Double-resistant polytetrafluoroethylene microporous membrane and preparation method thereof

A polytetrafluoroethylene and microporous membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc. The effect of enhancing added value and functionality

Inactive Publication Date: 2013-12-11
SHANGHAI LINFLON FILM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The "mucosa" phenomenon is more serious in the airgel state, and the antistatic performance is weakened after the original antistatic filter material is coated, and the harm increases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Select 2kg of F106 polytetrafluoroethylene dispersion resin powder produced by Daikin Corporation of Japan, pass through an 8-mesh sieve, add 40g of double-resistant material (including 30g of inorganic nano-silver and 10g of rare earth doping) and mix well, add extrusion aid solvent Oil 660g.

[0031] 2) Stand at 70°C for 12 hours.

[0032] 3) Put 1 into the billet making machine to make billets, the billet making pressure is 0.5Mpa, keep the pressure for 3 minutes, and then release the pressure slowly.

[0033] 4) Put the billet into the hydraulic press and extrude into strips, the oil pump pressure is 64kgf / cm 2 , the compression ratio is 30.

[0034] 5) After the slivers were left to stand in a water bath at 50°C for 30 minutes, they were calendered on a two-roll calender at 70°C and a speed of 20 m / min to form an oil-containing base tape with a width of 24 cm and a thickness of 20 filaments.

[0035] 6) The oil-containing base tape is stretched longitudinally...

Embodiment 2

[0040] 1) Choose 2kg of F104 polytetrafluoroethylene dispersion resin powder produced by Daikin Corporation of Japan, pass through an 8-mesh sieve, add 30g of double-resistant materials (including 10g of inorganic nano-silver and 20g of rare earth doping) and mix well, add extrusion aid aviation Kerosene 700g.

[0041] 2) Stand at 70°C for 12 hours.

[0042] 3) Put 1 into the billet making machine to make billets, the billet making pressure is 0.35Mpa, keep the pressure for 3 minutes, and then release the pressure slowly.

[0043] 4) Put the billet into the hydraulic press and extrude into strips, the oil pump pressure is 64kgf / cm 2 , the compression ratio is 25.

[0044] 5) After the slivers were left to stand in a water solution at 50°C for 30 minutes, they were rolled into an oil-containing base tape with a width of 26 cm and a thickness of 22 filaments on a two-roll calender at 70°C and a speed of 18 m / min.

[0045] 6) After the oil-containing base tape is removed from ...

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PUM

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Abstract

The invention discloses a double-resistant polytetrafluoroethylene microporous membrane and a preparation method thereof. The double-resistant polytetrafluoroethylene microporous membrane is prepared through the following steps of: proportionally mixing a polytetrafluoroethylene dispersion resin, double-resistant powder and an extrusion auxiliary together to form an oil-containing base band, degreasing the oil-containing base band and longitudinally stretching the oil-containing base band for the first time; treating the stretched band by using a double-resistant oil soluble emulsion; stretching the band bidirectionally to form the double-resistant polytetrafluoroethylene microporous membrane. The double-resistant polytetrafluoroethylene microporous membrane provided by the invention has the advantages of high filter efficiency, antibiosis and anti-staticelectricity, low running resistance, easy ash removal, resistance to high and low temperatures, resistance to acids and bases, and corrosion resistance.

Description

technical field [0001] The invention relates to a microporous membrane and a preparation method thereof, in particular to a double anti-polytetrafluoroethylene microporous membrane and a preparation method thereof. The membrane has antibacterial and antistatic functions. Background technique [0002] Polytetrafluoroethylene microporous membrane-coated filter material has changed the performance of traditional deep filter materials, especially the filtration efficiency of PM2.5 fine particles that are harmful to human body can reach more than 99.99%, with high filtration efficiency and stable running resistance , easy to clean dust, long service life and other advantages. [0003] However, an Achilles' heel when PTFE microporous membrane is used in the field of air purification and dust removal is its excellent electrical insulation. Therefore, the static electricity is large, dust is easy to accumulate, and it is easy to form a hotbed for various bacteria, especially in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/36B01D69/02B01D67/00
Inventor 薛刚张建军郑淑琴
Owner SHANGHAI LINFLON FILM TECH
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