JP5260192B2 - Textile structures and textile products - Google Patents

Description

  The present invention relates to a fiber structure including filament yarns having a single fiber diameter of 1000 nm or less and having excellent deodorizing performance, and a fiber product using the fiber structure.

  In recent years, with the diversification of living environments aimed at comfortable living, fibers having various functions such as deodorizing properties and fiber structures using the same have been proposed. For example, functional fibers obtained by melt spinning fiber-forming thermoplastic polymer compounds containing deodorant fine particles (see, for example, Patent Document 1) or deodorant fine particles via post-processing through a binder resin A deodorant fiber structure obtained by applying to a fiber structure has been proposed (see, for example, Patent Document 2).

However, these deodorant fiber structures have not been sufficient in terms of deodorization.
On the other hand, in recent years, a fiber structure using ultrafine fibers called nanofibers has been proposed (see, for example, Patent Document 3).

JP-A-5-222614 JP 2004-270042 A JP 2007-291567 A

  The present invention has been made in view of the above-described background, and an object of the present invention is to use a fiber structure including a filament yarn A having a single fiber diameter of 1000 nm or less and having excellent deodorizing performance, and the fiber structure. To provide a textile product.

  As a result of intensive studies in order to achieve the above-mentioned problems, the present inventor has found that the fiber structure including the filament yarn A having a single fiber diameter of 1000 nm or less has a certain degree of deodorizing property. It has been found that it has a particularly excellent deodorizing property by including it, and the present invention has been completed by further intensive studies.

Thus, according to the present invention, “a long fiber having a filament structure including filament yarn A having a single fiber diameter of 1000 nm or less, wherein the filament yarn A includes photocatalytic fine particles made of photocatalytic titanium oxide , and having 500 or more filaments. And a fiber structure characterized in that the fiber structure is jetted with high-pressure water .

At that time, it is preferable that the filament yarn A exists in a separated state without cohesion and adhesion. Moreover, it is preferable that the filament yarn A is a yarn obtained by dissolving and removing a sea component of a sea-island type composite fiber composed of a sea component and an island component. The filament yarn A is preferably formed of polyester in which photocatalyst fine particles are kneaded in the polyester in an amount of 0.5% by weight or more based on the weight of the polyester . Moreover , it is preferable that the average secondary particle diameter of the said photocatalyst fine particle exists in the range of 0.8-1.2 micrometers.

  In the fiber structure of the present invention, the filament yarn A is preferably contained in an amount of 30% by weight or more based on the total weight of the fiber structure. The fiber structure preferably has a woven or knitted structure.

  Further, according to the present invention, an outer garment, a sports garment, an inner garment, a shoe material, a medical / hygiene product of a diaper or a care sheet, a bedding, a chair, Any textile product selected from the group consisting of sofa skins, curtains, carpets, car seats, interior goods, and filter products for air purifiers and water purifiers is provided.

  According to the present invention, a fiber structure including filament yarn A having a single fiber diameter of 1000 nm or less and having excellent deodorizing performance and a fiber product using the fiber structure are obtained.

Hereinafter, embodiments of the present invention will be described in detail.
First, in the filament yarn A (hereinafter sometimes referred to as “nanofiber”), the single fiber diameter (single fiber diameter) is 1000 nm or less (preferably 10 to 1000 nm, more preferably 100 to 900 nm, particularly preferably. Is in the range of 550 to 900 nm). When this single fiber diameter is converted into a single fiber fineness, it corresponds to 0.01 dtex or less. When the single fiber diameter is larger than 1000 nm, a fiber structure having excellent deodorizing properties, which is the main object of the present invention, may not be obtained, which is not preferable. Here, when the cross-sectional shape of the single fiber is an atypical cross section other than the round cross section, the diameter of the circumscribed circle is defined as the single fiber diameter. The single fiber diameter can be measured by photographing the cross section of the fiber with a transmission electron microscope. Moreover, it is preferable that the dispersion | variation in single fiber fineness exists in the range of -20%-+ 20%.

  In the filament yarn A, the number of filaments is not particularly limited, but is preferably 500 or more (more preferably 2000 to 10,000) in order to obtain excellent deodorizing properties. The total fineness of the filament yarn A (the product of the single fiber fineness and the number of filaments) is preferably in the range of 5 to 150 dtex.

  The fiber form of the filament yarn A is not particularly limited, but is preferably a long fiber (multifilament yarn). The cross-sectional shape of the single fiber is not particularly limited, and may be a known cross-sectional shape such as a circle, a triangle, a flat shape, or a hollow shape. In addition, normal air processing and false twist crimping may be applied.

  The type of polymer that forms the filament yarn A is not particularly limited, but a polyester polymer is preferable. For example, polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polylactic acid, stereocomplex polylactic acid, polyester obtained by copolymerizing the third component, and the like are preferably exemplified. Such polyester may be material recycled or chemically recycled polyester. Furthermore, the polyester obtained using the catalyst containing the specific phosphorus compound and titanium compound which are described in Unexamined-Japanese-Patent No. 2004-270097 and 2004-21268 may be sufficient. In the polymer, a fine pore forming agent, a cationic dye dyeing agent, an anti-coloring agent, a heat stabilizer, a fluorescent whitening agent, a matting agent, a coloring agent may be added as necessary within the range not impairing the object of the present invention. 1 type (s) or 2 or more types of an agent, a hygroscopic agent, and inorganic fine particles may be contained.

  The fiber structure of the present invention is a fiber structure containing the filament yarn A, and the filament yarn A contains photocatalyst fine particles. Here, the photocatalyst fine particles may be attached to the surface of the filament yarn A, but if the photocatalyst fine particles are kneaded in the polymer forming the filament yarn A, the deodorizing durability is improved. preferable. In particular, the filament yarn A is formed of a polyester in which photocatalyst fine particles are kneaded in the polyester as described above in an amount of 0.5% by weight or more (preferably 0.5 to 2.0% by weight) relative to the weight of the polyester. It is preferable.

  As the photocatalyst fine particles, photocatalytic titanium oxide is preferably exemplified. The photocatalytic titanium oxide may be any one of anatase type, rutile type, and amorphous type, and anatase type titanium oxide is particularly preferred because of its high photocatalytic activity.

  The average secondary particle diameter of the photocatalyst fine particles is preferably in the range of 0.8 to 1.2 μm.

  As described in JP-A-2004-270042, the photocatalyst fine particles may be adhered to the fiber surface by a binder resin. However, in terms of deodorant durability, the photocatalyst fine particles may be attached to the fiber surface as described above. It is preferably kneaded in the polymer to be formed.

  Moreover, in the fiber structure of the present invention, it is preferable that the filament yarns A are present in a separated state without agglomeration and adhesion. Here, the “separated state” in the present invention means that the filament yarns A are independent from each other as shown in FIGS. 1 and 2 of JP-A-2007-291567. When the filament yarn A exists in such a dispersed state, the fiber structure can sufficiently exhibit the deodorizing performance. On the other hand, in the case of a fiber structure in which nanofibers are aggregated and adhered as shown in FIGS. 3 and 4 of Japanese Patent Application Laid-Open No. 2007-291567, there is a possibility that the deodorizing performance cannot be sufficiently exhibited. In the present invention, the “disjoint state” means that there is no single yarn lump in which 100 or more nanofibers are closely aggregated and aggregated, and the nanofibers do not need to be completely independent, but less than 100. There may be a single yarn mass in which the nanofibers are agglomerated and adhered.

  In the fiber structure of the present invention, the filament yarn A is preferably contained in an amount of 30% by weight or more (more preferably 50% by weight or more, further preferably 70% by weight or more, particularly preferably 100% by weight). When the content of the filament yarn A is less than 30% by weight, there is a possibility that sufficient deodorizing properties may not be expressed.

  In the fiber structure of the present invention, the form of the fiber structure is not particularly limited, and examples thereof include woven and knitted fabric, felt, yarn, and nonwoven fabric. Of these, woven or knitted fabric is preferred.

In the case of a knitted fabric, it is preferable that D ^1/2 × Co × We is 10,000 or more (more preferably 20000 to 100,000) because excellent deodorizing properties are easily obtained. However, D is the total fineness (dtex) of the multifilament yarn, Co is the number of courses per 2.54 cm, and We is the number of wales per 2.54 cm.

On the other hand, in the case of a woven fabric, it is preferable that the cover factor CF calculated by the following formula is 1500 or more (more preferably 1700 to 3800) because excellent deodorizing properties are easily obtained.
CF = (DWp / 1.1) ^1/2 × MWp + (DWf / 1.1) ^1/2 × MWf
However, DWp is the total warp fineness (dtex), MWp is the warp weave density (main / 2.54 cm), DWf is the total weft fineness (dtex), and MWf is the weft weave density (main / 2.54 cm).

  When the fiber structure is a woven or knitted fabric, the nanofibers are arranged in the woven or knitted fabric as multifilament yarns. At that time, the number of nanofibers of the multifilament yarn is preferably 500 or more (more preferably 2000 to 10000).

Further, when the fiber structure is a woven fabric or a knitted fabric, the basis weight is preferably 20 g / m ² or more (preferably 20 to ²⁰⁰ g / m ² ). If the basis weight is less than 20 g / m ² , satisfactory deodorizing properties may not be obtained.

  In the fiber structure of the present invention, when other yarns other than the filament yarn A are included, the fiber type of the other yarns is not limited, but polyester fiber yarns are preferable from the viewpoint of recyclability.

  The fiber structure of the present invention can be produced, for example, by the following production method. That is, after obtaining a fiber structure using a sea-island composite fiber composed of a sea component and an island component and having an island component diameter of 1000 nm or less, the sea component is dissolved and removed, and high-pressure water is used as necessary. It is preferable to spray the fiber structure.

Here, immediately after the sea component is dissolved and removed, the island components (nanofibers) are coherently adhered to each other, but a plurality of coherently adhered nanofibers are present in a dispersed state by the above-described injection treatment. At that time, the pressure of the high-pressure water is preferably in the range of 3 to 10 MPa (30 to 100 kgf / cm ² ), and the device is a spunlace water needle device (injection hole diameter is preferably 0.2 mm or less) or super. Sonic water is preferred.

  Further, as the sea-island type composite fibers, the following are suitable. That is, the combination of the polymers is arbitrary as long as the sea component polymer is a combination having higher solubility than the island component polymer, but the dissolution rate ratio (sea / island) is preferably 200 or more. When the dissolution rate ratio is less than 200, part of the island component of the fiber cross-section surface layer portion is dissolved while the sea component of the fiber cross-section central portion is dissolved, so the sea component is completely dissolved and removed. For this reason, the island component is reduced by a percentage, and strength deterioration due to the thickness variation of the island component and solvent erosion occurs, and problems such as fluff and pilling are likely to occur.

  The sea component polymer may be any polymer as long as the dissolution rate ratio with respect to the island component is 200 or more, but polyesters, polyamides, polystyrenes, polyethylenes, and the like having good fiber forming properties are particularly preferable. For example, as an easily soluble polymer in an alkaline aqueous solution, polylactic acid, an ultra-high molecular weight polyalkylene oxide condensation polymer, a polyethylene glycol compound copolymer polyester, a copolymer polyester of polyethylene glycol compound and 5-sodium sulfonic acid isophthalic acid may be used. Is preferred. Nylon 6 is soluble in formic acid, and polystyrene and polyethylene are very well soluble in organic solvents such as toluene. Among them, in order to achieve both easy alkali solubility and sea-island cross-section formability, the polyester-based polymer is 3 to 10% by weight of polyethylene glycol having 6 to 12 mol% of 5-sodium sulfoisophthalic acid and a molecular weight of 4000 to 12000. % Copolymerized polyethylene terephthalate copolymer polyester having an intrinsic viscosity of 0.4 to 0.6 is preferred. Here, 5-sodium isophthalic acid contributes to improving hydrophilicity and melt viscosity, and polyethylene glycol (PEG) improves hydrophilicity. PEG has a higher hydrophilicity effect, which is thought to be due to its higher order structure, as the molecular weight increases, but it is preferable from the viewpoints of heat resistance and spinning stability because the reactivity becomes poor and a blend system is formed. Disappear. Further, when the copolymerization amount is 10% by weight or more, it is not preferable because it originally has an effect of decreasing the melt viscosity, and it is preferable to copolymerize both components within the above range.

  On the other hand, the island component polymer may be any polymer as long as it has a difference in dissolution rate from the sea component, but as described above, fiber-forming polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polylactic acid, Polyester such as polyester copolymerized with three components is preferred. In the polymer, a fine pore forming agent, a cationic dye dyeing agent, an anti-coloring agent, a heat stabilizer, a fluorescent whitening agent, a matting agent, a coloring agent may be added as necessary within the range not impairing the object of the present invention. 1 type (s) or 2 or more types of an agent, a hygroscopic agent, and inorganic fine particles may be contained. In particular, as described above, the polyester is preferably a polyester in which photocatalyst fine particles are kneaded in an amount of 0.5% by weight or more based on the weight of the polyester.

  The sea-island composite fiber composed of the sea component polymer and the island component polymer preferably has a sea component melt viscosity higher than that of the island component polymer during melt spinning. In such a relationship, even if the composite weight ratio of the sea component is less than 40%, the islands are joined together, or the majority of the island components are joined to be different from the sea-island type composite fiber. hard.

  A preferred melt viscosity ratio (sea / island) is in the range of 1.1 to 2.0, especially 1.3 to 1.5. If this ratio is less than 1.1 times, the island components are likely to be joined during melt spinning, whereas if it exceeds 2.0 times, the viscosity difference is too large and the spinning tone tends to be lowered.

  Next, the greater the number of islands, the higher the productivity when producing ultrafine fibers by dissolving and removing sea components, and the fineness of the resulting nanofibers becomes remarkable, and the softness and smoothness that is unique to nanofibers. It is preferable that it is 100 or more (more preferably 300 to 1000) in that it can be expressed. Here, when the number of islands is less than 100, there is a possibility that even if the sea component is dissolved and removed, a high multifilament yarn composed of a single yarn having a very fineness cannot be obtained and the object of the present invention cannot be achieved. is there. If the number of islands is too large, not only the production cost of the spinneret increases, but also the processing accuracy itself tends to decrease.

  Next, the diameter of the island component needs to be 1000 nm or less (preferably 10 to 1000 nm). Further, each island in the cross section of the sea-island composite fiber is more preferable as the diameter is uniform because the quality and durability of the knitted fabric obtained by removing the sea components are improved.

  In the sea-island composite fiber, the sea-island composite weight ratio (sea: island) is preferably in the range of 40:60 to 5:95, and particularly preferably in the range of 30:70 to 10:90. Within such a range, the thickness of the sea component between the islands can be reduced, the sea component can be easily dissolved and removed, and the conversion of the island component into ultrafine fibers is facilitated. Here, when the proportion of the sea component exceeds 40%, the thickness of the sea component becomes too thick. On the other hand, when the proportion is less than 5%, the amount of the sea component becomes too small, and joining between the islands easily occurs.

  In the above-mentioned sea-island type composite fiber, the thickness of the sea component between the islands is suitably 500 nm or less, particularly in the range of 20 to 200 nm. When the thickness exceeds 500 nm, the thick sea component is dissolved and removed. As the dissolution of the components progresses, not only the homogeneity between the island components decreases, but defects and dyeing spots such as fuzz and pilling are likely to occur.

  The sea-island type composite fiber can be easily produced, for example, by the following method. That is, first, a polymer having a high melt viscosity and an easily soluble polymer and a polymer having a low melt viscosity and a hardly soluble polymer are melt-spun so that the former is a sea component and the latter is an island component. Here, the relationship between the melt viscosity of the sea component and the island component is important.If the ratio of the sea component decreases and the thickness between the islands decreases, if the melt viscosity of the sea component is small, some of the flow paths between the islands This is not preferable because sea components flow at high speed and joining between islands easily occurs.

  As the spinneret used for melt spinning, any one such as a hollow pin group for forming an island component or a group having a fine hole group can be used. For example, any spinneret that forms a cross section of the sea island by joining the island component extruded from the hollow pin or the fine hole and the sea component flow designed to fill the gap between the sea component flow may be used. .

  The discharged sea-island type cross-section composite fiber is solidified by cooling air, and is preferably wound after being melt-spun at 400 to 6000 m / min. The obtained undrawn yarn is made into a composite fiber having desired strength, elongation, and heat shrinkage properties through a separate drawing process, or is taken up by a roller at a constant speed without being wound once, and subsequently drawn. Any of the methods of winding after passing through may be used.

  Here, in order to produce a sea-island type composite fiber having a particularly fine island diameter with high efficiency, the fiber structure is not changed prior to neck stretching (orientation crystallization stretching) with ordinary so-called orientation crystallization. It is preferable to employ a fluid stretching process in which only the diameter is extremely reduced. In order to facilitate fluid drawing, it is preferable to preheat the fiber uniformly using an aqueous medium having a large heat capacity and draw at a low speed. By doing so, it becomes easy to form a fluid state at the time of stretching, and it can be easily stretched without development of the fine structure of the fiber. In this process, both the sea component and the island component are preferably polymers having a glass transition temperature of 100 ° C. or less, and particularly suitable for polyesters such as polyethylene terephthalate, polybutylene terephthalate, polylactic acid, and polytrimethylene terephthalate. Specifically, it is immersed in a hot water bath in the range of 60 to 100 ° C., preferably 60 to 80 ° C., and uniformly heated, the draw ratio is 10 to 30 times, the supply speed is 1 to 10 m / min, and the winding speed is It is preferable to carry out in the range of 300 m / min or less, particularly 10 to 300 m / min. If the preheating temperature is insufficient and the stretching speed is too high, the desired high-magnification stretching cannot be achieved.

  The drawn yarn drawn in the fluidized state is oriented, crystallized and drawn at a temperature of 60 to 220 ° C. in accordance with a conventional method in order to improve mechanical properties such as the strength and elongation. If the drawing conditions are outside this range, the properties of the resulting fiber will be insufficient. The draw ratio varies depending on the melt spinning conditions, flow stretching conditions, orientation crystallization stretching conditions, etc., but is 0.6 to 0.95 times the maximum draw ratio that can be stretched under the orientation crystallization stretching conditions. What is necessary is just to extend | stretch.

  After the sea-island type composite fiber described above is untwisted or twisted as necessary, a fiber structure such as a woven or knitted fabric is obtained together with other yarns as necessary, and then the sea component is mixed with an alkaline aqueous solution. And the nanofibers can be separated from each other by spraying the fiber structure with high-pressure water as described above.

  In addition, you may give a dyeing process before and / or after the melt | dissolution removal process of the sea component by the said alkaline aqueous solution. In addition, conventional processing such as hydrophilic processing, brushed processing, ultraviolet shielding or antistatic agent, and various processing that provides functions such as antibacterial agent, deodorant agent, insect repellent agent, phosphorescent agent, retroreflective agent, negative ion generator, etc. May be additionally applied.

  In the fiber structure thus obtained, the filament yarn A containing the photocatalyst fine particles has an extremely small single fiber diameter of 1000 nm or less, so that the surface area of the fiber is increased and excellent deodorizing performance is exhibited. In particular, when the filament yarns A are present in a separated state without cohering and adhering to each other, particularly excellent deodorizing performance is exhibited.

The fiber structure of the present invention includes an outer garment, a sports garment, an inner garment, a shoe material, a medical / hygiene product of a diaper or a care sheet, a bedding, a chair, and a sofa. It is any textile product selected from the group consisting of skin materials, curtains, carpets, car seats, interior goods, and filter products for air purifiers and water purifiers.
Since such a fiber product contains the fiber structure, it exhibits excellent deodorizing performance.

  Next, although the Example and comparative example of this invention are explained in full detail, this invention is not limited by these. In addition, each measurement item in an Example was measured with the following method.

<Melting viscosity> The polymer after drying is set in the orifice set to the ruder melting temperature at the time of spinning, melted and held for 5 minutes, extruded with several levels of load, and the shear rate and melt viscosity at that time are plotted. To do. By gently connecting the plots, a shear rate-melt viscosity curve is created, and the melt viscosity when the shear rate is 1000 sec- ¹ is observed.

<Dissolution rate> The yarn is wound up at a spinning speed of 1000 to 2000 m / min with a 0.3φ-0.6L × 24H base of each of the sea and island components, and the residual elongation is in the range of 30 to 60%. To produce a 84 dtex / 24 fil multifilament. The weight loss rate was calculated from the dissolution time and the dissolution amount at a bath ratio of 100 at a temperature at which the solvent was dissolved in each solvent.

<Dispersed state of nanofibers> After the fiber structure was immersed in liquid nitrogen and solidified and then cut, 10 sections of the cross section (length 61 μm × width 80 μm, area 4880 μm ² ) were photographed with an electron microscope (magnification 1500 times) ), The total number of nanofiber masses in which 100 or more nanofibers were aggregated and adhered was counted. When the total number is 0, it is acceptable, and when it is 1 or more, it is unacceptable.

<Mass weight> It was measured according to JIS L1096 6.4.2.

<Deodorization performance> Using the method described in the manual for deodorization / equipment analysis test established by the Japan Textile Evaluation Technology Council, while standing, irradiate the UV lamp with UV intensity of 0.12 W / m ^{2 to} improve the deodorization performance. It was measured.

[Example 1]
Polyethylene terephthalate (containing 1.0% by weight of anatase-type photocatalytic titanium oxide particles having a melt viscosity of 1200 poise at 280 ° C. and an average secondary particle diameter of 0.8 μm) as an island component, and 5-sodium sulfoisophthalic acid as a sea component Using polyethylene terephthalate (melt viscosity at 280 ° C., 1750 poise) copolymerized with 6 mol% and 6% by weight of polyethylene glycol having a number average molecular weight of 4000 (dissolution rate ratio (sea / island) = 230), sea: island = 30 The sea-island type composite unstretched fiber having 70 and the number of islands = 836 was melt-spun at a spinning temperature of 280 ° C. and a spinning speed of 1500 m / min and wound up once.

  The obtained undrawn yarn was roller-drawn at a drawing temperature of 80 ° C. and a draw ratio of 2.5 times, and then heat-set at 150 ° C. and wound up. The obtained sea-island type composite drawn yarn (for filament yarn A) was 55 dtex / 10 fil, and the cross section of the fiber was observed with a transmission electron microscope TEM. The shape of the island was round and the diameter of the island was 700 nm. It was.

  Next, a normal ordinary polyethylene terephthalate multifilament (35 dtex 72 filament) was warped without twisting for warp, while the above-mentioned sea-island type composite drawn yarn was prepared for weft. Then, using a normal lapier loom, a plain fabric was woven at 190 / 2.54 cm in both weft density and weft to obtain a fabric.

  And only the sea component of the said sea-island type composite fiber was melt | dissolved in this textile fabric with the 2.5% sodium hydroxide aqueous solution of temperature 55 degreeC. Thereafter, normal relaxation was performed at a temperature of 120 ° C. and a keep time of 20 minutes, and normal dyeing was performed at a temperature of 130 ° C. and a keep time of 45 minutes. Furthermore, a dry heat final set was applied at a temperature of 180 ° C. for 1 minute.

Next, a water pressure of 60 kg / cm ² and a knitted fabric feed rate are applied to the woven fabric with a water needle device for spunlace (injection hole diameter: 0.1 mm, hole pitch: 1.0 mm, hole arrangement: two rows in a staggered manner). High-pressure water was sprayed under the conditions of 2 m / min, knitted fabric support mesh: 50 mesh.

The obtained fabric had a basis weight of 50 g / m ² and contained 1.0% by weight of photocatalytic titanium oxide and 50% by weight of filament yarn having a single fiber diameter of 700 nm. Further, 50% by weight of polyethylene terephthalate multifilament having a single fiber diameter of 9.1 μm was contained. In the woven fabric, the nanofibers existed in a dispersed state without agglomeration and adhesion, and the number of nanofiber masses was zero.

Using this fabric, a deodorization performance test for each odor component was conducted. As a result, in an evaluation time of 2 hours, ammonia 95%, acetic acid 97%, acetaldehyde 91%, isovaleric acid 100%, and nonenal 100%. Odor rate was shown.
Next, when the outer garment was obtained and worn using the woven fabric, it had excellent deodorizing performance.

[Comparative Example 1]
In Example 1, a woven fabric was obtained in the same manner as in Example 1 except that polyethylene terephthalate containing no photocatalyst particles was used as the island component of the sea-island composite fiber.
In the obtained woven fabric, the basis weight was 49 g / m ² . Using the woven fabric, a deodorization performance test for each odor component was conducted, and in an evaluation time of 2 hours, ammonia 28%, acetic acid 93%, acetaldehyde 0%, isovaleric acid 98% and nonenal 84%. The results showed a low effect on odor.

[Comparative Example 2]
A polyethylene terephthalate multifilament (35 dtex 72 filament, single fiber diameter 6.7 μm) containing 1.0 wt% of anatase-type photocatalytic titanium oxide particles having an average secondary particle diameter of 0.8 μm was used without twisting. Were obtained in the same manner as in Example 1 to obtain a woven fabric.
In the obtained woven fabric, the basis weight was 49 g / m ² . When the deodorizing performance test for each odor component was performed using the woven fabric, the effect was lower than that of Example 1 with 55% acetic acid, 70% isovaleric acid, 60% nonenal in an evaluation time of 2 hours. It was a thing.

[Comparative Example 3]
A woven fabric was obtained in the same manner as in Example 1 except that ordinary polyethylene terephthalate multifilament (35 dtex 72 filament, single fiber diameter: 6.7 μm) was used as the weft without twisting.
In the obtained woven fabric, the basis weight was 49 g / m ² . When the deodorizing performance test for each odor component was performed using the woven fabric, it was extremely effective for some odors with 25% acetic acid, 7% isovaleric acid and 3% nonenal in an evaluation time of 2 hours. Showed low results.

  According to the present invention, a fiber structure including filament yarn A having a single fiber diameter of 1000 nm or less and having excellent deodorizing performance and a fiber product using the fiber structure are provided, and the industrial value thereof is It is extremely large.

Claims (8)

A fiber structure including a filament yarn A having a single fiber diameter of 1000 nm or less, wherein the filament yarn A is a long fiber including photocatalyst fine particles made of photocatalytic titanium oxide and having a filament number of 500 or more , and the fiber structure is A fiber structure characterized by being jetted with high-pressure water .   The fiber structure according to claim 1, wherein the filament yarn A exists in a dispersed state without cohesion and adhesion.   The fiber structure according to claim 1 or 2, wherein the filament yarn A is a yarn obtained by dissolving and removing a sea component of a sea-island composite fiber composed of a sea component and an island component.   The fiber structure according to any one of claims 1 to 3, wherein the filament yarn A is formed of polyester in which photocatalyst fine particles are kneaded in polyester in an amount of 0.5 wt% or more relative to the weight of the polyester. The fiber structure in any one of Claims 1-4 whose average secondary particle diameter of the said photocatalyst microparticles | fine-particles exists in the range of 0.8-1.2 micrometers. The fiber structure according to any one of claims 1 to 5, wherein the filament yarn A is contained in an amount of 30% by weight or more based on the total weight of the fiber structure. The fiber structure according to any one of claims 1 to 6, wherein the fiber structure has a woven structure or a knitted structure. Outer garments, sports garments, inner garments, shoe materials, medical / hygiene products for diapers and nursing sheets, bedding, chairs, comprising the fiber structure according to claim 1. One of the textile products selected from the group consisting of skin products for sofas, sofas, curtains, carpets, car seats, interior goods, and filter products for air purifiers and water purifiers.