JP2006322101A - Deodorant fabric - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a deodorant fabric capable of efficiently adsorbing and removing bad smell components in room air by natural air flow. <P>SOLUTION: The bad smell is efficiently adsorbed and decomposed with a deodorant fabric in natural convection by performing deodorant treatment on a fabric whose surface pH is made to be 6 to 8 and adhering a deodorizer on the fibers through a binder resin, which deodorizer comprises one or more compounds selected from hydrazine derivatives, one or more compounds selected from porous inorganic substances and one or more compounds selected from metallic oxides. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a deodorizing fabric that can efficiently adsorb and remove bad odors of basic gases such as ammonia and trimethylamine, and acidic gases such as hydrogen sulfide, methyl mercaptan, and acetic acid in indoor air.

  Houses constructed in recent years have significantly improved heat insulation and airtightness, and high-performance energy-saving houses have been born that take several times longer than conventional houses to change room air due to the flow of natural air. . However, because of its high airtightness, it is said that odors and house dust are likely to be trapped in the room. It has become a concern.

  Examples of such components that cause life odor include ammonia, hydrogen sulfide, methyl mercaptan, acetic acid, formaldehyde, and the like. Among these, components that cause tobacco odor include ammonia, hydrogen sulfide, acetaldehyde, Nicotine, pyridine and its derivatives are listed as typical malodors.

  In order to deal with such bad odor problems, deodorization, deodorization and dust collection using air conditioners and air purifiers have been carried out, and a method for collecting odors and dust in the air using filters etc. has been proposed. Has been. Patent Documents 1 to 3 propose interior fabrics such as carpets having a deodorizing function.

Patent Document 1 proposes a technique in which a hydrazine derivative and a deodorant inorganic substance are kneaded into a carpet backing. In Patent Document 2, a carpet having an adsorbent that adsorbs at least aldehydes to the carpet body is proposed. Patent Document 3 proposes a technique for applying a hydrazine derivative and a deodorizing inorganic substance to a primary base fabric of a carpet. These technologies apply deodorizing agents such as hydrazine to fibers and the like by applying them by a method such as dipping, spraying, printing, etc., and exhibit a good deodorizing effect. A highly effective deodorant fabric is desired.
Japanese Patent Application Laid-Open No. 11-113720 Japanese Patent Laid-Open No. 11-46965 JP 2000-14520 A

  This invention is made | formed in view of this technical background, Comprising: It aims at providing the deodorizing cloth which can adsorb | suck and remove the malodorous component of indoor air efficiently with the flow of natural air.

  As a result of intensive studies to solve such problems, the present inventors have applied a deodorizing process to fabrics having a PH value of 6 to 8 on the surface of the fabric, so that bad odors are caused by natural convection by the deodorizing fabric The present inventors have found that it is adsorbed and decomposed and can efficiently reduce malodors. In order to achieve the above object, the present invention provides the following means.

  [1] A fiber fabric having a PH value adjusted to 6 to 8 on the fabric surface, one or more compounds selected from hydrazine derivatives, one or more compounds selected from porous inorganic substances, and metal oxides A deodorant fabric characterized in that a deodorant comprising at least one compound selected from the above is attached via a binder resin.

  [2] The deodorizing fabric according to item 1, wherein the hydrazine derivative, the porous inorganic substance, and the metal oxide have a particle size of 10 μm or less.

[3] The deodorizing fabric according to item 1 or 2, wherein the deodorizing agent is applied in an amount of ² to 15 g / m ² .

  [4] The deodorizing fabric according to any one of items 1 to 3, wherein the deodorizing fabric is a chair upholstery, a curtain, or a carpet.

  [5] From a metal oxide, a fiber fabric whose PH value on the fabric surface is adjusted to 6 to 8, one or more compounds selected from hydrazine derivatives and one or more compounds selected from porous inorganic substances A method for producing a deodorant fabric characterized by impregnating a fabric with an aqueous solution containing a deodorant comprising one or more selected compounds and a binder resin, followed by drying by heating.

  According to the invention of [1], at least one compound selected from a hydrazine derivative and one or more selected from a porous inorganic substance are added to a fiber fabric having a PH value adjusted to 6 to 8 on the fabric surface. A deodorant composed of a compound and one or more compounds selected from metal oxides is attached to the fiber via a binder resin, so that both an acidic odor and a basic odor can be removed by natural convection. It is sucked and can effectively reduce malodor.

  According to the invention of [2], the deodorant comprises a hydrazine derivative having an average particle size of 10 μm or less, a porous inorganic substance, and a metal oxide, and is supported by a binder resin, so that it feels rough. In addition, it is possible to obtain a deodorant fabric that can sufficiently withstand washing and has a deodorizing effect continuously.

According to the invention [3], since the deodorant is applied in an amount of ² to 15 g / m ² , a deodorant fabric having a sufficient deodorizing effect can be obtained.

  According to the invention of [4], since the deodorizing fabric is a chair upholstery, a curtain, or a carpet, it is possible to remove the bad odor of indoor air in natural convection and keep it clean.

  According to the invention of [5], one or more compounds selected from one or more compounds selected from hydrazine derivatives and one or more compounds selected from porous inorganic substances on a fiber fabric having a PH value adjusted to 6 to 8 on the fabric surface And an aqueous solution containing a deodorant composed of one or more compounds selected from metal oxides and a binder resin, and the fabric is dried by heating, so that both acidic and basic odors are effective. A method for producing a deodorant fabric having a deodorizing performance can be provided.

  Next, an embodiment of the deodorizing fabric according to the present invention will be described. The fabric of this embodiment is not particularly limited, and examples thereof include woven fabrics, knitted curtains, chair upholstery fabrics, napped fabrics such as nonwoven fabrics, tufted carpets, and moquettes. Among them, it is preferable to contact with as many deodorizers as possible in natural convection because a deodorant efficiency is good, air permeability is good, and a thick fabric is suitable. The fibers forming the fabric are not particularly limited, and those made of fibers such as polyester fibers, polyamide fibers, polypropylene fibers, acrylic fibers, rayon fibers, etc. can be suitably used, and other natural materials such as hemp, cotton, wool, etc. Those made of fibers can also be used.

  In general, fabrics are often processed to provide various functionalities such as flame retardancy, insect repellency, and antifouling in addition to deodorant performance. By adding such processing, the pH value of the surface of the deodorant fabric is increased. May move to the acidic side or to the basic side, leading to a decrease in the deodorizing effect. When the pH value on the surface of the deodorant fabric fluctuates to the acidic side, the rate of removal of bad odors from the acid gas is reduced. The rate will drop. In the present invention, it is important to maintain the PH value of the fabric surface before the deodorizing process at 6 to 8, and the PH value of the fabric surface may be shifted to the acidic side by processing to impart various functionalities. If it is shaken, it is necessary to neutralize it by immersing it in an aqueous solution such as phosphate or citric acid. After adjusting the pH value of the fabric surface to 6 to 8, deodorizing treatment is performed. A deodorizing fabric that acts effectively on acid gas and basic gas and has high deodorizing efficiency can be obtained. There are various types of malodorous gases in the air in the room, and typical basic malodors include basic gases such as ammonia and trimethylamine. Examples of the acidic malodor include acidic malodor gases such as hydrogen sulfide, methyl mercaptan, and acetic acid.

  In the present invention, the hydrazine derivative constituting the deodorant is, for example, a product obtained by reacting a hydrazine compound and a long-chain aliphatic compound, or a product obtained by reacting a hydrazine compound and an aromatic compound. Etc. 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, excellent malodor removal performance can be ensured. Specific examples of the reaction product include sebacic acid dihydrazide, dodecanoic acid dihydrazide, and isophthalic acid dihydrazide. However, the reaction product is not particularly limited to these exemplified compounds. 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.

  In the present invention, the porous inorganic substance constituting the deodorant has a large surface area because of its porosity, and has an excellent malodor adsorption ability. For example, as such a porous inorganic substance, the above-mentioned activated carbon, zeolite, etc. are mentioned. Among these, it is preferable to use a zeolite having an excellent adsorption ability for acetic acid, ammonia and the like. In addition, zeolite is white and has a smaller influence on the color of the fabric than activated carbon when it is supported on a fiber, which is favorable.

  In the present invention, examples of the metal oxide constituting the deodorant include metal oxides such as alumina, titanium oxide, zinc oxide, and iron oxide, but are not particularly limited to those exemplified. Absent. By using such a porous inorganic substance or metal oxide in combination, it is possible to effectively deodorize bad odors coming into contact with the deodorizing fabric by natural convection in combination with the action of the hydrazine derivative. The mixing ratio of the hydrazine derivative, the porous inorganic substance, and the metal oxide is not particularly limited. However, when the amount of the metal oxide such as titanium oxide increases, the probability of binding to the metal oxide fiber fabric increases and the fiber fabric deteriorates. Cause it. Moreover, when the compounding quantity of porous inorganic substances, such as a zeolite, increases, a fabric will whiten and it is unpreferable. When the amount of the binder resin increases, the surface of the porous inorganic substance or metal oxide becomes covered with the binder resin, and the deodorizing performance is lowered. Therefore, the porous inorganic substance, metal oxide, and hydrazine are reduced. The balance between the combination of the derivative and the binder resin is important.

  As the deodorant, a deodorant composed of a hydrazine derivative, a porous inorganic substance, and a metal oxide having an average particle size of 10 μm or less is preferable. Since the average particle size is 10 μm or less, it is possible to obtain a deodorized fabric having a good texture without feeling rough when it is carried on the fabric. Among these, the average particle size is preferably 5 μm or less, and particularly preferably 3 μm or less.

The application amount of the deodorant is preferably ^{2 to} 15 g / m ² (dry weight). Less than 2 g / m ² is not preferable because sufficient removal performance cannot be obtained. Moreover, even if it exceeds 15 g / m < ² >, there is no big improvement in deodorization performance, and it will increase cost easily, and is not preferable.

  In the method of applying the deodorant, first, a treatment liquid composed of an aqueous dispersion is prepared by dispersing the deodorant and a binder resin in water. At this time, it is preferable to disperse these deodorants and binder resin as much as possible, and it is more preferable that the binder resin forms an emulsion state with water. In addition, it is preferable to disperse the deodorant in water before mixing and then disperse the binder resin in order to more uniformly disperse the deodorant and the binder resin.

  As the binder resin, any resin can be used. For example, self-crosslinking acrylic resin, methacrylic resin, urethane 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, ethylene-styrene-acrylate-methacrylate copolymer resin, and the like. Two or more of these resins may be mixed to form a binder resin.

  Moreover, you may mix | blend various additives, such as a dispersing agent and a thickener, with the said deodorizer for various characteristic improvement. The deodorant thus obtained is applied to a fabric such as a carpet or a curtain. The means for applying is not particularly limited, and examples thereof include a spray method, a dipping method, a coating method, and a padding method. In the case of carpet, the application time may be a single state of the pile yarn, the base fabric, and the backing layer, or the treatment solution may be applied in the form of a skin layer in which the pile yarn is laid on the base fabric. Alternatively, the surface layer and the backing layer may be bonded and integrated with each other through the adhesive layer. Moreover, it is good also as a sealing layer which has a deodorizing function by mixing a deodorizing agent in the process liquid of a sealing layer, and apply | coating with a spray or roller coating. In the case of a curtain, it may be applied by a spraying method after sewing, or may be applied and dried by a dipping method, a coating method, a padding method or the like in a fabric state.

  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 the heat treatment at this temperature, it is possible to further improve the sticking property of the deodorant and further improve the durability of the malodor removal performance.

<Example 1>
Next, as an example of the present invention, a flame-retardant nonwoven fabric obtained by neutralizing with a sodium phosphate aqueous solution and drying a polyester spunbonded nonwoven fabric (weight per unit: 135 g / m ² PH5) treated with guanidine phosphate. (PH7) was prepared. Next, 2.5 parts by mass of titanium oxide having an average particle diameter of 10 nm, 1.5 parts by mass of zeolite having an average particle diameter of 5 μm, and 0.5 parts by mass of sebacic acid dihydrazide having an average particle diameter of 1 μm were added to 85.5 parts by mass. After adding to water, stirring was performed with a stirrer to obtain a dispersion. 10 parts by mass of an acrylic silicon binder resin (solid content 25%) was further added to this dispersion, and the mixture was stirred well to obtain a uniform treatment liquid. This treatment liquid was applied by roller coating with 100 g / m ² to the flame retardant nonwoven fabric (PH7) and then dried at 130 ° C. for 15 minutes to obtain a flame retardant deodorant fabric. The amount of titanium oxide attached to the spunbonded nonwoven fabric is 2.5 g / m ² , the amount of zeolite attached to the fiber fabric is 1.5 g / m ² , and the amount of sebacic acid dihydrazide attached to the fiber fabric is 0.5 g / m ² . It was m ^2. The deodorant fabrics thus obtained were subjected to the following deodorization tests for various gases, and the removal rates are shown in Table 1.

<Example 2>
In Example 1, 2 mass parts of titanium oxide having an average particle diameter of 10 nm and 2 mass of zeolite having an average particle diameter of 10 μm were added to a polyester spunbonded nonwoven fabric (weight per unit: 135 g / m ² PH6.5) not subjected to flame retardant treatment. And 4 parts by weight of sebacic acid dihydrazide having an average particle diameter of 2 μm were added to 82 parts by weight of water, and then a deodorant fabric was obtained in the same manner as in Example 1 except that stirring was performed with a stirrer. Table 1 shows the adhesion amount, PH value, and removal rate of various gases.

<Example 3>
In Example 1, instead of the spunbonded nonwoven fabric (weight per unit: 135 g / m ² ), a nylon loop carpet (weight per unit: 800 g / m ² ) was used, 5 parts by mass of titanium oxide having an average particle size of 10 nm, and zeolite 3 having an average particle size of 10 μm. A deodorized carpet was obtained in the same manner as in Example 1 except that 1 part by weight of sebacic acid dihydrazide having an average particle diameter of 2 μm was added to 81 parts by weight of water and then stirred with a stirrer. . Table 1 shows the adhesion amount, PH value, and removal rate of various gases.

<Example 4>
A deodorant fabric was obtained in the same manner as in Example 1 except that dodecanedioic acid dihydrazide was used instead of sebacic acid dihydrazide, zinc oxide was used instead of titanium oxide, and silica was used instead of zeolite. Table 1 shows the adhesion amount, PH value, and removal rate of various gases.

<Comparative Example 1>
In Example 1, a deodorizing fabric was obtained in the same manner as in Example 1 except that the neutralization treatment was not performed. Table 1 shows the adhesion amount, PH value, and removal rate of various gases.

<Comparative Example 2>
In Example 1, a deodorant fabric was obtained in the same manner as in Example 1 except that 1 part by mass of titanium oxide was changed to 0. Table 1 shows the adhesion amount, PH value, and removal rate of various gases.

<Comparative Example 3>
A deodorant fabric was obtained in the same manner as in Comparative Example 1 except that the amount of the deodorant was tripled in Comparative Example 1. Table 1 shows the adhesion amount, PH value, and removal rate of various gases.

<Comparative example 4>
Example 1 Example 1 except that a non-flammable polyester spunbond nonwoven fabric (weight per unit: 135 g / m ² PH6.5) was treated with a sodium phosphate aqueous solution and dried (PH9) was prepared. In the same manner as in Example 1, a deodorant fabric was obtained. The removal rates of various gases are shown in Table 1.

<Deodorization test>
In addition, the measurement of the various deodorizing performance in the said example was performed as follows.
(Ammonia deodorization performance)
After putting a test piece (10 cm × 20 cm) in a bag having an internal volume of 500 ml, ammonia gas was injected so that the concentration in the bag was 200 ppm, and after 1 hour, the residual concentration of ammonia gas was measured. The total amount of ammonia gas removed was calculated from the measured value, and the ammonia gas removal rate (%) was calculated from this.

(Hydrogen sulfide deodorization performance)
The removal rate (%) of hydrogen sulfide was calculated in the same manner as the ammonia deodorization performance measurement except that hydrogen sulfide gas was used instead of ammonia gas so that the concentration in the bag was 20 ppm.

(Methyl mercaptan deodorization performance)
A methyl mercaptan gas was used instead of ammonia gas so that the concentration was 40 ppm in the bag, and the remaining concentration of the methyl mercaptan gas was measured after 4 hours. The removal rate (%) of methyl mercaptan gas was calculated.

(Acetic acid deodorization performance)
The acetic acid gas removal rate (%) was calculated in the same manner as in the ammonia deodorizing performance measurement except that acetic acid gas was used instead of ammonia gas and the concentration was 100 ppm in the bag.

And, “◎” when the removal rate is 95% or more, “◯” when the removal rate is 80% or more and less than 95%, “△” when the removal rate is 70% or more and less than 80%, Those having a removal rate of less than 70% were evaluated as “x”, and the results shown in Table 1 were obtained.

Claims (5)

  A fiber fabric having a PH value adjusted to 6 to 8 on the fabric surface is selected from one or more compounds selected from hydrazine derivatives, one or more compounds selected from porous inorganic substances, and metal oxides. A deodorant fabric characterized in that a deodorant comprising at least one compound is attached via a binder resin.   The deodorizing cloth according to claim 1, wherein the hydrazine derivative, the porous inorganic substance, and the metal oxide have a particle size of 10 µm or less. The deodorant cloth according to claim 1 or 2, wherein the deodorant is applied in an amount of ² to 15 g / m2.   4. The deodorizing fabric according to claim 1, wherein the deodorizing fabric is a chair upholstery, a curtain, or a carpet.   A fiber fabric having a PH value adjusted to 6 to 8 on the fabric surface was selected from one or more compounds selected from hydrazine derivatives, one or more compounds selected from porous inorganic substances, and metal oxides. A method for producing a deodorant fabric characterized by impregnating a fabric with an aqueous solution containing a deodorant comprising one or more compounds and a binder resin, followed by drying by heating.