Filtering and sorbing material
FIELD: means of protection.
SUBSTANCE: invention relates to production of a filtering and sorbing material used in the means of personal respiratory protective equipment to cleanse the air form fumes and aerosols of hazardous substances. The filtering and sorbing material containing polypropylene fibers filled with microatomised carbon, fibers of sulfate unbleached cellulose and fibers of mercerised cellulose is obtained by adding the polypropylene fibers in the amount 5-10% of the total mass at the stage of grinding the sulfate unbleached cellulose after which combined grinding of the mixture is continued until the grinding degree of 28±2°SHR is reached, the mixture is then mixed with the fibers of mercerised cellulose and carbon, paper web is poured dried and treated with an impregnating solution containing nickel chloride (II) - 10%, ferrous chloride (III) - 10%, copper chloride (II) - 10%.
EFFECT: production of elestic well draped filtering and sorbing material with high mechanical and adsorbtion characteristics and a low aerodynamic resistance to respiration.
1 tbl, 1 dwg
The invention relates to industry pulp and paper industry, in particular the production of filtersource material used in the means of individual protection of respiratory organs (RPE) for treatment of air, vapors, and aerosols of chemical substances (EROTIC), namely ammonia, chlorine, hydrogen cyanide, CYANOGEN, amine, compounds of thioethers (sulfides), etc.
Known filter material for respiratory protection mainly from toxic airborne substances (patent RU 2151628 S1). Composition for the manufacture of filter material comprises a mixture of super fine grain glass fibers of various diameters, cotton cellulose and activated carbon in the amount of 20-30 wt.%.
The main disadvantages of the filter material on the basis of super fine grain glass fibers is significant resistance to air flow (from 63 to 74 PA)that do not meet modern requirements to the RPE, and the lack of sorption capacity of the material in the introduction of sorbent from 20 to 30 wt.%.
Also known filtersarray element made in the form of facial masks and consisting of stacked layers. Filtersarray element contains layers of woven and non-woven activated carbon fibers. The layers are separated from each other by particles containing thermoplastic material, n is an example of polyvinyl chloride, polyethylene and activated carbon, and is connected to at least one of the adjacent layers. Filtersarray element may have a layer of glass fiber as a reinforcing - mesh canvas cotton (application No. 1476761, UK, MCI 01D 46/00, 48/10, 46/52).
Used in this facial mask as adsorption layer of the adsorption fabric of activated carbon fibers characterized by high sorption properties. However, this fabric has a low strength, which complicates its use in the manufacture of laminated materials, and significant cost adsorption fabric unacceptable when creating ripm wide application in conditions of disaster.
Besides the weak side of this facial mask is the consolidation of the sorbent (activated carbon) using polymer compounds, which leads to the loss of sorption capacity and a sharp decrease in physiological and hygienic properties.
Closest to the proposed material to the technical essence and the achieved result is filtersarray material (prototype) for personal respiratory protection against vapors and aerosols EROTIC containing cellulose fibers, filled with fine activated carbon and sized binder (patent RU 2281798 C2).
A method of manufacturing this material includes himself preparation of the composition of a mixture of pulp unbleached sulphate with the degree of grinding of 28±2°SR and mercerized cellulose with the introduction of the mass of activated carbon blending, the sizing composition of the binder, the sheen of the material and drying it.
The main disadvantages of sorbing material of the prototype is its lack of strength and elasticity, which in practice reduces the life of the finished products - respirators, protective hoods and other respiratory devices.
In addition, despite the large range of hazardous chemicals, from which this material provides protection when using it in the RPE remains an open question provide protection against sulfur-containing compounds, in particular compounds of thioethers (sulfides).
Technical result achieved in the claimed invention is to obtain a flexible, well-kupiruema filterservice material for ripm with high physical-mechanical and adsorption properties at low aerodynamic resistance to breathing.
Filtersarray material made known in the pulp and paper industry by way of unbleached sulphate pulp with the introduction of a mass of fine coal and binder.
According to the proposed method of obtaining material the problem is solved by the introduction at the stage of grinding unbleached sulphate pulp (degree of grinding of 20±2°SR) polymer fibers in an amount of 5...10% of the total mass of the composition is ultrasaurus material. Then continue grinding until 28±2°SR.
High adsorption properties filterservice material is provided by using as the absorbent (up to 45 wt.%) mechanical mixture of fine coal-catalyst KT and gas coal type SKT, distributed and recorded in the amount of material in the volume of coal-catalyst type CT to the volume of gas coal type SKT how to 1.15:3,5, or as 3:1, and the processing of the paper web impregnating solution containing a mixture of catalysts and chemo-sorbents on the basis of halides of metals of variable valence - chloride Nickel (II), iron (III), copper (II).
The difference of the invention from known is:
1. The presence in the composition filterservice material polymer (polypropylene) fibers, adding which occurs at the stage of grinding unbleached sulphate pulp.
2. Impregnation filterservice material with a solution of a mixture of catalysts and chemo-sorbents on the basis of halides of metals of variable valence.
Adding in the composition of polypropylene fibers at the stage of grinding unbleached sulphate pulp is very important, as this provides a good tachycardia polymer fibers (splitting on thinner fibrils) and the uniform distribution in coal-cellulosic mA the CE. Joint with pulp refining polymer fibers on the degree of grinding of 20±2 to 28±2°SR was possible to optimize the process of their introduction upon receipt filterservice material.
With the introduction of polymer fibers in roll simultaneously with unbleached sulphate pulp from the start grinding (the degree of grinding 15...16°SR) and joint grinding to achieve the degree of grinding of 28±2°SR significantly increased the density of the material and, accordingly, the aerodynamic resistance to air flow, which is unacceptable for ripm.
The introduction of polymer fibers at the end of the grinding does not allow the fibers evenly distributed in the coal-cellulose mass. When this fiber distributed beams, which leads to sticking of the leaf to the hot surface when thermoplastically and, in General, degrades the quality filterservice material.
Impregnation filterservice material with a solution of a mixture of catalysts and chemo-sorbents on the basis of halides of metals of variable valency allows us to give the material a high sorption properties with respect to the pairs of compounds thioesters. It is known that due to the unsaturation of the sulfur atom of the sulfide can form with halides of metals of variable valence complex compounds, representing crystalline products which are not soluble in water. This exacerbated the government allows us to consider the halides of metals of variable valency as the active chemo-sorbents for vapor recovery thioesters.
Impregnation filterservice material, the concept of which is shown in the drawing, was carried out in a drying section of paper machine Voith ebb coal-cellulose composition, a weak pressing and drying at a temperature of 80...95°C. Leaf material (1), passing through the right rollers (2), is fed into the impregnation zone (3) impregnating refreny shaft (4)which rotates the canvas material due to tension, and then to the drying cylinder (5). The volume of the impregnating solution in the impregnation bath (6) is 7 liters, the concentration of the impregnating solution - 30%, including: chloride Nickel (II) - 10%, iron chloride (III) is 10%, the chloride copper (II) - 10%. In the impregnation weight of catalysts on filtrasorb the material is about 3%.
Then the material is subjected thermoplastically on smooth hot cylinder heated at a temperature of 180...200°C and a minimum pressure of 0.1...0.2 kgf/cm2. The main objective of thermoplastically at minimum pressure (0.1...0.2 kgf/cm2- warm up without the pressure of the compressed fabric material up to 180...200°C, thereby creating the conditions for binding of the hot-melt fibers. When this material is given elasticity, flexibility, good drape, which is very important for the manufacture of respiratory devices of various configurations of respirators, Capu the ones etc.
Used in the manufacture of filtersource material added to the composition of polymer fibers at the stage of grinding unbleached sulfate pulp, and the impregnation of the material with a solution of a mixture of catalysts and chemo-sorbents on the basis of halides of metals of variable valence of scientific and technical literature authors unknown.
The evaluation of the properties of the proposed sample filterservice material was carried out according to approved methods.
Time of protective action pairs ammonia, chlorine, hydrazine, dimethylamine and thioesters were determined on a model package of materials of the following composition:
the covering layer;
As a sorption layer was tested in a sample of the proposed material.
The results of the tests of protective and physico-mechanical properties of the inventive material, as well as the values of the relevant material properties of the prototype are given in the table.
Due to the fact that the composition of the material of the prototype may contain different proportions of components (see the description of the material of the prototype), for comparison characteristics in the table for the material of the prototype shows the interval of possible values.
|Protective and physico-mechanical properties filtersarray materials|
|The indicators characterizing the prototype and the claimed material||Material-prototype||Declare filtersarray material|
|The mass of 1 m, g||127...131||129|
|Thickness, mm||0,49 0,46...||0,49|
|Destructive force when stretching in the machine direction, N||7,7...12,2||14,5|
|Resistance to airflow, PA||...3,9 2,9||3,0|
|Time of protective action pairs EROTIC, min,|
|dimethyldisulfide||Less than 10||31|
|tylenchid||Less than 10||28|
|Time of protective action pairs EROTIC, min,|
|material after 120 hours operating socks:|
|1. Acting concentration EROTIC, mg·l-1taken in accordance with GOST R 22.9.09.-05:|
|chlorine - 0,36;|
|dimethylamine - 0,2;|
|hydrazine - 0,04.|
|2. Influencing the concentration of dimethyl sulfide and tylenchida was 0.1 mg·l-1.|
|3. "----" indicates no data.|
As follows from the table, filterservice materials have similar values of mass 1 m, thickness and resistance to breathing. While the claimed material is characterized by a higher strength properties and provides effective protection against vapors EROTIC. When this protective properties of pairs of ammonia, chlorine, hydrazine, dimethylamine claimed material is at the level of the prototype, and pairs of thioethers is much superior. In addition, it should be noted that the inventive material retains its protective properties (with a small decrease) and after performance socks for 120 hours, which indicates a high physico-mechanical properties and good elasticity.
The main advantage of the proposed invention is to provide a flexible, well-kupiruema filterservice material for ripm with high mechanical and adsorbs nimi properties at low aerodynamic resistance to breathing. The use of non-selective sorbent reinforced catalysts and sorbents on the basis of the chlorides of Nickel (II), iron (III), copper (II), provides high adsorption properties, and the introduction of coal-cellulose composition polypropylene fibers at the stage of grinding unbleached sulphate pulp provides high mechanical properties claimed filterservice material.
The method of obtaining filterservice material to clean the air of harmful gases, vapors and aerosols, including the refining of cellulose fibres unbleached sulfate to the degree of grinding of 28±2° SR, and their mixture with mercerized cellulose fibers, fine coal-catalyst KT and gas coal type SKT, low tide of the obtained composition and drying the obtained paper web, wherein upon reaching the degree of grinding of cellulose fibres unbleached sulfate equal to 20±2° SR, carry out the introduction of polypropylene fibers in the amount of 5-10% by weight of the total mix of substances and continue joint grinding to the degree of grinding of 28±2° SR, obtained after drying the paper web impregnated with a solution containing 10% of Nickel chloride (II), 10% iron chloride (III) and 10% copper chloride (II), followed by thermoplasticity.
SUBSTANCE: method involves as follows. Electroformed nonwoven fibrous polymer fabric is impregnated with aqueous or aqueous-alcoholic suspension of aluminium material particles then hydrolysed by heating the suspension impregnated fabric that is impregnated by suspension spraying over its surface. The heating process in performed in the open air at relative humidity at least 70%, preferentially 95-100% of at least two stacked suspension impregnated fabrics. Upon termination of hydrolysis process, plane parallel wringing of the fabrics follows.
EFFECT: improved performance of a sorbent owing to formation of the composite sheet sorbent involving uniform distribution of porous particles of oxide-hydroxide aluminium phases over the entire volume of the fabric, formation of the sheet sorbent fabric of uniform thickness and density.
7 cl, 2 ex, 1 tbl
FIELD: technological processes.
SUBSTANCE: invention is related to the field of fibrous filtering materials. Filtering material is suggested for respirators, which contains working layer of fibres with diametre of 1-10 mcm produced by method of electrostatic moulding from solution containing 6-16 wt % of polycarbonate in mixture of dissolvents that consists of dichloroethane and methylene chloride with their mass ratio of (1-5):(9-5), accordingly, and having surface density of 30-60 g/m2. Respirator is made with application of produced material.
EFFECT: improved mechanical strength of material and products on its basis.
4 cl, 1 dwg, 2 tbl
FIELD: technological processes.
SUBSTANCE: electret article comprising polymer material, which has electret charge given to it, besides, polymer material includes one or several types of heteroatoms, and coefficient of saturation with fluorine that represents ratio of atomic percentage ratio of fluorine relative to amount of saturated and unsaturated fluorine-containing groups, does not exceed approximately 200, moreover, atomic percentage content of fluorine makes at least approximately 40%. Article is used as filtering material in respirators, filters and face masks.
EFFECT: provision of high quality of material.
22 cl, 5 dwg, 8 tbl
FIELD: textile, paper.
SUBSTANCE: invention relates to fibrous filtering materials. Filtering fibrous material is proposed which is produced by electrostatic formation from a solution of polymer mixture - sterol copolymer with acrylonitrile and polyurethane with their weight relation of (50-95):(50-5) respectively, diametre of 1-10 mcm; the material is characterized by the unit area weight of 2070 g/m2 and aerodynamic resistance of 3-30 Pa under the air flow speed of 1 cm/s. Method of the material production and respiratory personal protective gear made from it are proposed as well.
EFFECT: providing for effective filtering material with improved physical and chemical parametres.
5 cl, 1 dwg, 2 tbl, 4 ex
SUBSTANCE: filter is made of nonwoven fabric and/or injected filter structures or sheets, i.e. produced after processing the synthetic artificial fibres. At first fibres are processed with antibacterial compounds and sliced to monothreads. Natural, artificial, synthetic, metal fibres or their mixtures are used. Web and felt are formed from these threads. Required number of nonwoven fabric layers is connected, thereafter processed, sliced and rolled.
EFFECT: extended application of aforesaid filters, improved wetting and filtering ability ensured.
31 cl, 16 dwg, 11 ex
FIELD: technological processes.
SUBSTANCE: invention is related to the field of fibrous filtering materials production. Materials are suggested from polystyrene and polymethyl methacrylate with fiber diameter of 1.5-3 mcm. Materials are produced by means of electrostatic moulding of fibres from polystyrene or polymethyl methacrylate solution in organic dissolvent, which is ethyl acetate or dichloroethane that have been previously purified till content of admixtures is not more than 0.001 wt %, at that polystyrene and polymethyl methacrylate prior to dissolution are purified till content of admixtures is not more than 0.01%, and electric moulding is realised in air medium, which is dust-free till particles content is not more than 0.01 mg/m3 and relative humidity of not more than 35%.
EFFECT: invention makes it possible to produce filtering easily-cindered materials that are efficient in analysis of gas mediums for inorganic aerosol admixtures.
3 cl, 1 tbl, 2 ex
FIELD: technological processes.
SUBSTANCE: group of inventions is related to production of sorbtion-filtering materials for purification of gases from organic and inorganic chemical substances. Filtering material contains at least two layers of base from nonwoven polymer fibrous material and particles of aluminium oxide hydrate fixed on fibres on one side of every layer surface, at that surfaces with fixed particles of aluminium oxide hydrate of two layers are folded towards each other, thus layer of aluminium oxide hydrate particles is created between mentioned layers of base, which has sorbtion properties. Material is produced by application of aluminium-based material particles on one side of nonwoven polymer fibrous material, subsequent folding of two such treated material cloths with treated surfaces towards each other and performance of hydrolysis with creation of layer of aluminium oxide hydrate particles between two cloths.
EFFECT: suggested filtering material has high sorbtion properties, high efficiency of air purification from contaminants of organic and inorganic origin and low aerodynamic resistance.
14 cl, 2 dwg, 2 tbl, 2 ex
SUBSTANCE: invention concerns application of polymerisates containing thermoplastic polymers, as filtering auxiliary and/or stabilising substances, and method of water fluid filtration and/or stabilisation. Water fluid filtration and/or stabilisation uses polymerisate in the form of polymer powder containing the following components, wt %: (a) 20 to 95 of at least one thermoplastic polyolefin and polyamide polymer, and (b) 80 to 5 of at least one substance selected out of group including silicates, carbonates, oxides, silica gel, kieselguhr, diatomite earth and linked polyvinyllactams and their mixes. Polymer powder is obtained by compounding of thermoplastic polymer (a) and substance (b) in extruder with physical and/or chemical interaction.
EFFECT: adjustable absorption by the use of insoluble, recoverable, chemically inert, slightly inflating polymerisates with large surface area.
26 cl, 2 tbl
FIELD: technological processes.
SUBSTANCE: invention is related to production of highly porous multi-layer polymer materials for manufacture of filtering elements, which are used for filtration of oil products, technological fluids, gases and water. Method includes fractional filling of form sections with powdery polyethylene, which are separated by at least two partitions, mechanical sealing, simultaneous sintering of form sections content into layers of porous one-piece filtering element, forced cooling, pressing-out of filtering element from form and mechanical processing. Filtering element contains at least three one-piece sintered open-porous layers made of different fractions of powdery polyethylene from the following group: ultrahigh molecular polyethylene and polyethylene that is radiation-modified by gamma radiation, with dimensions of pores from 1 to 200 micrometer. Neighbouring layers may be divided by partitions made of filtering paper.
EFFECT: increase of manufacturing process efficiency, increase of sorption capacity and durability of filtering element, possibility to produce thick-wall filtering elements of complex shape.
17 cl, 2 dwg
FIELD: engines and pumps.
SUBSTANCE: filter element for filter-separators is intended for clearing liquid and gaseous media of impurities and free moisture in the form of aerosols and may be used in petroleum refining and aircraft industries as well as in other industrial branches. The above filter incorporates a filtration and coagulation layers arranged streamwise the media being filtered and is made from thermoplastic polymer fibres, primarily from polypropylene. Note that coagulating layers are made from fine fibres and separated by a layer of coarse fibres, the density of coagulating layers on the side of the incoming medium to be filtered exceeding that on the outlet side.
EFFECT: simpler and cheaper filter design.
1 ex, 1 tbl, 2 cl
FIELD: methods of production of electret items, electret filters and respirators.
SUBSTANCE: the invention presents a method of production of electret items, electret filters and respirators with heightened resistivity to the oil mist. The invention falls into production processes of electret items, electret packed beds and respirators, and may be used for removal of corpuscles from gases, especially for removal of aerosols from air. The method provides for: formation of a melted material consisting of a mixture of a polymer composed of a mixture of a polymer representing a non-current-conducting thermoplastic resin with a specific resistivity exceeding 1014 Ohms·cm with a fluorine compound as an additive compound; shaping it to the required form and quenching it up to the temperature lower than the melting point of the polymer. The material is calcined and treated with an electric charge to give it electret properties. The invention improves the capability of filtering oily aerosols.
EFFECT: the invention improves the capability of filtering oily aerosols.
19 cl, 16 tbl, 19 dwg, 23 ex
FIELD: methods for imparting charge to fibrous webs by means of non-aqueous liquid for usage of said webs as filters in filtering face masks for protection of user's mouth and nose.
SUBSTANCE: method involves wetting web formed from non-conductive fibers with non-aqueous polar liquid; substantially drying web for producing fibrous electronic web. Method differs from known methods of imparting charge to web in that it requires less energy for drying of web than methods using aqueous liquids. Also, many kinds of filaments poorly wetted with aqueous liquids are immediately wetted with non-aqueous liquids.
EFFECT: increased efficiency and simplified method.
12 cl, 2 dwg, 6 tbl, 26 ex
FIELD: fine-fiber filtering materials.
SUBSTANCE: the invention is pertinent to fine-fiber filtering materials used for individual means of protection of respiratory organs. The invention offers a protection material, a means of protection containing the offered material and a method of production of the fibrous material providing for electrostatic forming of the fibrous material from a solution of styrene copolymer with acrylonitrile in an organic solvent at the presence of electrostatic additives of bromide or iodide salts of tetraethyl- or tetrabutyl-ammonium. At that a solution containing an additive of a high-molecular methylmethacrylate in amount of 0.001-0.01 mass % in the capacity of dissolvent is used a mixture of ethyl acetate with butyl acetate at their mass ratio in the solution from 1/9 up to 9/1 accordingly. The invention allows to produce a material with improved mechanical characteristics and to provide stability of the production process.
EFFECT: the invention ensures production of the material with improved mechanical characteristics and stability of the production process.
5 cl, 2 tbl, 1 ex
FIELD: fine filtration of air; cleaning ventilation emissions from oil mist; cleaning air in venting pipe lines of gas-transfer unit oil tanks.
SUBSTANCE: proposed filter includes filter element with filter medium made from coarse and fine fibers laid in between outer and inner cylinders, cover and bottom. Filter medium is made from longitudinal and transversal oil-resistant synthetic (polypropylene) fibers; ratio of mass of longitudinal and transversal fibers is equal to (6-8) : 1 and ratio of diameters of thin and coarse fibers is equal to (0.5-1) : 10.
EFFECT: enhanced efficiency of cleaning at considerable increase of service life, oil return coefficient; enhanced ecological safety around compressor stations.
2 cl, 2 dwg
FIELD: filtering materials for liquid and gaseous fluids.
SUBSTANCE: filtering material is made of thermoplastic polymeric fibers. The density of material increases downstream, whereas the diameter of fibers decreases downstream. The inner layer of the material has areas the density of fibers in which is lower than the averaged density of upper layers by a factor of 2-6.
EFFECT: enhanced strength.
1 dwg, 1 tbl
FIELD: polymer materials and gas treatment.
SUBSTANCE: invention relates to polymeric fibrous filter materials designed for effective cleaning of air stream due to realization of mechanical and electrostatic filtration. Material suitable for use in respiratory masks contains (i) a layer in the form of cloth 1 mm thick made from polypropylene fibers with diameter 0.5-1.5 μm, packaging density 0.25-0.30 g/cm3, and electric charge with surface density 17-21 nCl/cm2, the layer being made by aerodynamic atomization of melt and electrization of fibers in corona discharge field during their formation, and (ii) an additional layer in the form of non-electrized cloth 1 mm thick made from polypropylene fibers with diameter 10-20 μm and packaging density 0.25-0.30 g/cm3, which is placed on the side directly facing air stream to be cleaned, the two layers being attached to each other by spot weld. Presence of two layers results in separate but complementary realization of mechanical and electrostatic filtration.
EFFECT: enhanced air cleaning efficiency and prolonged lifetime of filter material.
FIELD: methods and devices used for production of fibrous electret linen.
SUBSTANCE: the invention is pertaining to methods and devices used for production of fibrous electret linen. The method of giving of an electrostatic charge to the fibrous non-woven linen provides that the fibrous linen is soaked with a wetting liquid, then it is saturated with a water polar liquid and dried. The gained dry product represents an electret, which may be efficiently used in the air filters, for example, in respirators.
EFFECT: the invention ensures production of a fibrous electret linen, which may be efficiently used in the air filters, for example, in respirators.
13 cl, 3 ex, 5 tbl, 4 dwg
FIELD: chemical industry; oil refining industry and other industries.
SUBSTANCE: the invention is pertaining to production of materials for the filtering water-separating elements used in devices for purification of organic fluids, predominantly, hydrocarbon fuels, oils, oil products from the emulsified water and mechanical impurities, and may be used for purification of aircraft and car fuels in chemical industry, oil refining industry and other industries. The porous reinforced material is produced out of a permeable in all directions polymeric material with a side-porous deep structure having a total porosity of no less than 50 % with the sizes of the elementary pores, predominantly, of 10 - 200 microns. At that the porous reinforced material is formed out of a framed material having filaments or fibers with a diameter, predominantly, of 5 - 400 microns, and an arranged between the above mentioned filaments or fibers filler manufactured out of a porous polyvinyl formal produced by the method of a dew-point structurization with the thermal treatment of a homogenized in water composition containing at least polyvinyl alcohol and aldehyde. The element for the screen-water-separator contains a filtering-coagulating septum embraced by a perforated shell rings and limiting from above and from below covers. At that the septum is made multilayered out of a sheet manufactured out of the above porous reinforced material. The technical result consists in an increased effectiveness of purification of fuels (jet engine fuels and diesel fuels) and the gaseous oil products from water, and also asphalt-resinous and sulfur-containing materials, an increased service life and productivity of the filtering screens based on the indicated filtering-coagulating material.
EFFECT: the invention ensures an increased effectiveness of purification of jet engine fuels, diesel fuels, gaseous oil products from water and also asphalt-resinous and sulfur-containing materials, service life and productivity of the filtering screens based on the filtering-coagulating material.
13 cl, 3 dwg
FIELD: methods of production of filtering materials.
SUBSTANCE: the invention is pertaining to the methods of production of filtering materials, in particular, to the method of production of the filtering fibrous materials, which may be used in a means of individual protection. The filtering fibrous material is produced by an electrostatic formation of a non-woven fibrous material from a working polymeric fiber-forming solution with dynamic viscosity of 1-30P, electrical conduction of 10-4-10-7 ohm-1 cm-1 in an electrostatic field at a potential difference from 10 up to 150 kV. The solution contains in the capacity of the polymer from 8.9 up to 24.6 mass % of styrene copolymer with 5.2-30.4 mass of acrylonitrile or triple styrene copolymer with 5.2-30.4 mass of acrylonitrile and 3.7-42.1 mass % of methyl methacrylate. As a dissolvent they use ethyl acetate, or butyl acetate either their mixture. The solution in addition contains high-molecular polymethyl methacrylate, a distilled water, the lowest alcohol taken from the group ethyl alcohol, methyl alcohol or isopropyl alcohol, at the following contents of ingredients of the polymeric fiber-forming solution, in mass %: polymeric compound - 8.9-24.6; high-molecular polymethyl methacrylate - 0.011-0.02; distilled water - 0.01-0.1; the lowest alcohol - 17-28; dissolvent - the rest. The efflux of the working polymeric fiber-forming solution is exercised at the volumetric speed of 0.1 up to 6 cm3 /minute. Feeding of the working polymeric fiber-forming solution is conducted from the space interval of 12-42 cm beginning from the point of its coming out from the batching device up to the settling surface. The produced filtering fibrous material contains a technological and a working layers made out of the polymeric fibrous material produced by the above described method. The technological layer material has the surface density of 1-3 g/m2 and is made out of fibers of 3-5 microns diameter. The working layer material is made out of fibers of 1.5-3 microns diameter. The double-layer material has the surface density of 32-38 g/m2, the standard resistance of 0.8-1.2 mm of the water column and the skip coefficient of no less than 95 %. The invention ensures an improved quality of the filtering material due to an increase of efficiency of penetration of fragments with a diameter of 0.3 microns at the standard resistance of 1.0 mm of the water column.
EFFECT: the invention ensures an improved quality of the filtering material, an increased efficiency of penetration of fragments with a diameter of parts of microns at the standard resistance of 1 mm of the water column.
4 cl, 2 ex
FIELD: natural gas industry; petrochemical industry; oil-producing industry; other branches of industry; methods of production of filtering materials and the filters for purification of gases and aerosols.
SUBSTANCE: the invention offers the filtering material made out of the polysulfone fibers with different diameter of the fibers produced by electromolding from the solution in the organic solvent with addition of an electrolyte; and the frame design filter supplied with the produced material having the density of 30 - 50 g/m2. The invention ensures the effective filtration of the aerosol particles at the high thermostability of the filter.
EFFECT: the invention ensures the effective filtration of the aerosol particles at the high thermostability of the filter.
5 cl, 1 tbl, 1 dwg