JP2013031530A - Tobacco odor removing filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tobacco odor removing filter which has a great deodorant effect against tobacco odor, is low in pressure loss, and exhibits a superior performance of durability.SOLUTION: This filter includes: an inorganic silicon compound carrying a polyamine compound, and a hydrazide compound, both of which are adhered to a nonwoven fabric through a binder resin, wherein the filter has a pressure loss of 3 to 30 Pa per cm of filter thickness under a condition of a wind velocity of 1.0 m/sec for passing through the filter, when measured according to the JIS B9908. It has been found that the tobacco odor removing filter thus obtained has a great deodorant effect against tobacco odor, is low in pressure loss, and exhibits a superior performance of durability.

Description

  The present invention is used as a filter for household or commercial air conditioners, air purifiers, cigarette smoke separators, etc., or a filter for removing unpleasant odors in the interior of a car, etc., particularly tobacco odor (ammonia, acetaldehyde) , Acetic acid, etc.).

  Deodorizing filters are used in various applications. Deodorizing methods can be broadly classified into adsorption types that use adsorbents such as activated carbon and zeolite, and decomposition of malodorous substances using ozone, photocatalysts, metal phthalocyanine complexes, etc. It can be divided into a catalyst type to be removed or a combined type in which this adsorption type and catalyst type are used in combination. Among these, for example, techniques using the excellent adsorption action of activated carbon are well known, but these adsorb malodorous components and are excellent in reducing the odor concentration in the short term, but malodorous components This is not a decrease in the amount of odor, but is said to be a deodorizing method with a limited effective period. Recently, a catalyst type or a combination type that decomposes and removes malodorous substances is increasing.

  The applicant has applied for Patent Document 1 and includes a first deodorizing filter having a high pH environment and a second deodorizing filter having a low pH environment, and the first deodorizing filter is formed on activated carbon mixed paper. A deodorizing filter comprising a metal phthalocyanine complex and a hydrazine derivative, wherein the second deodorizing filter is a deodorizing filter comprising a charcoal mixed paper carrying a metal phthalocyanine complex and having a basic odor And an acidic odor are efficiently adsorbed and decomposed at the same time, and the cigarette odor has a great deodorizing performance.

JP 2007-229092 A

  The above technique is a combination of an adsorbent and a catalyst, and is a useful method for deodorizing efficiently by decomposing and deodorizing malodor adsorbed on the adsorbent with a catalyst. There has been a demand for a deodorizing filter that has a great deodorizing effect on odor, has a low pressure loss, and has good deodorizing durability.

  The present invention has been made in view of such a technical background, and an object thereof is to provide a tobacco odor removal filter having a great deodorizing effect on tobacco odor, low pressure loss, and excellent durability performance. And

  In order to achieve the above object, the present invention provides the following means.

[1] An inorganic silicon compound carrying a polyamine compound on a non-woven fabric and a hydrazide compound are fixed through a binder resin, and the pressure loss measured according to JIS B9908 standard is a condition that the passing air velocity of the filter is 1.0 m / sec. Below, the tobacco odor removal filter characterized by being 3-30 Pa per cm thickness of the filter.

[2] The tobacco odor removal filter according to item 1 above, wherein the nonwoven fabric is a thermal bond nonwoven fabric and the binder resin is a urethane resin.

[3] the tobacco odor removal filter according inorganic silicon compound carrying a polyamine compound to 50 to 500 g / ^{m 2,} item 1 or 2 in which the hydrazide compound 5 to 100 g / ^{m 2} is fixed to the nonwoven fabric.

[4] The tobacco odor removal filter according to any one of items 1 to 3, wherein the tobacco odor removal filter has a thickness of 1 to 10 mm.

In the invention of [1], the inorganic silicon compound carrying the polyamine compound and the hydrazide compound can be fixed through the binder resin while taking advantage of the breathability of the nonwoven fabric. Since the inorganic silicon compound carrying a polyamine compound is fixed to the nonwoven fabric, ammonia, acetic acid, etc., which are often found in tobacco odor, should be deodorized by a chemical reaction with the inorganic silicon compound carrying a polyamine compound. Can do. Furthermore, since the hydrazide compound is fixed, acetaldehyde can be deodorized by a chemical reaction with the hydrazide compound. In addition, since the inorganic silicon compound carrying the polyamine compound and the hydrazide compound are firmly fixed to the nonwoven fabric through the binder resin, the deodorizing performance can be maintained. Furthermore, since the pressure loss measured according to JIS B9908 standard is 3 to 30 Pa per 1 cm thickness of the filter under the condition that the passing wind speed of the filter is 1.0 m / second, for example, bad odors existing in the room, especially tobacco (Ammonia, acetaldehyde, acetic acid, etc.) can be quickly deodorized.

In the invention of [2], since the non-woven fabric is a thermal bond non-woven fabric, even if an inorganic silicon compound carrying a polyamine compound and a hydrazide compound are fixed via a binder resin, a decrease in air permeability can be suppressed. it can. Moreover, since the binder resin is a urethane-based resin, it can be firmly fixed, and a tobacco odor removal filter excellent in durability of the deodorizing effect can be provided.

[3] In the invention, the nonwoven fabric in the polyamine compound 50 to 500 g / ^{m 2} of an inorganic silicon compound carrying a, since the hydrazide compound 5 to 100 g / ^{m 2} secured, unpleasant odors, especially cigarette smell A tobacco odor removal filter that can sufficiently deodorize (ammonia, acetaldehyde, acetic acid, etc.) can be provided.

In the invention of [4], since the thickness of the tobacco odor removal filter is 1 to 10 mm, it is possible to provide a tobacco odor removal filter that is bulky and space-saving while ensuring a deodorizing performance, and that suppresses pressure loss. .

  Especially the tobacco odor removal filter of this invention adsorbs and purifies tobacco odor efficiently. Tobacco smoke is supposed to contain a mixture of 100 or more kinds of ammonia and the like. It is a cigarette odor removal filter that is particularly effective against ammonia, acetaldehyde, and acetic acid, which are said to occupy many of them, and has excellent durability.

  The nonwoven fabric of the tobacco odor removal filter of the present invention can be used without any particular limitation, and for example, a thermal bond nonwoven fabric, a needle punch nonwoven fabric, a water needle nonwoven fabric, a spunbond nonwoven fabric, etc. are used. , Not particularly limited, composed of synthetic fibers such as polyester fibers, polyamide fibers, polypropylene fibers, acrylic fibers, or natural fibers such as hemp, cotton, wool, etc., from the viewpoint of pressure loss Is preferably a thermal bond nonwoven fabric, and the material of the nonwoven fabric is preferably composed of synthetic fibers in terms of durability.

  The nonwoven fabric preferably has a thickness of 1 to 10 mm. If it is less than 1 mm, it becomes difficult to ensure the amount of fixing of the inorganic silicon compound carrying the polyamine compound, so that sufficient deodorizing performance cannot be obtained. If it exceeds 10 mm, it is difficult to ensure a sufficient amount of air passing, which may cause a reduction in deodorizing performance, and is not preferable in terms of cost.

The apparent density of the nonwoven fabric is preferably 0.01 to 0.1 g / cm ³ . If it is less than 0.01 g / cm ³ , it becomes difficult to secure the amount of the inorganic silicon compound carrying the polyamine compound, so that sufficient deodorizing performance cannot be obtained. If it exceeds 0.1 g / cm ³ , it is difficult to ensure a sufficient amount of air passage, which may cause a decrease in deodorizing performance, which is not preferable.

  The fineness of the fibers constituting the nonwoven fabric is preferably in the range of 5 to 50 dtex, and if it is less than 5 dtex, it is difficult to ensure air permeability and the deodorizing performance is also deteriorated. If it exceeds 50 dtex, it becomes difficult to ensure the amount of fixing of the inorganic silicon compound carrying the polyamine compound, so that sufficient deodorizing performance cannot be obtained. Among these, the fineness is more preferably in the range of 10 to 30 dtex.

  Examples of the inorganic silicon compound carrying a polyamine compound to be fixed to a nonwoven fabric according to the present invention include porous silicon dioxide carrying a polyamine compound. Porous silicon dioxide is preferable because it retains the internal amine compound even when dispersed in water. The particle size of the porous silicon dioxide is preferably 0.5 to 50 μm. If it is 0.5 μm or less, the amine compound is hardly supported in the pores of the porous silicon dioxide, and the cost is not preferred. Moreover, if it is 50 micrometers or more, since there exists a possibility that the dispersibility to the porous silicon dioxide in water may fall, it is not preferable. Further, the supported amount of the polyamine compound to the inorganic silicon compound is preferably 0.02 to 0.2 g / g. If it is less than 0.02 g / g, the deodorizing performance of the aldehyde is lowered, which is not preferable, and it is difficult to support an amount exceeding 0.2 g / g in the pores of porous silicon dioxide.

  The polyamine compound is not particularly limited, but the amine compound contained in the deodorizing filter of the present invention is an aliphatic amine as long as it has at least one primary amino group in the molecule. Any of aromatic amines and alicyclic amines can be used, and those having a boiling point of 100 ° C. or higher are preferred. A temperature of 100 ° C. or lower is not preferable because it may evaporate in the step of supporting the inorganic porous material. For example, since diethylenetriamine, triethylenetetramine, tetraethylenepentamine, and the like are liquids, they can be used in the process of supporting them on an inorganic porous material as they are. In the case of other amine compounds, an inorganic amine compound can be obtained by dissolving in water or the like, immersing the inorganic porous material, and drying by heating. Since the inorganic amine compound does not directly contact the water-insoluble hydrazine compound or activated carbon, the inorganic amine compound can exert its ability to deodorize aldehydes without being affected by these. In addition, rather than the direct reaction between the amine compound and the malodorous component, it is more efficient and the durability of the deodorizing effect is superior when it is once adsorbed on the inorganic porous material and reacted with the amine compound.

  The polyamine compound is particularly effective for deodorizing aldehyde gas, and the inorganic silicon compound is effective for deodorizing basic gas, and can effectively deodorize the combined odor of acetaldehyde and amine. .

  Examples of the hydrazide compound to be fixed to the nonwoven fabric of the present invention include those obtained by reacting a hydrazine compound and a long-chain aliphatic compound, or those obtained by reacting a hydrazine compound and an aromatic compound. It is done. Among them, one or two compounds selected from the group consisting of hydrazine and semicarbazide, and a group consisting of monocarboxylic acid having 8 to 16 carbon atoms, dicarboxylic acid, aromatic monocarboxylic acid, and aromatic dicarboxylic acid are selected. A reaction product with one or more compounds, or one or two compounds selected from the group consisting of hydrazine and semicarbazide, and a group consisting of monoglycidyl derivatives and diglycidyl derivatives having 8 to 16 carbon atoms. Reaction products with one or more compounds are preferred.

  By using such a hydrazine derivative, it is possible to cause a chemical reaction with aldehydes, exhibit an excellent adsorption action, and ensure a malodor removal performance. Specific examples of the reaction product include sebacic acid dihydrazide, dodecanoic acid dihydrazide, isophthalic acid dihydrazide, and the like. The solubility of such a hydrazine derivative in water is desirably 5 g / L or less at 25 ° C. If the solubility in water is within this range, the hydrazine derivative is prevented from dissolving and flowing out even if it comes into contact with water by washing or the like.

The adhesion amount of the inorganic silicon compound carrying the polyamine compound to the nonwoven fabric is preferably 50 to 500 g / m ² . If it is less than 50 g / m ² , the deodorizing performance is reduced, and if it exceeds 500 g / m ² , it is difficult to ensure a sufficient amount of air passage, which is not preferable. The amount of the hydrazide compound fixed to the nonwoven fabric is preferably 5 to 100 g / m ² . If it is less than 5 g / m ² , the deodorizing performance will be lowered, and if it exceeds 100 g / m ² , it will be difficult to ensure a sufficient amount of air passage, which is not preferable.

  Any resin can be used as the binder resin used in the present invention. For example, urethane resin, self-crosslinking acrylic resin, methacrylic resin, silicone resin, glyoxal resin, vinyl acetate resin, vinylidene chloride resin, butadiene resin, melamine resin, epoxy resin, acrylic-silicone copolymer resin, ethylene- Examples thereof include vinyl acetate copolymer resin, isobutylene maleic anhydride copolymer resin, and ethylene-styrene-acrylate-methacrylate copolymer resin. Two or more of these resins may be mixed to form a binder resin. Among these, urethane resin is preferable in terms of fixing force.

  In order to fix the inorganic silicon compound carrying the polyamine compound on the nonwoven fabric and the hydrazide compound via the binder resin, the polyamine compound and the inorganic silicon compound are uniformly dispersed in water in advance, and then dried. An inorganic silicon compound carrying a polyamine compound is prepared, and a treatment liquid comprising an inorganic silicon compound carrying a polyamine compound, a hydrazide compound, and an aqueous dispersion in which a binder resin is dispersed in water is prepared. You may mix | blend various additives, such as a dispersing agent and a thickener, with the said process liquid for a various characteristic improvement. The means for applying the treatment liquid to the nonwoven fabric is not particularly limited, and examples thereof include a spray method, a dipping method, a coating method, and a padding method.

  As described above, the treatment liquid is applied and then dried. As a drying means, a heat treatment method is preferable from the viewpoint of drying efficiency. The heat treatment temperature is preferably 100 to 180 ° C. By heat treatment at this temperature, it is possible to further improve the sticking property and further improve the durability of the malodor removal performance.

  The pressure loss of the tobacco odor removal filter of the present invention is 3 to 30 Pa per 1 cm thickness of the filter. If it is less than 3 Pa, it becomes difficult for the inorganic silicon compound carrying the polyamine compound on the nonwoven fabric to secure a fixed amount, so that sufficient deodorizing performance cannot be obtained. If it exceeds 30 Pa, it will be difficult to ensure a sufficient amount of air passage, and the deodorizing performance may be reduced.

  The thickness of the tobacco odor removal filter of the present invention is preferably 1 to 10 mm. If it is less than 1 mm, it will be difficult to secure the amount of inorganic silicon compound that carries the polyamine compound on the nonwoven fabric, so that sufficient deodorizing performance cannot be obtained. If it exceeds 10 mm, it is difficult to ensure a sufficient amount of air passing, which may cause a reduction in deodorizing performance, and is not preferable in terms of cost.

  Next, the present invention will be described specifically by way of examples. In addition, the measurement of various gas removal performance in an Example and a pressure loss test was performed as follows.

(Initial performance test)
A test piece (450 × 250 mm) cut out from the tobacco odor removal filter was fixed to a filter holder of an air purifier set with a fan that ventilates 800 liters per minute, and placed in an acrylic box with an internal capacity of 1 m ³ . Inject a gas in which ammonia, acetaldehyde, and acetic acid were mixed at a ratio of 1: 2: 1 so that the concentration would be 100 ppm in the box. After 5 minutes, the residual concentration of the mixed gas was measured, and the removal rate of the mixed gas. (%) Was calculated as the initial performance. “◎” if the removal rate is 90% or more, “◯” if the removal rate is 80% or more and less than 90%, “△” if the removal rate is 70% or more and less than 80%, What was less than 70% was set as “x”, and “○” or more was set as pass.

(Repeated durability test)
After the above performance test was repeated five times, the air cleaner was moved as it was, and after 30 minutes, the residual concentration of the mixed gas was measured, and the removal rate (%) of the mixed gas was calculated to be the durability performance. “◎” if the removal rate is 60% or more, “◯” if the removal rate is 50% or more and less than 60%, “△” if the removal rate is 40% or more and less than 50%, What was less than 40% was set to “x”, and “○” or more was set to pass.

(Pressure loss test)
Measured according to JIS B9908 format 3. That is, the tobacco odor removal filter was held in the unit fixing portion of the wind tunnel, the air blower was operated, and the filter surface wind speed was adjusted to 1.0 m / second. Next, the pressure loss per 1 cm thickness of the filter was calculated by measuring the static pressure upstream and downstream of the filter with a manometer connected to the static pressure measurement hole. The evaluation criteria were “◯” when the pressure loss was 30 Pa or less, “Δ” when more than 30 Pa and 35 Pa or less, and “X” when more than 35 Pa.

Next, examples of the present invention will be described, but the present invention is not particularly limited to these examples. In the table, the amount of sticking to the nonwoven fabric, etc.
Table 2 shows the results of various gas removal performances and pressure loss tests.

<Example 1>
180 parts by weight of silicon oxide having an average particle size of 10 μm, 20 parts by weight of a polyamine compound, and 200 parts by weight of water were added and stirred well, followed by drying at 120 ° C. for 30 minutes to obtain an inorganic silicon compound carrying the polyamine compound. Next, after adding 200 parts by weight of an inorganic silicon compound carrying a polyamine compound, 50 parts by weight of an hydrazide compound having an average particle size of 10 μm, and 150 parts by weight of water, the mixture is stirred with a stirrer and dispersed uniformly. Then, 10 parts by mass of a urethane-based binder resin (solid content 50%) was added and stirred well to obtain a treatment liquid. The treatment liquid was coated on a thermal bond nonwoven fabric (polyester fiber, basis weight 50 g / m ² , thickness 5 mm) using a doctor knife, and dried at 100 ° C. for 20 minutes to obtain a tobacco odor removal filter having a thickness of 5 mm. Adhesion amount of the non-woven fabric, inorganic silicon compound 90 g / m 2 was carrying a polyamine ^compound, a hydrazide compound 20 g / m ^2, a result of the pressure loss test, the pressure loss was 7 Pa.

<Example 2>
Next, a tobacco odor removal filter having a thickness of 2 mm was obtained in the same manner as in Example 1 except that a thermal bond nonwoven fabric (polyester fiber, basis weight 20 g / m ² , thickness 2 mm) was used. Adhesion amount of the non-woven fabric, inorganic silicon compound 72 g / m 2 was carrying a polyamine ^compound, a hydrazide compound 16g / m ^2, a result of the pressure loss test, the pressure loss was 5 Pa.

<Example 3>
Next, a tobacco odor removal filter having a thickness of 8 mm was obtained in the same manner as in Example 1 except that a thermal bond nonwoven fabric (polyester fiber, basis weight 80 g / m ² , thickness 8 mm) was used. Adhesion amount of the non-woven fabric, inorganic silicon compound 90 g / m 2 was carrying a polyamine ^compound, a hydrazide compound 20 g / m ^2, a result of the pressure loss test, the pressure loss was 9Pa.

<Example 4>
Next, a tobacco odor removal filter having a thickness of 5 mm was obtained in the same manner as in Example 1 except that a spunbonded nonwoven fabric (polyester fiber, basis weight 50 g / m ² , thickness 5 mm) was used. Adhesion amount of the non-woven fabric, inorganic silicon compound 54 g / m 2 was carrying a polyamine ^compound, a hydrazide compound 12 g / m ^2, a result of the pressure loss test, the pressure loss was 29 Pa.

<Example 5>
Next, a tobacco odor removal filter having a thickness of 5 mm was obtained in the same manner as in Example 1 except that acrylic binder resin (solid content 50%) was used. Adhesion amount of the non-woven fabric, inorganic silicon compound 90 g / m 2 was carrying a polyamine ^compound, a hydrazide compound 20 g / m ^2, a result of the pressure loss test, the pressure loss was 7 Pa.

<Example 6>
Next, a tobacco odor removal filter having a thickness of 5 mm was obtained in the same manner as in Example 1 except that the amount of coating adhered was adjusted using a doctor knife. Adhesion amount of the non-woven fabric, inorganic silicon compound 54 g / ^{m 2} was carrying a polyamine compound, a hydrazide compound 12 g / ^{m 2,} a result of the pressure loss test, the pressure loss was 4.5 Pa.

<Example 7>
Next, a tobacco odor removal filter having a thickness of 5 mm was obtained in the same manner as in Example 1 except that the amount of coating adhered was adjusted using a doctor knife. Adhesion amount of the non-woven fabric, inorganic silicon compound 210g / ^{m 2} was carrying a polyamine compound, a hydrazide compound 45 g / ^{m 2,} a result of the pressure loss test, the pressure loss was 18 Pa.

<Comparative Example 1>
Next, a tobacco odor removal filter having a thickness of 5 mm was obtained in the same manner as in Example 1 except that an inorganic silicon compound not carrying a polyamine compound was used in Example 1. Adhesion amount of the non-woven fabric, inorganic silicon compound 81 g / ^{m 2,} a hydrazide compound 20 g / ^{m 2,} a result of the pressure loss test, the pressure loss was 6.5 Pa.

<Comparative example 2>
Next, a tobacco odor removal filter having a thickness of 5 mm was obtained in the same manner as in Example 1 except that the polyamine compound was used without being supported on the inorganic silicon compound. The amount of adhesion to the nonwoven fabric was 9 g / m ² polyamine compound and 20 g / m ² hydrazide compound. As a result of the pressure loss test, the pressure loss was 3 Pa.

<Comparative Example 3>
Next, a tobacco odor removal filter having a thickness of 5 mm was obtained in the same manner as in Example 1 except that the hydrazide compound was not used. The adhesion amount to the nonwoven fabric was 90 g / m ² of an inorganic silicon compound carrying a polyamine compound, and as a result of a pressure loss test, the pressure loss was 6.5 Pa.

<Comparative example 4>
Next, a tobacco odor removal filter having a thickness of 12 mm was obtained in the same manner as in Example 1 except that a thermal bond nonwoven fabric (polyester fiber, basis weight 120 g / m ² , thickness 12 mm) was used. Adhesion amount of the non-woven fabric, inorganic silicon compound 90 g / m 2 was carrying a polyamine ^compound, a hydrazide compound 20 g / m ^2, a result of the pressure loss test, the pressure loss was 11 Pa.

<Comparative Example 5>
Next, a tobacco odor removal filter having a thickness of 60 mm was obtained in the same manner as in Example 1 except that a thermal bond nonwoven fabric (polyester fiber, basis weight 600 g / m ² , thickness 60 mm) was used. Adhesion amount of the non-woven fabric, inorganic silicon compound 90 g / m 2 was carrying a polyamine ^compound, a hydrazide compound 20 g / m ^2, a result of the pressure loss test, the pressure loss was 32 Pa.

  The technology of the present invention is used as a filter for household or commercial air conditioners, air purifiers, cigarette smoke separators, etc., or a filter for removing unpleasant odors in the interior of a vehicle or the like. , Acetaldehyde, acetic acid, etc.) are widely used as filters for efficiently adsorbing and purifying.

Claims (4)

  An inorganic silicon compound carrying a polyamine compound on a non-woven fabric and a hydrazide compound are fixed via a binder resin, and the pressure loss measured according to JIS B9908 standard is such that the air velocity passing through the filter is 1.0 m / sec. A tobacco odor removal filter characterized by being 3 to 30 Pa per 1 cm thickness of the filter.   The tobacco odor removal filter according to claim 1, wherein the nonwoven fabric is a thermal bond nonwoven fabric, and the binder resin is a urethane resin. Tobacco odor removal filter according polyamine compound an inorganic silicon compound carrying a 50 to 500 g / ^{m 2,} according to claim 1 or 2 in which the hydrazide compound was 5 to 100 g / ^{m 2} adhered to the nonwoven fabric.   The tobacco odor removal filter according to any one of claims 1 to 3, wherein the tobacco odor removal filter has a thickness of 1 to 10 mm.