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Filter material of tefloncomposite membrane

A polytetrafluoroethylene and filter material technology, applied in the field of filter materials, can solve problems such as blockage of filter material pores, and achieve the effects of large flow, improved filtration efficiency, and improved hydrophobicity

Active Publication Date: 2005-01-19
SHANGHAI FILTER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention overcomes the defect that the original composite welding material is easy to cause blockage of the filter material pores, and provides a filter material of polytetrafluoroethylene (PTFE) composite membrane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: take polysulfone as macromolecule compound, metal salt KI as pore-forming agent, and dimethylacetamide as solution, and prepare adhesive, content (percentage by weight) as follows:

[0013] Polysulfone 5%, metal salt KI 10%, dimethylacetamide 85%;

[0014] Filtration efficiency (%)

[0015] Example

[0016]

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PUM

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Abstract

The invention relates to polytetrafluoroethylene (PTFE) composite film filtering materials for air filtering industry. The polytetrafluoroethylene composite film filtering materials comprise the following components: fiberglass as basement film; polytetrafluoroethylene as surface film; and adhesive agent which is one of polysulfone, nylon 66 and polyvinylidene fluoride fibre for binding the fiberglass and polytetrafluoroethylene; pore-forming material which is one of metal salt KI and NH#-[4]Cl; solvent which is one of dimethyl acetamide, dimethyl formamide and N-methyl pyrrolidone. The content (by weight) of macromolecular compound and pore-forming material is: 5% to 30% of macromolecular compound, 5% to 15% of pore-forming material. The fiberglass and polytetrafluoroethylene composite materials can improve filtration efficiency and have improved hydrophobicity, high-temperature resistance and corrosion resistance.

Description

technical field [0001] The invention relates to a filter material of a polytetrafluoroethylene (PTFE) composite membrane used in the air filter industry. Background technique [0002] At present, the filter materials used in filter elements in the air filter industry can generally be divided into two types: inorganic media and organic media. The inorganic media is mainly glass fiber, but it has the disadvantages of low strength and poor brittleness; Tetrafluoroethylene is the main material, but it has defects such as small flux and uneven pore size distribution. However, the two media have advantages in terms of performance, and it has become the goal of people to make better use of their respective performance advantages and bridge the shortcomings of each other. Chinese patent CN2110571U discloses a high-strength polytetrafluoroethylene (PTFE) welded composite cloth, mainly adding a layer of composite welded layer on the surface layer of polytetrafluoroethylene, in which ...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D71/36B32B17/10B32B27/12
Inventor 刘旭红
Owner SHANGHAI FILTER
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