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Polytef microporous film for bio-drying and preparation method thereof

A polytetrafluoroethylene and biological drying technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc. Excellent water quality, stable and long-lasting performance, easy to operate

Pending Publication Date: 2019-05-10
HUZHOU SENNUO FLUORINE MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the existing biaxially stretched polytetrafluoroethylene microporous membrane has the function of waterproofing, due to its hydrophilic property and high electrostatic property, the surface is easily polluted with oil, which greatly weakens its air permeability and is not conducive to water. For the emission of steam, although the existing PTFE microporous membrane can block part of the stench, it does not have the function of antibacterial and deodorization, which affects the normal use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: A polytetrafluoroethylene microporous membrane for biological drying, including a base membrane, and the front and back of the base membrane are respectively provided with an oil-repellent coating and a hydrophilic coating.

[0028] The oil-repellent coating is a fluorine-containing acrylate polymer coating.

[0029] The hydrophilic coating is a weak cationic silicone hydrophilic agent coating.

[0030] A method for preparing a polytetrafluoroethylene microporous membrane for biological drying, comprising the following steps:

[0031] A. Using polytetrafluoroethylene dispersion resin with nano-copper ion powder as raw material, the base film is made by two-way stretching;

[0032] B. With any side of the base film in step A as the front, spray the fluorine-containing acrylate polymer treatment liquid, and dry to form an oil-repellent coating;

[0033] C. Spray a weak cationic organic silicon hydrophilic agent treatment solution on the reverse side of the ba...

Embodiment 2

[0047] Embodiment 2: A polytetrafluoroethylene microporous membrane for biological drying, including a base membrane, and the front and back sides of the base membrane are respectively provided with an oil-repellent coating and a hydrophilic coating.

[0048] The oil-repellent coating is a fluorine-containing acrylate polymer coating.

[0049] The hydrophilic coating is a weak cationic silicone hydrophilic agent coating.

[0050] A method for preparing a polytetrafluoroethylene microporous membrane for biological drying, comprising the following steps:

[0051] A. Using polytetrafluoroethylene dispersion resin with nano-copper ion powder as raw material, the base film is made by two-way stretching;

[0052] B. With any side of the base film in step A as the front, spray the fluorine-containing acrylate polymer treatment liquid, and dry to form an oil-repellent coating;

[0053] C. Spray a weak cationic organic silicon hydrophilic agent treatment solution on the reverse side ...

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Abstract

The invention discloses a polytef microporous film for bio-drying and a preparation method thereof. The polytef microporous film comprises a base film, an oil-repellent coating and a hydrophilic coating are arranged on the front and the back of the base film respectively, the oil-repellent coating is a fluorinated acrylate polymer coating, and the hydrophilic coating is a weak cationic organosilicon hydrophilic agent coating. The preparation method includes following steps: A, taking polytef resin added with nano copper ion powder as a raw material, and performing two-way stretching to obtainthe base film; B, taking any face of the base film in the step A as a front, spraying fluorinated acrylate polymer treatment liquid, and drying to form the oil-repellent coating; C, spraying weak cationic organosilicon hydrophilic agent treatment liquid on the back of the base film in the step B, drying to form the hydrophilic coating, and obtaining the polytef microporous film. The polytef microporous film has oil-repellent and hydrophilic two-way heterogenous functions and has good antibacterial, deodorizing and air-permeable performance.

Description

technical field [0001] The invention relates to a polytetrafluoroethylene microporous membrane, in particular to a polytetrafluoroethylene microporous membrane for biological drying and a preparation method thereof. Background technique [0002] With the progress and development of urbanization, the output of sludge and domestic waste is increasing day by day. A large amount of sludge and domestic waste has become a serious social and environmental problem. The treatment of sludge and domestic waste is the resource of sludge and domestic waste. It is an economical, energy-saving and environmental-friendly drying technology, which uses microbial aerobic fermentation to generate heat to evaporate water. The core of the bio-drying membrane for sludge and domestic waste is polytetrafluoroethylene microporous membrane. Because polytetrafluoroethylene has many properties such as high and low temperature resistance, acid and alkali resistance, corrosion resistance and aging resista...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/48B01D69/02B01D67/00C02F11/121
Inventor 俞锦伟张振刚吴辉黄建祥
Owner HUZHOU SENNUO FLUORINE MATERIAL TECH
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