JP3301706B2 - Deodorant composite fiber and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to easily splittable conjugate fibers having excellent deodorizing performance which can be used in applications that dislike bad odors, such as carpets, curtains, hospital sheets, diapers, wiping cloths, and materials for clothing. And its manufacturing method. More specifically, wiping cloths and soft cloths for various products such as carpets, curtains, hospital sheets, eyeglass lenses, cameras and other optical devices, mirrors and window glasses, metal products, luxury furniture, lacquerware, tableware, camera products, etc. Non-conventionally easy-to-separate conjugate fiber with very good separability and excellent deodorizing performance, suitable for synthetic paper and materials for clothing with a fine fine texture It is provided with good performance and a reasonable process at low cost.

[0002]

2. Description of the Related Art Among synthetic fibers, polyester fibers, polyamide fibers and the like are indispensable not only as clothing materials but also as living materials in terms of excellent dimensional stability, chemical resistance, strength, durability and the like. I have. However, depending on the application, it has been desired to further provide a special function. For example, there is a growing interest in various odors in living environments such as homes, offices, and hospitals, and in applications that dislike odors, such as carpets, curtains, hospital sheets, and diapers, odors (nitrogen-containing ammonia, amines, etc.) Compound,
Hydrogen sulfide, sulfur-containing compounds such as methyl mercaptan, aldehydes such as formaldehyde and acetaldehyde,
Fibers (including lower fatty acids such as formic acid, acetic acid, propionic acid, and valeric acid), and fibers and fiber products that retain the ability to reduce the amount.

However, in the living environment, there are various odor components such as basic odor components such as the nitrogen-containing compounds, neutral odor components such as sulfur-containing compounds and aldehydes, and acidic odor components such as lower fatty acids. However, it has been difficult to effectively remove a plurality of different components. Various deodorant fibers have been proposed to remove these odor components.
For example, there is a method of attaching an extract from natural softwood, an extract from hardwood or an extract from green tea to the surface of a fiber product by post-processing, but there is a problem in durability because the function is imparted by post-processing. . In particular, there has been a problem that the deodorizing performance is extremely lowered, for example, when washing is repeatedly performed or when a textile is dyed.

[0004] Deodorant fibers having an adsorbent carried on the fibers have also been proposed. However, with such deodorant fibers,
Since the adsorption capacity of the adsorbent is limited, the odor cannot be deodorized when the adsorption amount of the odor component reaches the saturated adsorption amount. JP 62
Japanese Patent Application Laid-Open No. 6985/1987 and Japanese Patent Application Laid-Open No. 62-6986 disclose catalytically decomposing malodorous components using deodorant fibers supporting metal phthalocyanine. However, since the catalytic activity of metal phthalocyanine is small, the deodorizing effect is not sufficient.

[0005] Further, in order to improve the deodorant durability,
As a deodorant kneaded into the resin, there is a compound obtained by combining an iron divalent ion compound and L-ascorbic acid. However, heat resistance is insufficient, and discoloration occurs after deodorizing a malodorous component. There is a problem that it can be used only for specific applications as a fiber material.

JP-A-63-29571 proposes a deodorant fiber in which zirconium phosphate particles are kneaded into fibers as a deodorant component, and JP-A-2-91209 discloses zinc oxide and silicon dioxide. A deodorant fiber obtained by kneading zinc silicate particles having an amorphous structure formed by the above method into a fiber has been proposed, and JP-A-2-80611 discloses Ti and Zn.
A deodorant fiber prepared by kneading a hydrated oxide-based white fine powder into the fiber has been proposed. Furthermore, Tokuhyo Hei 5-504091
JP-A-6-47276 and JP-A-6-47276 propose a deodorant fiber in which an absorbent composition containing a water-insoluble phosphate of a tetravalent metal and a hydroxide of a divalent metal is compounded or blended in a fiber. Have been. However, these deodorizing fibers do not exhibit excellent deodorizing performance against all odor components including an acidic odor component, a basic odor component, and a neutral odor component.

[0007] Even if it has a certain degree of deodorizing performance, if the area of contact with air containing odorous components is small, it is not possible to completely deodorize odorous components. Odor (odor) remains, and discomfort cannot be wiped out. On the other hand, many cleaning cloths and papers are made of fibers derived from natural products such as cellulose. Natural products such as cellulose have considerable cleaning power, but are inferior in strength and durability. For example, there is often a problem that fiber fragments drop off from the fabric during cleaning, and conversely, dust is generated. On the other hand, synthetic fibers are excellent in strength and durability, but are inferior in cleaning power. In recent years, with the advance of synthetic fiber fibrillation technology, fabrics composed of fibrillated fibers have come to be used. As one of the techniques, there is a splittable conjugate fiber composed of polyester and polyamide. However, since the releasability of polyester and polyamide in the fabric is not sufficient, the desired fibrillation is insufficient, or a post-processing step is performed. In order to sufficiently promote the fibrillation, a method of treating one component with an agent that swells has been adopted. When the chemical treatment is carried out, the chemical tends to remain in the fabric upon implementation, and when dyeing, spots occur and the fastness deteriorates. A great deal of cost is required for the drainage of the chemical. There has been a problem that the fabric is excessively shrunk due to the chemical treatment, which is not preferable as a product. In addition, the splittable conjugate fiber composed of polyester and polyamide is a spinning and drawing process in which FOY-like spinning processability and drawing processability are separate processes, fuzz and yarn breakage are likely to occur, yield is poor, and DSY or SDY Even in the one-step spinning which is a streamlining process, there is a problem that fluff and breakage are apt to occur similarly and the cost becomes high.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to convert a thermoplastic polyamide containing a deodorant and a thermoplastic polyester containing inorganic fine particles. The present invention provides a splittable conjugate fiber which has a specific surface area increased by splitting, has a remarkably excellent deodorizing performance, maintains a split fibril performance suitable for fabric production, and has It can be produced with good fiberization process stability without producing yarns and fluff, and is provided by a rational process. Another object of the present invention is to provide a deodorant fiber having excellent antibacterial performance.

[0009]

That is, the present invention comprises a polyamide component containing a deodorant and a polyester component containing inorganic fine particles, wherein one component is not completely surrounded by the other component. This is a splittable conjugate fiber having a cross section in which both components are joined, and the primary average particle diameter (μm) of the inorganic fine particles contained in the polyester component and the content (% by weight) of the inorganic fine particles are represented by the following formula (1). ) To (3); 0.01 ≦ primary average particle size (μm) ≦ 5.0 (1) 0.05 ≦ inorganic fine particle content (% by weight) ≦ 10.0 (2) 0.01 ≦ X ≦ 3.0 (3) where X = primary average particle The diameter (μm) × the content of inorganic fine particles (% by weight) is satisfied, and the reduced viscosity (η _sp / C) of the polyester is 0.65 to
1.0, and the reduced viscosity (η _sp / C) of the polyamide is 1.6 ~
2.2 is a deodorant splittable conjugate fiber, and the above-mentioned conjugate fiber is collected with good processability without fluff and thread breakage, and as a method for cost-effectively producing, the present invention uses inorganic fine particles. A polyester having a reduced viscosity (η _{sp /} C) of 0.65 to 1.0, wherein the inorganic fine particles have a primary average particle diameter (μ
m) and the polyester component in which the content (% by weight) of the inorganic fine particles in the polyester satisfies the above formulas (1) to (3), and the reduced viscosity (η _sp / C) containing the inorganic deodorant is 1.6.
After melt-spinning a polyamide component of ~ 2.2 from a spinneret in a composite form in which both components are joined without completely surrounding one component with the other component, the spun product is once subjected to a glass transition temperature. Cooled below, and then run through a heating zone heated to an ambient temperature of 100 ° C. or higher,
A method for producing a deodorant splittable conjugate fiber, characterized in that the fiber is taken off at a speed of at least one minute. Furthermore, the present invention is a fiber aggregate of a deodorant-containing polyamide ultrafine fiber and an inorganic fine particle-containing polyester ultrafine fiber obtained by subjecting the splittable conjugate fiber to a chemical and / or physical splitting treatment. .

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The conjugate fiber of the present invention is, for example, a polyamide containing a phosphate of a tetravalent metal, a hydroxide of a divalent metal and a photocatalyst as a deodorant. It is composed of a polyester having no affinity with polyamide. As the deodorant, known various deodorants can be used alone or in combination of two or more. In the present invention, the acidic odor component, the basic odor component, and the neutral odor component are used for all odor components. It is preferable to use a deodorant exhibiting excellent deodorizing performance, and examples of the deodorant having such performance include a dehydrating agent comprising a phosphate of a tetravalent metal, a hydroxide of a divalent metal and a photocatalyst. Odorants are preferred. In the present invention, the photocatalyst includes an optical semiconductor, for example, an oxide semiconductor such as titanium oxide. Phosphate of a tetravalent metal used in combination with a photocatalyst, hydroxide of a divalent metal has a function as an adsorbent, but in the present invention, silicate oxide or the like which also functions as an adsorbent is used. It may contain an inorganic adsorbent. The content of the photocatalyst is 0.1 to 25% by weight based on the whole fiber, and the content of the phosphate of the tetravalent metal and the hydroxide of the divalent metal (hereinafter may be simply referred to as an adsorbent) is the content of the fiber. It can be selected from the range of 0.1 to 25% by weight based on the whole. The adsorbent 100
The ratio to the weight part is preferably 10 to 750 parts by weight.
In the present specification, unless otherwise specified, the term “containment” includes the inclusion in the fiber by kneading the photocatalyst and the adsorbent, and the support by post-processing. The family number in the periodic table is based on IUPAC (International Union of Pure and
Applied Chemistry) Inorganic Chemistry Nomenclature Committee Nomenclature 19
According to the 70's edition. As described above, a composition composed of a phosphate of a tetravalent metal and a hydroxide of a divalent metal may be simply referred to as an “adsorbent”, and the adsorbent and another adsorbent as necessary. The composition constituted with the agent may be simply referred to as “adsorbent component”. The photocatalyst and the adsorbent may be collectively referred to as a “deodorant”.

Here, the photocatalyst constituting the deodorant will be described in more detail. The photocatalyst refers to a substance that generates active radicals by irradiation with light such as ultraviolet rays, oxidizes and decomposes many harmful substances and odorous substances, and functions as a photooxidation catalyst. For that purpose, the photocatalyst often belongs to the category of the oxidizing photocatalyst. When such a photocatalyst is used, the odor can be deodorized using catalytic decomposition instead of a mere adsorption action, so that the deodorizing or deodorizing effect can be maintained for a long time. Further, this photocatalyst not only decomposes harmful substances and malodorous substances, but also has a bactericidal action, an antibacterial action and the like.

As the photocatalyst, various types of optical semiconductors can be used irrespective of whether they are inorganic or organic, but are often inorganic optical semiconductors. As the photocatalyst, for example, a sulfide semiconductor (Cd
S, ZnS, In ₂ S ₃ , PbS, Cu ₂ S, Mo
S ₃ , WS ₂ , Sb ₃ S ₃ , Bi ₃ S ₃ , ZnCdS ₂
Etc.), metal chalcogenite (CdSe, In ₂ Se ₃ ,
WSe ₃ , HgSe, PbSe, CdSe, etc.), oxide semiconductors (TiO ₂ , ZnO, WO ₃ , CdO, In ₂ O)
₃ , Ag ₂ O, MnO ₂ , Cu ₂ O, Fe ₂ O ₃ , V ₂
O _5, SnO _2, etc.) and the like, as a semiconductor other than an oxide and sulfide, GaAs, Si, Se, CdP _3,
Zn ₂ P _{3 and the} like are also included. These photocatalysts can be used alone or in combination of two or more.

Among these photocatalysts, sulfide semiconductors such as CdS and ZnS, TiO ₂ , ZnO, SnO ₂ and WO ₃
Oxide semiconductors such as TiO ₂ and ZnO are particularly preferable. The crystal structure of the optical semiconductor constituting the photocatalyst is not particularly limited. For example, TiO ₂ may be any of anatase type, brookite type, rutile type, amorphous type and the like. Particularly preferred TiO ₂ includes anatase type titanium oxide.

The photocatalyst can be used in the form of a sol or a gel, or may be used in the form of a powder. When the photocatalyst is used in the form of powder, the primary average particle diameter of the photocatalyst can be selected within a range that does not impair the photoactivity and deodorizing efficiency.
m, preferably 0.05 to 1 μm. If the primary average particle size exceeds 5 μm, for example, filter clogging and fluff breakage are likely to occur during melt spinning. Conversely, if the primary average particle size is too small, secondary agglomeration tends to occur, which may cause problems such as filter clogging. In particular, when the conjugate fiber of the present invention is used as a fiber material for various kinds of clothing, a fine denier yarn having a single yarn fineness of about 1 denier is also required, and if the primary average particle diameter of the photocatalyst becomes large, the yarn breaks during drawing. Tends to be intense.

The amount of the photocatalyst to be used can be selected from a wide range which does not impair the catalytic activity, depending on the structure of the fiber. For example, 0.1 to 25% by weight, preferably 0.1 to 25% by weight, based on the whole fiber.
3 to 20% by weight, more preferably 0.5 to 15% by weight
, Especially in the range of 0.5 to 10% by weight.

On the other hand, the adsorbent (phosphate of tetravalent metal, hydroxide of divalent metal) constituting the deodorant will be described.
The group in the periodic table is not particularly limited as long as the tetravalent metal forming the phosphate is a tetravalent metal. Tetravalent metals include Group 4 elements of the periodic table, for example, Group 4A elements (titanium,
Zirconium, hafnium, thorium, etc.) and 4B group elements (germanium, tin, lead, etc.). Among these metals, metals belonging to Group 4A elements of the periodic table, such as titanium, zirconium, hafnium, and Group 4B elements, such as tin, are preferable. In particular, titanium and zirconium are preferred.

The phosphoric acid constituting the phosphate includes various phosphoric acids such as orthophosphoric acid, metaphosphoric acid, pyrophosphoric acid,
Triphosphate, tetraphosphate and the like. Phosphoric acid is often orthophosphoric acid, metaphosphoric acid or pyrophosphoric acid. Phosphates also include hydrogen phosphates such as ortho hydrogen phosphate. In this specification, phosphoric acid means orthophosphoric acid unless otherwise specified.

These tetravalent metal phosphates are usually water-insoluble or poorly soluble. Further, the phosphate may be a crystalline salt, but is preferably an amorphous salt. These tetravalent metal phosphates can be used alone or in combination of two or more.

The divalent metal forming the hydroxide may be a divalent metal irrespective of the group of the periodic table. The divalent metal includes, for example, a Group 1B element of the periodic table such as copper, magnesium,
Periodic table 2A for calcium, strontium, barium, etc.
Periodic table 2A such as group element, zinc, cadmium, etc. Periodic table 8 such as group 6A element such as chromium and molybdenum, group 7A element such as manganese, iron, ruthenium, cobalt, rhodium, nickel and palladium Group elements and the like. These divalent metal hydroxides may be used alone or in combination of two or more.

Preferred divalent metals include transition metals, for example, Group 1B elements such as copper, Group 2B elements such as zinc, Group 7A elements such as manganese, and Periodic Table 8 such as iron, cobalt and nickel. Group elements. Preferably copper,
Zinc, iron, cobalt and nickel.

These divalent metal hydroxides are generally water-insoluble or hardly soluble in a weakly acidic to weakly alkaline region (pH 4 to 10). The hydroxide may be crystalline, but is often amorphous.

The ratio between the phosphate of the tetravalent metal and the hydroxide of the divalent metal can be selected within a range that does not impair the catalytic activity, the ability to adsorb odor components and the ability to deodorize. Atomic ratio (divalent metal / tetravalent metal) = 0.1-1
0, preferably 0.2 to 7, more preferably 0.2 to
5 range. When a plurality of phosphates and / or hydroxides are used in combination, the metal atomic ratio based on the total amount of each metal may be within the above range. Further, a composition composed of a phosphate of a tetravalent metal and a hydroxide of a divalent metal may be compounded by coprecipitation or the like like a mixed gel. In particular, when the adsorbent composed of a combination of a phosphate of a tetravalent metal and a hydroxide of a divalent metal is used in combination with the photocatalyst described above by mixing or coprecipitation, high catalytic activity is exhibited. It is possible to efficiently remove various compounds such as odor components over a long period of time.

The amount of the adsorbent used can be appropriately selected according to the structure of the fiber in the same manner as the amount of the photocatalyst, and is, for example, 0.1 to 25% by weight, preferably 0.5 to 20% by weight based on the whole fiber. Furthermore, the range of 1 to 10% by weight is preferable. The amount of the photocatalyst is 1 to 1 with respect to 100 parts by weight of the adsorbent.
000 parts by weight, preferably 10 to 750 parts by weight, more preferably 20 to 500 parts by weight.

The above-mentioned deodorant is further used as another adsorbent (hereinafter referred to as "adsorbent").
(Referred to as an additional adsorbent). Such an additional adsorbent may be any of an inorganic adsorbent and an organic adsorbent, and may be a black adsorbent, but a non-black adsorbent, preferably a light to white or colorless adsorbent such as blue. Agents are often used. Inorganic adsorbents include aluminum oxide (alumina), silica (silicon dioxide),
Metal oxides such as copper oxide, iron oxide, cobalt oxide and nickel oxide; silicates such as silica gel, silica sol and zeolite; and clay minerals such as montmorillonite, allophane and sepiolite. Another adsorbent may be an adsorbent in which these components are complexed by coprecipitation or the like.
Organic adsorbents include various ion exchange resins having ion exchange functional groups such as carboxyl group, sulfone group, and amino group, and organic acid adsorbents having the acidic functional groups, porous polyethylene, porous polypropylene, And porous resins such as porous polystyrene and porous polymethyl methacrylate.

The type of the additional adsorbent can be appropriately selected according to the use of the fiber and the odor component. For example, when the fiber is exposed to a high temperature during the production process or during use, the use of an inorganic adsorbent is preferable. The additional adsorbent may be used alone or in combination of two or more, and at least one selected from a photocatalyst, a phosphate of a tetravalent metal, and a hydroxide of a divalent metal.
It may be mixed with two components or complexed by coprecipitation or the like.

The adsorbent constituting the above-mentioned deodorant may be combined with silicon dioxide which is useful for increasing the specific surface area and increasing the adsorption capacity. Examples of the silicon dioxide include an inorganic polymer having a high molecular weight itself, and a composite compound of silicon dioxide and a tetravalent metal phosphate. Further, silicon dioxide may be hydrated silicon dioxide. Such silicon dioxide may be crystalline, but is preferably amorphous. The content of silicon dioxide can be selected within a range that does not decrease the catalytic activity or adsorption performance of the photocatalyst. For example, in terms of the metal atom ratio with respect to the adsorbent, silicon / metal of the adsorbent = 0.2 to 10, preferably 0. The range is preferably 0.5 to 8, more preferably 1 to 7.

The above-mentioned deodorant may contain an antibacterial metal component (for example, silver, copper, zinc, lead, etc.) together with or without the additional adsorbent, especially a silver component. May be. A composition containing a silver component among the antibacterial metal components has high antibacterial performance and also has a broad antibacterial spectrum. The silver component may be metallic silver, and inorganic compounds (Agcl, AgF, AgF ₂₎
The silver halide etc., Ag ₂ 0, silver oxide, such as AgO, Ag
Sulfide such as S ₂ , Ag ₂ SO ₄ , Ag ₂ CrO ₄ , Ag
₃ PO ₄ , Ag ₂ CO ₃ , and oxyacid salts such as Ag ₂ O ₃ ). The silver component may be a complex with an adsorbent and an additional adsorbent. The silver component may be water-soluble, but is preferably water-insoluble or hardly water-soluble. These silver components can be used alone or in combination of two or more. The silver component can be easily introduced into a photocatalyst, an adsorbent, an additional adsorbent, etc. by a conventional method such as an ion exchange method or a coprecipitation method. The content of the silver component is from 0.1 to 10% by weight, preferably from 0.5 to 8% by weight, more preferably from 0.5 to 7% by weight, based on the total amount of the deodorant and the additional adsorbent, in terms of metallic silver.
A range of weight% is preferred.

In the present invention, the total amount of the deodorant, the optional adsorbent added as required, and the deodorant component composed of the silver component is within a range not impairing the properties of the fiber and the fiberization processability.
For example, the content is preferably in the range of 0.1 to 30% by weight, preferably 0.5 to 25% by weight, and more preferably 1 to 20% by weight based on the whole fiber.

The deodorizing component is preferably an amorphous substance, particularly a coprecipitated substance formed by coprecipitation. The amorphous deodorant component produced by coprecipitation is usually 10 to 1000 m ^2.
/ G, preferably from 30 to 1000 m ² / g, more preferably from 50 to 1000 m ² / g. Therefore, the fiber containing such a deodorant component functions as an adsorbent fiber having a high adsorptivity, and a deodorant fiber or a deodorant fiber for decomposing and removing various organic compounds or inorganic compounds including an odor component. It also functions as a fiber and also has antibacterial properties.

The deodorant component can be obtained by various conventional methods. For example, a tetravalent metal phosphate, a hydroxide of a divalent metal and a photocatalyst may be mixed with an additional adsorbent (such as silicon dioxide) and / or a silver component, if necessary, so that the deodorant component can be obtained. It can be obtained easily. At the time of the mixing, the respective powdery components obtained by pulverization or the like may be mixed.

The adjustment of the photocatalyst is carried out according to a conventional method, for example, a method of forming a water-insoluble precipitate from an aqueous solution containing a metal ion corresponding to the photocatalyst, a method of adjusting from a metal alkoxide, a gas phase method of oxidizing at a high temperature, and the like. be able to.

In producing the photocatalyst, a compound containing a component corresponding to the catalyst can be used. This will be described using titanium oxide as an example. TiC as such a component
titanium halide such as l ₄ , TiF ₄ , TiBr ₄ , T
i (SO ₄ ) ₂ , sulfates such as TiOSO ₄ , (CH
₃ O) ₄ Ti, (C ₂ H ₅ O) ₄ Ti, [CH ₃ (CH
₂ ) O] ₄ Ti, [(CH ₃ ) ₂ CHO] ₄ Ti, [C
H ₃ (CH ₂ ) ₃ O] ₄ Ti, [(CH ₃ ) ₂ CHCH
C _1-6 alkoxy titanium such as ₂ O] ₄ Ti can be used. Alternatively, a titanium oxide sol or the like that has been adjusted in advance may be used.

The deodorant component includes a solution containing a tetravalent metal ion, a divalent metal ion and a component corresponding to a photocatalyst,
It can also be obtained by a method of using an aqueous solution containing two or more of these metal ions to form a mixed precipitate of those water-insoluble substances. The mixed precipitate obtained by this method is usually in a gel state, and becomes a mixture having an amorphous structure by drying. In this method, it is preferable that the component corresponding to the photocatalyst is adjusted to an appropriate crystal structure in advance and added to the aqueous solution.

Various aqueous metal compounds are used to prepare an aqueous solution containing a tetravalent metal ion, a divalent metal ion and a silver ion. Examples of such aqueous metal compounds of divalent metal, tetravalent metal and silver include various metal salts and metal alkoxides. As metal salts,
In addition to normal metal salts (normal salts), acid salts, oxy salts, and other metal salts in the form of double salts and complex salts may be used. Further, the metal salt may be a compound that is insoluble when the pH of the aqueous solution is near neutral, or a compound that dissolves in an acidic solution. Specific examples include the following compounds.

(1) Metal fluorides, chlorides, bromides,
Halides such as iodide, (2) sulfate, ammonium sulfate, other sulfate (inorganic acid salt), (3) nitrate (inorganic acid salt), (4) chlorate, perchlorate, thiocyanic acid Salts, various inorganic acid salts such as diammine silver sulfate, diammine sulfate, chromate, (5) organic acid salts such as acetate, formate, oxalate, and (6) oxymetal salts (halides) Oxymetal salts in the form of inorganic acid salts and organic acid salts), and (7) metal alkoxides.

Of these metals, inorganic acid salts, particularly strong acid salts such as sulfates and nitrates, are often used. In addition, an oxymetal salt is often used as a titanium compound or a zirconium compound among tetravalent metal compounds.

Examples of the water-soluble silicate compound which is a source of silicate ions for silicon dioxide include alkali metal silicates such as sodium silicate and potassium silicate, and silicates such as calcium silicate and barium silicate. Alkaline earth metal salts, ammonium silicate and the like. Also, silicon dioxide need not be water-soluble,
For example, silicon dioxide xerogel (silica gel),
It is also possible to use a hydrosol or hydrogel as a raw material. As a silicate ion source, an alkali silicate, preferably an alkali metal silicate, a hydrosol or a hydrogel is usually used, and sodium silicate is particularly preferred in terms of cost and handling.

In order to produce a phosphate of a tetravalent metal and a hydroxide of a divalent metal, a hydroxide of a divalent metal is produced in the presence of a phosphate of a tetravalent metal and a divalent metal ion. Just do it. For example, (i) a phosphate of a tetravalent metal may be formed in an aqueous solution in which a tetravalent metal ion and a divalent metal ion coexist, and then a hydroxide of a divalent metal may be formed; After a phosphate of a tetravalent metal is previously generated in an aqueous solution containing no divalent metal ion, an aqueous solution containing a divalent metal ion may be added to generate a hydroxide of the divalent metal.

In the above method (i), when the composition is produced using an aqueous solution in which a tetravalent metal ion and a divalent metal ion coexist, the aqueous solution containing the tetravalent metal compound and the divalent metal compound is stirred. Phosphoric acid or phosphate may be added to form a precipitate of phosphate of tetravalent metal while suppressing generation of insoluble hydroxide of divalent metal.
In this method, the pH of the aqueous solution containing the tetravalent metal compound and the divalent metal compound is usually in an acidic range, for example, the pH is in the range of 0 to 6, and if necessary, controls the production of the divalent metal hydroxide. To add acid to pH 4
Adjusted below, phosphoric acid or phosphate may be added.

When adjusting the pH of the aqueous solution, an appropriate alkali or acid can be used. As the alkali, hydroxides of alkali metals or alkaline earth metals (such as sodium hydroxide, potassium hydroxide and calcium hydroxide), inorganic bases such as ammonia, and organic bases such as trimethylamine, triethylamine, and triethanolamine can be used.
As the acid, inorganic acids such as hydrochloric acid, nitric acid, and sulfuric acid, and organic acids such as acetic acid, trichloroacetic acid, trifluoroacetic acid, formic acid, and oxalic acid can be used.

The phosphoric acid or phosphate used for producing the insoluble phosphate includes oritoric acid, metaphosphoric acid,
Examples include pyrophosphoric acid and their alkali metal salts (such as sodium salt and potassium salt) and ammonium salts. Specifically, phosphates include sodium monophosphate, sodium phosphate dibasic, sodium phosphate tribasic [hereinafter simply referred to as sodium phosphate], potassium phosphate, ammonium phosphate, sodium metaphosphate , Potassium metaphosphate, sodium pyrophosphate, potassium pyrophosphate and the like.

In the above method (i), the phosphate of the tetravalent metal produced is usually more often precipitated than ripened. As the ripening method, a conventional method, for example, a method of leaving it at room temperature for a long time, a method of leaving it heated at 100 ° C. or less for a long time, a method of heating and refluxing, and the like can be used.

After completion of the ripening, the pH is adjusted to a neutral range, for example, pH 4 to 12, by adding an alkali, whereby a hydroxide of a divalent metal can be produced. The production of the hydroxide is carried out by simultaneously adding an alkali and a solution containing a tetravalent metal phosphate and a divalent metal ion after aging in a neutral region, for example, in a pH range of 4 to 12. May be added. In the pH range as described above, a precipitate composed of a hydroxide of a divalent metal is formed, and the precipitate of the formed hydroxide and a precipitate of an insoluble phosphate of a tetravalent metal are precipitated, or a precipitate mixture or a mixture thereof. Formed as a sedimentation mixture. In the production of a hydroxide of a divalent metal, if the reaction at normal temperature is slow, the reaction system may be heated. If necessary, the reaction may be carried out under pressure at a temperature of 100 ° C. or higher. The stirring may be performed by bubbling using air.

In the method (ii), the precipitate of the phosphate of the tetravalent metal and the hydroxide of the divalent metal can be formed according to the method of the above (i). That is, phosphoric acid or phosphate is added to the aqueous solution containing tetravalent metal ions and not containing divalent metal ions to generate phosphate in advance. After the produced phosphate is aged as necessary, the pH is adjusted to an acidic range of 4 or less, if necessary, and an aqueous solution containing divalent metal ions (for example, an aqueous solution containing a metal salt) is added and mixed. Similarly, a mixed precipitate may be formed by adjusting the pH to a neutral range of 4 or more. In this method, the ripening of the phosphate of the tetravalent metal may be relatively short.

The photocatalyst may be added to the reaction system for producing the phosphate of the tetravalent metal and the hydroxide of the divalent metal, for example, in the form of powder, and the phosphate and / or tetravalent metal may be added.
Alternatively, after a hydroxide of a divalent metal is generated, it may be added to a reaction system or a generated precipitate.

Further, the photocatalyst may be produced simultaneously with the production of the phosphate of the tetravalent metal and / or the hydroxide of the divalent metal. For the production of the photocatalyst, the above methods (i) and (ii) can be used. For example, when producing titanium oxide, a titanium halide such as titanium chloride, an inorganic acid salt (sulfate such as titanium sulfate) or an alkoxide is added to the reaction system as required, and the pH of the reaction system is adjusted to neutral or alkaline. It can be generated by adjusting to.

When preparing a composition containing silicon dioxide, silicon dioxide and / or silicate ion species may be added in at least one step of the precipitate formation reaction, and the photocatalyst component and the like may be added. Silicon dioxide may be mixed with the resulting precipitate containing the silicon dioxide. When silicon dioxide is formed together with the formation of the precipitate, an alkaline silicate solution (eg, sodium silicate, potassium silicate, etc.) can be used instead of alkali. When a silicate ion species is used, a hydrous silicon dioxide can be generated by adjusting the pH to a neutral range of 4 to 12 together with the generation of a hydroxide of a divalent metal.

Further, regarding the silver component, the silver component is contained by adding a silver component, for example, a water-insoluble compound of silver and / or a silver ion species in at least one step of the precipitation product reaction, similarly to the silicon dioxide. A deodorant component can be obtained. Silver components such as silver ions can be easily converted to the photocatalyst, phosphate, hydroxide, silicon dioxide or at least one or more of these components by a conventional method such as an ion exchange method or an impregnation method. Can be carried on

The precipitate thus obtained may be purified by a conventional method, if necessary. For example, the reaction solution containing the precipitate such as the mixed precipitate is filtered, washed with a washing solvent such as warm water or water, to remove impurities such as metal salt anion species, and purified by drying. A deodorant component can be obtained. The filtration can be performed under normal temperature, normal pressure, reduced pressure, or increased pressure using a filter paper, a filter cloth, or the like, and may be performed using a centrifugal separation method, a vacuum filtration method, or the like. In cleaning, an inclined cleaning method or the like may be used. The drying operation may be performed by a conventional method, for example, air drying, or may be performed at a temperature lower than the decomposition temperature of the deodorant component, for example, at a temperature of about 400 ° C. or lower, preferably 200 ° C. or lower. .

Examples of the polyamide containing the above-mentioned deodorant include nylon 4, nylon 6, nylon 7, nylon 11, nylon 12, nylon 66, nylon 6,
10. Polymetaxylene adipamide, polyparaxylenedecaneamide, polybiscyclohexylmethanedecaneamide, and copolyamides containing these as components. Preferably, nylon 6 and polyamide containing nylon 6 as a main component are suitable. An important requirement is that the reduced viscosity of the polyamide satisfies a certain range. The viscosity is measured using an Ubbelohde viscometer at a concentration of 1 g / 100 cc at 30 ° C. in an O-chlorophenol solution, and the reduced viscosity η _sp / C falls within the range of 1.6 to 2.2. Is desirable. When the reduced viscosity is less than 1.6 or more than 2.2, it is found that fluff and yarn breakage occur during the fiberizing step, resulting not only in poor processability but also in a decrease in splitting property of the conjugate fiber. As described above, the combination of the preferred viscosity range of the polyester and the preferred viscosity range of the polyamide provides high-speed spinnability and minimizes the difference in strain in the molecular structure of the composite bicomponent interface of the obtained composite fiber. It is considered that it is internalized and good division property in the post-processing step is developed. Further, it will be described later that the presence of the inorganic fine particles having an appropriate primary average particle diameter and an appropriate content in the polyester also has a favorable synergistic effect on the ease of separation when subjected to chemical and physical treatments. It was discovered for the first time by producing fibers by a conventional manufacturing method.

The polyester which is one important composite component of the present invention is not particularly limited as long as it is a polyester which can be melt-spun, and the fiber-forming polyester is preferably polyethylene terephthalate, polybutylene terephthalate or ethylene terephthalate. It is preferably a copolyester containing a main unit or a butylene terephthalate unit as a main constituent unit and containing a small amount of another copolymerized unit, and more preferably polyethylene terephthalate.

When a copolyester mainly comprising ethylene terephthalate units and / or butylene terephthalate units is used as the fiber-forming polyester, the proportion of other copolymerized units in the copolyester is preferably at most 10 mol%. Examples of other copolymerized units at that time include aromatic dicarboxylic acids such as isophthalic acid, phthalic acid, 2,6-naphthalene dicarboxylic acid and 5-alkali metal sulfoisophthalic acid; oxalic acid, adipic acid, azelaic acid , Aliphatic dicarboxylic acids such as sebacic acid; polyfunctional carboxylic acids such as trimellitic acid and pyromellitic acid; or carboxylic acid units derived from their ester-forming components; diethylene glycol, propylene glycol, butanediol or ethylene glycol; Polyethylene grease Lumpur, glycerin, may be mentioned polyhydric alcohols units derived from pentaerythritol. The copolyester can contain one or more of the above-mentioned copolymer units.

The polyester used in the present invention must contain inorganic fine particles satisfying certain conditions, and must satisfy a specific range of viscosity. That is, it is important that the product X of the primary average particle diameter (μ) of the inorganic fine particles in the polyester and the content (% by weight) in the polymer satisfies the range of 0.01 ≦ X ≦ 3.0. As the inorganic fine particle diameter, it is necessary to contain inorganic fine particles having a primary average particle diameter of 0.01 to 5.0 μm. In this case, as the inorganic fine particles, any inorganic fine particles which do not have a deteriorating effect on the polyester forming the fiber and have excellent stability by themselves can be used. Representative examples of the inorganic fine particles that can be effectively used in the present invention include silica, alumina, calcium carbonate, titanium oxide, barium sulfate, and the like.Even if these inorganic fine particles are used alone,
Alternatively, two or more kinds may be used in combination. When two or more kinds are used in combination, the particle diameter (a ₁ ,
a ₂ ,... a _n ) and the content (b ₁ , b ₂ ,... b _n ) must satisfy the above range. That is, X = a ₁ ×
_{b 1 + a 2 × b 2} + ... a n × b n of X is to satisfy the above range.

As described above, the inorganic fine particles contained in the polyester have a primary average particle size of 0.01 to 5.0.
It is necessary that the thickness be in the range of 0.03 to 3.0 .mu.m. The primary average particle diameter of the inorganic fine particles is 0.
When the diameter is less than 01 μm, even if the temperature of the heating zone for drawing, the running speed of the yarn, and the tension applied to the speed yarn are slightly changed, loops, fluff, fineness unevenness, etc. are generated in the composite fiber. I will be. On the other hand, when the primary average particle diameter of the inorganic fine particles exceeds 3.0 μm, the stretchability of the fiber is reduced, and the yarn forming property becomes poor. Here, the primary average particle diameter of the inorganic fine particles referred to in the present invention refers to a value measured by using a centrifugal sedimentation method, and details thereof are described in Examples below.

Further, as described above, in the present invention, the content of the inorganic fine particles is 0.0% based on the weight of the polyester.
5 to 10.0% by weight, and 0.3 to
Preferably, it is 5.0% by weight. If the content of the inorganic fine particles is less than 0.1% by weight based on the weight of the polyester, slight fluctuations in the temperature of the heating zone for stretching, the running speed of the yarn, the tension applied to the running yarn, and the like may occur. Even if it occurs, loops, fluffs, unevenness of fineness and the like are generated in the obtained composite fiber, while the content of inorganic fine particles is 10.0.
If the amount is more than 10% by weight, the inorganic fine particles make the resistance between the running yarn and the air excessive in the fiber drawing process, leading to the generation of fluff, the breakage of the yarn, and the process becomes unstable.

The method for adding the inorganic fine particles to the polyester is not particularly limited, and the inorganic fine particles may be added and mixed in an arbitrary stage immediately before melt-spinning the polyester so that the inorganic fine particles are uniformly mixed. I just need. For example, the inorganic fine particles may be added at any time during the polycondensation of the polyester, may be added later during the production of pellets in the polyester that has been polycondensed, or when melt spinning of the polyester. Before the polyester is spun from the spinneret, inorganic fine particles may be uniformly melt-mixed in the polyester.

In addition to the above-mentioned inorganic fine particles, the polyester may be, if necessary, a fluorescent whitening agent, a stabilizer, an antioxidant, an ultraviolet absorber, a hydrolysis inhibitor, an antistatic agent, a flame retardant, a coloring agent. It may contain one or more kinds of agents and other additives. Further, when the product X of the primary average particle diameter (% by weight) and the content of the inorganic fine particles (μ) in the polyester is less than 0.01, loops, fluff, fineness unevenness and the like are generated in the conjugate fiber, and the processability is poor. Not only that, there were many undrawn portions in the obtained fiber, and it could not be used for clothing. In addition, it has been found that the division property, which is an important object of the present invention, is deteriorated. The reason why the splitting property is poor is not clear at the present time, but when a splitting promoting treatment such as alkali weight reduction treatment or false twisting treatment is performed in the post-processing step, the interface between the polyester and the polyamide becomes inorganic. It is considered that the generation of strain with the fine particles as nuclei was insufficient and the dividing property was inferior. When the product X of the primary average particle diameter and the content exceeds 3.0, the dividing property in the post-processing is good,
Unnecessary fluff and breakage during the fiberization process cause poor processability.

Another requirement is that the polyester satisfy a specific range of viscosities. The viscosity was measured at a concentration of 1 g / 100 cc at 30 ° C. in an o-chlorophenol solution using an Ubbelohde viscometer, and the reduced viscosity η _sp / C at that time was 0.65 to 1.0 dl / g, preferably It is preferable to use 0.7 to 0.9 dl / g polyester from the viewpoint of spinnability and splitting property of the obtained conjugate fiber. When it is lower than 0.65, fluff during the fiberizing process,
Not only is thread breakage, resulting in poor processability, but also poor splitting of the conjugate fiber, which is not preferable. On the other hand, if it is higher than 1.0, it is also found that the fiberization processability is similarly poor and the division property is lowered, which is not preferable. η _sp / C is 0.65
The reason why the splitting property of the conjugate fiber is preferably in the range of from 1.0 to 1.0 dl / g is that the difference in strain in the molecular structure after the stretching with the polyamide component is the most internal, and the spinning at the time of spinning due to the fiberization process. This is probably due to the good viscosity of the yarn. In addition, it has been found that the highest viscosity range is obtained in the production method by high-speed spinning as described later.

In the composite fiber of the present invention, a polyamide component containing a deodorant and a polyester component having a low affinity for polyamide are included in a cross section of one filament in the cross section of a single filament. In a shape that does not completely surround the conjugate fiber, and is joined along the longitudinal direction of the single filament, and specifically, has a cross section of a side-by-side type composite fiber as shown in FIG. 1, a side-by-side repeating type composite fiber as shown in FIG. 2, A composite fiber composed of a component having a radial shape as shown in FIGS. 3 to 6 and another component having a shape complementary to the radiating portion, and a component having a radial shape and complementing the radiating portion as shown in FIG. And another component having the same shape as the component having the V-shaped concave portion oriented toward the center and the radial component having the V-shaped shape complementing the concave portion. Side-by-side repeating type composite fibers with a hollow portion as fibers and 8 can be mentioned.

A major feature of the conjugate fiber of the present invention is that it is easily divided into components by subjecting it to a chemical treatment such as an alkali weight reduction treatment, a polyamide expansion agent treatment and / or a physical treatment such as a false twisting treatment. is there. Here, “split” means that, for example, when the composite fiber has a cross section as shown in FIG.
A state in which the joint portion of each component is divided into 11 fine fibers composed of 5 segment yarns of the A component and 6 segment yarns of the B component. In the case of having a cross section as described above, five fine fibers are similarly divided into one segment yarn of the A component having a cross-shaped cross section and four segment yarns of the B component having a fan-shaped cross section. It is the state that becomes. Further, even if the conjugate fiber has any other cross-sectional shape, the state of splitting can be easily inferred from the above description.

The degree of division of the conjugate fiber after the division treatment is as follows:
A major feature is that it is at least 80%. Here, the division degree refers to a value measured by the following method. That is, an arbitrary 100 cross-sections of the composite fibers (including those that are divided into fiber bundles, those that are partially divided, and those that are not completely divided) in the area to be measured are observed. Then, the divided fine fibers (N) which are actually divided and exist are counted. In this case, the number of the conjugate fibers which are not completely divided is one, and the one which is partially divided is the total number of the half-divided conjugate fibers and the number of the divided fine fibers which are divided therefrom. Next, the divided fine fibers (N
p) is calculated, and the value of N / Np × 100 is set as the division degree.
The degree of division was set at 98 ° C. in an aqueous alkaline solution (concentration: 4 g / liter) under the condition of division treatment.
For 5 to 20 minutes and then dried.

In the method for producing a conjugate fiber according to the present invention, first, a polyester containing inorganic fine particles and a polyamide containing a deodorant are melt-extruded by separate extruders, respectively, introduced into a spinning head, and each of the objective individual fibers is introduced. Melt spinning through a spinneret that forms a composite shape. In this case, the melt spinning temperature, the melt spinning speed and the like are not particularly limited, and the melt spinning can be performed under the same conditions as those usually used for producing a polyester fiber. If the high polymer is a polyester, the melt spinning temperature generally ranges from (melting point of polyester + 20 ° C.) to (melting point of polyester + 40 ° C.) (eg, generally about 280-300 ° C. if the polyester used is polyethylene terephthalate). And a melt spinning speed (amount of melt spinning) of about 20 to 50 g / spinning hole of about 1 mm ² · min is preferable, since a conjugate fiber of good quality can be obtained with good spinning processability. In addition, the size and number of the spinning holes in the spinneret, the shape of the spinning holes and the like are not particularly limited,
It can be adjusted according to the single fiber fineness, the total denier number, the cross-sectional shape and the like of the target conjugate fiber. Generally, it is desirable to set the size of the spinning hole (single hole) to about 0.018 to 0.07 mm ² . In the case where the nozzle dirt accumulates around the hole of the spinneret and the yarn breaks, a method of blocking the oxygen by forming the nozzle hole outlet in a tapered shape or steam sealing the atmosphere under the spinneret is preferable.

Then, the composite fiber melt-spun as described above is cooled to a temperature lower than the glass transition temperature of the polymer having a low glass transition point of the composite bicomponent polymer, preferably 10 ° C. or lower than the glass transition temperature. I do. The cooling method and the cooling device in this case are not particularly limited as long as the method and the device can cool the spun conjugate fiber to the glass transition temperature or lower, but there is no particular limitation. It is preferable that a cooling air blowing device is provided, and the spun conjugate fiber is blown with a cooling air to cool the composite fiber to a glass transition temperature or lower. At this time, the cooling conditions such as the temperature and humidity of the cooling air, the blowing speed of the cooling air, and the blowing angle of the cooling air to the spun fibers are not particularly limited. Any condition may be used as long as the condition allows rapid and uniform cooling to the glass transition temperature or lower while preventing the occurrence. Among them, generally, the temperature of the cooling air is about 20 to 30 ° C. and the humidity of the cooling air is 20 to 60 ° C.
%, The blowing speed of the cooling air is set to about 0.4 to 1.0 m / sec, and the direction of the blowing of the cooling air to the spun fibers is perpendicular to the spinning direction to cool the spun composite fibers. It is preferable because a high-quality composite fiber can be obtained smoothly. When cooling is performed under the above conditions using a cooling air blowing cylinder, the length is about 80 to 160 c with a slight or no interval directly below the spinneret.
It is preferable to arrange a cooling air blowing cylinder of about m.

Next, the conjugate fiber cooled to the glass transition temperature or lower is subsequently directly introduced into the heating zone and drawn. The temperature of the heating zone may vary depending on the type of polyester, etc., but generally, if the temperature is 40 ° C. or higher than the glass transition temperature of polyester and polyamide, the physical properties of the obtained composite fiber will be practically satisfactory. For example, in the case of a composite fiber of polyethylene terephthalate and nylon 6, the temperature of the heating zone is preferably about 100 ° C. or higher. The upper limit temperature of the heating zone is determined by fusing or breaking yarn between fibers in the heating zone,
The temperature may be any temperature at which single yarn breakage does not occur. The type and structure of the heating zone can heat the conjugate fiber traveling in the heating zone without contacting the heating means in the heating zone, and furthermore, the yarn traveling in the heating zone and the air surrounding it. Any structure can be used as long as the resistance can be generated between them and the yarn tension can be increased so that the fiber can be drawn. Among them, as the heating zone,
A tubular heating zone is preferably used, and in particular, a tube heater having an inner diameter of about 20 to 50 mm or the like in which the tube wall itself is a heater is preferable.

The installation position of the heating zone from the spinneret gold, the length of the heating zone, etc. depend on the type of conjugate fiber, the amount of conjugated bicomponent polymer spun, the cooling temperature of the conjugate fiber, the running speed of the conjugate fiber, the heating zone. The temperature can be adjusted according to the inner diameter of the heating zone and the like. Generally, the distance from immediately below the spinneret to the entrance of the heating zone is about 0.5 to 3.0 m, and the length of the heating zone is 1.0 to 3.0 m. A length of about 2.0 m is desirable because the conjugate fiber can be heated and stretched uniformly and smoothly in the heating zone.

Then, an oil agent is applied to the conjugate fiber drawn in the heating zone, if necessary, and then taken out at a high speed. In the present invention, the process of producing a stretched conjugate fiber comprising the above-described series of steps is performed by setting the take-up speed of the conjugate fiber to 350.
It is necessary to carry out the process at 0 m / min or more, and the take-up speed is preferably 4000 m / min or more. When the take-up speed of the conjugate fiber is less than 3500 m / min, the drawing of the fiber in the heating zone is not sufficiently performed, the mechanical properties of the obtained conjugate fiber are reduced, and the present invention comprising the above-described series of steps is performed. The method is not carried out smoothly, and in particular, fluctuations in the tension of the yarn in the heating zone, overheating, etc. occur, making it difficult to perform uniform stretching. In carrying out the method of the present invention, the value of {take-up speed (m / min) of the conjugate fiber} / (the amount of conjugate fiber spun (25 g / spinning hole 1 mm ² · min)} is about 140 to 200. It is preferable to set it within the range.

In the present invention, the monofilament fineness and the total denier of the composite fiber finally obtained are not particularly limited and can be appropriately adjusted depending on the use of the composite fiber.
The method of the present invention particularly has a single fiber fineness of 0.5 to 6 denier,
It is suitable for producing a composite fiber (multifilament yarn) having a total denier of 30 to 150 denier. The composite fiber of the present invention can be used as various fiber structures.

The fibrous structure using splittable conjugate fibers according to the present invention is a knitted or woven fabric composed of splittable conjugate fibers alone.
Needless to say, nonwoven fabrics, knitted or nonwoven fabrics partially using splittable conjugate fibers, such as cross-woven fabrics with ordinary natural fibers, chemical fibers, and synthetic fibers, or knitted or nonwoven fabrics as blended yarns However, the ratio of the splittable conjugate fiber in the knitted or woven fabric or the nonwoven fabric is preferably 10% by weight or more, particularly preferably 30% by weight or more, from the viewpoint that the sufficient effects of the present invention can be obtained. In addition, even if the knitting, weaving, or nonwoven fabric is used, and then raised by needle cloth raising or the like as necessary, the present invention does not matter at all.

In the present invention, as a method of adding a deodorant comprising a photocatalyst and an adsorbent to a polyamide which is one component of the composite component, a method of adding a deodorant during or immediately after polymerization of the polyamide, A masterbatch is prepared by adding a deodorant to a polyamide, and a method of using the masterbatch is used. In any steps until the polyamide is spun (for example, a step of preparing polymer pellets, a step of melt-spinning, and the like). There is a method of adding a deodorant.
Among these methods, the method of adding a deodorant to the raw material monomer of the polyamide, the method of adding a deodorant immediately after the prepolymer is produced, and the method of adding the deodorant immediately after the prepolymer is further polycondensed, Therefore, a method of adding a deodorant while it is still in a liquid state can be adopted, but the deodorant used in the present invention has a very high catalytic activity, so that depending on the type of polymer, the polymerization reaction proceeds. There is a need to be careful. The above-described method is preferable in consideration of the process.

The deodorant is added in the form of fine particles. However, if the particles are added to the polymer as it is, it becomes difficult to fibrillate due to agglomeration of the particles. In some cases, it is preferable to add the polymer to the polymer in the form of a slurry dispersed in an appropriate dispersion medium.

The thickness of the fiber of the present invention is not particularly limited as long as it is a bicomponent polymer forming a composite component or each of the above-mentioned requirements is satisfied. Is not limited. That is, the fibers may have substantially the same diameter in the length direction of the fibers, may be thick and thin fibers having a large thickness, or may be other fibers. Further, the fiber may be either a short fiber or a long fiber. When the fiber product is a yarn, it may be a spun yarn, a multifilament yarn, or a composite yarn of a short fiber and a long fiber. Further, the fiber of the present invention, depending on the application and the type of fiber, false twist processing, air entanglement processing such as interlace processing and Taslan processing, crimping processing, shrink-proof processing, anti-wrinkle processing, hydrophilic processing, waterproof processing, Arbitrary processing and treatment such as anti-dyeing processing may be performed. The deodorant fiber of the present invention, in addition to the deodorant described above, various additives used for the fiber according to the type of fiber, for example, an antioxidant, a flame retardant, an antistatic agent, a coloring agent, a lubricant, It may contain an antibacterial agent, an insect / miticidal agent, a fungicide, an ultraviolet absorber, a matting agent, and the like.

The deodorant fibers of the present invention can be used as various fiber products, and include yarns; fabrics such as woven fabrics, knitted fabrics and nonwoven fabrics; pile fabrics such as pile fabrics and pile knits; Clothing and other body-worn articles; interior products; bedding; food packaging. Specifically, clothing and bodies such as underwear, sweaters, jackets, pajamas, yukata, white robes, slacks, socks, gloves, stockings, aprons, masks, towels, handkerchiefs, supporters, headhands, hats, shoe insoles, interlining, etc. Wearing goods; various carpets, curtains, wallpapers,
Shoji paper, sliding doors, textile blinds, artificial houseplants, cloth for upholstery such as chairs, tablecloths, electrical product covers, folds, pillows, pillow covers, bed covers, bed filling materials, mats, sanitary materials, toilet seats Examples include a cover, a wiping cloth, a filter such as an air purifier and an air conditioner, and various materials for clothing.

The deodorant fiber of the present invention and a fiber product using the fiber can be obtained by irradiating sunlight, a fluorescent lamp, an ultraviolet lamp or the like.
Many odor components such as basic odor components such as ammonia and amines, acidic odor components such as acetic acid, and neutral odor components such as formalin and acetaldehyde can be decomposed quickly and over a long period of time to deodorize. . Therefore, even a tobacco odor containing a large number of odor components can be efficiently removed, which is effective for deodorizing a room or a vehicle. It is also effective for deodorizing aldehydes such as formalin and acetaldehyde generated from furniture and new building materials.

Further, the deodorant fiber containing a deodorant component adsorbs an acidic odor component, a basic deodorant component and the like effectively without irradiating light, and effectively deodorizes it. Under the light irradiation of lamps, etc., the synergistic effect of the oxidative decomposition action of the photocatalyst and the high adsorption action of the adsorbent not only enhances the deodorizing performance against acidic odor components and basic odor components, but also neutralizes aldehydes and other neutral odor components. It shows a high deodorizing effect on odor components, and the effect lasts for a long time. In addition, even if oxidative decomposition products generated by the action of the photocatalyst (for example, acetic acid is generated in the case of acetaldehyde) are partially released and may newly cause odor, the use of the adsorbent also Oxidative decomposition products can be adsorbed. Therefore, the release or desorption of the oxidative decomposition products can be prevented, and the deodorizing efficiency can be further improved. In addition, the substance adsorbed by the adsorbent is further decomposed by the photocatalyst, so that the deodorizing effect is maintained for a long time.

In the light irradiation, a light beam having a wavelength corresponding to the photocatalyst can be used. The wavelength of this light beam may be a wavelength that excites the photocatalyst, but is usually ultraviolet light or a light beam containing ultraviolet light in many cases. In the case of using titanium oxide as a photocatalyst, the catalyst function can be effectively exerted even with sunlight or fluorescent light. The light irradiation is usually
It is performed in the presence of an oxygen-containing gas such as oxygen or air.

Furthermore, in the present invention, the use of a photocatalyst also provides antibacterial performance. That is,
When a photocatalyst such as titanium oxide is irradiated with light having the band gap energy, electrons are excited from the valence band to generate electrons in the conductor and holes in the valence band. These electrons and holes have highly reactive reducing ability and oxidizing ability, respectively, and can induce a catalytic reaction on the surface of the catalyst. Utilizing the high reducing ability and oxidizing ability, various harmful substances can be oxidized and detoxified to make them harmless, and sterilization can be performed.

The deodorant fiber of the present invention can maintain the deodorant effect for a long time by the above-mentioned deodorant. However, with the deodorant alone, it is possible to reduce high-concentration odor components to some extent, but it is not possible to completely suppress low-concentration odor components to “zero”, and the fiber ratio is low. Only by specifying the surface area can the low-concentration odor components be removed to almost “zero”.

[0078]

EXAMPLES The present invention will be described below in more detail with reference to examples and the like, but the present invention is not limited thereto. In the following examples, the primary average particle diameter of the inorganic fine particles,
Spinnability of composite fiber, strength of composite fiber finally obtained,
The elongation, uniformity (Worcester spots: U%), and the number of fluffs generated were measured or evaluated as follows.

Measurement of primary average particle size of inorganic fine particles : centrifugal particle size measuring device (“CAPA-5000” manufactured by Horiba, Ltd.)
Calculated based on the centrifugal sedimentation curve obtained using.

Spinnability of composite fiber : 100 kg of composite fiber
Spinning, checking the presence or absence of breakage during spinning and visually observing the occurrence of fluff in the obtained composite fiber,
The evaluation was performed according to the following evaluation criteria. Evaluation criteria for spinnability of composite fiber A: No breakage occurs during spinning, and no fluff is generated in the obtained composite fiber, and spinnability is extremely good. ：: No yarn breakage occurred during spinning, and the obtained conjugate fiber was slightly fuzzy, but the spinning properties were almost good. △: When spinning 100kg, thread break occurs up to 3 times,
Poor spinnability. X: When 100 kg was spun, thread breakage occurred more than three times, and the spinnability was extremely poor.

Strength of composite fiber : The strength of the composite fiber was determined from the load-elongation curve obtained using an Instron type tensile tester.

[0082] elongation of the composite fiber: Instron type tensile tester load obtained using the - was determined elongation of the composite fiber from the extension curve.

Uniformity of composite fiber (Worcester spots: U value) :
The yarn was passed between the electrodes at a constant speed using a Worcester spot tester manufactured by Zellberger (yarn speed 100 m / min, range ±
(12.5%, chart speed 10 cm / min), a change in electric capacity proportional to a change in cross section was continuously measured, and an average deviation coefficient “U%” of a constant length of the yarn was measured.

The number of fluffs generated in the composite fiber : The fluffs present in a yarn length of 10 ⁷ m or more are detected by a fluff sensor manufactured by Sun Electronics Industry Co., Ltd., and converted into the number of fluffs per 10 ⁶ m of yarn length. did.

Deodorizing test a. Initial performance Under normal incandescent fluorescent light irradiation (500 lux), 15 cm
Sample 3 in a Tedlar bag (3 liter capacity)
g and sealed, and then air containing a predetermined concentration of odor component was injected into the Tedlar bag using a syringe so that the total gas volume was 3 liters. The injected gas was ammonia 40 ppm, hydrogen sulfide 15 ppm, and acetaldehyde 50 ppm. After a specified time after the gas was injected, the gas in the Tedlar bag was sampled with a microsyringe, and the gas concentrations of hydrogen sulfide, acetic acid, and acetaldehyde were measured by gas chromatography (GC-7A manufactured by Shimadzu Corporation).
And the removal rate of odor components was calculated by the following equation. For ammonia, the gas concentration in the Tedlar bag was directly measured using a gas detector tube (manufactured by Kitagawa Corporation for ammonia), and the odor component removal rate was calculated. Removal rate (%) = [(Co-C) / Co] × 100 Co: initial gas concentration C: gas concentration after 1 hour b. Repeated deodorization performance Under normal incandescent fluorescent light irradiation (500 lux), 15 cm
Sample 3 in a Tedlar bag (3 liter capacity)
g and sealed, and then air containing a predetermined concentration of odor component was injected into the Tedlar bag using a syringe so that the total gas volume was 3 liters. The injected gas was acetic acid 4
It was 0 ppm. One hour after the gas was injected, the gas concentration was measured by a gas chromatography method. Thereafter, this was repeated, that is, a fixed amount (40 ppm) of acetic acid gas was added every hour, and the gas concentration in the Tedlar bag after 60 minutes was measured by a gas chromatography method.

(3) Evaluation of antibacterial performance A bacterial solution of a test bacterium was dropped on a test piece, and under light irradiation (30 W × 2)
After culturing at 35 ° C. for 18 hours under a fluorescent lamp (30 cm), the number of viable cells was measured. A standard nylon cloth was used as a control cloth.

Example 1 A deodorant [Cu (II) -Ti (IV) -S] was prepared by the following method.
iO ₂ —TiO ₂ ] (I) was adjusted. Copper sulfate crystals (CuSO ₄ · 5H ₂ O, manufactured by Wako Pure Chemical Industries, Ltd. guaranteed reagent) 43.
9 g was dissolved in 1 liter of distilled water, and a titanium sulfate solution (about 30% by weight, a reagent manufactured by Wako Pure Chemical Industries) was added to the obtained aqueous solution.
0 g was added. This mixture contains 0.175 mol of Cu (II) and 0.075 mol of Ti (IV) ions. The pH of the mixture was about 1. About 110 g of a 15% by weight phosphoric acid solution was added dropwise while stirring the mixture at room temperature, and a white precipitate was formed. The mixed solution in which the precipitate was generated was stirred as it was for 24 hours. A solution containing the precipitate (solution A) and an aqueous solution containing sodium silicate (solution B) 47
While stirring in a separate beaker with 50 g of distilled water.
When the solution was dropped in parallel into a container containing 0 ml, Cu
(II) -Ti (IV) mixtures precipitate pale containing -SiO ₂ was produced. The pH at the time of mixing the solution A and the solution B is always about 7
The drop amounts of the liquid A and the liquid B were adjusted so that Note that B
The solution is sodium silicate (Wako Pure Chemical Reagent) in distilled water.
The mixture was diluted to 0% by weight (containing 0.86 mol of SiO ₂ ) and adjusted by adding 30 ml of a 15% by weight aqueous sodium hydroxide solution.

After the mixture of the solution A and the solution B was further stirred at room temperature for 2 hours, the blue-white mixed precipitate was filtered by suction, sufficiently washed with warm deionized water, and dried at 40 ° C. The dried product is pulverized in a mortar to 120 μm or less, and Cu (II) -T
i (IV) to give a pale powder containing -SiO _2. Titanium oxide powder (Ishihara Sangyo Co., Ltd.)
, MC-90) was mixed and pulverized with a jet mill to prepare a deodorant. Next, the reduced viscosity is 1.80 d.
l / g (concentration in orthochlorophenol 1 g / dl, 3
0 ° C.) to nylon 6 at 5% by weight of the above deodorant,
The mixture was melt-extruded with a twin-screw extruder at 260 ° C. while filtering through a 350 mesh filter to produce pellets. As one polyester component, a primary average particle size of 0.0
Reduced viscosity 0.85 containing 1.0% by weight of 4 μm silica
(Concentration in orthochlorophenol 1 g / dl, 30 ° C)
(Hereinafter abbreviated as PET). Then, using the above nylon 6 and PET,
Each of them was melted individually, and then each polymer liquid was coated with 6 layers of PET and 5 layers of nylon 6 as shown in FIG.
It is supplied to the spinning head that forms a multilayer type composite shape to be a layer, and the diameter of the measuring portion is 0.25 mmφ and the land length is 0.5 m
m and a nozzle hole outlet was spread in a trumpet shape and the outlet diameter was 0.5 mmφ. The melt was spun at a spinning temperature of 285 ° C. from a 24-hole round hole nozzle. A 1.0 m-long side-blowing cooling air blowing device is installed immediately below the spinneret, and the composite fiber spun from the spinneret is immediately introduced into the cooling air blowing device, where the temperature is 25 ° C and the humidity is 65 RH%.
The adjusted cooling air was blown onto the spun fibers at a speed of 0.5 m / sec to cool the fibers to 50 ° C. or less (the temperature of the fibers at the outlet of the cooling air blowing device = 40 ° C.).

The conjugate fiber cooled to below 50 ° C.
A length of 1.0 installed 1.6m below the spinneret
m, tube heater with an inner diameter of 30 mm (inner wall temperature 180
° C) and stretched in a tube heater, apply an oil agent to the fiber coming out of the tube heater by a guide oiling method, and subsequently take up 4300 m / min via a pair (two) of take-off rollers. Winding at a speed produced a stretched 75 denier 24-filament composite fiber. When the spinnability of the conjugate fiber when the above-mentioned spinning and drawing steps were performed, and the strength, elongation, uniformity (Worcester spots: U%), and the number of fluffs of the finally obtained conjugate fiber were evaluated. And Table 1 and Table 2 below.

[0090]

[Table 1]

[Table 2]

A tubular knitted fabric was prepared from the obtained conjugate fiber, and
After performing a 5% alkali weight reduction treatment at 98 ° C. in a g / l sodium hydroxide solution, the cross section of the fiber was observed.
It showed a good resolution of 5%. Further, a tubular knitted fabric was prepared and subjected to relaxation, washing, drying, and presetting to evaluate deodorant performance and antibacterial performance. As shown in Table 2, according to the present invention, the odor component was removed at a high removal rate. Also, the antibacterial performance was excellent.

Examples 2 to 3 In Example 2, the silica content in PET was 5.0% by weight.
In Example 3, the primary average particle diameter of silica in PET was 0.3 μm.
Example 2 was carried out in the same manner as in Example 1 except that PET having a content of 2.5% by weight was used. In each case, the fiberization processability was good, and the splitability of the obtained composite fiber was also good.
Further, the deodorizing performance and the antibacterial performance were also at excellent levels.

Examples 4 to 7 In Examples 4 and 5, the reduced viscosity of PET was 0.75, respectively.
Example 1 was set to 0.90, and Examples 6 and 7 were the same as Example 1 except that the reduced viscosity of nylon 6 was 1.60 and 1.90, respectively.
Was performed in the same manner as described above. In each case, the fiberization processability was good, and the splitability of the obtained composite fiber was also good. Further, the deodorizing performance and the antibacterial performance were also at excellent levels.

Example 8 Deodorant [Zn (II) -Ti (IV) -TiO ₂ ] (II)
Was adjusted by the following method. First, 60 g of a titanium sulfate solution (30% by weight, a reagent manufactured by Wako Pure Chemical Industries, Ltd.) was added to 1 liter of distilled water. This mixed solution contains 0.075 mol of Ti (IV) ions. Approximately 98 g of a 15% by weight phosphoric acid solution was added dropwise to this mixed solution at room temperature with stirring, whereby a white precipitate was formed. Stirring was continued for 2 hours with a precipitate formed. To the solution containing this white precipitate, 50.3 g of zinc sulfate crystals (ZnSO ₄ .7H ₂ O, special grade reagent manufactured by Wako Pure Chemical Industries, Ltd.) was added and dissolved. This solution contains 0.175 mol of Zn (II) ions. While stirring the solution at room temperature, a 15% sodium hydroxide solution was added dropwise until the pH reached 7. In addition, when dropping the pH of the sodium hydroxide solution, the pH was kept at about 7 by further dropping the sodium hydroxide solution. When stirring was continued until no decrease in pH was observed, a white mixed precipitate containing Zn (II) -Ti (IV) was formed.

When 37 g of titanium tetrachloride (special grade reagent, manufactured by Wako Pure Chemical Industries, Ltd.) was added dropwise to this solution, and a 15% by weight sodium hydroxide solution was added dropwise until the pH reached 7, a precipitate of titanium oxide was formed. The precipitate formed is filtered off with suction, washed thoroughly with warm deionized water and dried at 110 ° C.
The dried product is pulverized to 120 μm or less in a mortar and finely pulverized by a jet mill to obtain Zn (II) -Ti (I
To give a white deodorant powder containing V) -TiO _2. The following was performed in the same manner as in Example 1. The fiberization processability was good, and the splitability of the obtained conjugate fiber was also good. Further, the deodorizing performance and the antibacterial performance were also at excellent levels.

Example 9 Deodorant [Zn (II) -Ti (IV) -TiO ₂ ] (II
I) was adjusted by the following method. First, distilled water 180
6.64 titanyl sulphate powder (containing 32.5% by weight as TiO ₂ , Taisalt manufactured by Fuji Titanium Co., Ltd.)
g, was added crystals of zinc sulfate (ZnSO ₄ · 7H ₂ O, manufactured by Wako Pure Chemical Industries, Ltd. guaranteed reagent) and 18.1 g. This mixed solution contains 0.027 mol of Ti (IV) ions and 0.062 mol of Zn (II) ions. About 35.3 g of a 15% by weight phosphoric acid solution was added to this mixed solution at room temperature with stirring.
Was added dropwise to form a white precipitate. Stirring was continued overnight with the precipitate formed. While stirring the solution at room temperature, a 15% sodium hydroxide solution was added dropwise until the pH reached 7. When the pH was lowered during the dropping of the sodium hydroxide solution, the pH was maintained at about 7 by further dropping a sodium hydroxide solution. If the stirring is continued until the decrease in pH is no longer observed, Zn
A white mixed precipitate containing (II) -Ti (IV) was formed.

The precipitate formed is filtered off with suction, sufficiently washed with warm deionized water, dried at 120 ° C., and the dried product is ground to 120 μm or less in a mortar and contains Zn (II) -Ti (IV). A white deodorant powder was obtained.

30 parts by weight of titanium oxide powder (MC-90, manufactured by Ishihara Sangyo Co., Ltd.) was mixed with 70 parts by weight of the white powder, and the resulting mixture was finely pulverized with a jet mill to obtain Zn.
To obtain a deodorant containing (II) -Ti (IV) -TiO 2. The following was performed in the same manner as in Example 1. The fiberization processability was good, and the splitability of the obtained conjugate fiber was also good. Further, the deodorizing performance and the antibacterial performance were also at excellent levels.

Examples 10 to 12 Example 10 was performed in the same manner as Example 1 except that the composite cross-sectional shape was the shape shown in FIG. 6, and Example 11 was changed to the composite cross-sectional shape shown in FIG. Example 12 was performed in the same manner as Example 1 except that the composite ratio of PET and nylon 6 was 3/1. In each case, the fiberization processability was good, and the splitability of the obtained composite fiber was also good. Further, the deodorizing performance and the antibacterial performance were also at excellent levels.

Examples 13 to 16 In Examples 13 and 14, the winding speed was 3800 m /
And 4800 m / min, and Examples 15 and 16 were carried out in the same manner as Example 1 except that the tube heater atmosphere temperature was 200 ° C. and 160 ° C., respectively. In each case, the fiberization processability was good, and the yarn properties and splitting properties of the obtained conjugate fiber were satisfactory. Further, the deodorizing performance and the antibacterial performance were also at excellent levels.

Examples 17 and 18 In Example 17, titanium oxide having a primary average particle diameter of 0.4 μm was used in place of the silica used in Example 1, and the titanium oxide content in PET was 0.5% by weight. Example 18
Uses barium sulfate having a primary average particle diameter of 0.6 μm instead of silica, and adjusts the barium sulfate content of PET to 1.0.
It carried out similarly to Example 1 except having changed into weight%.
In each case, the fiberization processability was good, and the yarn properties and splitting properties of the obtained conjugate fiber were satisfactory. Further, the deodorizing performance and the antibacterial performance were also at excellent levels.

Comparative Example 1 A multifilament was prepared in the same manner as in Example 1 except that no deodorant was used, and a tubular knitted fabric was prepared from the filament to evaluate each performance. The fiberization processability and the splitability of the obtained composite fiber were good, but there was no deodorant performance or antibacterial performance.

Comparative Example 2 Titanium oxide powder (MC-9, manufactured by Ishihara Sangyo Co., Ltd.) as a deodorant
0) A composite fiber was prepared in the same manner as in Example 1 except that a master batch pellet containing 20% by weight of (IV) was used, and a tubular knitted fabric was prepared using the composite fiber. Table 2 shows the performance evaluation results of the tubular knitted fabric. Compared with the deodorant used in the present invention, the deodorant effect on hydrogen sulfide was extremely low.

Comparative Example 3 In Example 1, a coprecipitated substance (V) containing titanium phosphate and zinc hydroxide as deodorants in a ratio of Ti ion: Zn ion = 0.3: 0.7 (molar ratio) was used. ), Except that a masterbatch pellet containing 20% by weight was used to prepare a composite fiber, and a tubular knitted fabric was prepared using the composite fiber. Table 2 shows the performance evaluation results of the tubular knitted fabric. Compared with the deodorant used in the present invention, the deodorant effect on acetaldehyde is particularly low.

Comparative Example 4 A conjugate fiber was produced in the same manner as in Example 1 except that PET containing no inorganic fine particles was used, and the spinnability at that time and the conjugate fiber finally obtained were prepared. The strength, elongation, uniformity (Worcester spots: U%), and the number of fluffs generated were measured or evaluated by the methods described above. The fiberization process was poor, and the splitability of the obtained composite fiber was also at an unsatisfactory level.

Comparative Examples 5 to 8 Comparative Example 5 used PET containing 0.1% by weight of silica having a primary average particle diameter of 0.04 μm. Comparative Example 6 used 10% by weight of silica having a primary average particle diameter of 0.04 μm. % P
Using ET, Comparative Examples 7 and 8 contained 0.02% by weight and 15% by weight of titanium oxide having a primary average particle diameter of 0.4 μm, respectively.
It carried out similarly to Example 1 except having used the contained PET. Comparative Examples 5 and 7 were unsatisfactory because the splitting properties of the obtained composite fibers were lower than those in Example 1. Comparative Examples 6 and 8 all had poor fiberization processability.

Comparative Examples 9 to 12 In Comparative Examples 9 and 10, the reduced viscosity of PET was 0.1.
Comparative examples 11 and 12 were carried out in the same manner as in Example 1 except that nylon 6 had a reduced viscosity of 1.4 and 2.2, respectively. In all cases, the fiberization processability was insufficient, and the splitability of the obtained composite fiber was also at an unsatisfactory level.

Comparative Examples 13 and 14 Comparative Example 13 was carried out in the same manner as in Example 1 except that the winding speed was 3200 m / min. Although the fiberization processability was good, the splitting property of the obtained composite fiber was at an unsatisfactory level. Comparative Example 14 was performed in the same manner as in Example 1 except that the tube heater atmosphere temperature was set to 90 ° C. The fibrosis processability was poor, and the splitability of the obtained conjugate fiber was also poor. Moreover, since the yarn strength is low and the elongation is long,
Problems that were difficult to handle in the post-processing step also occurred.

[0109]

Industrial Applicability The present invention is a high-quality polyester and polyamide having excellent deodorizing performance and antibacterial performance, free from fluff and uneven thickness, and excellent in mechanical properties such as strength and elongation. The present invention relates to a method of producing a splittable conjugate fiber by the direct spinning and drawing method with good processability without causing yarn breakage and with good productivity. Moreover, the obtained splittable conjugate fiber has a characteristic that it can be split easily by a chemical or physical treatment in a post-processing step.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a side-by-side type conjugate fiber.

FIG. 2 is a cross-sectional view of a side-by-side repeating type conjugate fiber.

FIG. 3 is a cross-sectional view of a conjugate fiber composed of a component having a radial shape and other components that complement the radiating portion.

FIG. 4 is a cross-sectional view of a conjugate fiber composed of a component having a radial shape and other components that complement the radiating portion.

FIG. 5 is a cross-sectional view of a conjugate fiber composed of a component having a radial shape and another component that complements the radiation portion.

FIG. 6 is a cross-sectional view of a conjugate fiber composed of a component having a radial shape and another component that complements the radiation portion.

FIG. 7 shows a component having a radial shape and a component having a V-shaped recess that complements the radiating portion and has a V-shaped recess facing the center, and a V-shaped shape that complements the recess. It is a cross-sectional view of the composite fiber which consists of the same component as the component having the radial shape.

FIG. 8 is a cross-sectional view of a side-by-side repeating type conjugate fiber having a hollow portion.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-8-284011 (JP, A) JP-A-9-176949 (JP, A) JP-A-10-166863 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) D01F 8/12-8/14

Claims (6)

(57) [Claims] 1. A cross section comprising a polyamide component containing a deodorant and a polyester component containing inorganic fine particles, wherein one component is not completely surrounded by the other component and both components are joined. A splittable conjugate fiber, wherein the primary average particle diameter (μm) of the inorganic fine particles contained in the polyester component and the content (% by weight) of the inorganic fine particles satisfy the following formulas (1) to (3); Reduced viscosity (η
_sp / C) is 0.65 to 1.0, and the reduced viscosity (η
_sp / C) is 1.6 to 2.2. 0.01 ≦ primary average particle diameter (μm) ≦ 5.0 (1) 0.05 ≦ content of inorganic fine particles (% by weight) ≦ 10.0 (2) 0.01 ≦ X ≦ 3.0 (3) where X = primary average particle diameter (μm) × inorganic Fine particle content (% by weight) 2. The deodorant splittable conjugate fiber according to claim 1, wherein the deodorant comprises a phosphate of a tetravalent metal, a hydroxide of a divalent metal, and a photocatalyst. 3. The method according to claim 1, wherein the degree of division is 80% or more.
2. The deodorant splittable conjugate fiber according to 1. 4. A deodorant-containing polyamide microfine fiber and an inorganic fine particle obtained by subjecting the splittable conjugate fiber according to claim 1 to a chemical and / or physical splitting treatment. Fiber aggregate with polyester ultrafine fibers. 5. A reduced viscosity containing inorganic fine particles (η _sp /
C) A polyester component having a primary average particle diameter (μm) of the inorganic fine particles and a content (% by weight) of the inorganic fine particles in the polyester which satisfies the following formulas (1) to (3): A composite form in which a polyamide component containing an inorganic deodorant and having a reduced viscosity (η _sp / C) of 1.6 to 2.2 is bonded to both components without completely surrounding one component with the other component After the melt spinning from the spinneret, the spun product is once cooled to a temperature below the glass transition temperature, and subsequently run in a heating zone heated to an ambient temperature of 100 ° C. or higher, and taken off at a speed of 3500 m / min or more. A method for producing a deodorant splittable composite fiber. 0.01 ≦ primary average particle diameter (μm) ≦ 5.0 (1) 0.05 ≦ content of inorganic fine particles (% by weight) ≦ 10.0 (2) 0.01 ≦ X ≦ 3.0 (3) where X = primary average particle diameter (μm) × inorganic Fine particle content (% by weight) 6. The method according to claim 5, wherein the deodorant comprises a phosphate of a tetravalent metal, a hydroxide of a divalent metal, and a photocatalyst.