JPH1025638A - Multilayered structural yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a multilayered structural yarn, capable of preventing a cold feeling or an uncomfortable feeling after wearing thereof and excellent in diffusivity of water, quick-drying properties, wetting returning resistance and useful for various clothes such as sportswears or inners by composing the outermost layer of a hydrophobic fiber and a part of an inner layer, etc., of Lyocell (R) fiber. SOLUTION: This multilayered structural yarn comprises a structure of two or more layers and the outermost layer is composed of a hydrophobic fiber such as a polyamide or a polyester. At least a part of an inner layer and/or an intermediate layer is composed of Lyocell (R) fiber prepared by dissolving natural cellulose in an organic solvent such as a tertiary amine N-Oxide and spinning the resultant spinning solution. The resultant multilayered structural yarn is preferably used to produce a multilayered structural fabric.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn having a diffusibility of water, a quick drying property and a property of preventing re-wetting, which is used for various clothing fabrics such as sports and innerwear.

[0002]

2. Description of the Related Art Conventionally, when sweating, the entire surface of the yarn forming clothing such as sports and innerwear becomes wet and sticky, and after sweating due to poor drying property. May cause chills and discomfort. Conventionally,
Combining hydrophilic cellulose fibers and hydrophobic synthetic fibers,
There is known a yarn which attempts to improve this problem by utilizing the sweat absorbing action of cellulose fibers and the diffusing action of synthetic fibers.

[0003] As a method thereof, water is diffused by utilizing the capillary action of the synthetic filament of the core by means of a double-layered yarn in which a synthetic filament is wound around a core by short spinning and a short cellulose fiber is wound around a sheath. In order to improve the wettability, furthermore, a hydrophobic synthetic long fiber is disposed on the outermost layer of the two-layered yarn to form a three-layered yarn, and the moisture is transferred to the inner layer of the cellulose fiber for wetting. Threads that prevent return are known. However, in the case of conventionally used cellulose fibers such as cotton, cuprammonium rayon, viscose rayon, etc., the diffusion of water is hindered because the cellulose fibers absorb water and swell, so that water is locally held. As a result, the drying property and the property of preventing the water from returning to the water were not sufficient. In particular, in the case of cellulose spun yarn, the short fiber portion is bulky and has many voids, and water is stored in these voids, and at the same time, the diffusion of water is greatly increased by cutting the fibers that conduct water for the short fibers. It was hindered.

In addition, the cellulose multifilament yarn and the synthetic fiber are uniformly entangled with each other by a method such as air mixing or false twisting after air mixing to form a composite fiber. A method of combining moisture absorption characteristics with the diffusivity and quick drying properties of synthetic long fibers, or using a synthetic fiber as a core and a cellulose multifilament yarn as a sheath to improve water absorption, hygroscopicity, and water diffusibility. There is. Although the water diffusibility is improved as compared with the composite of the cellulose spun yarn, the cellulose multifilament yarn absorbs water and swells. Since the cellulose fibers were exposed and contained water, it was difficult to completely eliminate the sticky feeling on the surface.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a yarn having various properties, such as sports, innerwear, and the like, which has water diffusibility, quick-drying property and anti-wetting property, and a cloth made of the yarn.

[0006]

Means for Solving the Problems The present inventors have conducted intensive studies on the above-mentioned problems, and as a result, have found that a multi-layered yarn having two or more layers, the outermost layer is composed of hydrophobic fibers, and the inner layer and / or Alternatively, it has been found that the object of the present invention can be achieved by a multi-layer structure yarn in which at least a part of the intermediate layer is composed of lyocell fiber and a multi-layer structure fabric composed of the multi-layer structure yarn. The present invention also includes the following embodiments. The multilayer yarn or multilayer fabric according to claim 1 or 2, wherein the lyocell fiber occupies at least 20% by volume of the entire composite yarn in the inner layer and / or the intermediate layer. The ratio of the hydrophobic fibers in at least the outermost layer occupies 60% or more of the area ratio of the side surface of the yarn.
Or the multilayer-structured yarn or multilayer-structured fabric according to 2. The multilayer yarn or multilayer fabric according to claim 1 or 2, wherein the surface of the hydrophobic fiber is made hydrophilic.

Hereinafter, the present invention will be described in detail. In the present invention, it is necessary to use lyocell fiber for at least a part of the inner layer and / or the intermediate layer. The lyocell fiber used in the present invention means a cellulose fiber obtained by spinning from an organic solvent. That is, due to the excellent water absorption of the lyocell fiber, water is instantly absorbed by the inner layer and / or the intermediate layer, and the lyocell fiber has a lower degree of swelling than conventional copper-ammonium rayon, viscose rayon and the like. Therefore, the water is diffused over a wide range by the capillary using the minute voids between the single fibers without locally absorbing water inside the cellulose fibers and swelling.

[0008] The lyocell fiber used for the inner layer and / or the intermediate layer only needs to be used for at least a part of the inner layer and / or the intermediate layer, and is mixed with other synthetic fibers, natural fibers, and regenerated fibers. It may be in a state. However, in order to absorb water instantaneously in the inner layer and / or the intermediate layer and not to return to the outermost layer, the lyocell fiber is applied to the inner layer and / or the intermediate layer in a volume ratio of 20% or more of the entire composite yarn. Preferably, it is 30% or more. In detail, the lyocell fiber used in the present invention refers to a cellulose fiber obtained by dissolving cellulose in an organic solvent that dissolves natural cellulose to form a cellulose solution, and using this solution as a spinning solution by wet spinning or dry spinning. .

For example, as described in JP-B-60-28848, a solution containing a cellulose and a non-solvent such as water basically dissolved in an organic solvent of cellulose is placed in the air or in a non-precipitating medium. By spinning, drawing (at a draw ratio of 3 times or more by pulling the fiber forming solution from the spinneret at a speed higher than the feed speed) and then treating with a non-solution. The organic solvent at this time may be a known organic solvent,
For example, the following amine oxides disclosed in JP-B-60-28848 may be used, and a different kind of solvent may be used.

In this case, the amine oxides used as the organic solvent include, for example, tertiary amine-N-oxides (for example, trimethylamine, triethylamine, tripropylamine, monomethyldiethylamine, dimethylmonoethylamine, monomethylamine). N-dimethyl-, N-diethyl-, N
-Oxide of dipropylcyclohexylamine; oxide of pyridine; cyclic mono (N-methylamine-N-oxide) such as N-methylmorpholine-N-oxide. The use of N-methylmonophorin-N-oxide is preferred.

The form of the lyocell fiber used in the present invention may be either a spun yarn or a multifilament yarn. However, a multifilament yarn in which the fibers are more finely packed and which is not cut is more suitable for the capillary. This is preferable because the diffusivity of water utilizing the phenomenon is further improved. Furthermore, the denier of single yarn, the number of filaments, and the cross-sectional shape are not particularly limited. However, in consideration of the consumable properties as a fabric for clothing and the workability of yarn, the total denier is 20 d to 300 d.
d, the single yarn denier is preferably 0.5d to 10d.

Further, a cross-sectional shape such as W, C, L, Y or the like having a larger surface area than a normal cross section is more preferable since the capillary suction force for diffusing water increases. Further, the yarn used for the outermost layer needs to be a hydrophobic fiber.
For example, synthetic fibers such as polyamide, polyester, acrylic, polyethylene, and polypropylene are used, and the form may be any of original yarn and processed yarn. Further, any of spun yarn and multifilament yarn may be used.
The cross-sectional shape is not particularly limited, but is preferably a multifilament yarn in terms of water diffusibility,
In addition, a cross-sectional shape such as W, C, L, or Y having a larger surface area than a normal cross-section diffuses water supplied from the synthetic fiber side of the yarn surface, and simultaneously has an inner layer and / or
Alternatively, the capillary suction force transmitted to the organic solvent-spun cellulose fibers in the intermediate layer increases, which is more preferable.

[0013] The fineness of the synthetic fiber used in the present invention is not particularly limited, but the total denier is 20 d to 300 d in consideration of use for clothing.
The single yarn denier is preferably in the range of about 0.1 d to 10 d. In particular, when it is applied to a cloth for sports clothing which must be able to withstand severe conditions, 1d to 5d is more preferable, and when it is applied to a cloth for inner clothing which emphasizes a soft touch and a feeling, 0.1 to 5d is preferable. 3d is more preferred.

Since the outermost layer of the multilayer structure yarn is a hydrophobic fiber, the water in the outermost layer is instantaneously diffused and transferred to the lyocell fiber in the inner layer and / or the intermediate layer, and the water in the outermost layer is extremely reduced. Therefore, the surface of the multilayer structure yarn becomes smooth. Furthermore, since the lyocell fiber diffuses water and holds it in the inner layer side, water does not wet back to the outermost layer due to external pressure or the like. The multilayer structure yarn referred to in the present invention is a yarn having a two-layer structure, three-layer structure or more layer structure, and any layer structure yarn having a two-layer structure or more. It does not matter.

Further, the multilayered yarn referred to in the present invention is:
The outermost layer, the inner layer, and / or the intermediate layer do not need to be completely separated and independent from each other, and may have a layer structure in appearance, and a single fiber of the yarn constituting each layer is adjacent. It may be partially mixed with the single fiber of the yarn constituting the layer to be formed, or may be slightly reversed. However, at least the ratio of the hydrophobic fibers in the outermost layer is 60% or more, preferably 6.5%, in the area ratio of the yarn side surface.
It is necessary that the ratio be in the range of 10 to 8.5% in order to prevent re-wetting. Such a multilayered yarn may be manufactured using any method, for example, a yarn obtained by a covering method using a covering machine, or two different yarns using a high-speed fluid injection nozzle. By composite false twisting, which is air entangled and subsequently false twisted, a structure is formed in which one covers the other depending on the degree of crimp, resulting in a layered structure or two types of yarns with different elongations. By elongation difference composite false twist which is false twisted after air entanglement, one with a layer structure by winding a yarn with high elongation around a yarn with low elongation, or using a high-speed fluid injection nozzle In the air entanglement processing method, there is a method in which two kinds of different yarns are fed with a feed difference so that one of the yarns is wound around the other to cover the other yarn to form a layered structure.

Further, by covering another layered yarn with the layered yarn obtained by the air entanglement processing method, a multilayered layered yarn can be obtained. In addition, a ply-knitted yarn obtained by twisting two different yarns or a composite false-twisted yarn which is air-entangled and then false-twisted is formed into a woven or knitted fabric. A composite yarn may be used in which one is wrapped around the other due to characteristics such as shrinkage and has a layer structure in the knitted fabric. Furthermore, when the lyocell fiber located in the inner layer and / or the intermediate layer is subjected to false twisting, the lyocell fiber used in the present invention has a good crimp-holding property, and thus has a bulky, lightweight, and heat-retaining effect. It becomes a multilayer structure yarn.

Further, it is preferable that the surface of the hydrophobic fiber constituting the multilayer yarn of the present invention is made hydrophilic. Due to the hydrophilicity of the fiber surface, the water absorption rate in the outermost layer of the multilayer structure yarn is increased, and the moisture transfer rate and moisture diffusion rate to the inner layer and / or the intermediate layer of the multilayer structure yarn can be increased. As a result, it is easy for the water to move to the inner layer side and to be easily diffused without stagnation, so that the water spreads and dries,
The wettability is better.

The hydrophilic surface of the hydrophobic fiber constituting the multilayered yarn of the present invention may be hydrophilized by any method. For example, the multilayered yarn of the present invention may be used. The yarn may be wound up into a cheese form, and may be subjected to a hydrophilic treatment in the manner of a pre-dyeing process. Alternatively, after the multilayer structured yarn of the present invention is formed into a woven or knitted fabric, a hydrophilic treatment is performed as a post-dyeing treatment process. However, the present invention is not limited to these. A known hydrophilic agent such as a polyethylene glycol-based resin agent may be used for the hydrophilic agent, and the hydrophilic treatment may be performed using a recommended formulation such as immersion treatment, padding treatment, or spray treatment at the recommended concentration. . In the case where the synthetic fiber constituting the outermost layer of the multi-layer structure yarn of the present invention is originally hydrophilic, the surface of the fiber may be hydrophilized, but is not particularly required.

[0019]

EXAMPLES The present invention will be described specifically with reference to Examples.
The present invention is not limited to these. Lyocell fibers used in the examples were prepared as follows. <Production of Lyocell Fiber> According to the production method described in JP-B-63-28848, pulp and an aqueous solution of N-methylmorpholine-N-oxide are put in a mixing tank and mixed under reduced pressure to obtain a cellulose concentration of 10%. A cellulose solution was prepared. The cellulose solution was subjected to air gap spinning at 124 ° C. under the conditions shown in Table 1. The spun yarn is scoured by washing with water, dried and wound up to a dry strength of 4.0 g /
d, having properties of 7.5% dry elongation and 72% secondary swelling 5
A multifilament yarn of 0 denier / 33 filaments was obtained. The properties of the multilayer structured yarn were evaluated by the following evaluation method after the yarn was formed into a knitted fabric.
It was shown to.

<Evaluation Method> Diffusivity: A water drop of 0.05 cc was placed on a glass plate,
The prepared knitted fabric is placed on a water drop, and a water diffusion area (cm ² ) after 2 minutes is calculated. Anti-wetting property: 0.2 cc water drop is placed on a glass plate, and the prepared knitted fabric is placed on the water drop so that the back surface is facing down, and the knitted fabric absorbs water for 1 minute. Subsequently, the knitted fabric is placed on the filter paper, a load of 0.5 g / cm ² is applied from above on the filter paper for 30 seconds, the amount of water a that has returned to the filter paper is measured, and the percentage of wet return is calculated as follows. Wetting return rate (%) = a / 0.2 × 100% Drying property: 0.2 cc of water was dropped on a 10 cm square knitted fabric, and the ambient temperature was reduced by irradiating infrared rays with an infrared moisture meter manufactured by Kett Science Laboratory. The water is dried at 50 ° C., and the time until the knitted fabric is completely dried is measured.

Wet feeling and sticky feeling: A water drop of 0.2 cc is placed on a glass plate, and a 10 cm square knitted fabric is placed on the water drop so that the back surface is facing down, and a load of 0.3 g / cm ² is applied. After allowing the knitted fabric to sufficiently absorb water for 30 seconds, the cloth that has absorbed the water is placed on the upper arm of a panel of 5 panelists, 5 men and 5 women, and the sensory evaluation of wet feeling and stickiness is performed. The results are evaluated as follows. Wet feeling and sticky feeling : ◎; ；: I felt wet and cold, but not sticky. ×: Felt cold and wet, and the fabric was very sticky.

(Example 1) The feed rate of 75 denier / 24 filament polyester fiber was set to 15%, and the feed rate of 50 denier / 33 filament lyocell fiber was set to 5% using a Murata Machine 335 air processing machine.
After performing Taslan processing at an air pressure of 7.0 kg / cm ² ,
DR = 0.98 times, processing speed 300m / min, number of twists 2600T / M, heater temperature 1 with Murata Machine 33H false twisting machine
False twisting was performed at 70 ° C. The obtained yarn was a multilayer structure yarn in which the polyester fiber was the outer layer of 6.5% and the lyocell fiber and the polyester fiber were the inner layer. After fabricating a knitted fabric with a 28GG single knitting machine using this multilayer structure yarn, the knitted fabric is scoured at 100 ° C. for 20 minutes, and at 130 ° C. for 30 minutes.
After dyeing for one minute, SR-1000 manufactured by Takamatsu Yushi Co., Ltd.
Was subjected to a hydrophilic treatment at 100 ° C. for 30 minutes using 5% owf. The basis weight of the knitted fabric was 129 g / m ² . The knitted fabric absorbs water instantaneously, and the absorbed water migrates to the inner layer side of the composite yarn and diffuses, with little wetting back to the surface, and good dryness. Met.

(Embodiment 2) Using an Italy twisting machine, 75 denier / 24 filament polyester fiber was fed to the lyocell fiber of Example 1 having a yarn supply speed of 10 m / min and 50 denier / 33 filaments at a spindle rotation speed of 10,000.
Covering was performed under the conditions of 1,000 rpm and the number of twists was Z-1500 T / M. The obtained yarn was a multilayer structure yarn in which the polyester fiber was 7.9% outer layer and the lyocell fiber was the inner layer. The multi-layered structure yarn is heated at 120 ° C. by an autoclave.
After steam heat treatment for 20 minutes, a knitted fabric was produced with a 28GG single knitting machine, and the knitted fabric was subjected to the same scouring, dyeing, and hydrophilizing treatments as in Example 1. The basis weight of the sheet knitted fabric is 1
It was 25 g / m ² . The knitted fabric absorbs water instantaneously, the absorbed water migrates to the inner layer side of the composite yarn and diffuses, and the wetting back of the water to the surface is extremely small,
The drying property was also good.

Example 3 A 50 denier / 33 filament lyocell fiber and a 75 denier / 36 filament polyester crimped yarn were twisted at Z-500 T / M using a DTB twisting machine of Ishikawa Seisakusho. A jersey knitted fabric was produced with the obtained yarn using a 28GG single knitting machine, and the same knitting, dyeing, and hydrophilizing treatment as in Example 1 was performed on the knitted fabric. The basis weight of the knitted fabric was 132 g / m ² , and when the yarn of this knitted fabric was enlarged, it was found to have a multilayer structure in which the polyester fiber was 6.5% outer layer and the lyocell fiber was the inner layer. The knitted fabric absorbs water instantaneously, and the absorbed water migrates to the inner layer side of the composite yarn and diffuses, and the wetting of the surface to the surface is extremely small, and the drying property is good. Was something.

(Example 4) Murata Kikai 335 air processing machine interlaces 50 denier / 33 filament lyocell fiber and 50 denier / 24 filament polyester fiber at a feed rate of 1.5% and an air pressure of 1.5 kg / cm ² . The mixed yarn was further twisted at 50-denier / 24-filament polyester crimped yarn at Z-500 T / M using a Kawasaki Seisakusho DTB twisting machine.
A jersey knitted fabric was produced with the obtained yarn using a 28GG single knitting machine, and the same knitting, dyeing, and hydrophilizing treatment as in Example 1 was performed on the knitted fabric. The basis weight of the knitted fabric is 144 g / m ² , and when the yarn of the knitted fabric is enlarged and viewed, it is a multi-layer structure yarn in which the polyester fiber is 8.5% outer layer and the inner layer has 20% lyocell fiber. there were. The knitted fabric absorbs water instantaneously, and the absorbed water migrates to the inner layer side of the composite yarn and diffuses extremely widely, with little re-wetting of water to the surface, and good dryness. It was something.

(Comparative Example 1) The feed rate of 75 denier / 24 filament polyester fiber was 5%, and the feed rate of 50 denier / 33 filament lyocell fiber described in Example 1 was 1 using a Murata Machine 335 air processing machine.
After performing a Taslan process at an air pressure of 7.0 kg / cm ² , DR = 0.98 with a Murata Machine 33H false twisting machine.
False twisting was performed at a processing speed of 300 m / min, a twist number of 2600 T / M, and a heater temperature of 170 ° C. The obtained yarn was a multi-layer structure yarn in which the lyocell fiber was 6.2% outer layer and the polyester fiber and lyocell fiber were the inner layer. After forming a knitted fabric with a 28GG single knitting machine using the multilayer structure yarn, the knitted fabric was subjected to the same scouring, dyeing, and hydrophilizing treatments as in Example 1. The basis weight of the knitted fabric was 130 g / m ² . The knitted fabric absorbed water instantaneously and had good water diffusibility, but the absorbed water was less likely to migrate to the inner layer side of the composite yarn, and the surface often wetted back to the surface, giving a sticky feeling. It was a knitted fabric.

(Comparative Example 2) The feed rate of 75-denier / 24-filament polyester fiber was set to 15%, and the feed rate of 50-denier / 30-filament copper-ammonium rayon fiber was set to 5% by a Murata Machine 335 air processing machine. After performing Taslan processing at an air pressure of 7.0 kg / cm ² , DR = 0.98 using a Murata Machine 33H false twisting machine.
False twisting was performed at a processing speed of 300 m / min, a twist number of 2600 T / M, and a heater temperature of 170 ° C. The obtained yarn was a multilayered yarn in which the polyester fiber was 6.8% outer layer, and the polyester fiber and the copper ammonia rayon fiber were the inner layer. After forming a knitted fabric with a 28GG single knitting machine using the multilayer structure yarn, the knitted fabric was subjected to the same scouring, dyeing, and hydrophilizing treatments as in Example 1. The basis weight of the knitted fabric was 131 g / m ² . The knitted fabric absorbs water instantly,
The absorbed water migrates to the inner layer side of the composite yarn. However, since the diffusion of the water in the inner layer is insufficient, the surface of the knitted fabric has a slight cooling effect due to the return of water to the surface.

(Comparative Example 3) A 50-denier / 33-filament lyocell fiber was fed to an Italian twisting machine at a spindle speed of 15,000 rpm for a 75-denier / 24-filament polyester fiber at a yarn feeding speed of 10 m / min.
The number of twists was covered under the condition of Z-1500 T / M. The obtained yarn was a multi-layer structure yarn in which the lyocell fiber became the outer layer of 7.6% and the polyester fiber became the inner layer. The multi-layered structure yarn was subjected to a steam heat treatment at 120 ° C. for 20 minutes by an autoclave, and then a sheet knitted fabric was prepared by a 28GG single knitting machine.
A hydrophilic treatment was performed. The basis weight of the sheet knitted fabric is 123 g / m.
^{Was 2} . The knitted fabric was a knitted fabric in which water absorbed from the outer layer hardly transferred to the inner layer and the intermediate layer, the water was retained in the outer layer, and a large amount of water returned to the fabric, giving a sticky feeling.

(Comparative Example 4) A 100th single cotton yarn and a 75 denier / 24 filament polyester processed yarn were twisted at Z-500T / M using a DTB twisting machine of Ishikawa Seisakusho. A jersey knitted fabric was produced with the obtained yarn using a 28GG single knitting machine, and the same knitting, dyeing, and hydrophilizing treatment as in Example 1 was performed on the knitted fabric. The basis weight of the sheet knitted fabric is 130 g
/ M ² . When the yarn of this knitted fabric was enlarged, it was found to be a multilayered yarn in which the polyester fiber was 6.8% outer layer and the cotton yarn was the inner layer. The knitted fabric absorbs water instantaneously, and the absorbed water migrates to the inner layer side of the composite yarn. However, since the water in the inner layer is insufficiently diffused, the water returns to the surface and the sticky feeling is large. It was a knitted fabric. Also, the drying property was poor.

[0030]

[Table 1]

[0031]

As described above, the multilayer structured yarn of the present invention and the multilayer structured fabric made of the yarn are supplied to the surface of the multilayer structured yarn, so that moisture is quickly transferred to the inner layer and / or the intermediate layer. The water is transferred and diffused and held in the inner layer and / or the intermediate layer. Therefore, water is less likely to be wet back on the surface of the multi-layer structure yarn due to external pressure and the like. It is a non-greasy, silky and comfortable yarn for fabric, and has excellent drying properties, and can prevent cold feeling and discomfort during and after wearing.

Claims (2)

[Claims] 1. A multi-layer yarn having two or more layers, wherein the outermost layer is composed of hydrophobic fibers, and at least a part of the inner layer and / or the intermediate layer is composed of lyocell fibers. Multi-layer structure yarn. 2. A multi-layer structure fabric comprising the multi-layer structure yarn according to claim 1.