JP2000336560A - Woven and knitted fabric having excellent hygroscopic and moisture release property - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain woven and knitted fabrics having excellent hygroscopic and moisture release properties and excellent whiteness by weaving and knitting a sheath-core conjugate yarn arranging a hygroscopic and moisture release component composed of a fiber-forming polymer and a specific polyalkylene oxide-modified substance in a core part. SOLUTION: A core component comprising a fiber-forming polymer such as nylon 6, etc., a hygroscopic and moisture release component composed of a polyoxyalkylene oxide-modified substance obtained by reacting a polyalkylene oxide with a polyol and a fatty acid diisocyanate and at least one stabilizer selected from the group of a hindered amine-based stabilizer, for example, shown by formula I and a phosphite- based stabilizer, for example, shown by formula II and the fiber-forming polymer as a sheath component are subjected to a conjugate spinning to give a hygroscopic and moisture release yarn having >=1% moisture absorption when equilibrated at 25 deg.C×60% RH and then allowed to stand 34×90% RH for 30 minutes and >=2% moisture release ratio when equilibrated at 34 deg.C×90% RH and then allowed to stand at 25 deg.C×60% RH for 30 minutes and >=80% Taube whiteness. The objective hygroscopic and moisture release woven and knitted fabrics are obtained by using the hygroscopic and moisture release yarn.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a woven or knitted fabric having excellent moisture absorption / release properties and good whiteness.

[0002]

2. Description of the Related Art Synthetic fibers, especially polyester fibers, are superior to natural fibers such as cotton, hemp, wool, and silk in terms of strength, abrasion resistance, dimensional stability, wash and wear, and quick drying. A woven or knitted fabric using the same is widely used as a material for clothing. However, synthetic fibers generally do not have the excellent hygroscopicity of natural fibers, and clothing made of woven or knitted fabrics using the same may cause stuffiness, stickiness, etc. due to sweating when worn, and are more comfortable than natural fibers. Poor in sex.

For this reason, various attempts have been made to impart hygroscopicity or water absorbency to synthetic fibers. For example, using a polyetheresteramide as a moisture absorbing component, ΔMR
Having a value of 2.5% or more or 1.5% or more are disclosed in JP-A-9-41204 and JP-A-9-41.
No. 221, for example. ΔMR is 30
The difference between the moisture content when left for 24 hours in an atmosphere of 90 ° C. and 90% RH and the moisture content when left for 24 hours in an atmosphere of 20 ° C. and 65% RH is defined as a moisture absorption / release coefficient. It is. However, ΔMR is a value calculated from each moisture content when left for 24 hours under different temperature / humidity conditions. From the viewpoint of practicality, when the temperature / humidity condition changes, moisture absorption or desorption is quickly performed. It is important that this is not suggested.

[0004] Also, Japanese Patent Application Laid-Open No. Sho 63-227871,
Japanese Unexamined Patent Publication (Kokai) No. 63-227872 proposes a comfortable garment material having moisture absorption / release properties.
Moisture absorption 15 minutes after moving from RH to 30 ° C. × 90% RH and 20 ° C. × 65% from 30 ° C. × 90% RH
The moisture release rate 15 minutes after the transfer to the RH is described. However, these are those in which a moisture-absorbing component such as vinyl carboxylic acid is adhered to the surface of a woven or knitted fabric made of polyester fiber or polyamide fiber by graft polymerization. There are problems such as easy occurrence and a marked decrease in color fastness.

[0005] In addition, thermoplastic polymers which generally have excellent hygroscopicity and water absorbency and are thermoplastic or are often colored over time, thereby deteriorating the quality and grade of textile products. There was a problem. For example, JP-A-8-209450 and JP-A-8-31719
Japanese Patent Application Publication No. JP-A-2005-133125 discloses a conjugate fiber having excellent moisture absorption / release properties. These use modified polyethylene oxide as a moisture absorbing / releasing component, and are excellent in moisture absorbing / releasing properties. However, although there is a description that a diisocyanate compound is used as a modifier of the modified polyethylene oxide, there is no suggestion that the aliphatic diisocyanate compound can significantly suppress the color tone change of the composite fiber, and the polyethylene described in Examples and the like is not suggested. The oxide-modified product “trade name: Aqua Coke” is a product modified with an aromatic diisocyanate compound, and has a problem that the color tone of the fiber changes with time.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and exhibits a moisture absorbing function and a moisture releasing function depending on the temperature and humidity conditions of the environment, and the temperature and humidity conditions change. It is an object of the present invention to provide a woven or knitted fabric having excellent moisture absorption / desorption properties which can exhibit moisture absorption / desorption properties repeatedly and which has not only a small decrease in whiteness, but also excellent texture and dyeing properties. It is a technical issue.

[0007]

The present invention solves the above-mentioned problems, and the present invention relates to a group consisting of a moisture-absorbing / desorbing component, a fiber-forming polymer, a hindered amine-based stabilizer, and a phosphite-based stabilizer. A synthetic fiber comprising at least one stabilizer selected from the group consisting of 25 ° C. × 60% R
The synthetic fiber which reached the equilibrium moisture content under the H environment was 34 ° C ×
The synthetic fiber having a moisture absorption of 1.5% or more when left to stand in a 90% RH environment for 30 minutes and reaching an equilibrium moisture content in a 34 ° C. × 90% RH environment for 30 minutes in a 25 ° C. × 60% environment. Characterized in that the synthetic fiber has a moisture release property of 2% or more and the synthetic fiber has a Taube whiteness of 80 or more. Woven and knitted fabric with excellent moisture. The woven or knitted fabric excellent in moisture absorption and desorption according to claim 1, wherein the moisture absorption and desorption component is a modified polyalkylene oxide obtained by reacting a polyalkylene oxide with a polyol and an aliphatic diisocyanate compound. 3. The woven / knitted fabric excellent in moisture absorption / desorption according to claim 1 or 2, wherein the moisture-releasing synthetic fiber is a core-sheath type composite fiber containing a moisture-absorbing / desorbing component in a core portion. 4. The woven or knitted fabric according to claim 1, 2 or 3, which is a compound represented by the formula:
4. The woven or knitted fabric according to claim 1, 2 or 3, wherein the phosphite-based stabilizer is a compound represented by the formula (2), and "The equilibrium moisture regain under an environment of 25 ° C. × 60% RH. The obtained woven or knitted fabric has a hygroscopicity of 1% or more when left in an environment of 34 ° C. × 90% RH for 30 minutes.
The woven or knitted fabric that has reached the equilibrium moisture content under H environment is 25 ° C x 60%
The moisture absorption / desorption property according to claim 1, 2, 3, 4, or 5, wherein the moisture absorption property when left in an environment for 30 minutes is 1.5% or more, and the Taube whiteness of the woven or knitted fabric is 80 or more. Excellent woven and knitted fabric. ”.

[0008]

Embedded image

[0009]

Embedded image

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. Hygroscopic synthetic fibers used for the woven or knitted fabric of the present invention,
The fiber is composed of a moisture absorbing / releasing component, a fiber-forming polymer, a hindered amine stabilizer, and at least one stabilizer selected from the group consisting of phosphite stabilizers. When the synthetic fiber reaches an equilibrium moisture content in a 25 ° C. × 60% RH environment, the synthetic fiber has a hygroscopicity of 1.5% or more when left to stand in a 34 ° C. × 90% RH environment for 30 minutes.
The synthetic fiber, which has reached the equilibrium moisture content in a 4 ° C. × 90% RH environment, has a moisture absorption / desorption property of 2% or more when left in a 25 ° C. × 60% RH environment for 30 minutes. There is a need. Here, the temperature / humidity condition of 34 ° C. × 90% RH roughly corresponds to the temperature / humidity state between the human body and the clothes when a person wears clothes from early summer to midsummer.
The temperature / humidity condition of ° C × 60% RH is based on an average temperature / humidity state and an indoor environment throughout the year.

Therefore, the synthetic fiber which has reached the equilibrium moisture content in a 25 ° C. × 60% RH environment has a hygroscopicity of 1.5% or more, preferably 2%, when left in a 34 ° C. × 90% RH environment for 30 minutes. When the content is 0.5% or more, the woven or knitted fabric described later can quickly absorb moisture of sweat discharged from the human body. In addition, the synthetic fiber which has reached the equilibrium moisture content in an environment of 34 ° C. × 90% RH has a moisture release of 2% or more, preferably 3% or more when left for 30 minutes in an environment of 25 ° C. × 60% RH. As a result, the woven or knitted fabric described later can quickly release the moisture inside the fiber once absorbed into the space outside the clothing having a lower temperature and humidity than the space inside the clothing.

In practice, the synthetic fiber absorbs the sweat of the water vapor discharged from the human body and simultaneously releases the sweat to the outside of the clothes. Therefore, it is difficult to measure the hygroscopicity and the hygroscopicity separately. The index was used in the definition of hygroscopicity and moisture release described above. As described above, the hygroscopic synthetic fiber of the present invention has a hygroscopic property of 1.5% or more and a hygroscopic property of 2% or more, and the hygroscopic property is equal to or higher than the hygroscopic property. preferable.

The above-mentioned moisture absorption / desorption performance is provided by the moisture absorption / desorption component used in the moisture absorption / desorption synthetic fiber of the present invention, and the moisture absorption / desorption component satisfies the aforementioned moisture absorption / desorption performance. What is necessary is just a thing with little color tone change. Preferably, it is a modified polyalkylene oxide obtained by reacting a polyalkylene oxide with a polyol and an aliphatic diisocyanate compound. In particular, a modified product obtained by the reaction of one or more compounds selected from the following groups is also preferable from the viewpoint that melt spinning can be performed simultaneously with the fiber-forming polymer.

Polyalkylene oxides include polyethylene oxide and polypropylene oxide, and copolymers of both. Polyols such as glycols such as ethylene glycol, diethylene glycol and propylene glycol, and aliphatic diisocyanates include alicyclic diisocyanates. , Dicyclohexylmethane-4,4'-diisocyanate, 1,6-hexamethylene diisocyanate, and the like. Here, it is not preferable to use a diisocyanate containing an aromatic component because coloring during spinning or yellowing of the obtained fiber with time is observed.

Examples of the fiber-forming polymer used in the present invention include polyamides such as nylon 6, nylon 66 and nylon 46, polyethylene terephthalate, and the like.
Examples include polyesters such as polytrimethylene terephthalate and polybutylene terephthalate, polyolefins such as polyethylene and polypropylene, and copolymers thereof, but are not limited thereto. Additives such as matting agents, ultraviolet absorbers, pigments, and light stabilizers may be added to the fiber-forming polymer.

The stabilizer used in the present invention is at least one selected from the group consisting of hindered amine stabilizers and phosphite stabilizers. Specific examples of the above hindered amine-based stabilizer include (2,2,6,6 tetramethylpiperidinyl 4) sebacate, dimethyl-1- (2-hydroxyethyl) -4-hydroxy-2,2,6,6 succinate. -Polycondensate of tetramethylpiperidine, poly [{6- (1,1,3,3-tetramethylbutyl) amino-1,3,5-triazine-2,4-diyl}
｛(2,2,6,6-tetramethyl-4-piperidyl)
Imino {hexamethylene} (2,2,6,6-tetramethyl-4-piperidyl) imino}, N, N-bis (3-
Aminopropyl) ethylenediamine 2,4-bis [N
-Butyl-N- (1,2,2,6,6-pentamethyl-4-piperidyl) amino] -6-chloro-1,3,5-
Triazine condensate, 1- [2- {3- (3,5-di-t)
-Butyl-4-hydroxyphenyl) propionyloxy {ethyl] -4- {3- (3,5-di5-di-t-
(Butyl-4-hydroxyphenyl) propionyloxy} -2,2,6,6-tetramethylpiperidine. In particular, from the viewpoint of preventing thermal deterioration of the moisture-absorbing / desorbing component used in the present invention and preventing coloring due to heat or ultraviolet rays, 1- [2- ｛represented by Chemical Formula 1 combining a light stable component and a heat stable component. 3- (3,5-Gee t-
Butyl-4-hydroxyphenyl) propionyloxy {ethyl] -4- {3- (3,5-di5-di-t-
Butyl-4-hydroxyphenyl) propionyloxy {-2,2,6,6-tetramethylpiperidine is preferably used.

Specific examples of the phosphite-based stabilizer include:
Distearylpentaerythritol diphosphite, tris (2,4-di-tert-butylphenyl) phosphite, tris (2,4-di-tert-butylphenyl) phosphite, tetrakis (4,4′-biphenylenediphosphinate) 4-di-tert-butylphenyl), cyclic neopentanetetraylbis (2,4-di-tert-butyl)
Butylphenyl) phosphite, cyclic neopentanetetraylbis (2,6-di-tert-butyl-4-methylphenyl) phosphite, and the like.
In particular, from the viewpoint of preventing thermal deterioration of the moisture-absorbing and desorbing components used in the present invention and preventing coloring due to heat and ultraviolet rays, cyclic neopentanetetrayl represented by Chemical Formula 2 in which a light-stable component and a heat-stable component are combined. Bis (2,4-di-tert-butylphenyl) phosphite is preferably used. The above stabilizers may be used alone or in combination.

The synthetic fiber of the present invention comprises a moisture-absorbing / desorbing component, a fiber-forming polymer, and a stabilizer. Alternatively, various conjugate fibers such as a fiber which is non-uniformly blended, a core-sheath type, a side-by-side type, a sea-island type where both are present independently, and a multi-segment type in which one component is divided into a plurality by the other component, A blend of the wet component and the fiber-forming polymer is used as one component, and a conjugate fiber of the blend with the fiber-forming polymer is exemplified.

The moisture-absorbing / desorbing component may be disposed on either the inner layer and / or the outer layer of the fiber. However, when used for clothing, the moisture-absorbing / desorbing component is not exposed on the fiber surface.
It is particularly preferable to dispose it on the inner layer (core portion) since there is no occurrence of a feeling of wetting or dyeing unevenness at the time of moisture absorption and the color fastness does not decrease.

The composition ratio of the moisture-absorbing / desorbing component and the fiber-forming polymer in the present invention may be set so as to simultaneously satisfy the above-mentioned moisture-absorbing properties and moisture-releasing properties, and may be determined according to the purpose and application. . For example, when using the above-mentioned modified polyalkylene oxide as a moisture absorbing and releasing component,
A range of about 3 to 50% by weight based on fiber weight is preferred.
The content of the stabilizer is 0.05 to 5.0% by weight, and preferably 0.1 to 2.5% by weight, based on the moisture absorbing and releasing component. If the content of the stabilizer exceeds 5.0% by weight, it is not preferable because it becomes difficult to extrude from the extruder at the time of spinning, and the cost becomes disadvantageous. On the other hand, if the content of the stabilizer is less than 0.05% by weight, the obtained fibers may be colored, and the whiteness, which is the object of the present invention, cannot be obtained, which is not preferable.

The single-filament fineness of the moisture-absorbing / releasing synthetic fiber is generally preferably in the range of 0.1 to 20 denier, but is not particularly limited, and may have any cross-sectional shape. . Furthermore, the hygroscopic synthetic fiber of the present invention is preferably used as a multifilament long fiber from the viewpoint of cost, but it is also possible to shorten the fiber and use it as a spun yarn.

The woven or knitted fabric of the present invention uses at least a part of the above-mentioned hygroscopic synthetic fiber, and may use 100% of the above hygroscopic synthetic fiber.
It may be a knitted or interwoven fabric with another fiber such as a polyester fiber, or a woven or knitted fabric using a mixed fiber consisting of a hygroscopic synthetic fiber and another fiber. Here, the mixing ratio when other fibers are used is not particularly limited in the present invention as long as the following conditions are satisfied.

The woven or knitted fabric of the present invention is obtained by converting the woven or knitted fabric which has reached the equilibrium moisture content in an environment of 25 ° C. × 60% RH at 34 ° C. × 90%.
When the woven or knitted fabric which has a moisture absorption of 1% or more when left to stand in an RH environment for 30 minutes and reaches an equilibrium moisture content in a 34 ° C × 90% RH environment is left to stand in a 25 ° C × 60% RH environment for 30 minutes Must have a moisture absorption / desorption property of 1.5% or more. When the woven or knitted fabric which has reached the equilibrium moisture content in a 25 ° C. × 60% RH environment is left in a 34 ° C. × 90% RH environment for 30 minutes, the hygroscopicity is 1% or more, preferably 2% or more. The woven or knitted fabric constituting the clothes can quickly absorb the water vapor of the sweat discharged from the human body. The woven or knitted fabric which has reached the equilibrium moisture content in an environment of 34 ° C. × 90% RH has a moisture release of 1.5% or more, preferably 2.5% when left for 30 minutes in an environment of 25 ° C. × 60% RH. As described above, once the woven or knitted fabric has absorbed moisture, the moisture inside the fiber can be quickly released to the space outside the clothing where the temperature and humidity are lower than the space inside the clothing.

As described above, the woven or knitted fabric of the present invention must have a moisture absorption of 1% or more and a moisture release of 1.5% or more. preferable. That is, if the moisture release property is lower than the moisture absorption property, the sweat of the water vapor from the human body gradually accumulates in the woven or knitted fabric with the passage of time, and the moisture absorption performance may decrease. In addition, hygroscopicity is 1
% Or less than 1.5%, the amount of moisture absorption or moisture release itself is small, so that the clothes easily become stuffy, which is not preferable.

[0025]

Next, the present invention will be described more specifically with reference to examples. The measurement and evaluation of the performance in the examples were performed by the following methods. (1) Melt viscosity of modified polyalkylene oxide
g using a flow tester (CFT-50 manufactured by Shimadzu Corporation)
0D), a load of 50 kg / cm ² and a temperature of 170
C., a die diameter of 1 mm, and a die length of 1 mm. (2) Water absorption capacity of modified polyalkylene oxide (g /
g) 1 g of the weighed modified polyalkylene oxide was added to 200 ml of pure water, and the mixture was stirred for 24 hours, filtered through a 200-mesh wire gauze, and the weight of the gel after filtration was measured for water absorption capacity [g (pure water) / g (resin)]. (3) Hygroscopicity and Moisture Release A sample of a tubular knitted fabric and a woven or knitted fabric made of a hygroscopic synthetic fiber is dried at 105 ° C. for 2 hours and the weight W ₀ is measured. B) After that, the sample is left standing for 24 hours under the condition of 25 ° C. × 60% RH to measure the sample weight W ₁ . Next, this sample was
℃ 90% RH, sample weight W after 30 minutes
Measure ₂ . B) After measuring W ₂ , the sample is further left under the same conditions for 24 hours, and the sample weight W ₃ is measured. Next, 25 ° C x 60%
Transferred under the conditions of RH, to measure the sample weight W ₄ after 30 minutes. C) W ₄ After the measurement, it performs normal washing with a commercial detergent and household washing machine, is dried by sun outdoors. The above operations (a), (b), and (c) are performed once and repeatedly performed five times.
The n-th hygroscopicity and the moisture release were determined by the following formulas. Hygroscopicity n (%) = [(W ₂ −W ₁ ) / W ₀ ] × 100 Hygroscopicity n (%) = [(W ₃ −W ₄ ) / W ₀ ] × 100 (4) Taube whiteness tube After ordinary scouring of the ground or woven or knitted fabric, using a Macbeth Color-Eye3100 color difference meter, the Taube whiteness was determined from the Y and Z values measured with a visual field of 2 degrees and a C light source using the following equation. W) was calculated. Taube whiteness (W) = 3.74Z-3Y (5) Dye fastness A sample of a tubular knitted fabric is subjected to ordinary scouring, heat setting, and dyeing (in the case of nylon: dye; Nylosan Blue FL 2% owf, 100)
30 ° C x 30 minutes, for polyester: Dye; Dianix Blue
UN-SE 2% owf, 130 ° C. × 30 minutes), reduction washing and final setting were performed, and the following color fastness was evaluated. Light fastness JIS L-0842 Washing fastness JIS L-0844 Sweat fastness JIS L-0848 Friction fastness JIS L-0849 Those having a slightly slimy feeling were evaluated as △, and those having a slimy feeling difficult to use for clothing were evaluated as ×.

Examples 1-4 and Comparative Examples 1-5 Polyethylene oxide, 1,4-
Butanediol and dicyclohexylmethane-4,4
Modified polyethylene oxaside which is a reaction product of '-diisocyanate (water absorption capacity 35 g / g, melt viscosity 4000
Poise) and 1- [2- {3- (3,
5-Di-tert-butyl-4-hydroxyphenyl) propionyloxy {ethyl] -4- {3- (3,5-di-5
-Di-tert-butyl-4-hydroxyphenyl) propionyloxy {-2,2,6,6-tetramethylpiperidine (hereinafter, SANOL LS2626 manufactured by Sankyo) or cyclic neopentanetetraylbis (2,6-di-t-) Butyl-4-methylphenyl) phosphite (hereinafter, PEP 36 manufactured by Asahi Denka Kogyo KK), nylon 6 as a fiber-forming polymer
Alternatively, using polyethylene terephthalate, the used polymer of the core component, the blend ratio, the amount of the stabilizer added, the polymer of the sheath component, and the core / sheath ratio were changed as shown in Table 1 to obtain four kinds for the examples and five kinds for the comparative examples. Kind of core-sheath type synthetic fiber 40d / 24f
Was obtained. Using the obtained synthetic fibers, a knitted fabric (knitting machine: LIL-8 manufactured by Fukuhara Seiki Co., Ltd., kamakei: 33 inches, gauge number: 40G) is knitted with a knitting structure of mock Rodia,
Normal scouring, presetting, staining (Uvitex EBF 1% owf),
The final setting was carried out to obtain four kinds of knitted articles of the present invention having excellent moisture absorption and desorption properties and four kinds of knitted articles of comparative examples. Table 1 also shows the evaluation results of the obtained synthetic fibers and knitted materials of Examples 1 to 4 and Comparative Examples 1 to 5.

[0027]

[Table 1]

As apparent from Table 1, Examples 1 to 4
Were excellent in hygroscopicity and moisture release, and good in whiteness. On the other hand, Comparative Examples 1 and 2 containing no moisture absorbing / releasing component
In No. 2, sufficient moisture absorption / release performance was not obtained. Comparative Examples 3 and 4 in which the stabilizer was not added or in which the amount of the stabilizer was small were excellent in hygroscopicity and moisture release, but were insufficient in whiteness. In Comparative Example 5, since the amount of the stabilizer was large, the extruder did not bite well during spinning, and no yarn was obtained.

[0029]

According to the present invention, excellent moisture absorption / desorption performance can be exhibited, which exhibits a moisture absorption function and a moisture release function depending on the temperature and humidity conditions of the environment and can repeatedly exhibit moisture absorption / desorption properties even when the temperature and humidity conditions change. Not only has very little color change, especially yellowing,
A woven or knitted fabric having excellent moisture absorption and desorption properties which does not have a problem in feel and color fastness even when used for clothing can be provided.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) D03D 15/00 D03D 15/00 E D04B 21/00 D04B 21/00 B F term (Reference) 4L002 AA06 AA07 AB02 AB05 AC00 BB01 DA04 EA00 FA01 4L035 EE05 EE20 FF10 JJ11 JJ19 JJ25 KK05 4L041 BA02 BA05 BA21 BC02 BD20 CA06 CA21 CA35 CB15 CB19 CB28 DD01 DD14 DD18 DD21 4L048 AA21 AA24 AA28 AA07 CA15 CA15

Claims (6)

[Claims] 1. A fiber-forming polymer and a moisture-absorbing and releasing component,
What is claimed is: 1. A synthetic fiber comprising at least one stabilizer selected from the group consisting of a hindered amine stabilizer and a phosphite stabilizer, wherein said synthetic fiber has reached an equilibrium moisture content in a 25 ° C. × 60% RH environment. When the fiber has a hygroscopicity of 1.5% or more when left in a 34 ° C. × 90% RH environment for 30 minutes,
The synthetic fiber, which has reached an equilibrium moisture content in an environment of 34 ° C. × 90% RH, has a moisture release of 2% or more when left in an environment of 25 ° C. × 60% for 30 minutes, and has a Taube white of the synthetic fiber. A woven / knitted fabric excellent in moisture absorption / desorption properties, wherein the woven / knitted fabric is constituted by using at least a part of moisture absorption / desorption synthetic fibers having a degree of 80 or more. 2. The woven or knitted fabric according to claim 1, wherein the moisture absorbing / releasing component is a modified polyalkylene oxide obtained by reacting the polyalkylene oxide with a polyol and an aliphatic diisocyanate compound. 3. The woven / knitted fabric excellent in moisture absorption / desorption according to claim 1 or 2, wherein the moisture absorption / desorption synthetic fiber is a core-sheath type composite fiber containing a moisture absorption / desorption component in a core portion. 4. The woven or knitted fabric according to claim 1, wherein the hindered amine stabilizer is a compound represented by Chemical Formula 1. Embedded image 5. The woven / knitted fabric excellent in moisture absorption / release properties according to claim 1, wherein the phosphite-based stabilizer is a compound represented by Chemical formula 2. Embedded image 6. A woven or knitted fabric which has reached an equilibrium moisture content in a 25 ° C. × 60% RH environment has a hygroscopicity of 1% or more and 34 ° C. × 90% when left for 30 minutes in a 34 ° C. × 90% RH environment. RH
When the woven or knitted fabric which has reached the equilibrium moisture content under the environment is left in an environment of 25 ° C. × 60% for 30 minutes, the moisture release property is 1.5% or more, and the Taube whiteness of the woven or knitted fabric is 80 or more. The woven or knitted fabric according to claim 1, 2, 3, 4, or 5, which is excellent in moisture absorption / release properties.