CN109758831A - The preparation method of high-efficiency air filtering material - Google Patents
The preparation method of high-efficiency air filtering material Download PDFInfo
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- CN109758831A CN109758831A CN201910173272.4A CN201910173272A CN109758831A CN 109758831 A CN109758831 A CN 109758831A CN 201910173272 A CN201910173272 A CN 201910173272A CN 109758831 A CN109758831 A CN 109758831A
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Abstract
The invention discloses a kind of preparation method of high-efficiency air filtering material, include the following steps: Step 1: carrying out pre-treatment to the spunbond non-woven cloth of PET, PET melt-blow nonwoven；Step 2: by the spunbond non-woven cloth of PET after pre-treatment and between PET melt-blow nonwoven carry out interlayer bonding it is compound；Step 3: preparing composite filter layer of cloth；Step 4: composite filter layer of cloth to be compounded in another surface of PET melt-blow nonwoven using bonding mode, high-efficiency air filtering material is obtained.The air filting material that the present invention is prepared includes being binded between three layers, three layers by binder, and between layers using point bonding mode, in addition to sticky point, filtration material layer other parts are not covered by binder filter material, can guarantee the gas permeability of entire filtering material；Filtering material forms the structure of the different porosity of multilayer in thickness direction, constructs good appearance dirt gradient, filter efficiency with higher and dust containing capacity, can reach ideal protection effect under the conditions of various polluting weathers.
Description
Technical field
The invention belongs to air filting material technical fields, and in particular, to a kind of preparation of high-efficiency air filtering material
Method.
Background technique
In recent years, industrialization development is rapid, and ur- banization speed is constantly accelerated, and various pollution problems are come thick and fast, hollow
Gas, which pollutes oneself, becomes a main problem of environmental pollution instantly.Plant gas, vehicle exhaust, building dust, resident living etc.
A large amount of soot dust granule has been discharged, and these particulate matters also provide the carrier of growth and breeding for bacterium.These not merely can be tight
The health of people is threatened again, while can also generate adverse effect to natural climate, destroys animal, oneself that plant depend on for existence
Right environment.Therefore, fine solid particle particulate matter and the mouth with excellent anti-bacterium capability in air can effectively be stopped by designing and preparing out
Cover filter cloth materials are to put key subjects in face of the mankind, concerning human health.It is above in the micron-scale for size
Particle, conventional nonwoven mask filter cloth can have preferable strainability, but for size in sub-micron even nanoscale
Particulate matter or bacterium, conventional nonwoven mask filter cloth are poor to its strainability, and have antibacterial functionalized air mistake
Filter material material is even more fewer and fewer.
Though conventional filter material is difficult to realize to sub-micron particle filter efficiency with higher more than micron order
Effective filtering of grade particles, and that there are stain resistances is weak, service life is short, does not have the disadvantages of antibiotic property, it again can not be complete
Requirement of the full up foot people to high efficiency filter material.For the deficiency for making up conventional filter material, novel and multifunctional, high added value mistake
The exploitation of filter material material is imperative.
Summary of the invention
The purpose of the present invention is to provide a kind of preparation method of high-efficiency air filtering material, the sky that the present invention is prepared
Gas filtering material includes three layers, and first layer is the spunbond non-woven cloth of PET, and the second layer is PET melt-blow nonwoven, and third layer is multiple
Filter layer of cloth is closed, is binded between three layers by binder, filter material using point bonding mode, is put under bonding mode, removed between layers
Outside sticky point, filtration material layer other parts are not covered by binder, and there are still more gaps, can guarantee entire filtering material
Gas permeability；The spunbond non-woven cloth fibre diameter of PET and aperture are all larger, and PET melt-blow nonwoven has fiber finer, hole more
And the feature that aperture size is small, the fibre diameter of composite filter layer of cloth and aperture are also larger, and filtering material forms more in thickness direction
The structure of the different porosity of layer constructs a good appearance dirt gradient, therefore filter efficiency with higher and dust containing capacity,
It can reach ideal protection effect under the conditions of various polluting weathers.
The purpose of the present invention can be achieved through the following technical solutions:
The preparation method of high-efficiency air filtering material, includes the following steps:
Step 1: pre-treatment is carried out to the spunbond non-woven cloth of PET, PET melt-blow nonwoven, specifically, being dipped in matter
Amount concentration is respectively in the mixed solution of the penetrating agent JFC of the NaOH and 5g/L of 25g/L, and 100 DEG C of water-baths impregnate 1h, and bath raio is
20:1, dipping take out be washed with deionized water to neutrality after the completion, be dried for standby；
Wherein, the spunbond non-woven cloth of the PET with a thickness of 0.34-0.4mm, the thickness of the PET melt-blow nonwoven
For 0.3-0.35mm；
Step 2: carrying out the spunbond non-woven cloth of PET after pre-treatment and between PET melt-blow nonwoven interlayer bonding again
It closes, specifically, it is compound to use a point bonding mode to carry out, is uniformly spread on the spunbond non-woven cloth of PET according to vertical, horizontal interval 3cm
Point coating adhesive, is covered with PET melt-blow nonwoven, and places it in 45 DEG C of baking oven and take out after dry 70-80min, complete
At the compound of the spunbond non-woven cloth of PET and PET melt-blow nonwoven；
Step 3: formed by catalytic active particles to be continuously and uniformly sprayed at and change on terylene needled felt by Modified Activated Carbon fiber lay down
On property Carbon fibe material, it is then covered with one layer of modified Carbon fibe again, then place one layer of woven dacron, carries out hydraulic compacting, hydraulic press
Temperature setting be 50 DEG C, pressure 2MPa, be made composite filter layer of cloth；Wherein, the fountain height of formed by catalytic active particles is Modified Activated Carbon
The 10% of the quality of fiber, obtained composite filter layer of cloth with a thickness of 0.12-0.15mm；
Step 4: the composite filter layer of cloth is compounded in another surface of PET melt-blow nonwoven using bonding mode,
Specifically, uniformly spreading a coating adhesive on PET melt-blow nonwoven according to vertical, horizontal interval 3cm, it is covered with compound filter cloth
Layer places it in 50 DEG C of baking oven and takes out after dry 60-70min, obtains high-efficiency air filtering material.
Further, the high-efficiency air filtering material includes three layers, and first layer is the spunbond non-woven cloth of PET, the second layer
For PET melt-blow nonwoven, third layer is composite filter layer of cloth, is binded between three layers by binder.
Further, the binder is prepared by the following method:
It weighs guar gum to be added in distilled water, the heating stirring under 70-80 DEG C of water bath condition, after gelatin is completely dissolved
Carboxymethyl cellulose is added, continues stirring to dissolving, obtains binder；
Wherein, mass ratio used in guar gum, carboxymethyl cellulose and distilled water is 2:1:30.
Further, modified Carbon fibe described in step 3 is made by the following method:
1) oxidization fiber is added in the concentrated nitric acid that mass fraction is 30% according to solid-liquid ratio 1g:15-20mL and impregnates 10min
Ultrasound 30min afterwards, is cooled to room temperature, and filters and is washed oxidization fiber to neutrality with a large amount of deionized waters, and it is dry to be put in 130 DEG C of vacuum
Dry 4h in dry case；
2) the precuring silk after drying is placed in tube furnace, in 80cm3The CO of/min flow velocity2Under gas with 10-15 DEG C/
The heating rate of min is warming up to 900-1100 DEG C, and heat preservation activation 100-130min is cooled to room temperature, activated carbon fibre is made；
3) active carbon fibre Wesy acetone and deionized water are washed 3-4 times respectively, the dry 5- in 120 DEG C of vacuum ovens
6h；
4) activated carbon fibre after drying is immersed in the NaOH solution of mass fraction 20%, is taken out after ultrasonic 10min
Drying, then the activated carbon fibre of drying is put into quartz ampoule, in 100cm3The N of/min flow velocity2With the liter of 10 DEG C/min under atmosphere
Warm rate is warming up to 750-850 DEG C, keeps the temperature 3h, takes out, and is washed repeatedly with deionized water to neutrality, drying；
5) activated carbon fibre after drying above-mentioned steps is placed again into quartz ampoule, in 150cm3The NH of/min flow velocity3Gas
It is warming up to 780-820 DEG C with the heating rate of 5 DEG C/min under atmosphere, stops logical NH after keeping the temperature 90min3, in N2Room is cooled under atmosphere
It is taken out after temperature, modified Carbon fibe is made.
Further, formed by catalytic active particles described in step 3 is prepared by the following method:
It is that 1:19 will carry silver TiO according to mass ratio2Powder is mixed into P25 type TiO2In nano particle, then in 90 DEG C of condition
It grinds and sieves with 100 mesh sieve after lower vacuum drying 3h, obtain formed by catalytic active particles；
Wherein, silver TiO is carried2The partial size of powder is 30nm.
Beneficial effects of the present invention:
Using modified Carbon fibe as main body in composite filter layer of cloth of the invention, the activated carbon fibre being heat-treated by NaOH
Surface produces a large amount of micropore, and the generation of these micropores increases the specific surface area and Kong Rong of activated carbon fibre, reduces work
The average pore size of property Carbon fibe, improves the absorption property (physical absorption) of activated carbon fibre significantly；Ammonia is heat-treated it again
Afterwards, activated carbon fibre surface can react the nitrogen-containing functional group to be formed based on pyridine type nitrogen, and will not make activated carbon fibre surface
It produces fracture and the destruction of surface texture, pyridine type nitrogen is containing a heterocyclic nitrogen atom in hexatomic ring, on this nitrogen-atoms
There are the lone pair electrons of a pair of non-bonding to be in SP2Hybridized orbit, and there is no conjugation is participated in, so it can and volatilize
H on the polar gas molecule of property combines to form hydrogen bond, for adsorbing polar molecule gas, therefore, in active carbon fibre dimension table
Its adsorption capacity (chemisorption) to polar molecule gas can be enhanced in the increase of the quantity of the pyridine type nitrogen-containing functional group in face；
By the activated carbon fibre that alkali heat-treatment and ammonia are heat-treated, physical absorption and chemisorption can be significantly improved, is adsorbed
The modification Carbon fibe haveing excellent performance；
Formed by catalytic active particles, P25 type TiO have been sprayed in composite filter layer of cloth of the invention between Modified Activated Carbon fibrous layer2It receives
Rice grain has very big specific surface area, and the very strong superoxide radical of activity and hydroxyl radical free radical, meeting are produced when by light
Catalysis oxidation volatile organic matter, to have the function that degradation of contaminant, in addition, this TiO2When encountering bacterium, can urge
Change the organic matter in oxidative cell, achievees the effect that kill bacterium, but it only just has catalysis and antibacterial work under ultraviolet light
Property, the load silver TiO for being 30nm by partial size2(Ag/TiO2) P25 type TiO is mixed into certain proportion2In, it is greatly improved TiO2Powder
Anti-microbial property so that formed by catalytic active particles have efficient photocatalysis performance and anti-microbial property；
The air filting material that the present invention is prepared includes three layers, and first layer is the spunbond non-woven cloth of PET, and the second layer is
PET melt-blow nonwoven, third layer are composite filter layer of cloth, are binded between three layers by binder, filter material uses between layers
Point bonding mode is put under bonding mode, and in addition to sticky point, filtration material layer other parts are not covered by binder, and there are still more
Gap can guarantee the gas permeability of entire filtering material；The spunbond non-woven cloth fibre diameter of PET and aperture are all larger, and PET is molten
Blowing nonwoven has the characteristics that fiber finer, hole are more and aperture size is small, the fibre diameter of composite filter layer of cloth and aperture also compared with
Greatly, filtering material forms the structure of the different porosity of multilayer in thickness direction, constructs a good appearance dirt gradient, therefore have
There are higher filter efficiency and dust containing capacity, can reach ideal protection effect under the conditions of various polluting weathers.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with embodiment, it is clear that described reality
Applying example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is general
Logical technical staff all other embodiment obtained without creative efforts belongs to what the present invention protected
Range.
The preparation method of high-efficiency air filtering material, the high-efficiency air filtering material include three layers, and first layer is PET spinning
Glutinous non-woven cloth, the second layer are PET melt-blow nonwoven, and third layer is composite filter layer of cloth, are binded between three layers by binder；
The binder is prepared by the following method:
It weighs guar gum to be added in distilled water, the heating stirring under 70-80 DEG C of water bath condition, after gelatin is completely dissolved
Carboxymethyl cellulose is added, continues stirring to dissolving, obtains binder；
Wherein, mass ratio used in guar gum, carboxymethyl cellulose and distilled water is 2:1:30；
When using guar gum as Binder Course merely, the high requirement of intensity can be reached, but filtration material layer quality can be made harder,
Keep filtration material layer soft when conversely, carboxymethyl cellulose is used alone, but bonding strength is inadequate, when the two is according to the ratio
When being used in mixed way, cooperates, required bond strength can either be reached, and the flexibility of filtration material layer can be improved；
The preparation method of the high-efficiency air filtering material, includes the following steps:
Step 1: pre-treatment is carried out to the spunbond non-woven cloth of PET, PET melt-blow nonwoven, specifically, being dipped in matter
Amount concentration is respectively in the mixed solution of the penetrating agent JFC of the NaOH and 5g/L of 25g/L, and 100 DEG C of water-baths impregnate 1h, and bath raio is
20:1, dipping take out be washed with deionized water to neutrality after the completion, be dried for standby；
Wherein, the spunbond non-woven cloth of PET with a thickness of 0.34-0.4mm, PET melt-blow nonwoven with a thickness of 0.3-
0.35mm；
Step 2: by after pre-treatment the spunbond non-woven cloth of PET (first layer) and PET melt-blow nonwoven (second layer) it
Between carry out interlayer bonding it is compound, specifically, using point a bonding mode carry out it is compound, it is spunbond in PET according to vertical, horizontal interval 3cm
A coating adhesive is uniformly spread on non-woven cloth, is covered with PET melt-blow nonwoven, and is placed it in dry in 45 DEG C of baking oven
It is taken out after 70-80min, completes the compound of first layer and the second layer；
Step 3: wherein terylene needled felt plays the role of stress buffer by Modified Activated Carbon fiber lay down on terylene needled felt, prevent
Only the excessive structure to material of material pressure damages, and formed by catalytic active particles is continuously and uniformly sprayed to Modified Activated Carbon undulation degree
On material, it is then covered with one layer of modified Carbon fibe again, then place one layer of woven dacron, carries out hydraulic compacting, the temperature setting of hydraulic press
It is 50 DEG C, pressure 2MPa, is made composite filter layer of cloth (third layer)；Wherein, the fountain height of formed by catalytic active particles is modified Carbon fiber
The 10% of the quality of dimension, obtained composite filter layer of cloth with a thickness of 0.12-0.15mm；
Step 4: the composite filter layer of cloth is compounded in PET melt-blow nonwoven (second layer) using a bonding mode
Another surface is covered with specifically, uniformly spreading a coating adhesive on PET melt-blow nonwoven according to vertical, horizontal interval 3cm
Composite filter layer of cloth places it in 50 DEG C of baking oven and takes out after dry 60-70min, obtains high-efficiency air filtering material；
Filter material using a bonding mode, is put under bonding mode, in addition to sticky point, filtration material layer other parts are not between layers
It is covered by binder, there are still more gaps, it can guarantee the gas permeability of entire filtering material, and it is compound under face bonding mode
Surface of filter medium is covered by adhesive, and the gap between fiber and fiber is full of binder, causes its resistance pressure drop larger, is breathed freely
Property is poor；
The spunbond non-woven cloth fibre diameter of PET and aperture are all larger in air filting material, and PET melt-blow nonwoven has
Have the characteristics that fiber finer, hole are more and aperture size is small, the fibre diameter of composite filter layer of cloth and aperture are also larger, and filtering material exists
Thickness direction forms the structure of the different porosity of multilayer, constructs a good appearance dirt gradient, therefore filtering with higher
Efficiency and dust containing capacity can reach ideal protection effect under the conditions of various polluting weathers；
Wherein, modified Carbon fibe described in step 3 is made by the following method:
1) oxidization fiber is added in the concentrated nitric acid that mass fraction is 30% according to solid-liquid ratio 1g:15-20mL and impregnates 10min
Ultrasound 30min afterwards, is cooled to room temperature, and filters and is washed oxidization fiber to neutrality with a large amount of deionized waters, and it is dry to be put in 130 DEG C of vacuum
Dry 4h in dry case；
2) the precuring silk after drying is placed in tube furnace, in CO2Gas (80cm3/ min) under with 10-15 DEG C/min's
Heating rate is warming up to 900-1100 DEG C, and heat preservation activation 100-130min is cooled to room temperature, activated carbon fibre is made；
3) active carbon fibre Wesy acetone and deionized water are washed 3-4 times respectively, the dry 5- in 120 DEG C of vacuum ovens
6h；
4) activated carbon fibre after drying is immersed in the NaOH solution of mass fraction 20%, is taken out after ultrasonic 10min
Drying, then the activated carbon fibre of drying is put into quartz ampoule, in N2Atmosphere (100cm3/ min) under with the heating of 10 DEG C/min speed
Rate is warming up to 750-850 DEG C, keeps the temperature 3h, takes out, and is washed repeatedly with deionized water to neutrality, drying；
5) activated carbon fibre after drying above-mentioned steps is placed again into quartz ampoule, in NH3Atmosphere (150cm3/ min) under
It is warming up to 780-820 DEG C with the heating rate of 5 DEG C/min, stops logical NH after keeping the temperature 90min3, in N2After being cooled to room temperature under atmosphere
It takes out, modified Carbon fibe is made；
A large amount of micropore is produced by the activated carbon fibre surface that NaOH is heat-treated, the generation of these micropores increases work
The specific surface area and Kong Rong of property Carbon fibe, reduce the average pore size of activated carbon fibre, improve activated carbon fibre significantly
Absorption property (physical absorption)；Again after ammonia heat treatment, activated carbon fibre surface can react to be formed based on pyridine type nitrogen
Nitrogen-containing functional group, and activated carbon fibre surface will not be made to produce fracture and the destruction of surface texture, pyridine type nitrogen is hexatomic ring
In contain a heterocyclic nitrogen atom, there are the lone pair electrons of a pair of non-bonding to be in SP on this nitrogen-atoms2Hybridized orbit, and simultaneously
It is not engaged in conjugation, so it can combine to form hydrogen bond with the H on volatile polar gas molecule, for adsorbing
Therefore it is right that its can be enhanced in the increase of the quantity of the pyridine type nitrogen-containing functional group on activated carbon fibre surface in polar molecule gas
The adsorption capacity (chemisorption) of polar molecule gas；By the activated carbon fibre that alkali heat-treatment and ammonia are heat-treated, Neng Gouxian
It writes and improves physical absorption and chemisorption, obtain the excellent modification Carbon fibe of absorption property；
Formed by catalytic active particles described in step 3 is prepared by the following method:
It is that 1:19 will carry silver TiO according to mass ratio2Powder is mixed into P25 type TiO2In nano particle, then in 90 DEG C of condition
It grinds and sieves with 100 mesh sieve after lower vacuum drying 3h, obtain formed by catalytic active particles；
Wherein, silver TiO is carried2The partial size of powder is 30nm, the production of Guangzhou Yan Rui Chemical Co., Ltd.；
P25 type TiO2Nano particle has very big specific surface area, and activity very strong super oxygen is produced when by light certainly
By base and hydroxyl radical free radical, meeting catalysis oxidation volatile organic matter, to have the function that degradation of contaminant, in addition, this
TiO2When encountering bacterium, can the intracellular organic matter of catalysis oxidation, achieve the effect that kill bacterium, but it is only in ultraviolet light
Load silver TiO that is lower just to there is catalysis and bacteriostatic activity, being 30nm by partial size2(Ag/TiO2) P25 type TiO is mixed into certain proportion2
In, it is greatly improved TiO2The anti-microbial property of powder, so that formed by catalytic active particles has efficient photocatalysis performance and antibiotic property
Energy.
Embodiment 1
The preparation method of high-efficiency air filtering material, includes the following steps:
Step 1: pre-treatment is carried out to the spunbond non-woven cloth of PET, PET melt-blow nonwoven, specifically, being dipped in matter
Amount concentration is respectively in the mixed solution of the penetrating agent JFC of the NaOH and 5g/L of 25g/L, and 100 DEG C of water-baths impregnate 1h, and bath raio is
20:1, dipping take out be washed with deionized water to neutrality after the completion, be dried for standby；
Step 2: carrying out the spunbond non-woven cloth of PET after pre-treatment and between PET melt-blow nonwoven interlayer bonding again
It closes, specifically, it is compound to use a point bonding mode to carry out, is uniformly spread on the spunbond non-woven cloth of PET according to vertical, horizontal interval 3cm
Point coating adhesive, is covered with PET melt-blow nonwoven, and places it in 45 DEG C of baking oven and take out after dry 70min, completes the
One layer and the second layer it is compound；
Step 3: wherein terylene needled felt plays the role of stress buffer by Modified Activated Carbon fiber lay down on terylene needled felt, prevent
Only the excessive structure to material of material pressure damages, and formed by catalytic active particles is continuously and uniformly sprayed to Modified Activated Carbon undulation degree
On material, it is then covered with one layer of modified Carbon fibe again, then place one layer of woven dacron, carries out hydraulic compacting, the temperature setting of hydraulic press
It is 50 DEG C, pressure 2MPa, composite filter layer of cloth is made；Wherein, the fountain height of formed by catalytic active particles is the quality of modified Carbon fibe
10%, obtained composite filter layer of cloth with a thickness of 0.12mm；
Step 4: the composite filter layer of cloth is compounded in PET melt-blow nonwoven (second layer) using a bonding mode
Another surface is covered with specifically, uniformly spreading a coating adhesive on PET melt-blow nonwoven according to vertical, horizontal interval 3cm
Composite filter layer of cloth places it in 50 DEG C of baking oven and takes out after dry 60min, obtains high-efficiency air filtering material.
Embodiment 2
The preparation method of high-efficiency air filtering material, includes the following steps:
Step 1: pre-treatment is carried out to the spunbond non-woven cloth of PET, PET melt-blow nonwoven, specifically, being dipped in matter
Amount concentration is respectively in the mixed solution of the penetrating agent JFC of the NaOH and 5g/L of 25g/L, and 100 DEG C of water-baths impregnate 1h, and bath raio is
20:1, dipping take out be washed with deionized water to neutrality after the completion, be dried for standby；
Step 2: by after pre-treatment the spunbond non-woven cloth of PET (first layer) and PET melt-blow nonwoven (second layer) it
Between carry out interlayer bonding it is compound, specifically, using point a bonding mode carry out it is compound, it is spunbond in PET according to vertical, horizontal interval 3cm
A coating adhesive is uniformly spread on non-woven cloth, is covered with PET melt-blow nonwoven, and is placed it in dry in 45 DEG C of baking oven
It is taken out after 75min, completes the compound of first layer and the second layer；
Step 3: wherein terylene needled felt plays the role of stress buffer by Modified Activated Carbon fiber lay down on terylene needled felt, prevent
Only the excessive structure to material of material pressure damages, and formed by catalytic active particles is continuously and uniformly sprayed to Modified Activated Carbon undulation degree
On material, it is then covered with one layer of modified Carbon fibe again, then place one layer of woven dacron, carries out hydraulic compacting, the temperature setting of hydraulic press
It is 50 DEG C, pressure 2MPa, is made composite filter layer of cloth (third layer)；Wherein, the fountain height of formed by catalytic active particles is modified Carbon fiber
The 10% of the quality of dimension, obtained composite filter layer of cloth with a thickness of 0.14mm；
Step 4: the composite filter layer of cloth is compounded in PET melt-blow nonwoven (second layer) using a bonding mode
Another surface is covered with specifically, uniformly spreading a coating adhesive on PET melt-blow nonwoven according to vertical, horizontal interval 3cm
Composite filter layer of cloth places it in 50 DEG C of baking oven and takes out after dry 65min, obtains high-efficiency air filtering material.
Embodiment 3
The preparation method of high-efficiency air filtering material, includes the following steps:
Step 1: pre-treatment is carried out to the spunbond non-woven cloth of PET, PET melt-blow nonwoven, specifically, being dipped in matter
Amount concentration is respectively in the mixed solution of the penetrating agent JFC of the NaOH and 5g/L of 25g/L, and 100 DEG C of water-baths impregnate 1h, and bath raio is
20:1, dipping take out be washed with deionized water to neutrality after the completion, be dried for standby；
Step 2: by after pre-treatment the spunbond non-woven cloth of PET (first layer) and PET melt-blow nonwoven (second layer) it
Between carry out interlayer bonding it is compound, specifically, using point a bonding mode carry out it is compound, it is spunbond in PET according to vertical, horizontal interval 3cm
A coating adhesive is uniformly spread on non-woven cloth, is covered with PET melt-blow nonwoven, and is placed it in dry in 45 DEG C of baking oven
It is taken out after 80min, completes the compound of first layer and the second layer；
Step 3: wherein terylene needled felt plays the role of stress buffer by Modified Activated Carbon fiber lay down on terylene needled felt, prevent
Only the excessive structure to material of material pressure damages, and formed by catalytic active particles is continuously and uniformly sprayed to Modified Activated Carbon undulation degree
On material, it is then covered with one layer of modified Carbon fibe again, then place one layer of woven dacron, carries out hydraulic compacting, the temperature setting of hydraulic press
It is 50 DEG C, pressure 2MPa, is made composite filter layer of cloth (third layer)；Wherein, the fountain height of formed by catalytic active particles is modified Carbon fiber
The 10% of the quality of dimension, obtained composite filter layer of cloth with a thickness of 0.15mm；
Step 4: the composite filter layer of cloth is compounded in PET melt-blow nonwoven (second layer) using a bonding mode
Another surface is covered with specifically, uniformly spreading a coating adhesive on PET melt-blow nonwoven according to vertical, horizontal interval 3cm
Composite filter layer of cloth places it in 50 DEG C of baking oven and takes out after dry 70min, obtains high-efficiency air filtering material.
Air filting material and common disposable breathing mask to embodiment 1-3 preparation do following strainability test:
The test method of filter efficiency is using the easy penetrating grain size method in European standard (EN1882-1:1998)
(MPPS), it selects the particle of 0.3um diameter to be filtered efficiency test, then by changing flow velocity and particle diameter, tests material
Material is to the relationship between the filter efficiency and flow velocity and filtration resistance of different-diameter particle, test result is as follows table:
It is found that the air filting material that the present invention is prepared reaches 68.6% or more to the filter efficiency of 0.3um particle,
Filtration resistance is in 138Pa hereinafter, having high filter efficiency.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to better explain the present invention
Principle and practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only
It is limited by claims and its full scope and equivalent.
Claims (5)
1. the preparation method of high-efficiency air filtering material, which comprises the steps of:
Step 1: pre-treatment is carried out to the spunbond non-woven cloth of PET, PET melt-blow nonwoven, specifically, it is dense to be dipped in quality
Degree is respectively in the mixed solution of the penetrating agent JFC of the NaOH and 5g/L of 25g/L, and 100 DEG C of water-baths impregnate 1h, bath raio 20:1,
It takes out and is washed with deionized water to neutrality after the completion of dipping, is dried for standby；
Wherein, the spunbond non-woven cloth of the PET with a thickness of 0.34-0.4mm, the PET melt-blow nonwoven with a thickness of
0.3-0.35mm；
Step 2: by the spunbond non-woven cloth of PET after pre-treatment and between PET melt-blow nonwoven carry out interlayer bonding it is compound,
Specifically, it is compound to use a point bonding mode to carry out, spot printing is uniformly spread on the spunbond non-woven cloth of PET according to vertical, horizontal interval 3cm
Cloth binder is covered with PET melt-blow nonwoven, and places it in 45 DEG C of baking oven and take out after dry 70-80min, completes PET
Spunbond non-woven cloth and PET melt-blow nonwoven it is compound；
Step 3: formed by catalytic active particles is continuously and uniformly sprayed at Modified Activated Carbon by Modified Activated Carbon fiber lay down on terylene needled felt
On fibrous material, it is then covered with one layer of modified Carbon fibe again, then place one layer of woven dacron, carries out hydraulic compacting, the temperature of hydraulic press
Degree is set as 50 DEG C, pressure 2MPa, and composite filter layer of cloth is made；Wherein, the fountain height of formed by catalytic active particles is modified Carbon fibe
Quality 10%, obtained composite filter layer of cloth with a thickness of 0.12-0.15mm；
Step 4: the composite filter layer of cloth to be compounded in another surface of PET melt-blow nonwoven using bonding mode, specifically
, a coating adhesive is uniformly spread on PET melt-blow nonwoven according to vertical, horizontal interval 3cm, is covered with composite filter layer of cloth, it will
It is taken out after dry 60-70min in its baking oven for being placed on 50 DEG C, obtains high-efficiency air filtering material.
2. the preparation method of high-efficiency air filtering material according to claim 1, which is characterized in that the highly effective air mistake
Filter material material includes three layers, and first layer is the spunbond non-woven cloth of PET, and the second layer is PET melt-blow nonwoven, and third layer is composite filter
Layer of cloth passes through binder between three layers and binds.
3. the preparation method of high-efficiency air filtering material according to claim 1, which is characterized in that the binder is by such as
The preparation of lower section method:
It weighs guar gum to be added in distilled water, the heating stirring under 70-80 DEG C of water bath condition, add again after gelatin is completely dissolved
Enter carboxymethyl cellulose, continues stirring to dissolving, obtain binder；
Wherein, mass ratio used in guar gum, carboxymethyl cellulose and distilled water is 2:1:30.
4. the preparation method of high-efficiency air filtering material according to claim 1, which is characterized in that change described in step 3
Property Carbon fibe is made by the following method:
1) oxidization fiber is added in the concentrated nitric acid that mass fraction is 30% according to solid-liquid ratio 1g:15-20mL after impregnating 10min and is surpassed
Sound 30min, is cooled to room temperature, and filters and is washed oxidization fiber to neutrality with a large amount of deionized waters, is put in 130 DEG C of vacuum ovens
Middle dry 4h；
2) the precuring silk after drying is placed in tube furnace, in 80cm3The CO of/min flow velocity2With 10-15 DEG C/min's under gas
Heating rate is warming up to 900-1100 DEG C, and heat preservation activation 100-130min is cooled to room temperature, activated carbon fibre is made；
3) active carbon fibre Wesy acetone and deionized water are washed 3-4 times respectively, the dry 5-6h in 120 DEG C of vacuum ovens；
4) activated carbon fibre after drying is immersed in the NaOH solution of mass fraction 20%, drying is taken out after ultrasonic 10min,
The activated carbon fibre of drying is put into quartz ampoule again, in 100cm3The N of/min flow velocity2With the heating speed of 10 DEG C/min under atmosphere
Rate is warming up to 750-850 DEG C, keeps the temperature 3h, takes out, and is washed repeatedly with deionized water to neutrality, drying；
5) activated carbon fibre after drying above-mentioned steps is placed again into quartz ampoule, in 150cm3The NH of/min flow velocity3Under atmosphere
It is warming up to 780-820 DEG C with the heating rate of 5 DEG C/min, stops logical NH after keeping the temperature 90min3, in N2After being cooled to room temperature under atmosphere
It takes out, modified Carbon fibe is made.
5. the preparation method of high-efficiency air filtering material according to claim 4, which is characterized in that urged described in step 3
Change active particle to prepare by the following method:
It is that 1:19 will carry silver TiO according to mass ratio2Powder is mixed into P25 type TiO2It is then true under conditions of 90 DEG C in nano particle
It grinds and sieves with 100 mesh sieve after sky drying 3h, obtain formed by catalytic active particles；
Wherein, silver TiO is carried2The partial size of powder is 30nm.
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Denomination of invention: Preparation method of high-efficiency air filtration materials Effective date of registration: 20230912 Granted publication date: 20210820 Pledgee: Bank of China Limited Tianmen branch Pledgor: Hubei ZhuoLe medical supplies Co.,Ltd. Registration number: Y2023980056193 |