CN105771427A - Electret non-woven filter material for air filtering - Google Patents
Electret non-woven filter material for air filtering Download PDFInfo
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- CN105771427A CN105771427A CN201610233859.6A CN201610233859A CN105771427A CN 105771427 A CN105771427 A CN 105771427A CN 201610233859 A CN201610233859 A CN 201610233859A CN 105771427 A CN105771427 A CN 105771427A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
- D01D5/34—Core-skin structure; Spinnerette packs therefor
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
- D01D5/36—Matrix structure; Spinnerette packs therefor
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C7/00—Heating or cooling textile fabrics
- D06C7/02—Setting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/02—Types of fibres, filaments or particles, self-supporting or supported materials
- B01D2239/0216—Bicomponent or multicomponent fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/10—Filtering material manufacturing
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Materials (AREA)
Abstract
The invention discloses an electret non-woven filter material for air filtering.An evenly-distributed three-dimensional spatial network structure is formed by 0.06D PET superfine fibers and 30D PE/PET skin core complex fibers, linkage joints are formed by the skin core complex fibers and the fibers in contact with the skin core complex fibers, and PTFE coatings are arranged on the surfaces of the superfine fibers and the skin core complex fibers.A preparation method of the electret non-woven filter material comprises the steps that the PET/PET figured sea-island staple fibers and the PE/PET skin core complex short fibers are mixed according to a certain mass ratio and carded, and the electret non-woven filter material is formed through needling net forming, alkali liquor melting, roll compacting and washing, PTFE emulsion dipping, tentering heat shaping and cooling curing.The electret non-woven filter material has the advantages of being high in strength, stable in size and small in resistance.The filter material is high in porosity, small and even in aperture and good in breathability.The electron work function is high, the dielectric constant is small, and the static adsorption effect on PM2.5 dust is good.Super-hydrophobic performance is achieved, and the static adsorption function of the filter material cannot be weakened by damp air.
Description
Technical field
The present invention relates to Material Field, specifically a kind of air filtration non-woven electret filtering material.
Background technology
People are for PM2.5(particle diameter fine particle below 2.5 microns in air) index growing interest.PM2.5 is mainly derived from the process such as commercial production and motor vehicle exhaust emission the residue of discharge, mostly containing noxious substances such as heavy metals, bronchus, the gas exchange of interference pulmonary can be directly entered after being inhaled into human body, cause the disease including the aspects such as asthma, bronchitis and cardiovascular diseases.Additionally, floating particle is also the main source of inhalant allergens in the air such as the pollen of particle diameter about 20 ~ 40 μm, it is easily caused allergic disease, the allergic symptoms such as nose is itched, skin is itched, eyes are itched, asthma and cough occur.How to remove these dusty gases and become a problem in the urgent need to address.
Non-woven filter material has been widely used for air filtration industry because its work flow is short, cost is low.Air filtration non-woven electret filtering material is based on acupuncture cotton non-woven fabrics and heat bonding non-woven fabrics in the market.Acupuncture cotton non-woven fabrics lasts a long time, but its arresting efficiency is relatively low, and intensity is not high, and when being especially subject to high air quantity, Inter-fiber voids can become big, poor filtration effect.Heat bonding non-woven fabrics is reinforced generally by hot roll mode, such as a kind of heat bonding non-woven fabrics disclosed in China publication CN101058960, although refer to the blending structure of use " small diameter fibers of 10～25 microns " and " large-diameter fibers of 30～50 microns ", and refer to the core-skin composite fiber in " low-melting-point resin portion ", so-called high rigidity can be reached, high-tensile advantage, but it is not specifically described proportioning and the thickness requirement of concrete each kinds of fibers, and the mode that hot roll is reinforced causes outer layer fiber bonding, inner fiber does not have bonding phenomenon, shortcoming is in that venting quality declines, resistance increases, permeability and filter efficiency are relatively low.What is more important, the aperture of the filtering material being made up of conventional fibre is relative to those fine particles or bigger than normal, and dust particale can not effectively be intercepted, and therefore conventional fibre non-woven filter material is extremely difficult to filter the index request of PM2.5.
At present, islands-in-sea bicomponent fibre makes non-weaving cloth finished product through acupuncture or spun lacing, then passes through Caustic soda decrement fibrillation and can obtain superfine fibre filtrate, and filtering accuracy increases, but the effect for PM2.5 dust-filtering is still not good.A kind of PET/PET sea-island fibre floor height fine straining material disclosed in China publication CN202654812, PM2.5 dust-filtering problem is made moderate progress, but owing to the diameter of superfine fibre is relatively thin, yielding when high air quantity, there is the problem that dimensional stability, filtering accuracy are undesirable.The manufacture method of the super fine Wiping material in a kind of well-pressed Ding Dao island disclosed in China publication CN101058960, the method adopting island fiber with figured sea-island and polypropylene short fiber mixing improves the dimensional stability requirements of non-woven material, but this patented method is only capable of solving the fluffy and well-pressed characteristic that Wiping material needs, and still cannot solve the filtering accuracy problem needed for air filting material.Tracing it to its cause, the pore size filter of the superfine fibre filtrate prepared by islands-in-sea bicomponent fibre PM2.5 granule comparatively speaking or bigger than normal, dust particale is still easy in permeable material inlet chamber.
Utilize electrostatic force trapping grit, there is the advantages such as filter efficiency height, resistance be little and antibacterial, the conventional electret fiber of air filting material reaches the purpose of Electrostatic Absorption micronic dust, but the complex process such as conventional electret method such as corona discharge method, thermal poling method, low-energy electron beam blast technique, with high costs.A kind of high performance PET filtrate disclosed in China publication CN203862028, its filtrate is through PTFE emulsion impregnation process, make use of the corrosion resistance of PTFE and filter deashing, but add a polyester filament with stainless steel silk mixed yarn to eliminate electrostatic at terylene base cloth layer warp thread at interval of 10mm, obtain anlistatig terylene filtrate, it is impossible to realize the purpose of Electrostatic Absorption micronic dust.
Therefore, for crossing the requirement of PM2.5 dust in air filtering, it is badly in need of exploitation and is suitable for the non-woven electret material of automobile air conditioner filter, Domestic air purifier, building filter for air condition, toilet, filtration system used for vehicle.
Summary of the invention
It is an object of the invention to provide a kind of air filtration non-woven electret filtering material, with the problem solving to propose in above-mentioned background technology.
For achieving the above object, the present invention provides following technical scheme:
A kind of air filtration non-woven electret filtering material, equally distributed three-dimensional space network structure is formed by the PE/PET core-skin composite fiber of the PET superfine fibre of 0.06D and 3D, the processbearing astrocyte that core-skin composite fiber is in contact with it couples node, at the surface configuration PTFE coat of superfine fibre and core-skin composite fiber.
As the further scheme of the present invention: the preparation method of described air filtration non-woven electret filtering material is: PET/PET figured sea-island staple fibre and PE/PET core-skin type composite short fiber than after mixing, combing, become net, alkali liquor to melt through acupuncture with certain mass, roll compacting washing, PTFE emulsion dipping, tentering thermal finalization and cooling curing form.
As the present invention further scheme: described PET/PET figured sea-island staple fibre is 3.5D × 51mm figured sea-island staple fibre, wherein sea component is water-soluble modified PET, and island component is conventional PET, Hai Yu island ratio is 30: 70, and island number is 37.
As the present invention further scheme: described PE/PET core-skin type composite short fiber is 3.5D × 51mm core-skin type composite short fiber, and wherein skin component is PE, core component is conventional PET, Pi Yuxin ratio is 20: 80.
As the present invention further scheme: the mass ratio of described PET/PET figured sea-island staple fibre and PE/PET core-skin type composite short fiber is 20:80.
As the present invention further scheme: described alkali liquor melts finger by fleece containing being immersed in the aqueous solution containing 8%NAOH and 0.6wt% cetyl trimethylammonium bromide, carries out 30 minutes decrements again through the steam boxs of 95 DEG C.
As the present invention further scheme: in described PTFE emulsion dipping, fibroreticulate solid increment is 10%.
As the present invention further scheme: described tentering heat setting temperature is 135 DEG C-180 DEG C.
As the present invention further scheme: the grammes per square metre of described non-woven electret filtering material is 330g/m2。
Compared with prior art, the invention has the beneficial effects as follows:
(1) non-woven electret filtering material is formed equally distributed three-dimensional space network structure by the minor diameter superfine fibre of 0.06D and the major diameter core-skin composite fiber of 3D, the processbearing astrocyte that wherein PE in major diameter core-skin composite fiber contacts with other under heat setting temperature couples node, play the supporting function of three-dimensional space network, thus make filtering material have intensity height, dimensionally stable, advantage that resistance is little；
(2) in non-woven electret filtering material, the diameter of the superfine fibre that sea-island fibre is obtained after the molten process of over subtraction is little, specific surface area big, and therefore the porosity of filtering material is high, aperture is little and uniform, good permeability；
(3) non-woven electret filtering material is due to through PTFE emulsion impregnation process, one layer of PTFE coat is formed at fiber surface, electron work functon is high, dielectric constant is low, big with the frictional static voltage of air, particularly in during as air filtration electret, the Electrostatic Absorption effect for PM2.5 dust is especially good；The electrostatic formed with windage can not cut down for a long time, and the C-F key bond energy of PTFE is very strong, and free energy is low, has ultra-hydrophobicity, and even malaria can not weaken the effect of its Electrostatic Absorption.
Accompanying drawing explanation
Fig. 1 is the structural representation of air filtration non-woven electret filtering material.
Fig. 2 is the structural representation of PE/PET core-sheath compound fibre in air filtration non-woven electret filtering material.
Fig. 3 is the structural representation of superfine fibre in air filtration non-woven electret filtering material.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
Refer to Fig. 1～3, in the embodiment of the present invention, a kind of air filtration non-woven electret filtering material, non-woven electret filtering material is formed equally distributed three-dimensional space network structure by the PET superfine fibre 2 of 0.06D and the PE/PET core-skin composite fiber 1 of 3D, the processbearing astrocyte that core-skin composite fiber is in contact with it couples node, there is PTFE coat on the surface of superfine fibre and core-skin composite fiber.
The preparation method of non-woven electret filtering material is: 3.5D × 51mmPET/PET figured sea-island staple fibre and 3.5D × 51mmPE/PET core-skin type composite short fiber mix with the mass ratio of 20:80, after combing, become net, alkali liquor to melt through acupuncture, roll compacting washing, PTFE emulsion dipping, tentering thermal finalization and cooling curing form, wherein the sea component of figured sea-island staple fibre is water-soluble modified PET, island component is conventional PET, Hai Yu island ratio is 30: 70, and island number is 37；The skin component of core-skin type composite short fiber is PE, and core component is conventional PET, Pi Yuxin ratio is 20: 80；By the fleece of acupuncture containing being immersed in the aqueous solution containing 8%NAOH and 0.6wt% cetyl trimethylammonium bromide, 30 minutes decrements are carried out again through the steam boxs of 95 DEG C, dipping PTFE emulsion after roll compacting is washed, making fibroreticulate solid increment is 10%, then thermal finalization at the temperature of 135 DEG C-180 DEG C；The grammes per square metre of non-woven electret filtering material is 330g/m2。
Arizona micronic dust measurement method according to international standard ISO12103-1, non-woven electret filtering material filter efficiency of the present invention is for PM1-PM3 grade micronic dust stop rate >=99.99%, and filter efficiency is significantly better than the traditional filter material level for PM1-PM3 grade micronic dust stop rate < 98%.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when without departing substantially from the spirit of the present invention or basic feature, it is possible to realize the present invention in other specific forms.Therefore, no matter from which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the invention rather than described above limits, it is intended that all changes in the implication of the equivalency dropping on claim and scope included in the present invention.Any accompanying drawing labelling in claim should be considered as the claim that restriction is involved.
In addition, it is to be understood that, although this specification is been described by according to embodiment, but not each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity sake, description should be made as a whole by those skilled in the art, and the technical scheme in each embodiment through appropriately combined, can also form other embodiments that it will be appreciated by those skilled in the art that.
Claims (9)
1. an air filtration non-woven electret filtering material, it is characterized in that, equally distributed three-dimensional space network structure is formed by the PE/PET core-skin composite fiber of the PET superfine fibre of 0.06D and 3D, the processbearing astrocyte that core-skin composite fiber is in contact with it couples node, at the surface configuration PTFE coat of superfine fibre and core-skin composite fiber.
2. the preparation method of an air filtration non-woven electret filtering material as claimed in claim 1, it is characterized in that, PET/PET figured sea-island staple fibre and PE/PET core-skin type composite short fiber than after mixing, combing, become net, alkali liquor to melt through acupuncture with certain mass, roll compacting washing, PTFE emulsion dipping, tentering thermal finalization and cooling curing form.
3. the preparation method of air filtration non-woven electret filtering material according to claim 2, it is characterized in that, described PET/PET figured sea-island staple fibre is 3.5D × 51mm figured sea-island staple fibre, wherein sea component is water-soluble modified PET, island component is conventional PET, Hai Yu island ratio is 30: 70, and island number is 37.
4. the preparation method of air filtration non-woven electret filtering material according to claim 2, it is characterized in that, described PE/PET core-skin type composite short fiber is 3.5D × 51mm core-skin type composite short fiber, and wherein skin component is PE, core component is conventional PET, Pi Yuxin ratio is 20: 80.
5. the preparation method of air filtration non-woven electret filtering material according to claim 2, it is characterised in that the mass ratio of described PET/PET figured sea-island staple fibre and PE/PET core-skin type composite short fiber is 20:80.
6. the preparation method of air filtration non-woven electret filtering material according to claim 2, it is characterized in that, described alkali liquor melts finger by fleece containing being immersed in the aqueous solution containing 8%NAOH and 0.6wt% cetyl trimethylammonium bromide, carries out 30 minutes decrements again through the steam boxs of 95 DEG C.
7. the preparation method of air filtration non-woven electret filtering material according to claim 2, it is characterised in that in described PTFE emulsion dipping, fibroreticulate solid increment is 10%.
8. the preparation method of air filtration non-woven electret filtering material according to claim 2, it is characterised in that described tentering heat setting temperature is 135 DEG C-180 DEG C.
9. the preparation method of air filtration non-woven electret filtering material according to claim 2, it is characterised in that the grammes per square metre of described non-woven electret filtering material is 330g/m2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610233859.6A CN105771427B (en) | 2016-04-16 | 2016-04-16 | A kind of air filtration non-woven electret filtering material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610233859.6A CN105771427B (en) | 2016-04-16 | 2016-04-16 | A kind of air filtration non-woven electret filtering material |
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| Publication Number | Publication Date |
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| CN105771427A true CN105771427A (en) | 2016-07-20 |
| CN105771427B CN105771427B (en) | 2018-05-15 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107174868A (en) * | 2017-05-02 | 2017-09-19 | 杭州创克洛环境科技有限公司 | A kind of vehicle-mounted air purification piece and preparation method thereof |
| CN110545894A (en) * | 2017-02-21 | 2019-12-06 | 霍林斯沃思和沃斯有限公司 | Electret-containing filter media |
| CN110812947A (en) * | 2019-10-18 | 2020-02-21 | 东莞市亿茂滤材有限公司 | Electret non-woven filter material with cavity structure and preparation method thereof |
| CN111467879A (en) * | 2020-04-09 | 2020-07-31 | 立赫产业有限公司 | Multifunctional electrostatic electret filter material and preparation method thereof |
| CN112191051A (en) * | 2020-11-19 | 2021-01-08 | 河南科高新材料有限公司 | Static-free mask filtering membrane and preparation method thereof |
| CN112387008A (en) * | 2020-10-26 | 2021-02-23 | 安徽中电环保材料股份有限公司 | Antioxidant PPS filtering material and preparation process thereof |
| CN114150437A (en) * | 2021-12-10 | 2022-03-08 | 东莞市利韬过滤材料有限公司 | PET dry method skeleton composite melt-blown purification non-woven fabric and preparation process thereof |
| CN114504951A (en) * | 2022-01-24 | 2022-05-17 | 华南理工大学 | A recyclable electret filter membrane and its preparation method, cleaning and charge regeneration method |
| US12220659B2 (en) | 2017-02-21 | 2025-02-11 | Hollingsworth & Vose Company | Electret-containing filter media |
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| JP2004076248A (en) * | 2002-07-31 | 2004-03-11 | Daiwabo Co Ltd | Melt-blown nonwoven fabric, laminated melt-blown nonwoven fabric and wiper |
| CN1528500A (en) * | 2003-10-16 | 2004-09-15 | 同济大学 | Preparation method of polytetrafluoroethylene electret porous filter membrane |
| CN101073751A (en) * | 2007-04-06 | 2007-11-21 | 浙江科技学院 | Composite electret filter materials |
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| CN110812947B (en) * | 2019-10-18 | 2022-02-08 | 东莞市亿茂滤材有限公司 | Electret non-woven filter material with cavity structure and preparation method thereof |
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| CN114504951A (en) * | 2022-01-24 | 2022-05-17 | 华南理工大学 | A recyclable electret filter membrane and its preparation method, cleaning and charge regeneration method |
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