JP2000290848A - Spun yarn and fabric of highly hygroscopic and moisture release - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain both a spun yarn comprising 100% synthetic fiber, having hygroscopic and moisture release performances, soft feeling and wearing comfortableness and a fabric comprising the spun yarn. SOLUTION: This spun yarn comprises a polyamide staple fiber and another organic fiber staple fiber. The polyamide staple fiber comprises a highly hygroscopic and moisture release polyamide fiber containing 3-7 wt.% of a polyvinyl pyrrolidone having <=0.1 pyrrolidone content. The polyamide stable fiber and the organic fiber staple fiber are twisted in 2.8-4.5 twist multiplier (cotton method). The spun yarn comprises >=30 wt.% of the polyamide staple fiber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spun yarn having moisture absorption / desorption performance, excellent surface quality, and excellent wearing comfort, and a fabric made of the spun yarn.

[0002]

2. Description of the Related Art Natural fibers typified by cotton and wool are preferred for their good feeling of comfort, such as their texture and sensation of stuffiness, and are widely used in applications ranging from underwear to outerwear. The main factor of the comfortable feeling of comfort is attributable to the moisture absorbing / releasing function of natural fibers. However, these natural fibers are inferior to synthetic fibers, such as the strength and moisture drying property of the fabric, and lack aesthetics such as suppleness and gloss, and are insufficient in surface touch.

[0003] On the other hand, although synthetic fibers can solve the drawbacks of natural fibers, it is an important required characteristic depending on the use, for example, to have comfortable wearing for underwear and socks. In addition, it is assumed that the cloth has a function of absorbing and releasing moisture. In order to provide this function, a method of applying a hygroscopic agent in a treatment with a fabric, that is, a finishing process, has been proposed, but problems such as durability and a rough texture are not solved. In addition, Tokiko Sho 60
As described in JP-A-457 and JP-A-60-215835, a fabric having a hygroscopic property is obtained by blending a fiber having a high equilibrium moisture content (moisture absorption) with a synthetic fiber, twisting, and the like. However, there is a problem that dyeability and physical properties are impaired, and a sufficient effect has not been obtained.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems and to provide a synthetic fiber 10 having a function of absorbing and releasing moisture, having a good texture, and being rich in coloring.
The object of the present invention is to provide a spun yarn of 0% and a fabric having a feeling of wearing comfort.

[0005]

The spun yarn of the present invention has the following structure to solve the above-mentioned problems.

That is, it is a spun yarn comprising a polyamide short fiber and a short fiber of another organic fiber. The polyamide short fiber contains polyvinylpyrrolidone having a hirolidone content of 0.1% by weight or less and 3 to 7% by weight. The polyamide staple fiber is made of a moisture-absorbing and desorbing polyamide fiber, and the polyamide staple fiber and the organic fiber staple fiber are twisted in a twist coefficient range of 2.8 to 4.5 (cotton type). Is contained in an amount of 30% by weight or more.

Further, the organic fiber is a spun yarn characterized by being a short fiber mainly composed of polyacrylonitrile or a short fiber mainly composed of polyethylene terephthalate, and the organic fiber is mainly composed of the polyacrylonitrile. When the spun yarn is composed of the short fibers to be formed and the polyamide short fibers, the polyamide short fibers are contained in an amount of 30% by weight or more, and the short fibers mainly composed of the polyethylene terephthalate and the short polyamide fibers are used. When comprising a spun yarn from the above, the polyamide short fiber is contained in an amount of 40% by weight or more.

[0008] The cloth of the present invention has the following constitution in order to solve the above-mentioned problems.

That is, a spun yarn comprising a polyamide short fiber of 30% by weight or more and a short fiber of another organic fiber, wherein the polyamide short fiber contains polyvinylpyrrolidone having a pyrrolidone content of 0.1% by weight or less by 3 to 7%. % By weight of a highly moisture-absorbing / desorbing polyamide fiber, and the short fibers of the organic fibers are short fibers mainly composed of polyacrylonitrile or short fibers mainly composed of polyethylene terephthalate. When the spun yarn is composed of the short fiber and the polyamide short fiber, the polyamide short fiber is contained in an amount of 30% by weight or more, and the spun yarn is formed from the polyethylene terephthalate-based short fiber and the polyamide short fiber. When the polyamide short fiber comprises 40% by weight or more of the polyamide short fiber, the polyamide short fiber and the organic fiber And short fibers of, twisting coefficient 2.8
It is a fabric using a spun yarn, which is twisted in a range of 4.5 (cotton type).

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.

First, the polyamide short fiber constituting a part of the spun yarn of the present invention will be described. The polyamide short fiber used in the present invention contains 3 to 7% by weight of polyvinyl pyrrolidene (hereinafter referred to as PVP) with respect to the polyamide in order to obtain a required moisture absorbing / releasing function. If the content of PVP is less than 3% by weight, sufficient moisture absorption / release properties cannot be obtained. On the other hand, when the content exceeds 7% by weight, the moisture absorption / release performance is improved, but the yarn-making properties are poor, and stable production cannot be achieved.

The content of pyrrolidone is 0.1% of PVP.
The content is 1% by weight or less, preferably 0.03% by weight or less. If the pyrrolidone content exceeds 0.1% by weight, the whiteness of the fiber is reduced, so that it cannot be used for applications requiring pure whiteness, and further, the coloring property at the time of dyeing is reduced, It is difficult to obtain a vivid hue. The polyamide staple fiber produced in the above manner has a parameter of moisture absorption / desorption performance of ΔMR (%), that is,
The difference between the maximum moisture absorption rate and the standard moisture absorption rate is in the range of 4% to 4.5%, so that high moisture absorption / release properties are added and whiteness is excellent.

Next, the organic fiber constituting a part of the spun yarn of the present invention will be described. First, the short fibers mainly composed of polyacrylonitrile employed in the present invention are defined as at least 94 mol% of polyacrylonitrile and 2 to 5 mol% of monoethylenic vinyl monomers having copolymerizability with the polyacrylonitrile. It is desirable to employ a fiber made of a polyacrylonitrile copolymer containing 0.2 to 0.7 mol% of a sulfonic acid group-containing vinyl monomer.

The short fibers mainly composed of polyethylene terephthalate used in the present invention are melt-spinnable polyester polymers such as polyethylene terephthalate and the like, and if necessary, isophthalic acid, polyethylene glycol, One or several kinds of third components such as polytetramethylene glycol may be copolymerized.

The weight ratio of the highly moisture-absorbing polyamide short fibers used in the present invention to the spun yarn is 30% by weight or more.

The difference between the maximum moisture absorption and the standard moisture absorption, that is,
ΔMR (%) is a value that is an index of a feeling of stuffiness when worn,
If the value is too low, the water vapor generated by wearing is not sufficiently absorbed, and a so-called stuffy feeling occurs. Therefore, in order to obtain a feeling of wearing comfort, a cloth made of spun yarn must be used.
It has been experimentally proved that the MR (%) is 1.7% or more.

Therefore, in order to add 1.7% or more of ΔMR (%), the ΔMR (%) of the polyamide short fiber must be 4%.
If the original yarn is used, the weight ratio to the spun yarn is 30%
The above is the description.

Here, the ΔMR (%) value which is a parameter of the moisture absorption / release performance will be described in more detail.

The （MR (%) value is a value obtained by subtracting the standard moisture absorption rate (MR1) at 20 ° C x 65% RH from the maximum moisture absorption rate (MR2) at 30 ° C x 90% RH.

That is, ΔMR (%) = MR2-MR1
It is represented by

Here, ΔMR (%) is a driving force for releasing moisture in the clothes to the outside air when the clothes are worn, and is 3% when light to medium work or light to medium exercise is performed.
Temperature and humidity in clothes represented by 0 ° C x 90% RH and 20 ° C x
It is a difference in moisture absorption from the outside temperature and humidity represented by 65% RH. That is, the larger the ΔMR (%) value, the higher the moisture absorption / desorption performance, and the better the comfort when worn.

Therefore, in order to obtain the target ΔMR (%) value of the product, the blending ratio of the high moisture-absorbing polyamide short fiber of the spun yarn and other organic fibers, and the ΔMR (%) of the high moisture-absorbing polyamide short fiber used The value is important.

Here, how to determine the target fineness of the polyamide short fiber will be described. The target ΔMR (X%) value in the fabric comprising the spun yarn of the present invention is represented by the following equation.

X = (YQ / 100) + (ZP / 100)
Where Y is the ΔMR value (%) of the polyamide short fiber, Z is the ΔMR value (%) of the other organic fiber short fiber, and Q is the proportion of the spun yarn of the polyamide short fiber. % By weight P is the percentage by weight of other organic fibers in the spun yarn.
(%).

Therefore, the required blending ratio of the polyamide short fibers and the short fibers of other organic fibers is Q: P.

That is, the spun yarn count is 30's.
(Cotton type), the target ΔMR value of the spun yarn fabric is 2.1%, and the ΔMR value of the polyamide short fiber is 4.0%.
%, When the short fibers mainly composed of polyacrylonitrile are used as the short fibers of the other organic fibers, the value of ΔMR is 0.1%.
Assuming that it is 8%, the weight% and Q of the polyamide short fiber in the spun yarn are 40.6% according to the above formula (1).

Therefore, the target ΔMR value of the cloth can be set by the blend ratio of the polyamide short fibers. Further, the calculated value of the target ΔMR value and the actually measured value are approximately similar.

Next, the number of twists of the spun yarn of the present invention will be described.

The twist coefficient of the spun yarn of the present invention is 2.8 to 4.
5 (cotton type). If the twist coefficient is less than 2.8, the short fibers constituting the spun yarn are detached from the spun yarn, causing a problem that the spun yarn is liable to be fluffed. Inviting, the spinnability becomes extremely poor.

On the other hand, when the twist coefficient exceeds 4.5, the product texture becomes coarse and hard due to the strong twist, which is unsuitable for use in clothing. Therefore, the twist coefficient of the spun yarn is 2.
By setting the value in the range of 8 to 4.5, a product having a good texture can be obtained while maintaining stable quality and spinnability.

The twist coefficient is a value obtained by the following equation.

Twist coefficient (k) = T / Ne ^1/2 where T is the number of twists (times / inch) and Ne is the spinning number (cotton type).

The short fibers of the organic fibers used in the present invention are particularly preferably short fibers mainly composed of polyacrylonitrile or short fibers mainly composed of polyethylene terephthalate, since their characteristics can be maximized. It is also preferable to include other fibers in small amounts as long as the above can be achieved.

Now, the present invention will be described in further detail with reference to Examples.

[0035]

EXAMPLES The evaluation method used in the present invention will be specifically described below. <ΔMR> A cloth made of the spun yarn of the present invention is placed in a glass weighing bottle (tare weight F) and dried in a dryer at 110 ° C. for 2 hours. Seal the bottle and place in a desiccator for 30
After allowing to cool for minutes, the total weight K of the weighing bottle containing the sample is measured. Next, it is placed in a thermo-hygrostat set at 20 ° C. × 65% RH in an open state and left for 24 hours. Thereafter, the sample is left in a desiccator in a sealed state again for 30 minutes, and then the weight H of the weighing bottle containing the sample is measured. Continue at 30 ° C x 90%
The opened weighing bottle is placed in a thermo-hygrostat set at RH, and the total weight S after 24 hours is measured in the same manner. It is calculated from the above values by the following formula.

Maximum moisture absorption MR2 = [(SK) / (K-
F)] × 100 (%) Standard moisture absorption MR1 = [(H−K) / (K−F)] × 10
0 (%) ΔMR (%) = MR2−MR1 Therefore, a larger ΔMR value indicates higher moisture absorption / release performance. <Yellowness> Prepared using a 27G tubular knitting machine, and tristimulus values X,
Y and Z were measured, and the YI value was determined by the following equation.

YI (degree of yellowing) = 100 × [1.28X−
1.06Z] / Y The smaller the YI value, the closer to white. <L value> The lightness of the black color of the fabric comprising the spun yarn of the present invention was measured by measuring the L value of a multi-source spectrophotometer MSZ-2 (manufactured by Suga Test Instruments). The smaller the L value, the better the black color development. <Hand feeling> A sensory evaluation was performed on a fabric made of the spun yarn of the present invention by the touch feeling of five inspectors, and as a result,
◎: extremely good, ：: good, Δ: slightly poor, ×: poor. <Steaminess> Five subjects wear the underwear made of the spun yarn of the present invention, and the results are shown by the same standard as the above-mentioned texture. <Spinnability> The number of occurrences of yarn breakage in the case where the spun yarn of the present invention is manufactured by a spinning machine is shown. A: 5 times / 1
000 weights, extremely good in 1 hour or less, ○: 6 to 10 times /
Good at 1000 weights / hour, △: 11 times / 1000 weights /
Indicated by a standard of a little bad after 1 hour or more. (Example 1) Nylon 6 having a relative viscosity of 98% sulfuric acid of 2.8 using a polymer having a pyrrolidoline content of 0.02% by weight in PVP synthesized by a usual method using isopropyl alcohol as a solvent was used. The mixture was extruded into a gut shape, cooled, and then pelletized to obtain a master polymer chip having a PVP concentration of 30%.

Next, in a rotary vacuum dryer, nylon 6 chips and the above-mentioned master polymer chips were dried by a usual method while blending them at a predetermined ratio. The content of PVP with respect to nylon 6 in the blend chip obtained by drying was 3% by weight.

The blend chip was melted at 260 ° C., discharged from a circular discharge hole, stretched at a spinning speed of 1300 m / min, a draw ratio of 2.3 times, and a winding speed of 3000 m / min. Denier, PV with a fiber length of 38 mm
P-containing nylon 6 short fibers were obtained.

30% by weight of the polyamide short fiber, 70% by weight of a polyacrylonitrile short fiber having a fiber denier of 0.6 denier and a fiber length of 38 mm, a spinning coefficient k = 3.2 and a spinning count of 30. 's (cotton type) spun yarn was produced.

The spun yarn was knitted in a circular knitted fabric of a 28G sheeting structure, and was dyed black with an acid dye and a cationic dye by two-stage dyeing in one bath.

The content of PVP in the obtained polyamide short fibers, the content of pyrrolidone in PVP, the degree of yellowing before dyeing,
Table 1 shows the MR value, the ΔMR value of the cloth made of the spun yarn of the present invention, the stuffiness when worn, and the color development. (Example 2) P of polyamide short fiber to nylon 6
A spun yarn was obtained in the same manner as in Example 1 except that the VP content was changed to 7% by weight. A fabric was obtained from the obtained spun yarn in the same manner as in Example 1. P of the obtained polyamide short fiber
VP content, pyrrolidone content in PVP, degree of yellowing before dyeing, ΔMR value, ΔM of the fabric comprising the spun yarn of the present invention
Table 1 shows the R value, the stuffiness of wearing, the coloring, and the texture. Comparative Example 1 P of polyamide short fiber to nylon 6
A spun yarn was obtained in the same manner as in Example 1, except that the VP content was changed to 0.5% by weight. A fabric was obtained from the obtained spun yarn in the same manner as in Example 1. The PVP content of the obtained polyamide staple fiber, the pyrrolidone content in PVP, the degree of yellowing before dyeing, the ΔMR value, the ΔMR value of the fabric comprising the spun yarn of the present invention, the feeling of stuffiness, and the coloring property were measured. It is shown in Table 1. (Comparative Example 2) A spun yarn was obtained in the same manner as in Example 2 except that the content of pyrrolidoline in PVP contained in nylon 6 of polyamide short fiber was changed to 0.5% by weight. A fabric was obtained from the obtained spun yarn in the same manner as in Example 1. The PVP content of the obtained polyamide staple fiber, the pyrrolidone content in PVP, the degree of yellowing before dyeing, the ΔMR value, the ΔMR value of the fabric comprising the spun yarn of the present invention, the feeling of stuffiness, and the coloring property were measured. It is shown in Table 1. (Comparative Example 3) P of polyamide short fiber to nylon 6
A spun yarn was obtained in the same manner as in Example 1 except that the VP content was changed to 15% by weight. Example 1 from the obtained spun yarn
A fabric was obtained in the same manner as described above. The PVP content of the obtained polyamide staple fiber, the pyrrolidone content in the PVP, the degree of yellowing before dyeing, the △ MR value, and the △
Table 1 shows the MR value, the feeling of stuffiness and the coloring.

[0043]

[Table 1]

ΔM of the fabrics obtained in Examples 1 and 2
It shows a high value of R value of 1.7 to 1.9%, and there is no stuffiness,
Wearing comfort was good. Furthermore, the content of PVP contained in the polyamide short fiber and the content of pyrrolidrin content in PVP are also within the preferred ranges.
The color development was also good along with the improvement of the value.

On the other hand, although the fabric obtained in Comparative Example 1 had good color developability, the ΔMR value was as low as 1.4%, and there was a stuffy feeling when worn, so that wearing comfort was not obtained.

Further, the ΔMR of the cloth obtained in Comparative Example 2 was
The value was 1.8%, the feeling of stuffiness during wearing was eliminated, and the wearing comfort was good. However, the coloring property is such that the content of pyrrolidoline in the PVP contained in the polyamide short fiber is 0.15% by weight, which is a high content. Therefore, the polyamide short fiber has a high degree of yellowing before dyeing and lacks transparency, and is made of a polyacrylonitrile short fiber and spun yarn. The L value of the fabric after dyeing is high, and the color developability is low.

Further, the ΔMR of the cloth obtained in Comparative Example 3
The value is as high as 2.6%, and the feeling of stuffiness at the time of wearing is eliminated, and the wearing comfort is good. However, the coloring property is as high as 15% by weight of the PVP contained in the polyamide short fiber. High, therefore, polyamide staple fiber has a slightly higher yellowing degree before dyeing, lacks transparency, and is made into a spun yarn with polyacrylonitrile staple fiber. I have. The ΔMR value of the fabric obtained in Comparative Example 3 was as high as 2.6%, and the comfort when wearing it was high. However, when the content of PVP was set high, the production cost of polyamide short fibers increased. In addition, the color fastness decreases. (Example 3) Spinnability when producing the spun yarn of Example 1,
Table 2 shows the ΔMR value, the feeling of stuffiness and the feeling of the cloth made of the spun yarn. (Example 4) A spun yarn was obtained in the same manner as in Example 1 except that the blending ratio of the polyamide short fiber was 60% by weight. Spinnability at the time of producing the spun yarn, ΔM of the fabric comprising the spun yarn
Table 2 shows the R value, the feeling of stuffiness, and the texture. (Example 5) 100% by weight of blend ratio of polyamide short fiber
A spun yarn was obtained in the same manner as in Example 1, except that The spinnability at the time of manufacturing the spun yarn, and the fabric of the spun yarn
Table 2 shows the MR value, wearing stuffiness, and texture. (Comparative Example 4) A spun yarn was obtained in the same manner as in Example 1 except that the blending ratio of the polyamide short fibers was changed to 20% by weight. Spinnability at the time of manufacturing the spun yarn, ΔM of the fabric comprising the spun yarn
Table 2 shows the R value, stuffiness and texture.

[0048]

[Table 2]

In Examples 3, 4, and 5, the ΔMR value was 1.7% or more.
It was in the range of 4.0%, and the feeling of wearing stuffiness was eliminated and the feeling of wearing comfort was excellent. In addition, the texture is good,
In addition, spinning properties were also excellent.

Comparative Example 4 was excellent in spinnability, and preferred the soft texture of polyacrylonitrile. However, the ΔMR value was 1.4%, and there was a feeling of stuffiness.
The feeling of wearing comfort was lacking. (Example 6) 40% by weight of the polyamide short fiber of Example 1
And 60% by weight of polyester short fiber having a single yarn fineness of 0.75 denier and a fiber length of 38 mm, and a twist coefficient k = 3.
In step 2, a spun yarn having a spinning count of 30's (cotton type) was produced.
A fabric was obtained from the obtained spun yarn in the same manner as in Example 1.

Table 3 shows the spinnability at the time of producing the spun yarn, the ΔMR value of the cloth made of the spun yarn, the feeling of stuffiness when worn, and the texture. (Example 7) A spun yarn was obtained in the same manner as in Example 6, except that the blending ratio of the polyamide short fiber was 70% by weight. Spinnability at the time of producing the spun yarn, ΔM of the fabric comprising the spun yarn
Table 3 shows the R value, stuffiness and texture. Example 8 100% by Weight of Blended Polyamide Short Fiber
A spun yarn was obtained in the same manner as in Example 6, except that The spinnability at the time of manufacturing the spun yarn, and the fabric of the spun yarn
Table 3 shows the MR value, the feeling of stuffiness and the texture. (Comparative Example 5) A spun yarn was obtained in the same manner as in Example 6, except that the blending ratio of the polyamide short fiber was 30% by weight. Spinnability at the time of producing the spun yarn, ΔM of the fabric comprising the spun yarn
Table 3 shows the R value, stuffiness and texture.

[0052]

[Table 3]

In Examples 6, 7, and 8, the ΔMR value was 1.7% or more.
It was in the range of 4.0%, and the feeling of wearing stuffiness was eliminated and the feeling of wearing comfort was excellent. In addition, the texture is good,
In addition, spinning properties were also excellent.

In Comparative Example 5, the spinning properties were excellent, and the soft texture of the polyester was preferable.
The MR value was 1.3%, and there was a feeling of wearing stuffiness, and the wearing comfort was lacking.

[0055]

According to the present invention, a synthetic fiber 100 having moisture absorbing and releasing performance of 100% synthetic fiber and having no stuffy feeling and wearing comfort.
% Of spun yarn, and a product excellent in wash and wear properties not found in natural fibers.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4G066 AC17C AC23C AC26C AC33B AD11B BA03 BA16 CA43 DA03 FA03 FA14 FA37 GA06 4L035 BB31 BB88 BB91 DD15 DD19 EE05 EE20 FF10 LC02 LC08 4L036 MA05 MA06 MA35 MA39 PA21 PA31 A33 PA46 A46PA46A AA24 AA35 AA54 AB05 AB12 AC15 CA07

Claims (4)

[Claims] 1. A blend of 30% by weight or more of highly hygroscopic polyamide short fibers containing 3 to 7% by weight of polyvinylpyrrolidone having a pyrrolidone content of 0.1% by weight or less and other organic fibers. A spun yarn characterized by being twisted at a coefficient k of 2.8 to 4.5 (cotton type). 2. The organic fiber according to claim 1, wherein the organic fiber is a short fiber mainly composed of polyacrylonitrile, and the blend ratio of the highly moisture-absorbing / desorbing polyamide short fiber is 30% by weight or more. Spun yarn. 3. The organic fiber according to claim 1, wherein the organic fiber is a short fiber mainly composed of polyethylene terephthalate, and the blend ratio of the high moisture absorbing / desorbing polyamide short fiber is 40% by weight or more. Spun yarn. 4. A fabric comprising the spun yarn according to claim 1.