrane
  • Preparation method of waterproof and moisture permeable fabric membrane, waterproof and moisture permeable fabric and preparation method of membrane
  • Preparation method of waterproof and moisture permeable fabric membrane, waterproof and moisture permeable fabric and preparation method of membrane

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preparation example Construction

[0044] The invention provides a method for preparing a waterproof and moisture-permeable membrane, comprising the following steps:

[0045] Dissolving the hydrophobic polymer in the first spinning solvent to obtain a hydrophobic spinning solution;

[0046] Carrying out the first electrospinning of the hydrophobic spinning solution to obtain a single-layer waterproof and moisture-permeable membrane;

[0047] or

[0048] Dissolving the hydrophilic polymer in the second spinning solvent to obtain a hydrophilic spinning solution;

[0049] Carrying out the second electrospinning of the hydrophilic spinning solution to obtain a hydrophilic nanofiber membrane;

[0050] The single-layer waterproof and moisture-permeable membrane is combined with the hydrophilic nanofiber membrane to obtain a double-layer waterproof and moisture-permeable membrane.

[0051] In the invention, the polymer solution is electrostatically spun to obtain a waterproof and moisture-permeable membrane. The m...

Embodiment 1

[0095] Dissolve the polyvinylidene fluoride polymer in N,N-dimethylacetamide, stir the obtained first polymer solution in a constant temperature water bath at 55°C for 3 hours, and prepare the second polymer solution with a mass fraction of 20wt%. a spinning solution;

[0096] Dissolve polyimide in N,N-dimethylacetamide, stir the obtained second polymer solution in a constant temperature water bath at 55°C for 3 hours, and prepare the second spinning with a mass fraction of 20wt%. liquid;

[0097] The obtained first spinning solution and the second spinning solution are subjected to electrospinning, the spinning voltage is set to 30kV, the receiving distance is 15cm, and the spinning time is 1h, and the obtained first fiber and the second fiber are spun to obtain Single-layer waterproof and moisture-permeable membrane;

[0098] The average diameter of the fiber detected by the present invention is 326nm, the coefficient of variation CV is 6.73%, and the thickness of the fibe...

Embodiment 2

[0109] Dissolve the polyvinylidene fluoride polymer in N,N-dimethylacetamide, stir the obtained first polymer solution in a constant temperature water bath at 55°C for 4 hours, and prepare the first polymer solution with a mass fraction of 25wt%. a spinning solution;

[0110] Dissolve polytetrafluoroethylene in N,N-dimethylacetamide, stir the obtained second polymer solution in a constant temperature water bath at 55°C for 4 hours, and prepare a second spinning solution with a mass fraction of 25wt%. liquid;

[0111] The obtained first spinning solution and the second spinning solution are electrospun, the setting spinning voltage is 30kV, the receiving distance is 18cm, and the spinning time is 2 hours, and the obtained first fiber and the second fiber are spun A single-layer waterproof and moisture-permeable membrane is obtained;

[0112] The average diameter of the fiber detected by the present invention is 460nm, the coefficient of variation CV and 5.25%, and the thickne...

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Abstract

The invention provides a preparation method of a waterproof and moisture permeable membrane. The preparation method comprises the following steps: dissolving a hydrophobic polymer in a first spinning solvent to obtain a hydrophobic spinning liquid; carrying out first electrostatic spinning on the hydrophobic spinning liquid to obtain a monolayer waterproof and moisture permeable membrane; or dissolving a hydrophilic polymer in a second spinning solvent to obtain a hydrophilic spinning liquid; carrying out second electrostatic spinning on the hydrophilic spinning liquid to obtain a hydrophilic nanofiber membrane; and compositing the monolayer waterproof and moisture permeable membrane and the hydrophilic nanofiber membrane to obtain the double-layered waterproof and moisture permeable membrane. The method provided by the invention is simple in process flow, low in energy consumption and high in production efficiency, and is suitable for industrial production. The waterproof and moisture permeable membrane obtained by the method provided by the invention has extremely high porosity and a small gap size, and gaps are zigzag holes rather than through holes, thus facilitating pass of water vapor molecules but blocking pass of water drops. Therefore, the waterproof and moisture permeable fabric has high hydrostatic pressure resistance, ventilation, moisture permeability and mechanical strength.

Description

[0001] This application claims the priority of a Chinese patent application filed with the China Patent Office on August 16, 2013, with application number 201310360567.5, and the title of the invention is "Waterproof and moisture-permeable fabric and its preparation method", the entire content of which is incorporated by reference in this application middle. technical field [0002] The invention relates to the technical field of textiles, in particular to a waterproof and moisture-permeable fabric and a preparation method thereof. Background technique [0003] Waterproof & Moisture Permeable Fabric is generally called Waterproof but Breathable Fabric abroad. The so-called waterproof and moisture-permeable performance of the fabric means that the fabric will not be permeated by water under the action of a certain pressure of water, but the sweat vapor emitted by the human body can diffuse or transfer to the outside through the fabric, without accumulating condensation betwee...

Claims

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Application Information

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IPC IPC(8): D04H1/728D04H1/4374B32B5/26B32B37/02B32B38/18
Inventor 刘延波马营陈国贵宋学礼
Owner ZHEJIANG WEIXING IND DEV
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