JP2010265561A - Fiber fabric having deodorization and voc removing function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fiber product that is obtained by sticking a photocatalyst and an adsorbent fast to a fiber fabric with a binder resin, completely prevents discoloration, deterioration and secondary contamination of fiber fabric by oxidation action of a photocatalyst while maintaining a soft touch of fiber fabric and exhibits excellent performance of deodorization and VOC (volatile organic compound) removing function. <P>SOLUTION: The fiber product having excellent deodorization and VOC removing function even indoors and a soft touch is obtained by sticking a photocatalyst and an adsorbent fast to a fiber fabric by using a binder resin having a light transmittance at a wavelength of 300-500 nm of ≥50%. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  INDUSTRIAL APPLICABILITY The present invention can be widely applied as interior textile fabrics such as curtains, carpets, wallpaper, chair upholstery, etc., and interior textile fabrics such as automobiles, vehicles, ships, and aircraft, and has a deodorizing and VOC removal function. This is a technique related to fiber fabrics.

  In recent years, as represented by sick house syndrome, the problem of living environment pollution due to harmful substances generated from residential building materials has rapidly become serious, and not only formaldehyde but also persistent VOCs having aromatic rings such as toluene and xylene ( Volatile organic compounds) have also been regulated by indoor air environmental guidelines.

  Many technologies related to functions such as VOC removal, deodorization, and antibacterial have been disclosed. Photocatalysts decompose halogen-containing organic substances in water into carbon dioxide gas and water, and produce cigarette odors and human sweat odors. It has been confirmed that it has the function of deodorizing malodors such as herbic acid and killing Escherichia coli by its strong oxidizing power. It is also known that photocatalysts have the ability to decompose VOC (volatile organic compounds) into carbon dioxide gas and water. For example, photocatalysts are supported on fiber fabrics such as curtains, carpets, wallpaper, and upholstery. Attempts to decompose bad odors and harmful substances using ultraviolet rays or visible light have been widely conducted.

  However, the photocatalyst has such a useful function, but when the photocatalyst is directly supported on the fiber cloth by the binder resin, the binder resin or the fiber cloth is a resin containing organic hydrocarbons due to the strong oxidative degradation power of the photocatalyst. For this reason, various problems such as decomposition, coloring, and generation of a strange odor have occurred. Therefore, the use of the photocatalyst is limited, and it has been applied to inorganic supporting materials such as tiles and glass that are resistant to oxidation, and is often used outdoors.

  In addition, when the photocatalyst is used indoors, the amount of ultraviolet rays present in the room is very small, and it is difficult to completely decompose a hardly decomposable substance such as toluene and xylene into carbon dioxide gas and water. Will be produced, and it may create secondary harmful substances and cause secondary contamination. Even when a photocatalyst that responds to visible light is used, the energy is weak in visible light, and it is difficult to decompose VOC (volatile organic compounds) into carbon dioxide and water at once, generating intermediates and secondary contamination. Will do.

  In order to improve these, in Patent Document 1, a titanium oxide photocatalyst is fixed to a fiber cloth with a silicone cross-linking resin, so that the fiber cloth is not discolored or deteriorated during use, and has excellent deodorant, antibacterial and antibacterial properties. A technique of a fiber fabric having an antifouling function is disclosed.

  In Patent Document 2, an indoor interior material having a binder and a photocatalyst selected from alkyl silicate resin, silicone resin, and fluorine resin on the surface of the fiber fabric is proposed, and has a durable odor prevention property, deodorization property, The technology of interior and interior materials with excellent antibacterial and antifouling properties is disclosed.

  However, in the method using these binder resins, the surface of the photocatalyst is covered with the binder resin, so that the catalytic ability is lowered and a sufficient effect cannot be exhibited.

JP-A-10-1879 JP 2001-254281 A

  In view of the above-mentioned circumstances, the problem of the present invention is to maintain the soft texture of the fiber fabric, completely prevent discoloration, deterioration and secondary contamination due to the oxidation action of the photocatalyst, and prevent the photocatalyst from being degraded by the binder. An object of the present invention is to provide a fiber fabric excellent in odor and VOC removal function.

  The present invention has been studied to provide a fiber fabric having a deodorizing, antibacterial, and VOC removal function that maintains the soft texture of the fiber fabric and completely prevents discoloration, deterioration, and secondary contamination. A fiber with a soft texture excellent in deodorization and VOC removal function even indoors by supporting a visible light responsive photocatalyst and an adsorbent on a fiber fabric with a binder resin having a rate of 50% or more at a wavelength of 300 to 500 nm The present inventors have found that a fabric can be obtained and have reached the present invention. In order to achieve the above object, the present invention provides the following means.

[1] Deodorization and VOC removal, wherein the photocatalyst and the adsorbent are fiber fabrics fixed with a binder resin, and the light transmittance of the binder resin is 50% or more at a wavelength of 300 to 500 nm. A fiber fabric having a function.

[2] Deodorization and VOC removal function according to item 1 above, wherein an apparent average particle size in the liquid of the photocatalyst is 80 nm to 3 μm, and an average particle size of the adsorbent is 20 nm to 30 μm. A fiber fabric having

[3] The fiber fabric having a deodorizing and VOC removing function according to the above item 1 or 2, wherein the binder resin is a urethane resin or a polyvinyl alcohol resin.

[4] The photocatalyst is a visible light responsive photocatalyst coated with apatite, and the adsorbent is a hydrophobic zeolite. Fiber fabric.

[5] The amount of the photocatalyst attached to the fiber fabric is 0.5 to 25% by weight with respect to 100 parts by weight of the fiber fabric, and the amount of the adsorbent attached to the fiber fabric is 100 parts by weight of the fiber fabric. The fiber fabric having a deodorizing and VOC removing function according to any one of the preceding items 1 to 4, which is 0.1 to 15% by weight.

[1] Since the photocatalyst and the adsorbent are fixed to the fiber fabric by the binder resin having a light transmittance of 50% or more at a wavelength of 300 to 500 nm, the influence of the binder resin on the catalytic reaction of the photocatalyst is reduced, and the catalytic reaction Is sufficiently performed, and the intermediate produced in the process of the photocatalytic reaction is also efficiently adsorbed by the adsorbent, so that the secondary contamination by the intermediate is suppressed, and the fiber fabric exhibiting the deodorizing and VOC removing functions can do.

[2] Since the apparent average particle diameter in the liquid of the photocatalyst is 80 nm to 3 μm and the average particle diameter of the adsorbent is 20 nm to 30 μm, it is possible to make a soft fiber fabric without a feeling of roughness.

[3] Furthermore, since the photocatalyst and the adsorbent are fixed by a urethane resin or a polyvinyl alcohol resin, a fiber fabric having a soft texture can be obtained.

[4] Since the photocatalyst is an apatite-coated type visible light responsive photocatalyst, the binder resin is prevented from being deteriorated by the influence of the photocatalytic reaction, and the adsorbent is a hydrophobic zeolite, so that moisture adsorption is achieved. Therefore, even in an atmosphere with high humidity, it is possible to quickly and effectively adsorb bad odors and intermediates produced during the photocatalytic reaction.

[5] The amount of the photocatalyst attached to the fiber fabric is 0.5 to 25% by weight with respect to 100 parts by weight of the fiber fabric, and the amount of the adsorbent attached to the fiber fabric is 100 parts by weight of the fiber fabric. Since it is 0.1-15 weight%, the secondary contamination by an intermediate body is suppressed and the fiber fabric which has sufficient deodorizing and a VOC removal function can be obtained.

  INDUSTRIAL APPLICABILITY The present invention can be widely and effectively used as interior fabrics such as curtains, carpets, wallpaper, and chair upholstery fabrics, and interior fabric fabrics such as automobiles, vehicles, ships, and aircraft. The form of the fiber fabric is not particularly limited, such as a woven fabric, a knitted fabric, a nonwoven fabric, a napped fabric such as a tufted carpet or a moquette. The fibers of the fiber fabric are not particularly limited, but are selected from one or more selected from synthetic fibers such as polyester, polyamide and acrylic, semi-synthetic fibers such as acetate and rayon, natural fibers such as wool, silk, cotton and hemp. Of fiber can be used.

  The photocatalyst exhibits a deodorizing and VOC removal function when irradiated with ultraviolet rays, but is covered with a binder resin and fixed to the fiber fabric, so that the amount of irradiation of the ultraviolet photocatalyst is reduced and the photocatalytic ability is not fully exhibited. There was a thing. In the present invention, since the photocatalyst and the adsorbent are fixed to the fiber fabric by the binder resin having a light transmittance of 50% or more at a wavelength of 300 to 500 nm, the irradiation amount to the photocatalyst is ensured and the photocatalytic ability is sufficiently high. It is demonstrated. When the light transmittance is 50% or more at a wavelength of 300 to 500 nm, the excitation energy of the photocatalyst is ensured, and a fiber fabric having a sufficient deodorizing and VOC removal function can be obtained.

  As the binder resin having a light transmittance of 50% or more at a wavelength of 300 to 500 nm, a urethane resin or a polyvinyl alcohol resin is suitable, and shows an excellent light transmittance even when compared with a silicone-based binder resin or the like. The light transmittance was measured with a spectrophotometer (UV-1700, manufactured by Shimadzu Corporation).

Examples of the photocatalyst include titanium oxide, tin oxide, zinc oxide, and ferric oxide. Photocatalyst is excited by ultraviolet rays, water and oxygen OH or - O ₂ ^-, and the organic matter with a strong oxidizing action, decomposes into water and carbon dioxide, is intended to deodorization. In addition, in order to increase the catalytic activity of the photocatalyst, one carrying a platinum group metal such as platinum, palladium or rhodium or one carrying a sterilizing metal such as silver, copper or zinc can be used. .

  As the photocatalyst used in the present invention, a visible light responsive photocatalyst is suitable. Above all, the visible light responsive titanium oxide photocatalyst is known to have bactericidal activity against Staphylococcus aureus due to its oxidizing power, and it suppresses the bad odor that occurs when the bacteria decompose human metabolites etc., and has an antibacterial effect Can also be obtained. In addition, the visible light responsive titanium oxide photocatalyst provides a strong oxidizing action even indoors where the amount of UV irradiation is small, and can easily deodorize tobacco odors, sweat odors, etc. In addition, it is possible to obtain an antifouling effect such as decomposing colored substances such as cigarette dust, and to obtain a VOC removal function.

  The visible light responsive titanium oxide photocatalyst is excited in the visible light region, and examples include anatase type titanium oxide photocatalyst, rutile type titanium oxide photocatalyst, brookite type titanium oxide photocatalyst, etc. A type of visible light responsive titanium oxide photocatalyst is particularly suitable.

  In the present invention, an apatite-coated visible light responsive titanium oxide photocatalyst can also be used as the visible light responsive titanium oxide photocatalyst. The apatite-coated visible light responsive titanium oxide photocatalyst is a composite material in which the surface of the titanium oxide photocatalyst is coated with calcium phosphate apatite or the like. The apatite-coated visible light responsive titanium oxide photocatalyst prevents the visible light responsive titanium oxide photocatalyst from being directly bonded to the fiber cloth or binder resin, and protects the fiber cloth or binder resin from being attacked by a strong oxidizing action. .

  Although the mechanism of the present invention has not been fully elucidated, the visible light responsive photocatalyst is fixed to the fiber fabric by a binder resin, exhibits deodorization performance, and decomposes VOC, but cannot be decomposed into carbon dioxide and water. Since the intermediate is captured by the adsorbent supported on the fiber fabric by the binder resin in the same manner as the visible light responsive photocatalyst, the VOC removal function can be exhibited without allowing the intermediate to escape into the atmosphere. The intermediate once trapped by the adsorbent is finally decomposed into carbon dioxide and water by the visible light responsive photocatalyst.

  The apparent average particle diameter in the liquid of the photocatalyst is preferably 80 nm to 3 μm. The particle size of the photocatalyst is preferably as small as possible due to the effect of oxidation, and a particle size of 1/10 or less of the fiber diameter is preferable from the viewpoint of easy removal, and 2 μm or less is recommended. On the other hand, if the particle size of the titanium oxide photocatalyst exceeds 3 μm, the decomposition rate of malodor is slow, which is not preferable. Moreover, it is not preferable to make the particle diameter smaller than 80 nm because the cost is not suitable. More preferably, it is 100 nm-2 micrometers, More preferably, 100 nm-1 micrometer are good.

  The adhesion amount of the photocatalyst to the fiber fabric is preferably 0.5 to 25% by weight with respect to 100 parts by weight of the fiber fabric. If the amount of the photocatalyst attached to the fiber cloth exceeds 25% by weight, the texture becomes hard and the fiber cloth is whitened. On the other hand, if it is less than 0.5% by weight, the bad odor and the decomposition rate of VOC are slow, which is not preferable. More preferably, it is 0.7 to 10% by weight.

  Next, examples of the adsorbent include zeolite, activated carbon, silica gel, silicon oxide and the like. Among these, hydrophobic zeolite is white, and therefore, it is preferable for interior textile fabrics that place importance on color and design. In general, zeolite is hydrophilic, but hydrophobic zeolite is preferred in the present invention. Hydrophobic zeolite has little moisture adsorption, so it can quickly and effectively adsorb odors and intermediates produced in the process of photocatalytic reaction even in a humid atmosphere.

  The average particle size of the hydrophobic zeolite is preferably 20 nm to 30 μm. When the particle size of the hydrophobic zeolite exceeds 30 μm, the fiber fabric becomes hard, which is not preferable. In addition, it is difficult to technically produce a particle size of less than 20 nm, which is not preferable because it is not cost effective. More preferably, it is 100 nm to 10 μm.

  Next, the adhesion amount of the adsorbent to the fiber fabric is preferably 0.1 to 15% by weight with respect to 100 parts by weight of the fiber fabric. If the adhering amount of the adsorbent to the fiber fabric exceeds 15% by weight, the texture becomes hard and the fiber fabric is whitened. On the other hand, if it is less than 0.1% by weight, the ability to adsorb intermediates and offensive odors is insufficient. More preferably, it is 0.5 to 10% by weight.

  Examples of the method for supporting the photocatalyst and the adsorbent on the fiber fabric with the binder resin include an immersion method and a coating method. Since the urethane-based binder resin and the polyvinyl alcohol resin are water-soluble, a mixed liquid of a photocatalyst and an adsorbent can be easily obtained.

  In the dipping method, the fiber fabric is immersed in a mixed solution of a binder resin, a photocatalyst, and an adsorbent, then squeezed with a mangle, and dried to support the photocatalyst and the adsorbent on the fiber fabric and can be uniformly supported. .

  In the coating method, the fiber fabric is coated with a mixed solution of a binder resin, a photocatalyst, and an adsorbent, and then dried to support the photocatalyst and the adsorbent on the fiber fabric. Highly controllable. The coating method is not particularly limited, and examples thereof include gravure roll processing, spray processing, roll coater processing, jet print processing, transfer print processing, and screen print processing.

  Further, the coating method is useful as a processing method capable of adhering the binder resin in a mesh form rather than forming a film-like layer on the fiber fabric and adhering the entire surface. This is because the flexibility of the fiber fabric is ensured because the yarns constituting the fiber fabric can move relatively by adhering the binder resin as a layer instead of adhering to the whole surface in a mesh form. And the place as a part which provides functionalities other than deodorant, antibacterial, and antifouling can be left to a textile fabric, and functions, such as a flame retardance, water repellency, and oil repellency, can further be provided.

  The mixing ratio of the photocatalyst, the adsorbent and the binder resin is not particularly limited. However, if the amount of the photocatalyst increases, the probability of binding to the photocatalyst fiber fabric tends to deteriorate, and the fiber fabric tends to deteriorate. As the ratio increases, the rate of binding between the photocatalyst and the binder resin increases, the probability of covering the surface of the photocatalyst increases, and the deodorizing, antibacterial, and antifouling functionality tends to decrease, so the photocatalyst, adsorbent, and binder It is better to determine the balance of the three resin components.

Next, the present invention will be described specifically by way of examples. In addition, the measurement of various deodorizing performance in an Example was performed as follows.
(Ammonia deodorization performance)
A fiber fabric (10 × 10 cm square) carrying a photocatalyst and an adsorbent is placed in a tetra-bag bag having a content of 2 liters, and then ammonia gas is injected so that the concentration in the bag is 100 ppm. Installed 30 cm directly under the lamp (Toshiba 10W FL10N), measured the residual concentration of ammonia gas after 2 hours, calculated the total amount of ammonia gas removed from this measured value, from this the removal rate of ammonia gas ( %) Was calculated.

(Hydrogen sulfide deodorization performance)
The removal rate (%) of hydrogen sulfide gas was calculated in the same manner as in the ammonia deodorization performance measurement except that hydrogen sulfide gas was used instead of ammonia gas and the concentration was 10 ppm in the bag.

(Methyl mercaptan deodorization performance)
The methyl mercaptan gas removal rate (%) was calculated in the same manner as in the ammonia deodorization performance measurement, except that methyl mercaptan gas was used instead of ammonia gas and the concentration was 10 ppm in the bag.

(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 10 ppm in the bag.

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

(Formaldehyde deodorization performance)
The removal rate (%) of formaldehyde was calculated in the same manner as in the ammonia deodorization performance measurement, except that formaldehyde gas was used instead of ammonia gas and the concentration was 10 ppm in the bag.

(Toluene deodorization performance)
The toluene removal rate (%) was calculated in the same manner as the ammonia deodorization performance measurement, except that toluene gas was used instead of ammonia gas and the concentration was 15 ppm in the bag.

  The removal rate is 95% or more, “」 ”, the removal rate is 90% or more and less than 95%,“ ◯ ”, the removal rate is 85% or more and less than 90%,“ △ ”, Those having a removal rate of less than 85% were evaluated as “x”, and 85% or more was regarded as acceptable.

(Texture measurement)
The sensory evaluation is “◎” when there is almost no change in hardness and roughness compared to the unprocessed product, “○” when there is a slight change but practically acceptable, and it is harder and more rough than the unprocessed product. Those with a sense of practicality and problems in practical use were evaluated as “x”.

<Example 1>
After adding 1 part by weight of a visible light responsive titanium oxide photocatalyst having a particle diameter of 150 nm and 1 part by weight of hydrophobic zeolite having an average particle diameter of 5 μm to 78 parts by weight of water, stirring was performed with a stirrer to obtain a dispersion. . Further, 20 parts by weight of a urethane binder resin (light transmittance is 50 to 80% at a wavelength of 300 to 500 nm, solid content 50%) is added to this dispersion and stirred well to obtain a uniform dispersion (treatment liquid). It was. A polyester spunbonded nonwoven fabric (weight per unit area: 40 g / m ² ) was immersed in this treatment liquid, and then taken out, squeezed with a mangle and dried to obtain a deodorized fiber fabric. The attached amount of the visible light responsive titanium oxide photocatalyst to the spunbonded nonwoven fabric was 1.5% by weight of the deodorized fiber fabric, and the attached amount of the hydrophobic zeolite was 1.5% by weight. The deodorant fiber fabric thus obtained was subjected to the above-mentioned deodorization tests for various gases, and the removal rate and feel evaluation are shown in Table 1. The composition of the dispersion is shown in Table 2.

<Example 2>
Next, the same procedure as in Example 1 was performed except that 2 parts by weight of the visible light responsive titanium oxide photocatalyst and 1 part by weight of hydrophobic zeolite having an average particle diameter of 5 μm were added to 77 parts by weight of water. A deodorant fiber fabric was obtained. The adhesion amount of the visible light responsive titanium oxide photocatalyst to the spunbonded nonwoven fabric was 3.0% by weight, and the adhesion amount of the hydrophobic zeolite was 1.5% by weight.

<Example 3>
Next, in Example 1, the deodorant fiber cloth was the same as Example 1 except that the visible light responsive titanium oxide photocatalyst having a particle size of 150 nm was changed to an apatite-coated visible light responsive titanium oxide photocatalyst having a particle size of 2 μm. Got. The adhesion amount of the visible light responsive titanium oxide photocatalyst to the spunbonded nonwoven fabric was 1.5% by weight, and the adhesion amount of the hydrophobic zeolite was 1.5% by weight.

<Example 4>
Next, in Example 1, a deodorized fiber fabric was obtained in the same manner as in Example 1 except that 1 part by weight of cocoon pattern activated carbon having a particle diameter of 20 μm was used as the adsorbent. The adhesion amount of the visible light responsive titanium oxide photocatalyst to the spunbonded nonwoven fabric was 1.5% by weight, and the adhesion amount of the insulator pattern activated carbon was 1.5% by weight.

<Example 5>
Next, in Example 1, as a visible light responsive photocatalyst, 10 parts by weight of a visible light responsive zinc oxide photocatalyst having a particle diameter of 100 nm and 5 parts by weight of hydrophobic zeolite having an average particle diameter of 5 μm are added to 65 parts by weight of water. A deodorant fiber fabric was obtained in the same manner as in Example 1 except that the above was added. The adhesion amount of the visible light responsive zinc oxide photocatalyst to the spunbonded nonwoven fabric was 15% by weight, and the adhesion amount of the hydrophobic zeolite was 6.5% by weight.

<Example 6>
In Example 1, except that the urethane-based binder resin (solid content 50%) is a polyvinyl alcohol resin (light transmittance is 80 to 85% at a wavelength of 300 to 500 nm, solid content 50%), the same as in Example 1. A deodorant fiber fabric was obtained. The adhesion amount of the visible light responsive titanium oxide photocatalyst to the spunbonded nonwoven fabric was 1.5% by weight, and the adhesion amount of the hydrophobic zeolite was 1.5% by weight.

<Comparative Example 1>
In Example 1, urethane-based binder resin (light transmittance is 50 to 80% at a wavelength of 300 to 500 nm, solid content 50%) and acrylic silicon-based binder resin (light transmittance is 0 to 20% at a wavelength of 300 to 500 nm, A deodorized fiber fabric was obtained in the same manner as in Example 1 except that the solid content was 50%. The adhesion amount of the visible light responsive titanium oxide photocatalyst to the spunbonded nonwoven fabric was 1.5% by weight, and the adhesion amount of the hydrophobic zeolite was 1.5% by weight.

<Comparative example 2>
In Example 1, urethane-based binder resin (light transmittance of 50 to 80% at a wavelength of 300 to 500 nm, solid content of 50%) was changed to ethylene vinyl acetate binder resin (light transmittance of 10 to 58% at a wavelength of 300 to 500 nm). , Deodorized fiber fabric was obtained in the same manner as in Example 1 except that the solid content was changed to 50%. The adhesion amount of the visible light responsive titanium oxide photocatalyst was 1.5% by weight, and the adhesion amount of the hydrophobic zeolite was 1.5% by weight.

<Comparative Example 3>
A deodorized fiber fabric was obtained in the same manner as in Example 1 except that 1 part by weight of hydrophobic zeolite having an average particle size of 5 μm was changed to zero and 79 parts by weight of water. The adhesion amount of the visible light responsive titanium oxide photocatalyst was 1.5% by weight, and the adhesion amount of the hydrophobic zeolite was 0.

<Comparative example 4>
In Example 1, a deodorized fiber fabric was obtained in the same manner as in Example 1 except that the visible light responsive titanium oxide photocatalyst of 150 nm was zero and water was 79 parts by weight. The adhesion amount of the visible light responsive titanium oxide photocatalyst was 0, and the adhesion amount of the hydrophobic zeolite was 1.5% by weight.

<Comparative Example 5>
A deodorized fiber fabric was obtained in the same manner as in Example 1, except that the visible light responsive titanium oxide photocatalyst having an average particle size of 150 nm was changed to a particle size of 5 μm. The adhesion amount of the visible light responsive titanium oxide photocatalyst and the hydrophobic zeolite to the spunbonded nonwoven fabric was 1.5% by weight, respectively.

<Comparative Example 6>
In Example 1, a deodorized fiber fabric was obtained in the same manner as in Example 1 except that the hydrophobic zeolite having an average particle size of 5 μm was changed to an average particle size of 50 μm. The adhesion amount of the hydrophobic zeolite was 1.5% by weight, and the adhesion amount of the visible light responsive titanium oxide photocatalyst was 1.5% by weight.

  As can be seen from Table 1, the deodorant performance of the present invention and the texture of the fabric were satisfactory, but the comparison was not using a binder resin having a light transmittance of 50% or more at a wavelength of 300 to 500 nm. In Examples 1 and 2, the ability of the photocatalyst could not be fully exhibited. In Comparative Examples 3 and 4 that do not carry a photocatalyst or an adsorbent, the deodorizing performance was not satisfied. Further, Comparative Examples 5 and 6 having large particle diameters of the photocatalyst and the adsorbent were not satisfactory because the texture was hard.

  The technique of the present invention combines a photocatalyst with strong oxidizing power with fibers and finally decomposes malodor and VOC into carbon dioxide gas and water while preventing secondary contamination with an adsorbent. It is widely used for clothing, interior goods such as curtains, carpets, and wallpaper, seats for vehicles, and ceiling materials.

It is a figure which shows the light transmittance in each wavelength of binder resin.

Claims (5)

  A fiber fabric in which a photocatalyst and an adsorbent are fixed by a binder resin, wherein the binder resin has a light transmittance of 50% or more at a wavelength of 300 to 500 nm, and has a deodorizing and VOC removing function Fiber fabric.   2. The deodorizing and VOC removing function according to claim 1, wherein an apparent average particle size in the liquid of the photocatalyst is 80 nm to 3 μm, and an average particle size of the adsorbent is 20 nm to 30 μm. Fiber fabric.   The fiber fabric having a deodorizing and VOC removing function according to claim 1 or 2, wherein the binder resin is a urethane resin or a polyvinyl alcohol resin.   The fiber fabric having a deodorizing and VOC removing function according to any one of claims 1 to 3, wherein the photocatalyst is a visible light responsive photocatalyst coated with apatite, and the adsorbent is a hydrophobic zeolite. .   The amount of the photocatalyst attached to the fiber fabric is 0.5 to 25% by weight with respect to 100 parts by weight of the fiber fabric, and the amount of the adsorbent attached to the fiber fabric is 0.1 with respect to 100 parts by weight of the fiber fabric. The fiber fabric having a deodorizing and VOC removing function according to any one of claims 1 to 4, wherein the fiber fabric has a deodorizing function and a VOC removing function.

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