CN105854418A - Electret filter material and production method thereof - Google Patents
Electret filter material and production method thereof Download PDFInfo
- Publication number
- CN105854418A CN105854418A CN201610313219.6A CN201610313219A CN105854418A CN 105854418 A CN105854418 A CN 105854418A CN 201610313219 A CN201610313219 A CN 201610313219A CN 105854418 A CN105854418 A CN 105854418A
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- China
- Prior art keywords
- filter material
- production method
- electret filter
- time
- composite bed
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0001—Making filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0032—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions using electrostatic forces to remove particles, e.g. electret filters
Abstract
The invention discloses an electret filter material and a production method thereof. The production method includes combing, lapping, needling reinforcing, first ultrasonic washing, rolling, second ultrasonic washing, drying, singeing, calendering, impregnating, neatening and drying. The production processes of electret materials and non-woven materials are combined according to the characteristics of the electret materials and the structure particularity of the non-woven materials, and micro particles are captured through both mechanical blocking and electrostatic adsorption; compared with ordinary filter materials which filter out the micro particles simply through mechanical blocking, the electret filter material has the advantages that filter cakes can be formed quickly and higher filtration efficiency is achieved.
Description
Technical field
The present invention relates to the preparation method of a kind of environment-friendly materials, in particular a kind of electret filter material and production method thereof.
Background technology
Due to the fast development of China's industry, creating substantial amounts of waste gas, flue dust, exacerbate atmospheric pollution, haze weather produces
Frequency more and more higher, scope is increasing, almost covers China's major part region.The diameter granule less than 2.5 in air
Bronchus can be directly entered after in pollutant (PM2.5) suction body, cause and include asthma, bronchitis, pneumoconiosis and cardiovascular diseases etc.
Disease, healthy to people causes significant damage, has caused the serious concern of countries in the world.
Electret is the dielectric substance with long term storage electric charge function, has and can self produce quiet under conditions of without external electric field
The characteristic of electrical forces.Common fiber filter material rely primarily on Blang spread, retain, the machine such as inertial collision, gravitational settling
Tool barrier effect carried out the microgranule in air filtering, therefore undesirable less than the particulate filter effect of 1 μm to particle diameter.Only serve as
Filtering material fiber the most tiny and closely knit time could capture these small granules efficiently, this causes filtering material air drag to increase
Greatly, and then cause air filter operation energy consumption and cost to increase.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of electret filter material and production method thereof, real
The now effective filtration to fine particle.
The present invention is achieved by the following technical solutions, and the present invention comprises the following steps:
(1) combing lapping
By top fiber and lowermost fibre tidy respectively, then top fiber and lowermost fibre are laid on the upper of base fabric respectively
Under；
(2) pinprick reinforcement
Utilize pricker that the upper and lower fiber carries out repeated localised puncture to carry out reinforcing and obtain composite bed；
(3) ultrasonic washing for the first time
Composite bed after reinforcing carries out room temperature ultrasonic washing, and wash time 4～8min, ultrasonic power is more than 3kw；
(4) pressure rolling
It is 1.5～2.5mm by the laminated thickness that is rolled to after washing；
(5) ultrasonic washing for the second time
Composite bed after pressure rolling carries out second time room temperature ultrasonic washing, and wash time 4～8min, ultrasonic power is 3kw
Above；
(6) dry
Composite bed after second time ultrasonic washing is dried, dries at 160～200 DEG C, then use the cooling of cold wind negative pressure, fall
The temperature time is less than or equal to 2min；
(7) singe press polish
Use Corona charge technique to dry after composite bed singe press polish process, the speed singed is 8～18.6m/min,
The calendering temperature vitrification point higher than fiber and the softening point temperature less than fiber；
(8) dip finishing
Composite bed after press polish of singing is carried out impregnation process；
(9) dry
Use Corona charge technique to carry out drying and processing and prepare electret filter material.
Described top fiber and lowermost fibre one or more mixture in acrylic, PPS, P84, PTFE.Can be real
Existing fabulous adsorption effect.
One of optimal way as the present invention, described base fabric one or more mixture in PTFE, PPS, terylene.
In described step (2), described puncture includes the three process carried out successively, is followed successively by pre-needling, main acupuncture and pin of having a shave
Thorn；Described pre-needling pin frequency 500～700 pins/min, depth of needling 9～13mm；Main acupuncture needle frequency 750～950 pins/min,
Depth of needling 8～10mm；Have a shave pin frequency 850～950 pins/min, depth of needling 5～9mm.Punctured by repeatedly acupuncture, it is possible to
Obtain comparatively dense composite bed.
In described step (3), ultrasonic washing adds in distilled water JFC penetrating agent and the matter of 0.8～1g/L for the first time
Amount ratio 2～the weaving surfactant of 5%.
One of optimal way as the present invention, in described step (5), ultrasonic washing is carried out in distilled water for the second time.
One of optimal way as the present invention, in described step (8), described impregnation process selects waterproofing agent, PTFE emulsion
One in finishing agent and PTFE composite finishing agent.Suitable impregnation process can be selected according to the requirement of product.
In described step (7) and step (9), Corona charge technique is realized by high-pressure electrostatic generator, described high-pressure electrostatic
The positive pole of generator and negative pole add the upper and lower being located at composite bed respectively, the running voltage 23 of described high-pressure electrostatic generator～
30kv；Corona distance 40～55cm.
In described step (9), dry temperature arrive low the most again, temperature range 180 DEG C arrive fiber softening point temperature it
Between.
The electret filter material that a kind of production method as mentioned produces.
Electret fiber is generally with hundreds of supreme kilovoltage, and the gap of fiber is the least, thus defines numerous passive
Electrode, it is the highest that electric field between electrodes reaches tens MV/m, and equivalent face charge density is up to 90nC/cm2.Therefore, electret is empty
Gas filtering material, in addition to original mechanical stop effect, also relies on electrostatic force and directly attracts the charged corpuscle in air and captured,
Or the neutral corpuscle polarization in induction air is captured again, thus more effectively cross the submicron particle in air filtering,
Filter efficiency is significantly improved in the case of not increasing air drag.
The present invention has the advantage that the present invention according to the feature of electret and combines non-woven material knot compared to existing technology
The particularity of structure, combines the production technology of the two, utilizes machinery to intercept and Electrostatic Absorption double mechanism captures fine particle,
Relative to the simple common filtering material filtering fine particle by machinery obstruct, can quickly form filter cake, have higher
Filter efficiency.
Accompanying drawing explanation
Fig. 1 is the operating diagram of Corona charge.
Detailed description of the invention
Elaborating embodiments of the invention below, the present embodiment is implemented under premised on technical solution of the present invention,
Give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
The present embodiment comprises the following steps:
(1) combing lapping
By top fiber and lowermost fibre tidy respectively, then top fiber and lowermost fibre are laid on the upper of base fabric respectively
Under；The top fiber of the present embodiment and lowermost fibre are selected from PTFE selected from PPS, base fabric；
(2) pinprick reinforcement
Utilize pricker that the upper and lower fiber carries out repeated localised puncture to carry out reinforcing and obtain composite bed, puncture include carrying out successively three
Procedure, is followed successively by pre-needling, main acupuncture and acupuncture of having a shave；Described pre-needling pin frequency 700 pins/min, depth of needling 13mm；
Main acupuncture needle frequency 950 pins/min, depth of needling 10mm；Have a shave pin frequency 950 pins/min, depth of needling 9mm；
(3) ultrasonic washing for the first time
Composite bed after reinforcing carries out ultrasonic washing, wash time 8min, and ultrasonic power is more than 3kw, the most ultrasonic
Ripple washing is added in distilled water JFC penetrating agent and the weaving surfactant of mass ratio 5% of 0.8～1g/L；This enforcement
The surfactant of example is sodium cetanesulfonate.
(4) pressure rolling
It is 2.5mm by the laminated thickness that is rolled to after washing；
(5) ultrasonic washing for the second time
Composite bed after pressure rolling carries out second time ultrasonic washing, and room temperature washs, and wash time 8min, ultrasonic power is 3kw
Above；
(6) dry
Being dried by composite bed after second time ultrasonic washing, ultrasonic washing is carried out in distilled water for the second time, at 200 DEG C
Drying, then use the cooling of cold wind negative pressure, temperature fall time is less than or equal to 2min；The cooling of cold wind negative pressure is prevented from air and is dried,
Good cooling effect；
(7) singe press polish
Use Corona charge technique to dry after composite bed singe press polish process, the speed singed is 18.6m/min, pressure
The light temperature vitrification point higher than fiber and the softening point temperature less than fiber；As it is shown in figure 1, Corona charge technique is by height
Pressure electrostatic generator 1 realize, the positive pole of described high-pressure electrostatic generator 1 and negative pole add respectively be located at composite bed 2 upper strata and under
Layer, running voltage 23kv of described high-pressure electrostatic generator 1；Corona distance 40cm；
(8) dip finishing
Composite bed 2 after press polish of singing carries out impregnation process, and described impregnation process selects waterproofing agent；
(9) dry
Use Corona charge technique to carry out drying and processing and prepare electret filter material, the running voltage of high-pressure electrostatic generator 1
30kv；Corona distance 55cm, dry temperature arrive low the most again, temperature range 180 DEG C arrive fiber softening point temperature it
Between.
Embodiment 2
The present embodiment comprises the following steps:
(1) combing lapping
By top fiber and lowermost fibre tidy respectively, then top fiber and lowermost fibre are laid on the upper of base fabric respectively
Under；The top fiber of the present embodiment and lowermost fibre are selected from terylene selected from acrylic, base fabric；
(2) pinprick reinforcement
Utilize pricker that the upper and lower fiber carries out repeated localised puncture to carry out reinforcing and obtain composite bed, puncture include carrying out successively three
Procedure, is followed successively by pre-needling, main acupuncture and acupuncture of having a shave；Described pre-needling pin frequency 600 pins/min, depth of needling 10mm；
Main acupuncture needle frequency 800 pins/min, depth of needling 9mm；Have a shave pin frequency 900 pins/min, depth of needling 8mm；
(3) ultrasonic washing for the first time
Composite bed after reinforcing carries out ultrasonic washing, wash time 5min, and ultrasonic power is more than 3kw, the most ultrasonic
Ripple washing is added in distilled water JFC penetrating agent and the weaving surfactant of mass ratio 4%, this enforcement of 0.8～1g/L
The surfactant of example is SDBS dodecylbenzene sodium sulfonate；
(4) pressure rolling
It is 2mm by the laminated thickness that is rolled to after washing；
(5) ultrasonic washing for the second time
Composite bed after pressure rolling carries out second time ultrasonic washing, and wash time 5min, ultrasonic power is more than 3kw；
(6) dry
Being dried by composite bed after second time ultrasonic washing, ultrasonic washing is carried out in distilled water for the second time, at 180 DEG C
Drying, then use the cooling of cold wind negative pressure, temperature fall time is less than or equal to 2min；
(7) singe press polish
Use Corona charge technique to dry after composite bed singe press polish process, the speed singed is 15m/min, press polish
The temperature vitrification point higher than fiber and the softening point temperature less than fiber；As it is shown in figure 1, Corona charge technique passes through high pressure
Electrostatic generator 1 realizes, and positive pole and the negative pole of described high-pressure electrostatic generator 1 add the upper and lower being located at composite bed 2 respectively,
Running voltage 30kv of described high-pressure electrostatic generator 1；Corona distance 55m；
(8) dip finishing
Composite bed 2 after press polish of singing carries out impregnation process, and described impregnation process selects PTFE composite finishing agent；
(9) dry
Use Corona charge technique to carry out drying and processing and prepare electret filter material, the running voltage of high-pressure electrostatic generator 1
30kv；Corona distance 55cm, dry temperature arrive low the most again, temperature range 180 DEG C arrive fiber softening point temperature it
Between.
Embodiment 3
The present embodiment comprises the following steps:
(1) combing lapping
By top fiber and lowermost fibre tidy respectively, then top fiber and lowermost fibre are laid on the upper of base fabric respectively
Under；The top fiber of the present embodiment and lowermost fibre are selected from terylene selected from PTFE, base fabric；
(2) pinprick reinforcement
Utilize pricker that the upper and lower fiber carries out repeated localised puncture to carry out reinforcing and obtain composite bed, puncture include carrying out successively three
Procedure, is followed successively by pre-needling, main acupuncture and acupuncture of having a shave；Described pre-needling pin frequency 500 pins/min, depth of needling 9mm；
Main acupuncture needle frequency 750 pins/min, depth of needling 8mm；Have a shave pin frequency 850 pins/min, depth of needling 5mm；
(3) ultrasonic washing for the first time
Composite bed after reinforcing carries out ultrasonic washing, wash time 4min, and ultrasonic power is more than 3kw, the most ultrasonic
Ripple washing is added in distilled water JFC penetrating agent and the weaving surfactant of mass ratio 2%, this enforcement of 0.8～1g/L
The surfactant of example is SDBS dodecylbenzene sodium sulfonate；
(4) pressure rolling
It is 1.5mm by the laminated thickness that is rolled to after washing；
(5) ultrasonic washing for the second time
Composite bed after pressure rolling carries out second time ultrasonic washing, and wash time 4min, ultrasonic power is more than 3kw；
(6) dry
Being dried by composite bed after second time ultrasonic washing, ultrasonic washing is carried out in distilled water for the second time, at 160 DEG C
Drying, then use the cooling of cold wind negative pressure, temperature fall time is less than or equal to 2min；
(7) singe press polish
Use Corona charge technique to dry after composite bed singe press polish process, the speed singed is 8m/min, press polish temperature
The degree vitrification point higher than fiber and the softening point temperature less than fiber；As it is shown in figure 1, Corona charge technique is quiet by high pressure
Electricity generator 1 realizes, and positive pole and the negative pole of described high-pressure electrostatic generator 1 add the upper and lower being located at composite bed 2 respectively,
Running voltage 25kv of described high-pressure electrostatic generator 1；Corona distance 50cm；
(8) dip finishing
Composite bed 2 after press polish of singing carries out impregnation process, and described impregnation process selects PTFE emulsion finishing agent；
(9) dry
Use Corona charge technique to carry out drying and processing and prepare electret filter material, the running voltage of high-pressure electrostatic generator 1
25kv；Corona distance 50cm, dry temperature arrive low the most again, temperature range 180 DEG C arrive fiber softening point temperature it
Between.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and former
Any amendment, equivalent and the improvement etc. made within then, should be included within the scope of the present invention.
Claims (10)
1. the production method of an electret filter material, it is characterised in that comprise the following steps:
(1) combing lapping
By top fiber and lowermost fibre tidy respectively, then top fiber and lowermost fibre are laid on the upper of base fabric respectively
Under；
(2) pinprick reinforcement
Utilize pricker that the upper and lower fiber carries out repeated localised puncture to carry out reinforcing and obtain composite bed；
(3) ultrasonic washing for the first time
Composite bed after reinforcing carries out room temperature ultrasonic washing, and wash time 4～8min, ultrasonic power is more than 3kw；
(4) pressure rolling
It is 1.5～2.5mm by the laminated thickness that is rolled to after washing；
(5) ultrasonic washing for the second time
Composite bed after pressure rolling carries out second time room temperature ultrasonic washing, and wash time 4～8min, ultrasonic power is 3kw
Above；
(6) dry
Composite bed after second time ultrasonic washing is dried, dries at 160～200 DEG C, then use the cooling of cold wind negative pressure, fall
The temperature time is less than or equal to 2min；
(7) singe press polish
Use Corona charge technique to dry after composite bed singe press polish process, the speed singed is 8～18.6m/min,
The calendering temperature vitrification point higher than fiber and the softening point temperature less than fiber；
(8) dip finishing
Composite bed after press polish of singing is carried out impregnation process；
(9) dry
Use Corona charge technique to carry out drying and processing and prepare electret filter material.
The production method of a kind of electret filter material the most according to claim 1, it is characterised in that described top fiber
With lowermost fibre one or more mixture in acrylic, PPS, P84, PTFE.
The production method of a kind of electret filter material the most according to claim 1, it is characterised in that described base fabric is selected from
One or more mixture in PTFE, PPS, terylene.
The production method of a kind of electret filter material the most according to claim 1, it is characterised in that described step (2)
In, described puncture includes the three process carried out successively, is followed successively by pre-needling, main acupuncture and acupuncture of having a shave；Described pre-needling pin
Frequently 500～700 pins/min, depth of needling 9～13mm；Main acupuncture needle frequency 750～950 pins/min, depth of needling 8～10mm；
Have a shave pin frequency 850～950 pins/min, depth of needling 5～9mm.
The production method of a kind of electret filter material the most according to claim 1, it is characterised in that described step (3)
In, for the first time ultrasonic washing adds in distilled water 0.8～1g/L JFC penetrating agent and mass ratio 2～5% weaving use
Surfactant.
The production method of a kind of electret filter material the most according to claim 1, it is characterised in that described step (5)
In, ultrasonic washing is carried out in distilled water for the second time.
The production method of a kind of electret filter material the most according to claim 1, it is characterised in that described step (8)
In, described impregnation process selects the one in waterproofing agent, PTFE emulsion finishing agent and PTFE composite finishing agent.
The production method of a kind of electret filter material the most according to claim 1, it is characterised in that described step (7)
With in step (9), Corona charge technique is realized by high-pressure electrostatic generator, the positive pole of described high-pressure electrostatic generator and negative pole
Add the upper and lower being located at composite bed respectively, the running voltage 23～30kv of described high-pressure electrostatic generator；Corona distance 40～
55cm。
The production method of a kind of electret filter material the most according to claim 1, it is characterised in that described step (9)
In, to dry temperature and arrive low the most again, temperature range is between the temperature of 180 DEG C to fiber softening point.
10. the electret filter material that the production method as described in any one of claim 1～9 produces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610313219.6A CN105854418A (en) | 2016-05-11 | 2016-05-11 | Electret filter material and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610313219.6A CN105854418A (en) | 2016-05-11 | 2016-05-11 | Electret filter material and production method thereof |
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Family
ID=56630857
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| CN201610313219.6A Pending CN105854418A (en) | 2016-05-11 | 2016-05-11 | Electret filter material and production method thereof |
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Cited By (2)
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| CN107569913A (en) * | 2017-11-02 | 2018-01-12 | 无锡风正科技有限公司 | A kind of new electret filter and preparation method thereof |
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Application publication date: 20160817 |