CN107376671A - Filtering material based on poly tetrafluoroethylene and its preparation method and application - Google Patents

Filtering material based on poly tetrafluoroethylene and its preparation method and application Download PDF

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Publication number
CN107376671A
CN107376671A CN201710728201.7A CN201710728201A CN107376671A CN 107376671 A CN107376671 A CN 107376671A CN 201710728201 A CN201710728201 A CN 201710728201A CN 107376671 A CN107376671 A CN 107376671A
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CN
China
Prior art keywords
filtering
poly tetrafluoroethylene
tetrafluoroethylene
poly
application
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710728201.7A
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Chinese (zh)
Inventor
谢东明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Best Film Global Trading Co Ltd
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Beijing Best Film Global Trading Co Ltd
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Filing date
Publication date
Application filed by Beijing Best Film Global Trading Co Ltd filed Critical Beijing Best Film Global Trading Co Ltd
Priority to CN201710728201.7A priority Critical patent/CN107376671A/en
Publication of CN107376671A publication Critical patent/CN107376671A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters, i.e. particle separators or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/54Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
    • B01D46/543Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D69/00Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/02Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D71/00Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06Organic material
    • B01D71/30Polyalkenyl halides
    • B01D71/32Polyalkenyl halides containing fluorine atoms
    • B01D71/36Polytetrafluoroethene
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2325/00Details relating to properties of membranes
    • B01D2325/02Details relating to pores or pososity of the membranes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2325/00Details relating to properties of membranes
    • B01D2325/22Thermal or heat-resistance properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2325/00Details relating to properties of membranes
    • B01D2325/30Chemical resistance

Abstract

The present invention relates to a kind of filtering material based on poly tetrafluoroethylene and its preparation method and application, methods described comprises the following steps:By PUR heating and melting to 75 DEG C~95 DEG C;Terylene needling material and poly tetrafluoroethylene are bonded with above-mentioned product;Above-mentioned product is subjected to curing process at room temperature, obtains the filtering material based on poly tetrafluoroethylene.The filtering material based on poly tetrafluoroethylene of the present invention, using polytetrafluoroethylene (PTFE) as raw material, poly tetrafluoroethylene surface is covered with fibrillation shape micropore, has excellent microparticle filter effect, can be widely applied to the fields such as pharmacy, biochemistry, microelectronics and laboratory consumptive material.Overcome HEPA filtering materials filter efficiency used in existing VMC constantly reduces with the time, the defects of need to regularly replacing.

Description

Filtering material based on poly tetrafluoroethylene and its preparation method and application
Technical field
The invention belongs to field of material technology, and in particular to a kind of filtering material based on poly tetrafluoroethylene and its Preparation method and application.
Background technology
Existing high efficiency filter material HEPA material (the i.e. high-efficiency air filterings that are all for being widely used in VMC Device) made of, most common of which material has PP filter paper, compound PET filter paper, melt-blown terylene non-woven fabric and melt-blown glass fibre. The major defect of these materials is the Electrostatic Absorption particulate matter by fiber roots, and work can be lost when use environment humidity is larger With using (general to be no longer than three months) after certain time, electrostatic interaction gradually fails, until not working.
The content of the invention
It is an object of the present invention to propose a kind of preparation method of the filtering material based on poly tetrafluoroethylene.
A kind of preparation method of filtering material based on poly tetrafluoroethylene of the present invention, comprises the following steps: S101:By PUR heating and melting to 75 DEG C~95 DEG C;S102:With the product that the step S101 is obtained by terylene needling material Bonded with poly tetrafluoroethylene;S103:The obtained products of the step S102 are subjected to curing process at room temperature, obtained with poly- Filtering material based on tetrafluoroethylene.
The filtering material based on poly tetrafluoroethylene of the present invention, using polytetrafluoroethylene (PTFE) as raw material, polytetrafluoroethylene (PTFE) Film surface is covered with fibrillation shape micropore, and for porosity more than 90%, each square inch has up to 9,000,000,000 micropores, has excellent Microparticle filter effect, can be widely applied to the fields such as pharmacy, biochemistry, microelectronics and laboratory consumptive material.Due to its hole Footpath is average at 0.2 micron, can filter the most particulate matters of PM 2.5 (particles of the general particle diameter between 0.5 to 1.0 micron Thing accounts for more than 99%).For in VMC, without changing, in theory can permanent retention its filtering accuracy, overcome existing new HEPA filtering materials filter efficiency constantly reduces with the time used in wind system, the defects of need to regularly replacing.
In addition, the preparation method of the filtering material according to the above embodiment of the present invention based on poly tetrafluoroethylene, There can also be technical characteristic additional as follows:
Further, the aperture of the poly tetrafluoroethylene is 0.1 μm~0.3 μm.
Further, the thickness of the terylene needling material is 3.0cm~3.5cm.
Further, in the step S103, the time of curing process is 45h~50h.
It is another object of the present invention to propose that described preparation method obtains based on poly tetrafluoroethylene Filtering material.
Another object of the present invention is in proposing filtering material based on poly tetrafluoroethylene in VMC Application.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
Fig. 1 is that the high efficiency filter material for core of existing VMC amplifies the picture after 500 times;
Fig. 2 is the absorption schematic diagram of the high efficiency filter material for core of existing VMC;
Fig. 3 is that the poly tetrafluoroethylene in the filtering material based on poly tetrafluoroethylene of the present invention amplifies 3000 times Electron microscope picture afterwards.
Embodiment
Embodiments of the invention are described below in detail, the embodiment is exemplary, it is intended to for explaining the present invention, and It is not considered as limiting the invention.
Embodiment 1
Embodiment 1 proposes a kind of filtering material based on poly tetrafluoroethylene, its preparation method, including following step Suddenly:
(1) by PUR heating and melting to 75 DEG C.
(2) it is 0.1 μm by terylene needling material that thickness is 3.5cm and aperture with the product that the step (1) obtains Poly tetrafluoroethylene bonds.
(3) product that the step (2) obtains is subjected to curing process 50h at room temperature, obtained with poly tetrafluoroethylene Based on filtering material.
Embodiment 2
Embodiment 2 proposes a kind of filtering material based on poly tetrafluoroethylene, its preparation method, including following step Suddenly:
(1) by PUR heating and melting to 95 DEG C.
(2) it is 0.3 μm by terylene needling material that thickness is 3.0cm and aperture with the product that the step (1) obtains Poly tetrafluoroethylene bonds.
(3) product that the step (2) obtains is subjected to curing process 45h at room temperature, obtained with poly tetrafluoroethylene Based on filtering material.
Embodiment 3
Embodiment 3 proposes a kind of filtering material based on poly tetrafluoroethylene, its preparation method, including following step Suddenly:
(1) by PUR heating and melting to 85 DEG C.
(2) it is 0.2 μm by terylene needling material that thickness is 3.2cm and aperture with the product that the step (1) obtains Poly tetrafluoroethylene bonds.
(3) product that the step (2) obtains is subjected to curing process 48h at room temperature, obtained with poly tetrafluoroethylene Based on filtering material.
As shown in Figure 1-Figure 3, the high efficiency filter filter core of existing VMC, essential core part are HEPA (i.e. efficient Filter) material, electrostatic cotton is commonly called as, its filtration of particulate matters function is realized mainly by the Electrostatic Absorption of fiber roots.When general Between more than 3 days or in humid conditions, the function of its adsorption particle thing will fail substantially.The PTFE film that the present invention uses Its aperture is 0.2 microns, and can filtering most particulate matters of PM 2.5, (general particle diameter is between 0.5 to 1.0 micron Particulate matter accounts for more than 99%), so in general fine particulates can be blocked, and PTFE film has high temperature resistant, resistance in itself Low temperature, erosion-resisting good physical behavior, so the filtering material of the present invention can be long-term use of, without changing.
To sum up, the filtering material of the invention based on poly tetrafluoroethylene, using polytetrafluoroethylene (PTFE) as raw material, polytetrafluoro Vinyl film surface is covered with fibrillation shape micropore, and for porosity more than 90%, each square inch has up to 9,000,000,000 micropores, has Excellent microparticle filter effect, it can be widely applied to the fields such as pharmacy, biochemistry, microelectronics and laboratory consumptive material.For new In wind system, without changing, in theory can permanent retention its filtering accuracy, overcome HEPA mistakes used in existing VMC Filter material material filter efficiency constantly reduces with the time, the defects of need to regularly replacing.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area Art personnel can be tied the different embodiments or example and the feature of different embodiments or example described in this specification Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned Embodiment is changed, changed, replacing and modification.

Claims (6)

1. the preparation method of a kind of filtering material based on poly tetrafluoroethylene, it is characterised in that comprise the following steps:
S101:By PUR heating and melting to 75 DEG C~95 DEG C;
S102:Terylene needling material and poly tetrafluoroethylene are bonded with the product that the step S101 is obtained;
S103:The obtained products of the step S102 are subjected to curing process at room temperature, obtained using poly tetrafluoroethylene as base The filtering material of plinth.
2. the preparation method of the filtering material according to claim 1 based on poly tetrafluoroethylene, it is characterised in that The aperture of the poly tetrafluoroethylene is 0.1 μm~0.3 μm.
3. the preparation method of the filtering material according to claim 1 based on poly tetrafluoroethylene, it is characterised in that The thickness of the terylene needling material is 3.0cm~3.5cm.
4. the preparation method of the filtering material according to claim 1 based on poly tetrafluoroethylene, it is characterised in that In the step S103, the time of curing process is 45h~50h.
5. the filtering material based on poly tetrafluoroethylene that the preparation method described in claim any one of 1-4 obtains.
6. application of the filtering material based on poly tetrafluoroethylene in VMC described in claim 5.
CN201710728201.7A 2017-08-23 2017-08-23 Filtering material based on poly tetrafluoroethylene and its preparation method and application Pending CN107376671A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710728201.7A CN107376671A (en) 2017-08-23 2017-08-23 Filtering material based on poly tetrafluoroethylene and its preparation method and application

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710728201.7A CN107376671A (en) 2017-08-23 2017-08-23 Filtering material based on poly tetrafluoroethylene and its preparation method and application

Publications (1)

Publication Number Publication Date
CN107376671A true CN107376671A (en) 2017-11-24

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CN (1) CN107376671A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000035672A1 (en) * 1998-12-11 2000-06-22 Daikin Industries, Ltd. Porous material, air filter filter medium, air filter unit and support material for air filter filter medium
CN104888532A (en) * 2014-03-05 2015-09-09 江苏创云环保科技有限公司 Novel filtering material for air cleaning machine, and preparation method and use thereof
CN104998469A (en) * 2015-06-24 2015-10-28 上海市凌桥环保设备厂有限公司 Preparation method for teflon membrane-coated filtering material
CN106492648A (en) * 2016-10-19 2017-03-15 北京佳膜环保科技有限公司 A kind of composite membrane filtering material structure and window blower fan system
CN206295726U (en) * 2016-08-29 2017-07-04 北京佳膜环保科技有限公司 Air purifier filtration core

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000035672A1 (en) * 1998-12-11 2000-06-22 Daikin Industries, Ltd. Porous material, air filter filter medium, air filter unit and support material for air filter filter medium
CN104888532A (en) * 2014-03-05 2015-09-09 江苏创云环保科技有限公司 Novel filtering material for air cleaning machine, and preparation method and use thereof
CN104998469A (en) * 2015-06-24 2015-10-28 上海市凌桥环保设备厂有限公司 Preparation method for teflon membrane-coated filtering material
CN206295726U (en) * 2016-08-29 2017-07-04 北京佳膜环保科技有限公司 Air purifier filtration core
CN106492648A (en) * 2016-10-19 2017-03-15 北京佳膜环保科技有限公司 A kind of composite membrane filtering material structure and window blower fan system

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Application publication date: 20171124

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