JP4932230B2 - Dust removal filter for vacuum cleaner - Google Patents

Description

  The present invention relates to a dust removal filter for a vacuum cleaner that is difficult for dust and dust to adhere to and that is excellent in dust separation and can easily remove the dust and dust that has adhered.

  A vacuum cleaner collects and removes dust and dust in a dust collection bag, generally called a paper pack, and a cyclone collection that separates dust, dust, and air by centrifugal separation in the dust box at the dust collection section. A cyclone system with a dust part has been proposed. In particular, the cyclone method does not require a paper pack and takes time to replace it, and the dust and dust collected in the collected dust collection unit can be thrown into the trash bin by opening and closing the dust collection unit. In recent years, many products have been developed and commercialized because they are more convenient than the pack method.

A cyclone type vacuum cleaner (hereinafter referred to as a cyclone vacuum cleaner) is a mechanism that forms a strong swirling airflow and collects dust and dust separately from air using centrifugal force formed by swirling. In general, a mechanism is adopted in which the separated dust or dust is finally separated from the air through a dust filter such as a mesh filter and a hepa filter and collected in the dust collecting part (for example, Patent Document 1, Patent) Reference 2). In addition, dust and cotton dust that cannot be separated remain in the exhausted air, so the remaining dust and cotton dust are separated through the dust filter, but these dust accumulates on the dust filter and is sucked in. Since the force is reduced, dust separation is improved for the purpose of easily removing accumulated dust (for example, Patent Document 3).
JP 2001-029288 A JP 2001-078938 A JP 2003-325398 A

  Dust and dust collected by the vacuum cleaner are classified into those having a relatively large mass made of fine particles such as sand and dirt and those having a small mass such as lint and cotton dust. Dust with a large mass can be separated from the air relatively easily, but lint and cotton dust with a small mass cannot be completely separated and accumulate on the dust removal filter. Therefore, in Patent Documents 1 and 2, there is a problem that lint or cotton dust having a small mass accumulates on the dust removal filter and causes a reduction in suction force, thereby reducing the function as a cyclone. Further, as described in Patent Document 3, for the purpose of easily removing accumulated dust and dust, it has been proposed to form a metal on the surface of the dust removal filter by sputtering in order to prevent frictional charging. However, particularly with a high mesh mesh filter, lint is entangled and may not be removed with a brush. In addition, clay-like dust such as Kanto Loam accumulates on the surface of the mesh filter and adheres to it, reducing the antistatic effect, making it easier for other dust and dirt to adhere, and causing clogging of the hepa filter At the same time, there were problems such as a reduction in suction power.

  The present invention solves the above-mentioned conventional problems, makes it difficult for lint and cotton dust to get entangled, and also makes it difficult for dust made of fine particles such as dirt and sand to adhere to it, and the dust accumulated on the filter can be easily obtained. An object of the present invention is to provide a dust removal filter for a vacuum cleaner that is excellent in dust removal and can be removed.

  As a result of intensive research, the present inventors have formed a thin film of inorganic fine particles coated with a silane monomer on the surface of the dust removal filter, so that dust composed of fine particles such as soil and sand is difficult to adhere and adheres. It has been found that it has excellent dust separation characteristics that can be easily removed, and by specifying the configuration such as mesh thickness and aperture ratio, fibrous dust such as lint and cotton dust is removed. As a result, we have obtained knowledge that can make it difficult to get tangled, and have created a new dust filter for vacuum cleaners that is useful for cyclone vacuum cleaners.

That is, the first invention is a dust removing filter for separating air and dust, the dust removing filter is made of resin fibers, and the surface of the resin fibers is made of inorganic fine particles coated with a silane monomer having an unsaturated bond. Ri Na thin film is formed, with inorganic fine particles coated with a silane monomer having an unsaturated bond to form a thin film by chemical bonding, and the coated inorganic fine particles and resin fiber surface with a silane monomer to form a thin film The thin film and the resin fiber are firmly bonded to each other, and the surface of the resin fiber is finely uneven with a thin film made of inorganic fine particles coated with a silane monomer having an unsaturated bond on the surface of the resin fiber. is, the surface roughness of the fine irregularities is, 5 to 15 nm in arithmetic mean roughness Ra and, cleaning, characterized in 30~120nm der Rukoto a ten-point average roughness Rz It is to provide a use dust-removing filter.

Furthermore, the second invention provides a dust removal filter for a vacuum cleaner, wherein the chemical bond is graft polymerization.

Furthermore, in the third invention, the dust filter comprising the resin fiber is a mesh structure, the dust filter has a mesh number of 20 to 200, the dust filter has a mesh thickness of 70 to 460 μm, and the dust filter. The present invention provides a dust removal filter for a vacuum cleaner, wherein the filter has a mesh opening ratio of 39 to 65%.

  According to the present invention, since a thin film of inorganic fine particles coated with a silane monomer is formed on the surface of a dust removal filter that separates air and dust made of resin fibers on the resin surface, charging due to friction does not occur. In addition, the uneven shape of the inorganic fine particles suppresses the adhesion of dust made of soil and sand, and even if attached, the uneven shape of the inorganic fine particles reduces the adhesion of dust made of soil and sand, making it light. It is characterized by excellent dust-removing properties that can easily remove dust adhering to it by applying an impact. Thus, clogging due to dust accumulation can be suppressed.

  Therefore, according to the present invention, dirt and dust can be prevented from adhering to the surface of the dust removal filter in the cyclone vacuum cleaner, and even if it adheres, dust can be easily removed easily. Therefore, it is possible to prevent clogging due to dust for a long period of time, and to maximize the suction characteristics of the cyclone vacuum cleaner.

  Below, the dust removal filter for vacuum cleaners of the embodiment of the present invention will be described in detail.

  FIG. 1 is a partially enlarged view of a vacuum cleaner dust filter 100 according to an embodiment of the present invention. FIG. 2 is an enlarged view of a part of a cross section of a resin fiber 1 of the vacuum cleaner dust filter 100 according to an embodiment of the present invention. FIG. The vacuum cleaner dust filter 100 of this embodiment is configured by forming a thin film made of inorganic fine particles 2 on a resin fiber 1.

  In FIG. 2, an example of the embodiment of the present invention is schematically illustrated so that the fine particles are formed in one layer. However, a plurality of fine particles may overlap to form a fine particle layer. The fine particles may be chemically bonded to each other.

  As a material constituting the resin fiber 1 used for the vacuum cleaner dust filter 100 of the present embodiment, any material may be used as long as the chemical bond 5 by the silane monomer 3 having an unsaturated bond is possible.

  Here, the resin fiber 1 is a fiber (synthetic fiber or chemical fiber) made of a synthetic resin. For example, the polyester fiber, the polyamide fiber, the polyvinyl alcohol fiber, the acrylic fiber, the vinyl chloride fiber, or the vinylidene chloride. Examples thereof include fibers, polyolefin fibers, polycarbonate fibers, fluorine fibers, polyurea fibers, elastomer fibers, and composite fibers of the materials constituting these fibers and the above resin materials.

  The vacuum cleaner dust filter 100 in the present embodiment is made of a mesh structure made of resin fibers 1, and the resin fibers 1 are monofilaments, multifilaments, or the like. Further, the portion where the resin fibers 1 intersect may or may not be fused, and the entire mesh structure may be calendered.

  The number of meshes in this embodiment is 20 to 200 meshes, and if it is less than 20 meshes, dust with a small mass such as lint and cotton dust is transmitted, which causes clogging of the hepa filter, which is not preferable. On the other hand, when it is larger than 200 mesh, fibrous lint, cotton dust and the like are entangled with the mesh, which is not preferable. In addition, when the mesh thickness is 70 to 460 μm and the mesh opening ratio is 39 to 65%, fibrous dust such as lint and cotton dust is difficult to get entangled in the mesh structure and is deposited on the mesh. It is particularly preferable because the dust that has been removed can be easily removed.

  If the mesh thickness is less than 70 μm, the strength of the mesh is weak, and the mesh is deformed or broken by the pressure of the air flow, which is not preferable. In addition, when the mesh thickness is larger than 460 μm, it is difficult to obtain a desired opening ratio because the diameter of the yarn constituting the mesh is thick, and deformation at the intersection of the warp and weft is large, and the mesh is on the mesh. The characteristic of uniformly removing accumulated dust is deteriorated. From the viewpoint of the pressure loss of the air flow, that is, the suction ability of the vacuum cleaner, it is desirable that the mesh opening ratio is large. However, 39 to 65% is required to maintain the sufficient strength as a filter for the vacuum cleaner and to exhibit the filter function. Particularly preferred is 45 to 55%.

  Here, the number of meshes indicates the number of warp yarns or weft yarns as a woven fabric existing at intervals of 25.4 mm. The number of meshes of the warp and weft may be the same or different. The mesh aperture ratio is the ratio of the transmission area of parallel rays to the projected mesh area on the projection surface when parallel rays are projected perpendicularly to the mesh surface.

  Examples of the inorganic fine particles 2 used in the vacuum cleaner dust filter 100 of the present embodiment include silicon oxide as a non-metal oxide, and metal oxides such as magnesium oxide, barium oxide, barium peroxide, and aluminum oxide. And oxides such as tin oxide, titanium oxide, titanium peroxide, zirconium oxide, iron oxide, iron hydroxide, tungsten oxide, bismuth oxide, indium oxide, titanium barium oxide, oxidation Examples of the composite oxide include cobalt aluminum and alumina-silica. The crystallinity of these inorganic fine particles may be either amorphous or crystalline.

  In the vacuum cleaner dust filter 100 of this embodiment, the inorganic fine particles 2 are fixed to the above-described resin fibers 1 by the chemical bonds 5 (black circles in the figure) with the silane monomer 3 having an unsaturated bond. .

  Specific examples of the unsaturated bond of the silane monomer 3 include a vinyl group, an epoxy group, a styryl group, a methacrylo group, an acryloxy group, and an isocyanate group.

  The dust-removing filter 100 for a vacuum cleaner of the present embodiment uses the silane monomer 3 excellent in reactivity, so that the inorganic fine particles 2 are bonded to the chemical bonds 5 of the inorganic fine particles 2 by the dehydration condensation reaction of silanol groups of the silane monomer 3. The vacuum cleaner dust filter is bonded to the resin fiber surface by a chemical bond 5 by graft polymerization, which will be described later, to the resin surface of the functional group resin fiber 1.

  Examples of the silane monomer 3 used in the vacuum cleaner dust removal filter 100 according to the present embodiment include vinyltrimethoxysilane, vinyltriethoxysilane, vinyltriacetoxysilane, N-β- (N-vinylbenzylaminoethyl). ) -Γ-aminopropyltrimethoxysilane, N- (vinylbenzyl) -2-aminoethyl-3-aminopropyltrimethoxysilane hydrochloride, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 3-glycidoxypropyltriethoxysilane, p-styryltrimethoxysilane, 3-methacryloxypropylmethyldimethoxysilane And 3-methacryloxypropyltrime Kishishiran and 3-meth and methacryloxy propyl methyl diethoxy silane, and 3-methacryloxypropyl triethoxysilane, 3-acrylic or trimethoxy silane, and 3-isocyanate propyl triethoxy silane.

  These silane monomers 3 are used alone or in combination. As a form of use, a necessary amount of the silane monomer 3 is dissolved in an organic solvent such as methanol, ethanol, acetone, toluene or xylene. In addition, hydrochloric acid or mineral acid such as nitric acid is added to improve dispersibility.

  Solvents used include lower alcohols such as ethanol, methanol, propanol and butanol, lower alkyl carboxylic acids such as formic acid and propionic acid, aromatic compounds such as toluene and xylene, ethyl acetate and butyl acetate, etc. Esters and cellosolves such as methyl cellosolve and ethyl cellosolve may be used alone or in combination.

  The inorganic fine particles 2 used in the vacuum cleaner dust removing filter 100 of the present embodiment are used for production in a state of being dispersed in the solution of the silane monomer 3 described above. The inorganic fine particles 2 are dispersed by stirring and dispersing using a homomixer or a magnetic stirrer, pulverizing / dispersing using a ball mill, sand mill, high-speed rotating mill, jet mill, or the like, or using ultrasonic waves. Is called.

  The inorganic fine particles 2 are used in the manufacture of the vacuum cleaner dust filter 100 in the form of a dispersed colloidal dispersion or a dispersion obtained by pulverization. The dispersion of inorganic fine particles 2 is obtained by adding silane monomer 3 to a colloidal dispersion or a dispersion obtained by pulverization, and then dehydrating and condensing silane monomer 3 on the surface of inorganic fine particles 2 while heating under reflux. A method of forming a thin film made of silane monomer 3 by bonding by reaction, or after adding silane monomer 3 to a dispersion obtained by pulverization or by adding silane monomer 3 and pulverizing to pulverization The silane monomer is bonded to the surface of the inorganic fine particles 2 by a dehydration condensation reaction by solid-liquid separation and heated at 100 to 180 ° C., and then pulverized and pulverized for redispersion.

Furthermore, if the inorganic fine particle layer 10 made of the inorganic fine particles 2 is thick, the inorganic fine particle layer 10 may be deteriorated due to cohesive failure depending on the stress of the inorganic fine particle layer 10 or the usage environment. A silane monomer having a saturated bond, an alkoxylane compound represented by Si (OR ₁ ) ₄ (wherein R ₁ represents an alkyl group having 1 to 4 carbon atoms), for example, tetramethoxysilane or tetraethoxysilane R _2n Si (OR ₃ ) _4-n (wherein R ₂ is a hydrocarbon group having 1 to 6 carbon atoms, R ₃ is an alkyl group having 1 to 4 carbon atoms, and n is an integer of 1 to 3) For example, methyltolylmethoxysilane, methyltriethoxysilane, dimethyldiethoxysilane, phenyltriethoxysilane, hexamethyldisilazane, Such Sil trimethoxysilane, etc. Other alkoxy oligomer is used are added.

  Next, a method for chemically bonding the resin fiber 1 and a solution in which the inorganic fine particles 2 and the silane monomer 3 are mixed will be described. In the present embodiment, as a method for chemically bonding the resin fibers 1 and the inorganic fine particles 2, a bonding method by graft polymerization is used.

  Examples of the graft polymerization in the vacuum cleaner dust filter 100 of the present embodiment include graft polymerization using a peroxide catalyst, graft polymerization using heat and light energy, and graft polymerization using radiation (radiation graft polymerization).

  Of these, radiation graft polymerization is particularly suitable from the viewpoints of simplicity of the polymerization process and production speed. Here, examples of the radiation used in the graft polymerization include α rays, β rays, γ rays, electron beams, ultraviolet rays, and the like. Lines and ultraviolet rays are particularly suitable.

  The manufacturing method of the dust removal filter 100 for vacuum cleaners using the graft polymerization in this embodiment is suitably manufactured by the method described below.

  As a first preferred method in this embodiment, a solution in which inorganic fine particles 2 to which a silane monomer 3 is bonded is dispersed is applied to the surface of the resin fiber 1 of the vacuum cleaner dust filter 100 to be bonded. Resin of the dust removal filter 100 for a vacuum cleaner to which inorganic fine particles 2 to which silane monomer 3 is bonded are applied after removing the solvent by a method such as heating and drying according to the conditions, and then applying radiation such as γ rays, electron beams, or ultraviolet rays. By irradiating the surface of the fiber 1, the silane monomer 3 is graft-polymerized on the surface of the resin fiber 1 of the vacuum cleaner dust filter 100, and at the same time, the inorganic fine particles 2 are bonded, so-called simultaneous irradiation graft polymerization.

  In addition, as a second preferred method in the present embodiment, the surface of the resin fiber 1 of the vacuum cleaner dust filter 100 is irradiated with radiation such as γ rays, electron beams, or ultraviolet rays in advance before the silane monomer 3. It is manufactured by so-called pre-irradiation graft polymerization in which a solution in which inorganic fine particles 2 bonded with water are dispersed and the silane monomer 3 and the resin fiber 1 are reacted and simultaneously bonded with the inorganic fine particles 2.

  In this embodiment, as described above, the solution in which the inorganic fine particles 2 to be immobilized are dispersed is applied to the surface of the resin fiber 1 of the vacuum cleaner dust filter 100 to be immobilized to manufacture the vacuum cleaner dust filter.

  As a specific method for applying the dispersion liquid of the inorganic fine particles 2, generally used spin coating method, dip coating method, spray coating method, cast coating method, bar coating method, micro gravure coating method, Various methods such as screen printing, pad printing, offset printing, dry offset printing, flexographic printing, and inkjet printing can be used as gravure coating methods or partial coating methods. There is no particular limitation as long as it can be used and can be applied according to the purpose.

  Moreover, in order to perform the graft polymerization of the silane monomer 3 efficiently and uniformly, the surface of the resin fiber 1 is previously subjected to corona discharge treatment, plasma discharge treatment, flame treatment, chromic acid or perchloric acid. It may be hydrophilized by chemical treatment with an aqueous solution of an oxidizing acid such as an alkaline aqueous solution containing sodium hydroxide or the like.

  By the manufacturing method described above, fine irregularities are formed on the surface of the resin fiber 1 on which the thin film of inorganic fine particles coated with the silane monomer is formed. When this fine unevenness is measured with a stylus type surface roughness meter (DEKTAK3030ST manufactured by ULVAC, Inc.), the arithmetic average roughness Ra is 5 to 15 nm, and the ten-point average roughness Rz is 30 to 120 nm. there were. FIG. 3 is an enlarged view of a part of the cross section of the vacuum cleaner dust removal filter 100 according to the embodiment of the present invention, schematically showing the surface unevenness state. Due to the synergistic action of such fine irregularities on the surface and the silane monomer that coats the inorganic fine particles, a surface that suppresses the adhesion of dust made of soil or sand and reduces the adhesion force was formed.

  As described above, according to the vacuum cleaner dust filter 100 of the embodiment of the present invention, a thin film of inorganic fine particles coated with a silane monomer is formed on the surface of the dust filter for separating air and dust made of resin fibers. Since it is formed on the surface, there is no charging due to friction, and the uneven shape of the inorganic fine particles suppresses the adhesion of dust such as soil and sand. The adhesion of dust such as soil and sand is alleviated, and it exhibits a feature that makes it easy to remove attached dust by applying a light impact. Can be suppressed. In addition, since the dust removal filter made of the resin fiber is a mesh structure having a structure in which fibrous dust such as lint and cotton dust is difficult to be entangled, the collected dust can be easily removed from the filter surface. .

  According to this embodiment, as described above, a thin film made of inorganic fine particles can be formed in various forms (shape, size, etc.) suitable for the purpose of use, such as a fiber shape such as a nonwoven fabric other than a mesh, or a cloth shape. It can be applied to various filters such as ventilation fans other than for vacuum cleaners, air conditioner filters, automotive air elements, car air conditioner filters, hepa filters.

  Next, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to only these examples.

<Production of vacuum cleaner dust filter>
The dust removal filter for a vacuum cleaner in this example was manufactured using an Iwazaki Electric Co., Ltd., electro curtain type, CB250 / 15 / 180L as an electron beam irradiation device.

Example 1
10.0 wt% of commercially available titanium dioxide fine particles (manufactured by Teika Co., Ltd., MT-100HD) with respect to methanol and 3-methacryloxypropyltrimethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd., KBM-503) as a silane monomer. After adding 10.0% by weight to the fine particles to adjust the pH to 3.0 with hydrochloric acid, the mixture was pulverized and dispersed to an average particle size of 17 nm by a bead mill. Thereafter, solid-liquid separation was performed by a freeze dryer, and the film was heated at 120 ° C. to chemically bond the silane monomer to the surface of the titanium dioxide fine particles by a dehydration condensation reaction to form a thin film. The obtained silane monomer-coated titanium dioxide fine particles were dispersed in 10.0% by weight in methanol and pulverized and dispersed again to an average particle size of 20 nm by a bead mill, and then methanol was added to adjust the solid content to 5.0% by weight.

Further, after a mesh filter made of polyester resin monofilaments having mesh numbers (1) 60, (2) 80, and (3) 120 is subjected to corona discharge treatment, the titanium dioxide fine particle-dispersed methanol solution to which the silane monomer is bonded is used. Immersion for 1-2 minutes. Next, the excess titanium dioxide fine particle-dispersed methanol solution was removed by air blowing, dried at 120 ° C. for 3 minutes, and then coated with the titanium dioxide fine particle-dispersed methanol solution (1) to (3). by 5Mrad irradiating a line at an acceleration voltage of 200 kV, the mesh surface was formed by bonding a thin film made of coated titanium dioxide particles with a silane monomer.

(Comparative Example 1)
The meshes (1), (2), and (3) used in Example 1 were used as they were.

<Dust adhesion evaluation to mesh filter for vacuum cleaner>
The size of 10 × 10 cm, the mesh of thin titanium dioxide particles coated with the silane monomer was formed (1) to (3), the dust conforming to JISZ8901, Kanto loam, mixed dust (cotton linters, Dust adhesion was evaluated by thoroughly removing the dust (including Kanto Loam and silica sand), removing the excess dust with a light impact, and measuring the weight before and after the dust was deposited. The results are shown in Table 1.

As shown in Table 1 the results of a thin film of titanium dioxide particles coated with the silane monomer was formed (1) in the mesh to (3), Rohm Kanto conforming to JISZ8901, dust, etc. mixed dust almost Since it does not adhere, it has been demonstrated that it is excellent in dust removal. In contrast, a large amount of dust adhered to the untreated mesh.

<Mounting test with vacuum cleaner>
(Example 2)
Remove the mesh filter attached to the dust case of a commercially available cyclone vacuum cleaner (Tatsumaki Cyclone CV-SJ10, manufactured by Hitachi Home & Life Solutions Co., Ltd.), and remove the mesh filter of (2) obtained in Example 1. A mounting test was conducted for 1 hour indoors. After the test, the dust case was removed from the vacuum cleaner, and the dust collected in the dust case was opened in the dust case, thrown into the dust box with the opening down, and the mesh filter was observed. No dust was observed on the mesh surface.

(Comparative Example 2)
Except that the mesh filter used in Example 2 was changed to (2) of Comparative Example 1, a mounting test was performed under the conditions of Example 2, and after removing collected dust, the mesh surface was observed. There was dust on the center.

<Mesh filter cotton dust and lint removal test>
Dust collected in ordinary households and offices contains relatively large amounts of bulky and light dust such as cotton dust and lint. A dust detachment test from a mesh filter was performed using dust collected in a general household and dust containing a lot of lint. A mesh filter was attached to the suction pipe tip (inner diameter: 35 mmφ) of the vacuum cleaner, and about 10 g of the dust was sucked and deposited on the tip of the mesh filter. Thereafter, the pipe near the mesh filter was lightly tapped, the accumulated dust was removed, and the presence or absence of lint entangled with the mesh filter was visually confirmed. Moreover, the weight of the dust that passed through the mesh filter and could not be collected was measured from the weight difference between the dust cases before and after the test. The mesh filters used were 6 types of polyesters with a mesh number of 14, 20, 60, 120, 200, 230 on which a thin film made of titanium dioxide fine particles coated with a silane monomer was formed on the mesh surface by the same treatment as in Example 1. A mesh made of resin monofilament was used. The test results are shown in Table 2.

  The cotton dust deposited on the mesh filter is easily detached by applying a light vibration. However, when the number of meshes is larger than 200, the yarn is entangled in the mesh and is not easily detached. If the number of meshes is less than 20, the weight of the dust that passes without being collected by the mesh filter is increased. As a result, the load on the hepa filter installed in the subsequent stage is increased, clogging, reduction in suction force, etc. This is not preferable because it causes a decrease in function.

  As described above, the dust removing filter for a vacuum cleaner of the present invention has a thin film of inorganic fine particles coated with a silane monomer formed on the surface of the dust removing filter that separates air and dust made of resin fibers. Therefore, charging due to friction does not occur, the uneven shape of the inorganic fine particles suppresses the adhesion of dust made of soil and sand, and even if it adheres, the uneven shape of the inorganic fine particles makes the soil and sand. Since the adhesion force of the dust is relaxed and the feature of excellent dust separation property that can be removed easily by applying a light impact, clogging due to dust accumulation can be suppressed. In addition, since the dust removal filter made of resin fiber is a mesh structure that has a structure in which fibrous dust such as lint and cotton dust is difficult to get entangled, the collected dust can be easily removed from the surface of the dust removal filter. It is a dust filter with excellent practicality.

It is the elements on larger scale of the dust removal filter for vacuum cleaners of the embodiment of the present invention. It is the schematic diagram which expanded a part of cross section of the resin fiber which comprises the dust removal filter for vacuum cleaners of embodiment of this invention. It is a schematic diagram which shows the uneven | corrugated state of the surface which expanded a part of cross section of the resin fiber which comprises the dust removal filter for vacuum cleaners of embodiment of this invention.

Explanation of symbols

1: Resin fiber 2: Inorganic fine particle 3: Silane monomer 5: Chemical bond 10: Inorganic fine particle layer 100: Dust removal filter for vacuum cleaner

Claims (3)

A dust filter for separating air and dust, wherein the dust filter is made of resin fiber, and a thin film made of inorganic fine particles coated with a silane monomer having an unsaturated bond is formed on the surface of the resin fiber. The inorganic fine particles coated with the silane monomer having an unsaturated bond are chemically bonded to form the thin film, and the inorganic fine particles coated with the silane monomer forming the thin film and the resin fiber surface The space is chemically bonded, and the thin film and the resin fiber are fixed,
The surface of the resin fiber is formed with fine irregularities by a thin film made of inorganic fine particles coated with a silane monomer having an unsaturated bond on the surface of the resin fiber, and the surface roughness of the fine irregularities is an arithmetic average roughness. is 5~15nm in Ra, and dust filters for vacuum cleaners, wherein 30~120nm der Rukoto a ten-point average roughness Rz. The dust filter for a vacuum cleaner according to claim 1 , wherein the chemical bond is graft polymerization. The dust filter made of the resin fiber is a mesh structure,
The number of meshes of the dust filter is 20 to 200,
The dust filter has a thickness of 70 μm to 460 μm,
And the dust removal filter for vacuum cleaners of Claim 1 or 2 whose opening ratio of the said dust removal filter is 39 to 65%.