JPH07150414A - Hygroscopic polyamide fiber and inner wear, hosiery and sportswear composed thereof - Google Patents

Abstract

PURPOSE:To obtain polyamide fiber, having excellent characteristics essential to the polyamide fiber and high hygroscopicity at the same time and capable of providing a fabric product for clothes excellent in the hygroscopicity and feeling of wear without mustiness and stickiness. CONSTITUTION:This hygroscopic polyamide fiber contains 1-15wt.% polyvinylpyrrolidone and 0.1-10wt.% polyether ester amide and/or polyether amide. Furthermore, these inner wear, hosiery and sportswear are produced from the hygroscopic polyamide fiber.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hygroscopic polyamide which is preferably used as innerwear such as lingerie and foundation which has a comfortable feeling without stickiness, sportswear which does not get damp even if it sweats, socks and the like. Regarding fibers.

[0002]

2. Description of the Related Art Natural fibers typified by cotton and wool are preferred because of their texture and lack of feeling of unevenness. The main factor of this comfortable wearing feeling is that the natural fiber has an appropriate hygroscopic property. However, natural fibers lack aesthetics such as suppleness, drape, and gloss, and are also insufficient in terms of smooth touch on the surface and coolness when worn. In addition, its wear resistance and strength are insufficient, making it unsuitable for sports applications.

On the other hand, polyamide fiber has strength, suppleness, drape, gloss, color development, dyeing fastness,
It has excellent properties such as abrasion resistance and softness. Therefore, it has been favorably used for textile products for clothing such as innerwear, sportswear, and pantyhose.

Although the equilibrium moisture content (hygroscopicity in a standard state) of polyamide fibers is higher than that of polyester fibers, the hygroscopicity is inferior to that of natural fibers, and the comfortable feeling when worn is still insufficient. Therefore, various attempts have been made to improve the moisture absorption properties of polyamide fibers.

For example, Japanese Patent Application Laid-Open No. 4-136215 discloses a method for improving spinning stability when a hygroscopic polyamide fiber is produced by using nylon 4 having excellent hygroscopicity.

Further, JP-A-56-24426 discloses a method for producing hygroscopic polyamide fibers by improving the hygroscopic properties of polyamide fibers by graft polymerization.

[0007] Further, Japanese Patent Publication No. 55-4852 discloses a method for producing hygroscopic polyamide fibers containing polyvinylpyrrolidone with good spinnability by taking a specific spinning method.

[0008]

[Problems to be Solved by the Invention] However, nylon 4
The hygroscopic fiber using is poor in dimensional stability due to swelling and is not practically satisfactory.

Further, hygroscopic polyamide fibers obtained by graft polymerization have the drawbacks that the dyeability is greatly reduced, deep dyeing cannot be obtained, and the durability upon washing is poor.

Furthermore, in the case of a hygroscopic polyamide fiber containing polyvinylpyrrolidone, it is necessary to add a considerably large amount of polyvinylpyrrolidone in order to obtain a sufficient moisture absorption rate. There is a problem that it gradually precipitates and becomes sticky, and the wearing feeling is poor.

As described above, according to the conventional technique, it is difficult to impart sufficient hygroscopicity to the polyamide fiber without impairing the excellent characteristics originally possessed by the polyamide fiber.

Therefore, the present invention solves the above-mentioned drawbacks of the prior art and is excellent in high strength, abrasion resistance, softness, gloss characteristics, sharpness of dyeing, and dry feeling which polyamide fibers originally have. The main object of the present invention is to provide a polyamide fiber having characteristics and also having high hygroscopicity.

At the same time, it is an object of the present invention to provide polyamide fiber innerwear, socks, and sportswear which are excellent in hygroscopicity and wearability.

[0014]

To achieve this object, the hygroscopic polyamide fiber of the present invention (Claim 1) has a polyvinylpyrrolidone content of 1% by weight or more and 15% by weight or less with respect to the polyamide and a polyamide. It is characterized by containing 0.1 to 10% by weight of a polyether ester amide and / or a polyether amide.

The innerwear, socks, or sportswear of the present invention is characterized by using these hygroscopic polyamide fibers.

The polyamide used in the present invention may be an aliphatic polyamide such as polycapramide, polyhexamethylene adipamide, polyhexamethylene sebacamide, polyundecane amide or a copolymer containing them as a main component. In the case of copolymerized polyamide, the amount of the copolymerized component is 1
It may be a small amount such as 5% or less.

Among them, polycapramide, polyhexamethylene adipamide, or those containing them as a main component (for example, 85%) is particularly preferable because of their excellent properties for clothing use.
The above copolymers are preferable.

If necessary, known modifiers such as a matting agent, a light stabilizer and a heat resister may be added to this polyamide within a range that does not impair the object of the present invention.

The polyamide fiber of the present invention contains a predetermined amount of polyvinylpyrrolidone (hereinafter abbreviated as PVP), and a predetermined amount of polyether ester amide (hereinafter referred to as PEE).
Abbreviated as A) and / or polyether amide (hereinafter PEA)
Abbreviated) is required to be included.

The PVP may be obtained under any production condition, but it has a weight average molecular weight of 10,000 or more 12
From the viewpoint of stable discharge properties from a polyamide polymerization kettle, those of not more than 0,000 are preferable. More preferably, the weight average molecular weight is 30,000 or more and 600,000 or less.

The amount of PVP added is 1% by weight or more and 15% by weight.
It is necessary to be below (to polyamide), and preferably 2% by weight or more and 7% by weight or less.

The amount of PVP added should be at least 1% by weight in order to impart sufficient hygroscopicity to the polyamito fiber. On the other hand, if the amount is too large, the sticky feeling cannot be suppressed even if PEEA and / or PEA are added in combination, and the wearing comfort is poor.

PEEA is a polymer having an amide unit and an ether ester unit, and may be a block copolymer or a random copolymer. Among them, the amide unit is capramide and the ether ester unit has a molecular weight of 50.
It is preferably an ether ester derived from 0 to 5000 polyethylene glycol and a dicarboxylic acid of terephthalic acid, isophthalic acid, sebacic acid and adipic acid. The amide unit / ether ester unit copolymerization ratio is preferably 20/80 to 80/20.

PEA is a polymer having an amide unit and an ether unit, and may be a block copolymer or a random copolymer. Among them, the amide unit is capramide and the ether unit has a molecular weight of 500 to 800.
It is preferably an ether compound mainly composed of polyethylene glycol of 0. The copolymerization ratio of the amide unit / ether unit is preferably 20/80 to 80/20.

The amount of PEEA and / or PEA added is 0.
It is necessary to be 1% by weight or more and 10% by weight or less (against polyamide). When PEEA is added, the addition amount is
It is preferably 0.5% by weight or more and 10% by weight or less, more preferably 1% by weight or more and 8% by weight or less. When PEA is added, the addition amount is preferably 0.1% by weight or more and 8
It is preferably not more than 0.5% by weight, more preferably not less than 0.5% by weight and not more than 5% by weight.

When PEEA and / or PEA are added together, the moisture absorption effect of PVP is enhanced, and moreover, P
The precipitation of VP is suppressed. In order to exert these effects, PEEA and / or the amount of PEA added must be at least 0.1% by weight. On the other hand, if the amount is too large, the spinnability is significantly deteriorated and stable spinning becomes difficult.

PVP content and PEEA and / or PE
The sum of the content of A and A is preferably 2% by weight or more and 15% by weight or less, and more preferably 3% by weight or more and 10% by weight or less.

As described above, when PEEA and / or PEA are added together in a predetermined amount, the problems of the conventional method of adding only PVP to achieve hygroscopicity, that is, the precipitation of PVP during wearing and the sticky feeling of the fiber surface , Can be eliminated. Moreover, since the hygroscopic effect of PVP is enhanced, the hygroscopicity can be improved and the amount of PVP added can be reduced.

Especially when PVP, PEEA and PEA are added together, the hygroscopicity can be further improved.

In the present invention, the method of adding PVP and PEEA and / or PEA to the polyamide is not particularly limited, but a method of adding it as an aqueous solution at the time of polyamide polymerization, a method of kneading into the polyamide using a kneader, A method of blending at the time of spinning may be used.

Obtained PVP and PEEA and / or PE
The polyamide containing A and A are melt-spun into a multifilament by an ordinary method. At this time, a direct spinning and drawing method in which, after spinning, the film is continuously drawn without being wound once,
A high-speed spinning method in which the spinning speed is set to a high speed of 4000 m / min or more and the stretching step is substantially omitted, or a high-speed direct spinning / drawing method combining them is preferably used.

The hygroscopic polyamide fiber obtained by spinning as described above is subjected to post-processing, weaving, knitting, and weaving in a usual method, and sewn into various clothing products. Among them, innerwear (lingerie, foundation, etc.) and socks (stockings, pantyhose, tights, socks, etc.) worn directly on the skin, or sportswear (windbreaker, tennis wear, etc.) worn in a state where they easily sweat. Suitable as ski wear, training wear, etc.).

In order to exert the hygroscopic effect in these clothing products, it is preferable to use the hygroscopic polyamide fiber of the present invention in an amount of 30% by weight or more.

[0034]

EXAMPLES Various characteristic values measured in the following examples were measured by the following measuring methods.

<Maximum moisture absorption rate, standard moisture absorption rate> A 27-gauge tubular knitted fabric is prepared from sample fibers. After the prepared sample knitted fabric is refined to remove the oil agent, about 1 g of the sample knitted fabric is put into a glass weighing bottle (tare weight F) and dried in a dryer at 110 ° C. for 2 hours. After drying, the bottle is sealed and allowed to cool in a desiccator for 30 minutes, and then the total weight (K) of the weighing bottle containing the sample knitted fabric is measured.

Next, it is placed in a constant temperature and humidity chamber set at 20 ° C. and 65% RH in an open state and left for 24 hours. After that, the bag is sealed again and left in a desiccator for 30 minutes, and then the total weight (H) of the weighing bottle containing the sample knitted fabric is measured.

Subsequently, after leaving it open for 24 hours in a constant temperature and humidity chamber set at 30 ° C. and 90% RH, it was left for 24 hours,
The total weight (S) of the weighing bottle containing the sample knitted fabric is measured. It is calculated from the above weight values (K, H, S) by the following formula.

Maximum moisture absorption rate = [(S-K) / (K-F)]
× 100 (%) Standard moisture absorption rate = [(H−K) / (K−F)] × 100
(%)

<Drying speed> In the same manner as above, a sample knitted fabric was scoured, put in a weighing bottle, dried, allowed to cool, weighed, and 1 cc of distilled water was dropped onto the sample knitted fabric to enter the sample knitted fabric. Measure the total weight (W0) of the weighing bottle.

Next, the sample was placed in an open state in a constant temperature and humidity chamber set at 20 ° C. and 65% RH, and the weight of the weighing bottle containing the sample was taken at intervals of 10 minutes from the time (WT: T is the drying time). (Minutes)) is measured up to 90 minutes later.

(W0-WT) is plotted against time T, and the drying rate (cc / min) is determined from the slope of the tangent line at T = 0 of the obtained drying curve.

<PVP elution rate> In the same manner as above, a sample knitted fabric was scoured, put in a weighing bottle, dried, allowed to cool, and weighed.
It is treated in boiling water at 100 ° C. for 15 minutes in an open state, dried again, allowed to cool, and weighed again. The rate of change (%) in weight before and after the treatment is calculated and used as the PVP elution rate.

<Smoothness and stickiness> 20 ° C. 65% RH
Samples sewn in each form were worn by 5 panelists in a room in which the temperature and humidity were controlled, and evaluated in 3 grades (feeling x, not feeling very much, and not feeling at all ◎).

The clothing condition was changed appropriately according to the sample.
Slip measurement conditions are shown as an example. Basic conditions:
1. Clothing: Shorts + brassieres + sample slips + skirt (cotton) + long-sleeved blouse (polyester). 2. The wearer's time schedule; 20 minutes:
Rest → 10 minutes: walking (running m / c, 80m /
Minutes) → 5 minutes: rest and evaluation.

Example 1 Weight average molecular weight of about 45,000
Was added to the ε-caprolactam aqueous solution at various addition rates and polymerized at 240 ° C. for 5 hours to obtain PVP-containing polycapramide chip 4 levels having different addition rates.

This is extracted and dried by a conventional method to obtain P having a final PVP content of 1, 2, 7, or 15% by weight.
A VP-containing polycapramide chip was used.

On the other hand, 40 parts of an aqueous solution of ε-caprolactam was mixed with 45 parts of polyethylene glycol having an average molecular weight of 1500.
Parts and 15 parts of terephthalic acid were added and polymerized at 270 ° C. for 8 hours to obtain PEEA chips. The relative viscosity of the obtained PEEA chip in a 1 wt / vol% orthochlorophenol solution at 25 ° C. was 1.9.

A PVP-containing polycapramide chip was coated with 0.
After 5% by weight of PEEA chips were dry blended, they were melted at 270 ° C. by a usual melt spinning method and discharged from a 13-hole die. A hygroscopic nylon 6 filament yarn of 30 denier 13 filaments was obtained by a direct spinning and drawing method with a spinning speed of 1300 m / min, a draw ratio of 2.3 times and a winding speed of 3000 m / min (levels 2 to 5).

The obtained filament yarn was used as a tubular knitted fabric, and the maximum moisture absorption rate, standard moisture absorption rate and drying rate were measured.

As shown in Levels 2 to 5 in Table 1, all of the levels had a high maximum moisture absorption rate, and the difference between the maximum moisture absorption rate and the standard moisture absorption rate was as large as 2.5% or more, indicating excellent hygroscopicity. .
Moreover, the drying rate is as large as 0.017 cc / min or more,
It was excellent in moisture release and dehydration.

Next, these hygroscopic nylon 6 filament yarns and ordinary nylon 6 multifilament yarns are mixed with each other.
Knitting at a ratio of 0:50, knitting a half tricot, sewn on a slip, and a wearing test was conducted.
The sticky feeling was evaluated.

As shown in Levels 2 to 5 in Table 1, all levels had no sticky feeling, had a silky feel, and had no swelling feeling and were comfortable to wear.

Among them, the slips having the PVP contents of 2% by weight and 7% by weight (Nos. 3 and 4) were particularly excellent in wearing feeling.

[Comparative Example 1] A nylon 6 filament yarn was produced in the same manner as in Example 1 except that the content of PVP was changed to 0.5% by weight or 18% by weight to obtain a tubular knitted fabric ( Level 1, 6).

As in Example 1, as a result of evaluation by the tubular knitted fabric and the slip, as shown in Table 1, the level of 0.5% by weight (No. 1) was as low as the maximum moisture absorption rate of 6.9%, and The difference from the standard moisture absorption rate was as small as 2.2%, the hygroscopicity was poor, and there was a feeling of unevenness when worn.

On the other hand, at the level of 18% by weight (No. 6), the hygroscopicity was good, but the drying speed was slow at 0.013 cc / min, there was a sticky feeling, and the feeling of wearing was poor.

[0057]

[Table 1]

Example 2 The PEEA chip of Example 1 was chip-blended with the polycapramide chip of Example 1 having a PVP content of 2% by weight at a ratio of 1% by weight, 8% by weight and 10% by weight. The obtained chip was spun in the same manner as in Example 1 to obtain a hygroscopic nylon 6 filament yarn having 30 denier 13 filaments (level 8 to 10).

Further, the PEEA chip of Example 1 was chip-blended with the polycapramide chip of Example 1 having a PVP content of 7% by weight at a ratio of 3% by weight, 8% by weight and 10% by weight. The obtained chips were spun into fibers in the same manner as in Example 1 to obtain a hygroscopic nylon 6 having 30 denier and 13 filaments.
Filament yarns were obtained (levels 13-15).

The obtained hygroscopic filament yarn was used as a tubular knitted fabric, and the maximum moisture absorption rate, standard moisture absorption rate and PVP elution rate were measured.

As shown in the levels 8 to 10 and 13 to 15 in Table 2, all of the levels had a high maximum moisture absorption rate and a large difference between the maximum moisture absorption rate and the standard moisture absorption rate, and the moisture absorption properties were excellent. Moreover, the PVP elution rate was also small.

Next, these hygroscopic nylon filament yarns were knitted with ordinary nylon 6 filament yarns in the same manner as in Example 1 to form a half tricot, which was then slipped and a wearing test was conducted.

As shown by the levels 8 to 10 and 13 to 15 in Table 2, all of the levels had no sticky feeling and no unevenness and were comfortable to wear.

Particularly, when the PEEA content was 1 to 8% by weight (levels 8, 9, 13, and 14), the stickiness was particularly excellent.

[Comparative Example 2] Nylon 6 filament yarn was produced in the same manner as in Example 2 except that PEEA was not added to obtain a tubular knitted fabric (levels 7 and 12).

Further, a nylon 6 filament yarn was spun in the same manner as in Example 2 except that the content of PEEA was changed to 12% by weight. As a result, many yarn breakages occurred during spinning and stable spinning could not be performed (level). 11, 16).

As in Example 1, as a result of evaluation by the tubular knitted fabric and slip, as shown in Table 2, PVP 2% by weight, P
At the level of EEA 0% by weight (No. 7), there was a feeling of discomfort when worn.

Further, PVP 7% by weight, PEEA 0% by weight
The level of No. 12 (No. 12) has good hygroscopicity, but PVP
The elution rate was extremely large at 50% by weight of the content, and the sticky feeling was remarkable.

[0069]

[Table 2]

Example 3 Epsilon-caprolactam Aqueous Solution 4
60 parts of polyethylene glycol diamide adipate having an average molecular weight of 1500 was added to 0 part, and the mixture was polymerized at 270 ° C. for 8 hours to obtain a PEA chip.

The PVP-containing polycoupler chip having the PVP content of 1, 2, 7 or 15% by weight of Example 1 was
After dry blending 0.1 wt% PEA chips,
Melt spinning and direct spinning drawing were carried out in the same manner as in Example 1 to obtain hygroscopic nylon 6 filament yarn of 30 denier 13 filament (levels 22 to 25).

The obtained filament yarn was used as a tubular knitted fabric and evaluated in the same manner as in Example 1.

As shown by the levels 22 to 25 in Table 3, all of the levels had a high maximum moisture absorption rate, and the difference between the maximum moisture absorption rate and the standard moisture absorption rate was as large as 2.5% or more, indicating excellent hygroscopicity. . Moreover, the drying rate was as large as 0.016 cc / min or more, and the moisture-releasing and dehydrating property was excellent.

Next, these hygroscopic nylon 6 filament yarns were made into half tricots in the same manner as in Example 1, the slips were sewn, and a wearing test was conducted to evaluate.

As shown by the levels 22 to 25 in Table 3, all the levels had no sticky feeling, had a silky feel, and had no swelling feeling and were comfortable to wear.

Among them, the slips having the PVP contents of 2% by weight and 7% by weight (Nos. 23 and 24) were particularly excellent in wearing feeling.

[Comparative Example 3] A nylon 6 filament yarn was produced in the same manner as in Example 3 except that the content of PVP was changed to 0.5% by weight or 18% by weight to obtain a tubular knitted fabric (level). 21, 26).

As a result of evaluating the knitted fabric and slip in the same manner as in Example 3, as shown in Table 3, there was a feeling of unevenness when worn.

On the other hand, the level of 18% by weight (No. 26) is
Although it had good hygroscopicity, it had a slow drying rate of 0.013 cc / min, had a sticky feeling, and was poor in comfort when worn.

[0080]

[Table 3]

[Example 4] The PEA chip of Example 1 was added to the polycapramide chip of PVP content of 2% by weight of Example 1 at a ratio of 0.5% by weight, 5% by weight and 8% by weight of a chip blend. did. The obtained chip was spun in the same manner as in Example 3 to obtain a hygroscopic nylon 6 filament yarn having 30 denier 13 filaments (level 28 to 30).

Further, the PEA chip of Example 3 was chip-blended with the polycapramide chip of PVP content of 7% by weight of Example 1 at a ratio of 0.5% by weight, 5% by weight and 8% by weight. The obtained chip was spun in the same manner as in Example 1 to obtain a hygroscopic nylon 6 filament yarn having 30 denier 13 filaments (levels 13 to 15).

The obtained hygroscopic filament yarn was used as a tubular knitted fabric to measure the maximum moisture absorption rate, standard moisture absorption rate and PVP elution rate.

As shown by the levels 28 to 30 and 33 to 35 in Table 4, the maximum moisture absorption rate was high and the difference between the maximum moisture absorption rate and the standard moisture absorption was large, and the hygroscopicity was excellent.
Moreover, the PVP elution rate was also small.

Next, these hygroscopic nylon filament yarns were knitted with ordinary nylon 6 filament yarns in the same manner as in Example 1 to form half tricots, which were slipped, and a wearing test was conducted.

As shown by the levels 28 to 30 and 33 to 35 in Table 4, all of the levels had no sticky feeling and no unevenness and were comfortable to wear.

In particular, when the PEA content was 0.5 to 5% by weight (levels 28, 29, 33, 34), the feeling of stickiness was particularly excellent.

[Comparative Example 4] Nylon 6 filament yarn was produced in the same manner as in Example 4 except that PEA was not added to obtain a tubular knitted fabric (levels 27 and 32).

Further, when a nylon 6 filament yarn was spun in the same manner as in Example 4 except that the content of PEA was changed to 12% by weight, stable yarn could not be obtained due to many yarn breakages during spinning (level). 31, 36).

As in Example 3, as a result of evaluation by the tubular knitted fabric and slip, as shown in Table 4, 2% by weight of PVP,
At the level of 0% by weight of PEA (No. 27), there was a feeling of unevenness when worn.

At the level of 7% by weight of PVP and 0% by weight of PEA (No. 32), the hygroscopicity was good, but the elution rate of PVP was as large as 50% by weight of the content, and the sticky feeling was remarkable.

[0092]

[Table 4]

[Example 5] The PEA chip of Example 1 was blended with the polycapramide chip of Example 1 having a PVP content of 2% by weight at a ratio of 0.5% by weight. The obtained chips were spun into fibers in the same manner as in Example 1 to obtain hygroscopic nylon 6 filament yarns of 10 denier 5 filaments, 30 denier 10 filaments, 40 denier 13 filaments and 70 denier 24 filaments.

A hygroscopic nylon 6 filament yarn of 10 denier 5 filaments was covered around a polyurethane elastic yarn of 20 denier 3 filaments to produce a coated elastic yarn, from which pantyhose was knitted.

A half tricot was knitted by a conventional method using 6 filaments of hygroscopic nylon having 10 denier of 30 denier to produce a slip.

A hygroscopic nylon 6 filament of 40 denier 13 filament was false twisted into a crimped yarn by an ordinary method, and then a circular knit fabric was knitted by an ordinary method to produce tights and socks.

Further, a plain woven fabric was woven by a usual method using 70 denier 24 filament hygroscopic nylon 6 filament to manufacture a windbreaker.

The obtained pantyhose, tights,
When a wearing test was conducted on socks, slips, and windbreakers, no feeling of stickiness or stickiness was felt, and all were comfortable to wear.

Example 6 50 parts of ε-caprolactam and 50 parts of polyethylene glycol diammonium adipate having a molecular weight of 3000 were polymerized at 260 ° C. for 6 hours to obtain polyetheramide (PEA) chips.

The PECAP chips of Example 1 were blended in a proportion of 1% by weight, and the PEA chips of Example 1 were blended in a proportion of 1% by weight, and the PEA chips in a proportion of 0.5% by weight, to the polycapramide chips having a PVP content of 2% by weight of Example 1. The obtained chips were spun into fibers in the same manner as in Example 1, 10 denier 5 filaments, 30 denier 10 filaments, 40 denier 13 filaments,
A hygroscopic nylon 6 filament yarn of 70 denier 24 filament was obtained.

A hygroscopic nylon 6 filament yarn of 10 denier 5 filaments was covered around a polyurethane elastic yarn of 20 denier 3 filaments to produce a coated elastic yarn from which a pantyhose was knitted.

A half tricot was knitted by a conventional method using a hygroscopic nylon 6 filament of 10 denier 10 filament to produce a slip.

Tights and socks were produced by knitting a circular knitted fabric by a usual method after false twisting a hygroscopic nylon 6 filament of 40 denier 13 filaments into a crimped yarn by a usual method.

A plain woven fabric was woven by a normal method using 6 hygroscopic nylon 6 filaments of 70 denier 24 filaments to manufacture a windbreaker.

The obtained pantyhose, tights,
When a wearing test was conducted on socks, slips, and windbreakers, no feeling of stickiness or stickiness was felt, and all were comfortable to wear.

[0106]

EFFECTS OF THE INVENTION According to the present invention, the polyamide fiber has excellent characteristics such as high strength, abrasion resistance, softness, gloss characteristics, dyeing sharpness, and silky feeling, while having high hygroscopicity. It can be a polyamide fiber having.

Therefore, it is possible to obtain a fabric product for clothes made of polyamide fiber, which is excellent in hygroscopicity and has no feeling of stickiness or stickiness, and in particular, as innerwear or socks worn directly on the skin. It is also suitable as sportswear.

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Claims (4)

[Claims] 1. Containing 1% by weight or more and 15% by weight or less of polyvinylpyrrolidone with respect to the polyamide, and 0.1% by weight or more and 10% by weight or less of the polyether ester amide and / or polyether amide with respect to the polyamide. A hygroscopic polyamide fiber characterized by the above. 2. An innerwear comprising the hygroscopic polyamide fiber according to claim 1. 3. A sock using the hygroscopic polyamide fiber according to claim 1. 4. A sportswear comprising the hygroscopic polyamide fiber according to claim 1.