JP2015002946A - Flame-retardant deodorant filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flame-retardant deodorant filter which is capable of exhibiting satisfactory catalytic action without deteriorating performance of an adsorbent and has the strength, dropout resistance and handleability required in practical use: and the flame retardancy required by UL Standard or the like.SOLUTION: The flame-retardant deodorant filter is constituted so that the adsorbent is wrapped in an organic fiber woven fabric and the wrapped adsorbent is fixed by a thermoplastic binder. The adsorbent comprises metal oxide particles, each of which consists of metal oxide and a mineral binder, and a catalyst particle comprising an activated carbon particle. The average particle diameter of the metal oxide particles is 0.01-50 μm. The content of the mineral binder in the metal oxide particles is 5-50 wt.% of the weight thereof. The content of the thermoplastic binder is 1-15 pts.wt. on the basis of 100 pts.wt. of the catalyst particle.

Description

  The present invention relates to a flame retardant deodorizing filter that is incorporated in electronic devices such as a copying machine, a printer, a multi-function OA machine, a computer, a projector, and a POD printing machine to remove harmful gas components. The deodorization referred to here includes not only the removal of odorous substances but also harmful gas components that affect the human body and the environment by being released into the environment, as well as the removal of gases that cause problems inside the electronic equipment.

  In recent years, electronic devices such as copiers, printers, multi-function OA machines, computers, projectors, and POD printers have been increasingly integrated and miniaturized. It is becoming indispensable. However, the components used in printing such as ink and toner, the plastics that make up the main body of electronic equipment, and the various components contained in rubber used in various joints are subject to temperature rise during device operation. Gasification is promoted and discharged into the room as a harmful component. In addition, in copiers, laser printers, and the like, use of a high voltage may cause not only the gas components described above but also ozone generated from the atmosphere. In recent years, due to an increase in awareness of environmental issues, emission regulations have been implemented for harmful gas components. For example, in Germany, an environmental label “BAM (Blue Angel Mark)” has been established, and environmental performance standards to be achieved for each electronic device are defined.

  In order to reduce harmful gas components discharged from the electronic device or suppress inhalation of gas components that adversely affect the electronic device, a deodorizing filter is incorporated in the electronic device. Since the deodorizing filter is incorporated in an electronic device, it not only excels in removing harmful gas components, but it is essential to acquire a flame retardant standard UL (Underwriters Laboratories Inc.) (see Non-Patent Document 1).

  Deodorizing filters for removing ozone and harmful gases by being incorporated in electronic devices such as laser printers and various air conditioners are well known. Adsorbents with a large surface area such as activated carbon and zeolite are effective for removing gas components, but in order to make them more effective (long life and low concentration), a deodorizing catalyst with a chemical adsorption / decomposition mechanism Is used.

  As a method of using a catalyst and an adsorbent in combination, a deodorizer capable of directly attaching and supporting a metal catalyst component on an adsorbent such as activated carbon and maintaining the deodorizing performance for a long time by the catalytic action is disclosed (for example, Patent Document 1). However, in the deodorizer in which the catalyst is directly attached to and supported on the adsorbent in this way, the adsorbent's ability is lowered by covering the outer surface of the adsorbent with the desired deodorization performance. There is a problem that it becomes impossible.

  Further, a method is disclosed in which metal oxide particles as a catalyst are brought into contact with a fabric in a heated state, and the metal oxide is supported on the fabric by the thermoplasticity of the fabric (for example, Patent Document 2). However, since the metal oxide powder is not bonded by the binder, there is a problem that the metal oxide powder is easily scattered during ventilation and a problem that it is difficult to obtain the combined effect of the catalyst and the adsorbent. is there.

  In addition, a method of mixing particles such as metal or metal oxide particles and an adsorbent as a catalyst and performing pressure molding (referred to as pressure molding method) is also disclosed (for example, Patent Document 3). Specifically, a method is disclosed in which 40 parts by weight of manganese dioxide, 20 parts by weight of copper oxide and 40 parts by weight of γ-alumina are mixed and pressure-molded into a tablet shape. However, when producing catalyst particles by the pressure molding method, the metal or metal oxide particles are densely packed, the air permeability is deteriorated, and the specific surface area is reduced by compressing and collapsing the adsorbent inside. There is a problem that the desired deodorizing performance cannot be obtained.

  As described above, regarding a deodorizing filter for removing harmful gas components, a configuration having sufficient performance in a combination of a catalyst and an adsorbent is not known.

JP-A-9-262273 JP 2008-114109 A Japanese Patent Laid-Open No. 50-30795

UL 94: Standard for Safety Tests for Flammability of Plastic Materials for Parts in Devices and Applications. UL 94: Standard for Safety Tests for Flammability of Plastic Materials for Parts in Devices and Applications.

  The present invention solves the above-mentioned problems caused by the combined use of the catalyst and adsorbent of the prior art, and can exhibit sufficient catalytic action without reducing the performance of the adsorbent, and in actual use. An object of the present invention is to provide a deodorizing filter having flame resistance as required by strength, omission, handling, and UL.

  As a result of diligent research to achieve the above object, the present inventor mixed a powdered metal oxide with a mineral binder and granulated in advance, and composited the obtained metal oxide particles and activated carbon particles to form a catalyst. It was found that by using particles and adsorbents, the performance of the catalyst and activated carbon can be fully exerted, and problems such as dust generation and dropping can be solved. In particular, by using a mineral binder for the catalyst particles, the voids between the particles are maintained while binding the metal oxide particles and the activated carbon particles, so the effectiveness of the catalyst is increased, and further the combustibility and oxidization properties are increased. Since the contact area between the high catalyst particles and the thermoplastic resin binder is reduced, the present invention has been found to be effective for the development of flame retardancy, and the present invention has been completed.

That is, the present invention is as follows.
1. In a filter in which an adsorbate is sandwiched between organic fiber fabrics and the adsorbate is fixed with a thermoplastic resin binder, the adsorbate is a catalyst particle composed of metal oxide particles composed of a metal oxide and a mineral binder and activated carbon particles, The average particle diameter of the oxide particles is 0.01 to 50 μm, the content of the mineral binder in the metal oxide particles is 5 to 50% by weight with respect to the metal oxide, and the content of the thermoplastic resin binder is 100% by weight of the catalyst particles. 1 to 15 parts by weight with respect to parts, a flame-retardant deodorizing filter.
2. 2. The flame-retardant deodorizing filter according to 1 above, wherein the metal oxide is at least one selected from the group consisting of manganese, copper, cobalt oxides and peroxides thereof.
3. 3. The flame-retardant deodorizing filter according to 1 or 2 above, wherein the mineral binder is at least one selected from the group consisting of zeolite, sepiolite, bentonite, and activated clay.

  The flame-retardant deodorizing filter of the present invention is a catalyst particle that uses metal mineral particles to fix metal oxide particles and activated carbon particles while maintaining appropriate voids, so that powder does not scatter from the catalyst particles. Even if the organic fiber fabric is sandwiched and fixed by a thermoplastic resin binder, sufficient catalytic performance can be obtained.

The schematic sectional drawing of the flame-retardant deodorizing filter of this invention is shown. The schematic of the adsorbate of this invention is shown.

  Hereinafter, the flame-retardant deodorizing filter of the present invention will be described in detail.

  As shown in FIG. 1, the flame-retardant deodorizing filter of the present invention comprises a catalyst layer A and cover materials B provided on both sides thereof, the cover material B contains fibers that carbonize during combustion, and Flame retardant. In the catalyst layer A, catalyst particles 1 which are adsorbed materials are fixed by a thermoplastic resin binder 2. As shown in FIG. 2, the catalyst particles 1 are made of a granulated product of activated carbon particles 3, metal oxides 4, and mineral binders 5.

The activated carbon particles 3 used for the catalyst particles 1 of the present invention are not particularly limited as long as harmful gas components can be removed. For example, activated carbon particles such as coal-based activated carbon, coconut shell activated carbon, and wood-based activated carbon can be used. The specific surface area of the activated carbon particles used is preferably 500 meters ² / g or more, more preferably 800~2000m ² / g. If the specific surface area is less than 500 m ² / g, toluene removal performance may be lowered.

  The average particle diameter of the activated carbon particles is not particularly limited, but is preferably 0.1 to 250 μm. When the average particle diameter is less than 0.1 μm, dust and the like are generated, so that the handleability is deteriorated, and when it exceeds 250 μm, formation of catalyst particles may be difficult.

  Examples of the metal oxide 4 used for the catalyst particles 1 of the present invention include manganese, copper, cobalt oxides, peroxides thereof, and the like. At least one of these is used. The metal oxide 4 may be a metal complex oxide.

  Examples of the mineral binder 5 used for the catalyst particles 1 of the present invention include clay minerals such as zeolite, sepiolite, bentonite and activated clay. At least one of these is used. In particular, the use of a layered or fibrous clay mineral is preferred.

  In the catalyst particle 1 of the present invention, the metal oxide 4 and the mineral binder 5 are mixed and granulated in advance and used as metal oxide particles. The mineral binder 5 in the metal oxide particles has a role of fixing the activated carbon particles and the metal oxide particles. Activated carbon particles and metal oxide particles are not covered with the mineral binder in the metal oxide particles, but are fixed to the fibrous or layered mineral binder at the contact portion, and have appropriate voids to form catalyst particles. To do.

  The metal oxide particles have an average particle diameter of 0.01 to 50 μm. If it is smaller than 0.01 μm, the handleability is poor, and if it is larger than 50 μm, the mixed state with the mineral binder is deteriorated, and the surface area of the metal oxide particles is further reduced.

  The proportion of the mineral binder 5 in the catalyst particles 1 of the present invention is 5 to 50% by weight with respect to the metal oxide 4. If the amount is less than 5% by weight, it is difficult to form catalyst particles, and if the amount is more than 50% by weight, the catalyst performance may not be sufficiently exhibited.

  The catalyst layer, which is the adsorbate of the present invention, contains a thermoplastic resin binder 2 in order to adhere the components of the catalyst particles 1 to each other and improve the handleability when forming the catalyst layer. As the thermoplastic resin binder 2, a thermoplastic resin having a large critical oxygen index (LOI value) such as a polyester resin, a urea resin, a polyamide resin, or a polyimide resin can be used. Among these resins, polyester resins and polyamide resins are preferable from the viewpoints of economy and availability. As the thermoplastic binder 2, a particulate thermoplastic resin is used.

  The average particle diameter of the thermoplastic resin binder particles is not particularly limited, but is preferably 1.0 to 150 μm, and more preferably 5.0 to 80 μm. When the average particle diameter is less than 1.0 μm, dust and the like are generated, so that the handleability is deteriorated, and when it exceeds 150 μm, there is a possibility that the activated carbon is not mixed uniformly.

  The melting point of the thermoplastic resin binder particles is preferably 80 ° C. to 150 ° C., more preferably 100 ° C. to 130 ° C. in consideration of the environmental temperature of office equipment and the like.

  The fluidity at the time of melting of the thermoplastic resin binder particles is an MI value described in JIS K 7210, preferably 1 to 80 g / 10 min, more preferably 3 to 30 g / 10 min. If it is this range, catalyst particles can be adhere | attached firmly, preventing the coating | cover of the surface of the activated carbon in a catalyst particle.

Content of the catalyst particles 1 in the catalyst layer is adsorbate is preferably from 50 to 400 g / ^{m 2,} more preferably 100~350g / ^{m 2,} more preferably 200-30Og / ^{m 2.} When the content of the catalyst particles 1 is less than 50 g / m ² , the performance of removing harmful gases such as toluene is lowered, and when it exceeds 400 g / m ² , the handleability at the time of pleating is deteriorated.

  The content of the thermoplastic resin binder 2 in the catalyst layer as an adsorbed material is 1 to 15 parts by weight, preferably 3 to 10 parts by weight, based on 100 parts by weight of the catalyst particles. If the content of the thermoplastic resin binder is less than 1 part by weight, the catalyst layer may be weakly adhered and peeling may occur. If the content exceeds 15 parts by weight, both flame retardancy and VOC / ozone performance may be satisfied. It may not be possible.

  The flame-retardant deodorizing filter of the present invention needs to have an organic fiber cloth as a cover material on both surfaces of the catalyst layer which is an adsorbed material. With such a laminated structure, the activated carbon can be prevented from falling off during the combustion test. Although the form of the organic fiber fabric to be used is not particularly limited, it can be composed of, for example, a nonwoven fabric, a knitted fabric, or a woven fabric. Among them, the nonwoven fabric is preferable. From the viewpoint of preventing the catalyst particles from falling off when forming the filter, those having a particle size smaller than the particle size of the catalyst particles are preferable.

  The nonwoven fabric is made from a fiber containing one or more fibers selected from the group consisting of cellulose fiber, polyvinyl alcohol fiber, polyacrylonitrile fiber, and phenol fiber. From the fiber shape maintenance at the time of combustion, it contains 30 to 100% of any of these fibers.

  As a method for producing the nonwoven fabric, a thermal bond method, a chemical bond method, a needle punch method, a spunlace method (a hydroentanglement method), or the like can be used. It is also preferable that the fabric is made of fibers spun by kneading a flame retardant.

Although the fabric weight and thickness of a fabric are not specifically limited, Preferably, a fabric weight is 10-45 g / m < ² > and thickness is 0.05-2 mm. If the basis weight is less than 10 g / m ² , the activated carbon particles fall off from the fabric during sheet processing, and if it exceeds 45 g / m ² , the workability during formation of the activated carbon layer may deteriorate. Moreover, when the thickness is less than 0.05 mm, the activated carbon particles fall off from the fabric during sheet processing, and when it exceeds 2 mm, the handleability during formation of the activated carbon layer may be deteriorated. Here, the thickness of the fabric refers to the thickness measured at 7 gf / cm ² load.

  In the present invention, the organic fiber fabric preferably contains a flame retardant. This is because the inclusion of the flame retardant in the organic fiber fabric has the effect of making the organic fiber fabric itself flame retardant and the effect of maintaining the fiber shape of the fabric during combustion.

  The flame retardant contained in the organic fiber fabric is preferably a phosphorus-based flame retardant from the viewpoint of the flame retardant effect, and is applied to the fabric and dried to give a water-soluble flame retardant such as guanidine phosphate, ammonium phosphate, More preferred is ammonium polyphosphate.

  The organic fiber fabric preferably contains 10 to 80% by weight of the flame retardant with respect to the weight of the organic fiber fabric, and more preferably 20 to 70% by weight. If the amount is less than 10% by weight, the flame retardancy of the entire filter may be insufficient. If the amount exceeds 80% by weight, the workability of attaching the flame retardant may be deteriorated and a problem such as an increase in pressure loss may occur. is there.

  The catalyst particles 1 of the present invention can be produced by mixing and granulating activated carbon particles, metal oxides, mineral binders, and water. The average particle diameter of the granulated catalyst particles is preferably 100 to 850 μm. When the average particle diameter is less than 100 μm, dusts and the like are generated, so that the handleability is deteriorated, and when it exceeds 850 μm, formation of catalyst particles may be difficult.

  Here, the activated carbon particles, the metal oxide, the mineral binder, and water are mixed and granulated. First, the metal oxide, the mineral binder, and water are first mixed to generate metal oxide particles. This is because if metal oxide, activated carbon particles and mineral binder are mixed and granulated at the same time, the metal oxide and activated carbon particles are close to each other during granulation, and the catalyst performance may not be sufficiently exhibited. Therefore, after mixing the mineral binder and the metal oxide first to obtain the metal oxide particles, the activated carbon particles are added to form the particles with the mineral binder, and an appropriate gap is formed between the activated carbon particles and the metal oxide particles. I can keep it.

  The deodorizing filter of the present invention configured as described above can be used not only in a sheet shape but also by pleating.

  Hereinafter, although an example shows an operation effect of a deodorizing filter of the present invention concretely, the present invention is not limited at all by these. In addition, the evaluation method of the characteristic value measured in the Example is shown below.

(Flame retardance)
Evaluation was carried out by a horizontal combustion test described in Non-Patent Document 1. In this horizontal combustion test, a supporting wire mesh that can place a test piece at a predetermined height is used, and absorbent cotton (marked cotton) is placed under the wire mesh at a distance of 175 ± 25 mm. A test piece that is cut into a strip shape of 150 ± 1 mm in length and 50 ± 1 mm in width on this wire mesh, and in addition, a total of two marked lines are written in advance from one end in the length direction to each position of 60 mm and 125 mm. Is installed. In the combustion test, after the test piece is placed horizontally, a flame is applied to the end portion described above from below the wire mesh for 60 ± 1 second, and then the flame is separated from the test piece. Time is measured from this point, [a] time when the flame disappears (residual flame), [b] time when the flame and red heat disappears (residual dust), [c] time when the front of the flame or red heat reaches the 125 mm mark Or, record three types of time, that is, the time when the test piece burns or stops red heat before the 125 mm mark. Such an evaluation test is performed five times, and evaluation is performed according to two classifications of “94HF-1” or “94HF-2” as shown in Table 1 below.

(Toluene removal rate)
Air having a toluene concentration of 5 ppm was passed through the filter sample at a wind speed of 10 cm / second, and the toluene concentrations (ppm) at the inlet and outlet sides of the column were measured. The measurement conditions were a temperature of 25 ° C. and a humidity of 50%. These measured values were substituted into the following equation to calculate the toluene removal rate (%). In addition, in order to obtain | require initial efficiency, the toluene removal rate in 1 minute after the measurement start was calculated | required.

Toluene removal rate (%) = {1− (exit side toluene concentration / inlet side toluene concentration)} × 100

(Ozone removal rate)
Air having an ozone concentration of 4 ppm was passed through the filter sample at a wind speed of 10 cm / second, and the ozone concentrations (ppm) at the inlet and outlet sides of the column were measured. The measurement conditions were a temperature of 25 ° C. and a humidity of 50%. These measured values were substituted into the following formula to calculate the ozone removal rate (%). In addition, in order to obtain | require initial efficiency, the ozone removal rate in 1 minute after the measurement start was calculated | required.

Ozone removal rate (%) = {1− (exit side ozone concentration / inlet side ozone concentration)} × 100

(Average particle diameter)
Each particle was observed with a scanning electron microscope (SEM), the diameter of 100 particles was measured, and the average diameter was calculated therefrom.

(Adjustment of flame retardant)
A flame retardant solution comprising 50 parts of a phosphorus-based flame retardant liquid (aqueous solution in which a flame retardant was dissolved in water: dispersion concentration 60%) and 50 parts of water was prepared.

(Preparation of cover material 1-1)
A rayon fiber / polyethylene terephthalate (hereinafter referred to as “PET”) fiber (weight ratio 70:30) mixed spunlace nonwoven fabric (weight per unit 24 g / m ² , thickness 0.16 mm) is impregnated with the flame retardant aqueous solution and dried. A cover material (A ₀ 1) having a basis weight of 34 g / m ² was obtained. The cover material is a cover material in which a phosphorus-based flame retardant is attached to the fiber surface of a spunlace nonwoven fabric, and the cover material (A ₀ 1) contains 10 g / m ² of a phosphorus-based flame retardant. It was.

(Granulation 1-1 of metal oxide particles)
Manganese dioxide (average particle diameter 2.0 μm, specific surface area 200 m ² / g) 30 g and sepiolite 10 g, 20 g, 90 g (dry weight 2 g, fiber diameter (average value of short side length) 0.2 μm, fiber length (Average length of the long side) 50 μm, average aspect ratio 250), 5 g, 6.25 g, and 15 g of water are added to each and further mixed, granulated, and the ratio of mineral binder is 25 wt%, 40 wt%, and 75 wt% of metal oxide particles B1, B2, and B3 were obtained.

(Granulation of metal oxide particles 1-2)
30 g of manganese dioxide (average particle size 100.0 μm, specific surface area 200 m ² / g) and sepiolite 10 g (dry weight 2 g, fiber diameter (average value of short side length) 0.2 μm, fiber length (long side length) The average value of 50 μm and the average aspect ratio of 250) were mixed well, and 5 g of water was added and further mixed and granulated to obtain metal oxide particles B4.

(Granulation of metal oxide particles 1-3)
30 g of manganese dioxide (average particle size 2.0 μm, specific surface area 200 m ² / g) and 3 g of water-soluble organic binder (sodium alginate) are mixed well, 5 g of water is added and further mixed, granulated, and metal oxide particles B5 was obtained.

(Granulation of metal oxide particles 1-4)
5 g of water was added to 30 g of manganese dioxide (average particle size: 2.0 μm, specific surface area: 200 m ² / g), mixed well, and granulated to obtain metal oxide particles B6.

Example 1
100 parts by weight of metal oxide particles B1 (average particle diameter 300 μm), 100 parts by weight of activated carbon (average particle diameter 200 μm) on the cover material (A ₀ 1) prepared in Cover Material Preparation 1, a thermoplastic resin binder A catalyst layer is formed by spraying a mixture of particles (average particle diameter 50 μm, PET resin) so as to be 15 parts by weight, and a cover material (A ₀ 1) is overlaid on the catalyst layer. Was sandwiched between iron plates heated to 140 ° C. and heat-pressed for 1 minute, and the catalyst layer was fixed with thermoplastic resin binder particles to produce a sheet-like filter. The basis weight of this filter was 283 g / m ² .

(Comparative Example 1)
A sheet-like filter was produced in the same manner as in Example 1 except that the metal oxide particles B4 were used instead of the metal oxide particles B1. The basis weight of this filter was 283 g / m ² .

(Comparative Example 2)
A sheet-like filter was produced in the same manner as in Example 1 except that the metal oxide particles B5 were used instead of the metal oxide particles B1. The basis weight of this filter was 283 g / m ² .

(Comparative Example 3)
A sheet-like filter was produced in the same manner as in Example 1 except that the metal oxide particles B6 were used instead of the metal oxide particles B1. The basis weight of this filter was 283 g / m ² .

The sheet of Comparative Example 3 had a partial adhesion failure between the cover material (A ₀ 1) and the catalyst particles, and was difficult to mold.

(Example 2)
100 parts by weight of metal oxide particles B2 (average particle diameter 300 μm), 100 parts by weight of activated carbon (average particle diameter 200 μm) on the cover material (A ₀ 1) prepared in Cover Material Preparation 1, thermoplastic resin binder A catalyst layer is formed by spraying a mixture of particles (average particle diameter 50 μm, PET resin) so as to be 15 parts by weight, and a cover material (A ₀ 1) is overlaid on the catalyst layer. Was sandwiched between iron plates heated to 140 ° C. and heat-pressed for 1 minute, and the catalyst layer was fixed with thermoplastic resin binder particles to produce a sheet-like filter. The basis weight of this filter was 283 g / m ² .

(Comparative Example 4)
100 parts by weight of metal oxide particles B2 (average particle diameter 300 μm), 100 parts by weight of activated carbon (average particle diameter 200 μm) on the cover material (A ₀ 1) prepared in Cover Material Preparation 1, thermoplastic resin binder A catalyst layer is formed by spraying a mixture of particles (average particle diameter of 50 μm, PET resin) so as to be 40 parts by weight, and a cover material (A ₀ 1) is overlaid on the catalyst layer. Was sandwiched between iron plates heated to 140 ° C. and heat-pressed for 1 minute, and the catalyst layer was fixed with thermoplastic resin binder particles to produce a sheet-like filter. The basis weight of this filter was 308 g / m ² .

(Comparative Example 5)
A sheet-like filter was produced in the same manner as in Example 2 except that the metal oxide particles B3 were used instead of the metal oxide particles B2. The basis weight of this filter was 283 g / m ² .

  Table 2 shows details of the configuration of the filters obtained in Examples 1 and 2 and Comparative Examples 1 to 5 and evaluation results of flame retardancy.

  As apparent from Table 2, since Comparative Example 1 has a larger particle size of manganese dioxide particles, which are metal oxide particles, compared to Example 1, the initial efficiency of the ozone removal performance is reduced. However, since no mineral binder is used when granulating the metal oxide, molding defects and catalyst performance are not fully exhibited. Moreover, since the ratio of the thermoplastic resin binder at the time of forming into a sheet is large in Comparative Example 4 with respect to Example 2, the flame retardancy and toluene removal performance are not sufficiently exhibited. In Comparative Example 5, in the metal oxide particles Since the ratio of the mineral binder is large, the ozone removal performance is not sufficiently exhibited.

  Since the flame-retardant deodorizing filter of the present invention is excellent in the removal of harmful gas components and flame retardancy, it is included in the exhaust gas of electronic devices such as copiers, printers, multifunctional OA machines, computers, projectors, and POD printing machines. It can be suitably used for a flame retardant deodorizing filter for removing contained harmful gas components, a flame retardant deodorizing filter used for a refrigerator, a toilet deodorizer, and the like.

1 Adsorbed material (catalyst particles)
2 Thermoplastic resin binder 3 Activated carbon particles 4 Metal oxide 5 Mineral binder A Catalyst layer B Organic fiber fabric

Claims (3)

  In a filter in which an adsorbate is sandwiched between organic fiber fabrics and the adsorbate is fixed with a thermoplastic resin binder, the adsorbate is a catalyst particle composed of metal oxide particles composed of a metal oxide and a mineral binder and activated carbon particles, The average particle diameter of the oxide particles is 0.01 to 50 μm, the content of the mineral binder in the metal oxide particles is 5 to 50% by weight with respect to the metal oxide, and the content of the thermoplastic resin binder is A flame-retardant deodorizing filter, which is 1 to 15 parts by weight with respect to 100 parts by weight of catalyst particles.   The flame-retardant deodorizing filter according to claim 1, wherein the metal oxide is at least one selected from the group consisting of manganese, copper, cobalt oxides and peroxides thereof.   The flame-retardant deodorizing filter according to claim 1 or 2, wherein the mineral binder is at least one selected from the group consisting of zeolite, sepiolite, bentonite, and activated clay.