CN111481996B - Adsorption-enhanced filter material - Google Patents
Adsorption-enhanced filter material Download PDFInfo
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- CN111481996B CN111481996B CN202010337912.3A CN202010337912A CN111481996B CN 111481996 B CN111481996 B CN 111481996B CN 202010337912 A CN202010337912 A CN 202010337912A CN 111481996 B CN111481996 B CN 111481996B
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- filter material
- material body
- tourmaline
- filter
- fiber filament
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- 239000000463 material Substances 0.000 title claims abstract description 180
- 238000001179 sorption measurement Methods 0.000 title claims abstract description 27
- 229940070527 tourmaline Drugs 0.000 claims abstract description 72
- 229910052613 tourmaline Inorganic materials 0.000 claims abstract description 72
- 239000011032 tourmaline Substances 0.000 claims abstract description 72
- 238000000034 method Methods 0.000 claims abstract description 47
- 239000000835 fiber Substances 0.000 claims abstract description 46
- 230000003746 surface roughness Effects 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 26
- 238000005507 spraying Methods 0.000 claims description 26
- 238000000576 coating method Methods 0.000 claims description 21
- 229920001155 polypropylene Polymers 0.000 claims description 17
- 239000011248 coating agent Substances 0.000 claims description 16
- 239000000843 powder Substances 0.000 claims description 10
- 238000003860 storage Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- 239000002270 dispersing agent Substances 0.000 claims description 8
- 239000004088 foaming agent Substances 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 6
- 239000006260 foam Substances 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 5
- 238000007761 roller coating Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 4
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical group [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 3
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 3
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Polymers [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 3
- 230000000274 adsorptive effect Effects 0.000 claims 8
- 230000000694 effects Effects 0.000 abstract description 10
- 239000011148 porous material Substances 0.000 abstract description 5
- 229920000642 polymer Polymers 0.000 abstract description 4
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 abstract 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 abstract 2
- 239000004743 Polypropylene Substances 0.000 description 9
- -1 polypropylene Polymers 0.000 description 9
- 239000011347 resin Substances 0.000 description 9
- 229920005989 resin Polymers 0.000 description 9
- 239000000443 aerosol Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000004745 nonwoven fabric Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000009987 spinning Methods 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000416 bismuth oxide Inorganic materials 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920002620 polyvinyl fluoride Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
-
- 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
- D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/56—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 by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple fibres
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B1/00—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating
- D06B1/02—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating by spraying or projecting
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B1/00—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating
- D06B1/10—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating by contact with a member carrying the treating material
- D06B1/14—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating by contact with a member carrying the treating material with a roller
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/80—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with boron or compounds thereof, e.g. borides
- D06M11/81—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with boron or compounds thereof, e.g. borides with boron; with boron halides; with fluoroborates
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/18—Synthetic fibres consisting of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/20—Polyalkenes, polymers or copolymers of compounds with alkenyl groups bonded to aromatic groups
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Materials (AREA)
Abstract
The invention relates to an adsorption enhanced filter material, which mainly solves the problem of poor adsorption effect of the filter material in the prior art, and comprises a filter material body, wherein the filter material body comprises a first fiber filament and a second fiber filament, wherein the content of the propylene-based polymer forming the first filaments is 65 wt% to 73 wt%, the content of the propylene-based polymer forming the second filaments is 27 wt% to 35 wt%, the diameter size of the first filaments is 2.3 μm to 5 μm, the diameter of the second fiber filament is 3-7 μm, the filter material body has a gap with a pore diameter of 0.5-30 μm, and the surface has a rough structure, the surface roughness Ra of the filter material is 0.2-16 mu m, the tourmaline material is attached to the surface groove structure or the gaps of the filter material body by a dry attachment process or a wet attachment process, and the content of the tourmaline material on the filter material body is 0.01-3 g/square meter.
Description
Technical Field
The invention relates to an adsorption enhanced filter material.
Background
Currently, to prevent a user from inhaling airborne contaminants, respirators are typically worn over the nose and mouth of the user. While filters with electrical charges are commonly used as filters in respirators, particles carried in the fluid are captured by the filter as the fluid passes through the filter, and these charges enhance the ability of the filter to capture particles suspended in the fluid. Most of the filters used in respirators currently on the market are nonwoven fabrics, including those comprising non-woven fabrics composed of insulating polymers, non-conductive polymers, charged insulation, commonly referred to as "electrets", and as the industry develops, a variety of techniques have been developed to produce such products.
In early references to electrically charged filters, the poly (vinyl fluoride) polymer sheet was charged by applying a voltage to the sheet using a conductive liquid in contact with the surface of the sheet. Because of poor charge adhesion, the electrostatic failure of the high voltage electret treatment is fast, and needs to be stored in a sealed manner, and the failure after the sealing is opened is maintained about 4 hours.
Later on, by doping the melt-blown fibers with electrically charged particles in the filter manufacturing process, specifically, for example, CA2252516C, by doping the melt-blown fibers with ferroelectric materials (perovskite, tungsten bronze, bismuth oxide layered material and pyrochlore), the fibers can be made to have certain trends by thermal polarization, and the fibers are electrically charged, but the electret stability is relatively poor, so that, for example, JP2002309099AI, by doping the melt-blown fibers with weather-resistant modifiers such as hindered amine groups, oxygen-containing hindered phenol groups and the like, the electret stability is improved, while the existing blend spinning by doping the melt-blown fibers with tourmaline materials can prolong the adsorption capability and stability of charges, but the blending spinning by tourmaline into the fibers can cause non-uniform spinning and large pore size difference, so that the particles in the fluid mostly pass through large pores and the filtering efficiency cannot be effectively improved.
Disclosure of Invention
Therefore, aiming at the problems, the invention provides an adsorption enhanced filter material, which mainly solves the problem of poor adsorption effect of the filter material in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme: an adsorption enhanced filter material comprises a filter material body, wherein the filter material body comprises a first fiber filament material and a second fiber filament material which are made of propylene polymers with the same components and form a first fiber filament and a second fiber filament with different diameters through a melt-blowing die, the content of the propylene polymer forming the first fiber filament is 65 wt% -73 wt%, the content of the propylene polymer forming the second fiber filament is 27 wt% -35 wt%, the diameter of the first fiber filament is 2.3 mu m-5 mu m, the diameter of the second fiber filament is 3 mu m-7 mu m, the filter material body is provided with a gap with a pore size of 0.5 mu m-30 mu m and a surface with a concave-convex rough structure, the surface roughness Ra of the gap is 0.2 mu m-16 mu m, tourmaline material is attached to the filter material body in a surface groove structure or a gap through a dry attachment process or a wet attachment process, the content of the tourmaline material on the filter material body is 0.01 g/square meter to 3 g/square meter.
Further, the dry attachment process comprises the following steps:
a. putting the filter material body on a conveying device for conveying;
b. a charging barrel is arranged at the upper side of the filter material body, tourmaline material powder is filled in the charging barrel, blanking is carried out through the charging barrel, the particle size of the tourmaline material is 0.2-15 μm, and a dispersing pipeline for guiding flow is arranged between a discharge port of the charging barrel and the filter material body;
c. the negative pressure adsorption device is arranged at the lower side of the filter material body, and the flow velocity of the gas in the dispersion pipeline is 0.5-10 m/s under the action of the negative pressure adsorption device.
Furthermore, in the step a, static charges are attached to the filter material body by friction charging or corona charging and discharging during conveying of the filter material body.
Further, the wet adhesion process is a roller coating process or a spraying process.
Further, the roller coating process comprises the following steps:
d. putting the filter material body on a conveying device for conveying;
e. a liquid storage tank is arranged at the lower side of the filter material body, the liquid storage tank is internally provided with a tourmaline material liquid, a coating roller is arranged in the liquid storage tank, an extrusion roller is arranged at the upper side of the filter material body, and the filter material body passes through the coating roller and the extrusion roller during conveying;
f. The filter material body is coated by a coating roller and then enters an oven for drying.
Further, the spraying process comprises the following steps:
g. putting the filter material body on a conveying device for conveying;
h. a spraying device is arranged on one side of the filter material body, and tourmaline material liquid is filled in the spraying device and sprayed on the filter material body through the spraying device;
i. the filter material body enters the drying oven to be dried after being sprayed.
Furthermore, in the step h, a foaming agent can be mixed in the tourmaline material liquid, the content of the foaming agent is 0.1-0.5%, and a scraper is arranged to scrape the foam formed by spraying of the spraying device.
Further, the tourmaline material liquid comprises 1% -20% of a tourmaline material, 1% -20% of a dispersant and 60% -98% of water.
Further, the dispersing agent is sodium hexametaphosphate, ethanol, polyacrylate and triethanolamine.
By adopting the technical scheme, the invention has the beneficial effects that: the adsorption enhanced filter material forms a filter material body with a surface concave-convex structure and gaps with the aperture of 15-30 mu m by melt-blowing the first fiber yarns and the second fiber yarns with different diameters and sizes, and attaches tourmaline materials to groove structures or gaps on the surface of the filter material body by combining a dry attachment process or a wet attachment process, so that the filter material body forms electrets, and tourmaline materials can be well attached to the filter material body, the content of the tourmaline materials is 0.01 g/square meter to 3 g/square meter, the electric charge exposed to the outside is stronger compared with that of the tourmaline materials mixed into a propylene polymer material, the maintenance time is longer, the adsorption effect is good, and the tourmaline materials are difficult to drop in the subsequent processing process, compared with the prior art, the adsorption enhanced filter material ensures that the gap structure of the filter material body is not damaged under the condition of adding the tourmaline materials, and improves the filterability, and avoid because the hardness of tourmaline material is great relatively, cause wearing and tearing to contact equipment, mix into the main material, reduce the problem in the life-span of spinneret, simultaneously, combine the simple technology of adhering to the tourmaline material through the structure on the filter media body for machining efficiency improves greatly.
Drawings
FIG. 1 is a schematic cross-sectional view of a filter body according to an embodiment of the present invention;
FIG. 2 is a process flow diagram of a dry attach process in an embodiment of the invention;
FIG. 3 is a process flow diagram of a roll coating process in an embodiment of the invention;
FIG. 4 is a schematic view of the structure of a coating roller in an embodiment of the present invention;
FIG. 5 is a process flow diagram of an aerosol spray process in an embodiment of the invention;
FIG. 6 is a process flow diagram of a foam blade coating process in an example of the present invention.
Detailed Description
The invention will now be further described with reference to the accompanying drawings and detailed description.
The embodiment of the invention is as follows:
referring to fig. 1, an adsorption enhanced filter material includes a filter material body 1, the filter material body 1 includes a first fiber filament material and a second fiber filament material separated by a high melt index polypropylene resin, which are respectively communicated and ejected through two melt blowing dies to form a first fiber filament 21 and a second fiber filament 22 with different diameters, the first fiber filament 21 and the second fiber filament 22 are randomly arranged to form a fiber mesh structure, and then are reinforced by mechanical, thermal bonding or chemical methods, preferably chemical methods, so that a non-woven fabric with roughness on the surface is formed, the groove of the non-woven fabric can maintain the original structure, and the space formed by the first fiber filament 21 and the second fiber filament 22 in the gap in a staggered manner is in a spread state to prevent the space from being damaged in hot pressing or mechanical reinforcement, wherein the content of the high melt index polypropylene resin forming the first fiber filament 21 is 65 wt% to 73 wt%, the content of the high melt index polypropylene resin forming the second filament 22 is 27 wt% to 35 wt%, the diameter of the first filament 21 is 2.3 μm to 5 μm, the diameter of the second filament 22 is 3 μm to 7 μm, when the content of the high melt index polypropylene resin forming the first filament 21 is close to the content of the high melt index polypropylene resin forming the second filament 22, the surface thereof can form uniformly distributed grooves, but the depth of the grooves is relatively small, so that the surface roughness is small, which is not favorable for the adhesion of the tourmaline material 20, and when the content of the high melt index polypropylene resin forming the first filament 21 is relatively large, the area thereof laid on the surface is large, which is also not favorable for the adhesion of the tourmaline material 20, of course, the depth of the grooves in the surface roughness is also determined by the diameter of the first filament 21 and the second filament 22, when the diameter size difference is large, the depth of the groove can be increased, and the air formed by the first filament 21 and the second filament 22 alternately at the peripheral edge forming the gap 23 can provide a good effect of capturing the tourmaline material 20, so that it is preferable in this embodiment that the content of the high melt index polypropylene resin forming the first filament 21 is 67 wt%, the content of the high melt index polypropylene resin forming the second filament 22 is 33 wt%, the diameter size of the first filament 21 is 3 μm, the diameter size of the second filament 22 is 6 μm, and it can be ensured that the depth of the groove in the surface roughness plays a role of capturing the tourmaline material 20 and is fixed, the filter material body 1 has the voids 23 with the pore diameter of 0.5 μm to 30 μm, and the surface has the rough structure with the surface roughness Ra of 0.2 μm to 16 μm, the tourmaline material 20 is attached to the surface groove structure or the gaps 23 of the filter material body 1 through a dry attachment process or a wet attachment process on the filter material body 1, the content of the tourmaline material 20 on the filter material body 1 is 0.01 g/square meter to 3 g/square meter, the content of the tourmaline material 20 on the filter material body 1 has a range value, the surface roughness and the gap 23 size of each area formed under the condition that the first fiber yarns 21 and the second fiber yarns 22 are randomly sprayed are different, so that the content of the tourmaline material 20 captured by the filter material body 1 is different, but the structure capable of capturing the tourmaline material 20 better is formed through the diameter sizes of the first fiber yarns 21 and the second fiber yarns 22 and the content of the high-melt-index polypropylene resin between the first fiber yarns 21 and the second fiber yarns, and the surface roughness and the gap 23 size of the filter material body 1 can be distributed uniformly and have fixed sizes, forming a better function of catching the tourmaline material 20, thereby improving the filtering effect in the using process.
The filter material body 1 formed in the way is subjected to temperature pretreatment, namely is placed in an environment test box at 70 ℃ for 24 hours, then is placed in an annular test box at-30 ℃ for 24 hours, finally is placed at room temperature for 5 hours, and is subjected to radial filtration test under the gas flow of 85L/min, the median diameter of sodium chloride aerosol particle size distribution particles used under the pressure applying condition is 0.09 mu m, and the measured filtration efficiency is more than 99%.
And the dry-type adhesion technology or the wet-type adhesion technology that use all can follow-up make tourmaline material 20 fine adhere to on the filter media body, and can guarantee that the content of tourmaline material 20 is in 0.01 g/square meter 3 g/square meter range value on the filter media body 1, make the filter effect of filter media body 1 obtain promoting, quality and production facility's life in 1 production process of filter media body have promptly been guaranteed, and can make the stability of tourmaline material 20 attached to on filter media body 1, promote the utilization ratio of tourmaline material 20 on filter media body 1, thereby improve the filter effect, specifically as follows:
referring to fig. 2, the dry attach process includes the steps of:
a. the filter material body 1 is placed on a conveying device 2 for conveying;
b. A charging barrel 3 is arranged at the upper side of the filter material body 1, tourmaline material powder 4 is filled in the charging barrel 3, blanking is carried out through the charging barrel 3, the particle size of the tourmaline powder 4 is 0.8 mu m, a dispersing pipeline 5 for guiding flow is arranged between a discharge port of the charging barrel 3 and the filter material body 1, the dispersing pipeline 5 is provided with an inlet and an outlet, the central axis of the inlet and the central axis of the outlet are distributed in the longitudinal direction and are positioned on the same straight line, and the diameter size of the inlet is smaller than that of the outlet;
c. the lower side of the filter material body 1 is provided with a negative pressure adsorption device 6, the negative pressure adsorption device 6 is a negative pressure adsorption roller, the outlet of the dispersion pipeline 5 is covered on the negative pressure adsorption device 6, and the flow velocity of the gas in the dispersion pipeline 5 is 4m/s under the action of the negative pressure adsorption device 6.
The negative pressure that produces at negative pressure adsorption equipment 6 adsorbs filter media body 1, the space on the filter media body 1 makes to produce decurrent gas flow in the dispersion pipe 5 simultaneously, tourmaline powder 4 that goes out from feed cylinder 3 unloading can evenly distributed on the filter media body 1 that is located dispersion pipe 5 under the air current drives, and under the adsorption affinity, card that tourmaline powder 4 can be fine is in the clearance department or the surperficial recess of filter media body 1 to adhere to on the surface.
Certainly, in the step a, the filter material body 1 is attached with static charges by a friction charging or corona charging and discharging method during conveying, so that the filter material body 1 can form certain charges to adsorb the tourmaline powder 4 at this time, and the tourmaline powder is made to be uniform on the surface of the filter material body 1, and can be conveyed by clamping the filter material body through two optical rods after the step c, so that the tourmaline powder 4 is better attached to the filter material body 1, and certainly, the two optical rods need to be subjected to electrostatic treatment, and the tourmaline powder 4 is prevented from being adsorbed.
The wet adhesion process is a roller coating process or a spraying process.
Referring to fig. 3, the roll coating process includes the steps of:
d. the filter material body 1 is placed on a conveying device 2 for conveying;
e. a liquid storage tank 7 is arranged at the lower side of the filter material body 1, a tourmaline material liquid 8 is placed in the liquid storage tank 7, the tourmaline material liquid 8 comprises 12% of tourmaline materials, 12% of dispersing agents and 76% of water, a coating roller 9 is arranged in the liquid storage tank 8, a squeezing roller 10 is arranged at the upper side of the filter material body 1, and the filter material body 1 passes through the space between the coating roller 9 and the squeezing roller 10 during conveying;
f. the filter material body 1 is coated by a coating roller 9 and then enters an oven 11 for drying.
The spraying process is an aerosol spraying process or a foam blade coating process.
Referring to fig. 4, the coating roller 9 is provided with a roller body 91, fourteen long grooves 92 are formed in the roller body 91 along the axial direction of the roller body, the coating roller 9 is sleeved with a coating sleeve 93, and the long grooves 92 are arranged so that the coating roller 9 can store more tourmaline material liquids 9 when rotating and immersing into the liquid storage tank 7, so that the coating sleeve 93 is sufficiently coated on the filter material body 1 in the contact process of the filter material body 1, the coating effect is improved, and the tourmaline material is attached to the filter material body with a good effect.
Referring to fig. 5, the aerosol spray process includes the following steps:
g. the filter material body 1 is placed on a conveying device 2 for conveying;
h. a spraying device 12 is arranged on one side of the filter material body 1, a tourmaline material liquid 8 is filled in the spraying device 12, and the tourmaline material liquid 8 comprises a tourmaline material 12%, a dispersing agent 12% and water 76% and is sprayed on the filter material body 1 through the spraying device 12;
i. the filter material body 1 enters the drying oven 11 for drying after being sprayed.
Referring to fig. 6, the foam blade coating process includes the following steps:
j. the filter material body 1 is placed on a conveying device 2 for conveying;
k. A spraying device 12 is arranged on one side of the filter material body 1, a tourmaline material liquid 8 and a foaming agent are filled in the spraying device 12, the spraying device 12 comprises 12% of a tourmaline material, 12% of a dispersing agent, 75.7% of water and 0.3% of a foaming agent, the tourmaline material liquid and the foaming agent are sprayed on the filter material body 1 through the spraying device 12, and a scraper 13 is arranged to scrape foam formed by spraying of the spraying device 12;
and l, the filter material body 1 enters the drying oven 11 for drying after being sprayed.
The dispersant is one of sodium hexametaphosphate, ethanol, polyacrylate and triethanolamine.
The working mode of the invention is as follows: the adsorption enhanced filter material forms a filter material body 1 with a surface concave-convex structure and gaps with the aperture of 15-30 mu m by melt-blowing first fiber filaments 21 and second fiber filaments 22 with different diameters and sizes, and attaches tourmaline materials to groove structures or gaps 23 on the surface of the filter material body 1 by combining a dry attachment process or a wet attachment process, so that the filter material body 1 forms electrets, and the tourmaline materials 20 can be well attached to the filter material body 1, the content of the tourmaline materials is 0.01 g/square meter to 3 g/square meter, compared with the content of the tourmaline materials mixed in propylene polymer materials, the electric charges exposed to the outside are stronger, the maintaining time is longer, the adsorption effect is good, and the tourmaline materials are difficult to drop in the subsequent processing process, compared with the prior art, the gap 23 structure of the filter material body 1 is ensured not to be damaged under the condition of no added tourmaline materials 20, the filterability is improved, and the problem that the service life of a spinneret plate is shortened due to the fact that the hardness of the tourmaline material 20 is relatively large and abrasion is caused to contact equipment and main materials are mixed is avoided, and meanwhile, the simple process of attaching the tourmaline material 20 is combined through the structure on the filter material body 1, so that the processing efficiency is greatly improved.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. An adsorption-enhanced filter material is characterized in that: comprises a filter material body, wherein the filter material body comprises a first fiber filament material and a second fiber filament material which are made of propylene polymers with the same components and are formed into a first fiber filament and a second fiber filament with different diameters and sizes through a melt-blowing die, wherein the content of the propylene polymer forming the first fiber filament is 65-73 wt%, the content of the propylene polymer forming the second fiber filament is 27-35 wt%, the diameter size of the first fiber filament is 2.3-5 mu m, the diameter size of the second fiber filament is 3-7 mu m, the filter material body is provided with a gap with the aperture of 0.5-30 mu m and a surface with a concave-convex rough structure, the surface roughness Ra of the gap is 0.2-16 mu m, and tourmaline materials are attached to the surface groove structure or the gap of the filter material body through a dry attachment process or a wet attachment process, the content of the tourmaline material on the filter material body is 0.01 g/square meter to 3 g/square meter.
2. The adsorptive enhancement filter of claim 1, wherein: the dry attachment process comprises the following steps:
a. putting the filter material body on a conveying device for conveying;
b. a charging barrel is arranged at the upper side of the filter material body, tourmaline material powder is filled in the charging barrel, blanking is carried out through the charging barrel, the particle size of the tourmaline material is 0.2-15 μm, and a dispersing pipeline for guiding flow is arranged between a discharge port of the charging barrel and the filter material body;
c. the negative pressure adsorption device is arranged on the lower side of the filter material body, the flow velocity of gas in the dispersion pipeline is 0.5-10 m/s under the action of the negative pressure adsorption device, and the content of the tourmaline material on the filter material body is 0.01-3 g/square meter.
3. The adsorptive enhancement filter of claim 2 wherein: in the step a, static charges are attached to the filter material body by a friction charging or corona charging and discharging method during conveying of the filter material body.
4. The adsorptive enhancement filter of claim 1, wherein: the wet adhesion process is a roller coating process or a spraying process.
5. The adsorptive enhancement filter of claim 4 wherein: the roller coating process comprises the following steps:
d. Putting the filter material body on a conveying device for conveying;
e. a liquid storage tank is arranged at the lower side of the filter material body, the liquid storage tank is internally provided with a tourmaline material liquid, a coating roller is arranged in the liquid storage tank, an extrusion roller is arranged at the upper side of the filter material body, and the filter material body passes through the coating roller and the extrusion roller during conveying;
f. the filter material body is coated by a coating roller and then enters an oven for drying.
6. The adsorptive enhancement filter of claim 4 wherein: the spraying process comprises the following steps:
g. putting the filter material body on a conveying device for conveying;
h. a spraying device is arranged on one side of the filter material body, and tourmaline material liquid is filled in the spraying device and sprayed on the filter material body through the spraying device;
i. the filter material body enters the drying oven to be dried after being sprayed.
7. The adsorptive enhancement filter of claim 6 wherein: in the step h, a foaming agent can be mixed in the tourmaline material liquid, the content of the foaming agent is 0.1-0.5%, and a scraper is arranged to scrape the foam formed by spraying of the spraying device.
8. The adsorptive enhancement filter of any one of claims 5 to 7, wherein: the tourmaline material liquid comprises 1-20% of a tourmaline material, 1-20% of a dispersant and 60-98% of water.
9. The adsorptive enhancement filter of claim 8 wherein: the dispersant is sodium hexametaphosphate, ethanol, polyacrylate and triethanolamine.
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