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Waterproof and breathable film and preparation method thereof

A waterproof breathable membrane, hydrophobic membrane technology, applied in chemical instruments and methods, synthetic resin layered products, textiles and papermaking, etc., can solve the problems of large ventilation gaps, micropores are easily blocked, and waterproof function is reduced. Small fiber voids and good hydrophobicity

Active Publication Date: 2013-09-11
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In real life, there are many fields that require impermeable materials, so there are many kinds of impermeable materials, but most impermeable materials do not have the effect of ventilation, which limits their application
There are very few waterproof and breathable technologies that have been used. Generally speaking, the air gap left by natural manufacturing is too large, which greatly reduces its waterproof function. Another method is mostly hot-pressed drilling. The drilled microholes are easy to be blocked, and the process of this method is relatively cumbersome

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Stir and mix 0.4 parts of the hydrophilic polymer polyacrylonitrile (PAN) and 9.6 parts of dimethylformamide (DMF) at room temperature to obtain 10 parts of a 4% hydrophilic polymer solution;

[0032] 2) 7.8 parts of hydrophobic polymer, chloroform (CHCl 3 ) 57.2 parts were stirred and mixed evenly at room temperature to obtain 65 parts of a solution of 12% hydrophobic polymer;

[0033] 3) Put 100 parts of the hydrophobic polymer PHBV solution prepared in step (2) into the propulsion pump of the electrospinning machine, set the propulsion speed at 15 μl / min, and spray the charged solution to the bottom under the action of 30KV high voltage On the 30cm aluminum foil receiver, after obtaining a layer of hydrophobic film, put 100 parts of the hydrophilic polymer PAN solution prepared in step (1) into the propulsion pump, the propulsion speed is set to 25μl / min, under the action of high pressure 20KV , spray the charged solution onto the hydrophobic membrane obtained 20...

Embodiment 2

[0036] 1) Stir and mix 4 g of the hydrophilic polymer cellulose acetate and 96 parts of acetone at room temperature to obtain 100 parts of a 4% hydrophilic polymer solution;

[0037] 2) 120 parts of hydrophobic polymer polystyrene, chloroform (CHCl 3 ) 880 parts were stirred and mixed evenly at room temperature to obtain 1000 parts of a solution of 12% hydrophobic polymer;

[0038] 3) Put 1000 parts of the hydrophobic polymer polystyrene solution prepared in step (2) into the propulsion pump of the electrospinning machine, set the propulsion speed at 40 μl / min, and spray the charged solution under the action of 25KV high voltage On the 25cm aluminum foil receiver below, after obtaining a layer of hydrophobic film, then put 100 parts of hydrophilic polymer cellulose acetate solution prepared in step (1) into the propulsion pump, and the propulsion speed was set at 30 μl / min. Under the action of high voltage 5KV, spray the charged solution onto the hydrophobic membrane obtained...

Embodiment 3

[0041] 1) Stir and mix 12 parts of the hydrophilic polymer polyamide and 88 parts of acetone at room temperature to obtain 100 parts of a 12% hydrophilic polymer solution;

[0042] 2) 80 parts of hydrophobic polymer PHBV, chloroform (CHCl 3 ) 920 parts were stirred and mixed evenly at room temperature to obtain 1000 parts of a solution of 8% hydrophobic polymer;

[0043] 3) Put the hydrophobic polymer polystyrene solution into the propulsion pump of the electrospinning machine, set the propulsion speed at 50 μl / min, and under the action of 10KV high voltage, spray the charged solution onto the 10cm aluminum foil receiver below to obtain After a layer of hydrophobic film, put the hydrophilic polymer cellulose acetate solution into the propulsion pump, set the propulsion speed at 15μl / min, and under the action of high voltage 15KV, spray the charged solution to the hydrophobic film obtained by 15cm below, Obtain a complete waterproof and breathable membrane;

[0044] The fiber...

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PUM

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Abstract

The invention belongs to the technical field of high polymer materials, and relates to a waterproof and breathable film and a preparation method thereof. The waterproof and breathable film comprises a hydrophilic film and a hydrophobic film. The prepared waterproof and breathable film comprises two layers of non-woven fabrics, wherein one layer is the hydrophilic film, the other layer is the hydrophobic film, the hydrophilic film layer can keep water on the hydrophilic film layer for a period, rather than, the water rapidly flows to the hydrophobic film layer, so that wetting is realized, and the hydrophobic effect is better. The obtained film has waterproof and breathable performance and can be applied to fields such as clothes, sports shoes and the like, which have requirements for ventilation, perspiration and water drainage; and simultaneously, fiber gaps of a filter film prepared with an electrostatic spinning method are small, and the film has better advantages in the waterproof function.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a waterproof breathable membrane and a preparation method thereof. Background technique [0002] In real life, there are many fields that require anti-permeation materials, so there are many kinds of anti-permeation materials, but most of the anti-permeation materials do not have the effect of ventilation, which limits their application. There are very few existing waterproof and breathable technologies that have been used. Generally speaking, the air gap left by natural manufacturing is too large, which greatly reduces its waterproof function. The other method is mostly hot-pressed drilling. The punched micropores are easily blocked, and the process of this method is relatively cumbersome. [0003] In the present invention, a hydrophilic layer is added on the basis of the hydrophobic film, which can keep water in the hydrophilic layer for a period of time instead of inf...

Claims

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Application Information

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IPC IPC(8): D04H1/4382D04H1/4374B32B27/08B32B27/12
Inventor 余松林
Owner HEFEI GENIUS NEW MATERIALS
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