Polytetrafluoroethylene composite micro porous film for air purifying and its producing method

A technology of polytetrafluoroethylene and air purification, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems such as the decrease of filtration efficiency and air flow resistance, and achieve low production cost, reliable performance and excellent manufacturing process simple effect
CN1820831AActive Publication Date: 2006-08-23TONGXIANG JIANMIN FILTER MATERIALS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TONGXIANG JIANMIN FILTER MATERIALS
Publication Date
2006-08-23

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Abstract

The present invention discloses composite microporous polytetrafluoroethylene film for air purification and its production process. The composite microporous polytetrafluoroethylene film is one kind of capillary microporous film comprising microporous polytetrafluoroethylene film to ensure the filtering efficiency and its composited protecting and supporting material. The protecting and supporting material is polymer or inorganic fiber material. The microporous polytetrafluoroethylene film has thickness of 3-20 microns and pore size of 0.050-10.0 microns, the protecting and supporting material has the thickness of 10-3000 microns. The present invention has the features of low cost, easy manufacture and simple technological process, etc.
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Description

technical field

[0001] The invention relates to a polytetrafluoroethylene composite microporous membrane for air purification and a preparation method thereof. Background technique

[0002] Air purification is of great significance in high-tech fields such as biology, pharmacy, chemical industry, electronics, environmental protection, and scientific experiments. Traditional filter media include polypropylene, polyester, and glass fiber, which are manufactured by spunbonding, melt blown, hot pressing, or papermaking. The obtained product is a deep filter medium. During the use of air filtration, the filter Efficiency varies with air flow velocity and with the potential for filter retentate breakthrough.

[0003] Polytetrafluoroethylene microporous membrane is a surface filter medium made of two-way stretching method, and the membrane pores are in the shape of a network. Because of its sharp screening and filtration characteristics, it has been widely u...

Claims

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