JP2000178857A - Comfortable knitted fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a comfortable knitted fabric high in antistatistic property, water-absorbing property and moisture absorbing/releasing property. SOLUTION: This knitted fabric is provided with a net structure of 3 layers the surface layer of which is made of modified cross-section polyester filament yarns, the middle layer of which comprises a core sheath composite moisture absorbing/releasing synthetic fiber formed of a core component of a mixture comprising a polyalkylene oxide modified product, obtained by reaction of polyalkylene oxide, polyol and aliphatic diisocyanate compound, and polyamide, and formed of a sheath component of polyamide, and the reverse layer of which is made of a round cross-section polyester filament yarns, wherein the weight ratio of moisture absorbing/releasing synthetic fiber is 30 to 50% based on the knitted fabric.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to antistatic, water absorbing,
The present invention relates to a knitted fabric which has excellent moisture absorption and desorption properties and is suitable for sports clothing materials such as shirts and training wears.

[0002]

2. Description of the Related Art Synthetic fibers are superior to natural fibers such as cotton, hemp and wool in terms of strength, abrasion resistance, dimensional stability, wash and wear, quick drying, and the like. Widely used as. However, synthetic fibers generally have excellent antistatic properties, water absorption performance, and
It does not have moisture absorption and desorption properties, and when worn in the winter, it becomes clinged to by static electricity and adheres to dust, and when worn in the summer, stuffiness and stickiness occur due to sweating, and it is inferior to natural fiber in terms of comfort. Was.

[0003] In order to solve these problems, attempts have conventionally been made to impart antistatic properties and water absorbency to synthetic fibers. For example, a method in which an antistatic agent and a water-absorbing agent are used in combination with a modified cross-section yarn having at least one V-shaped or U-shaped concave portion (Japanese Unexamined Patent Application Publication No.
54-131045, JP-A-52-148218, JP-A-53
JP-A-106848, JP-A-55-122204) and the like are known, but it is possible to impart a certain degree of antistatic property and water absorption performance by these methods. However, these methods were poor in performance and durability, and did not have the moisture absorption performance of natural fibers, and were inferior in comfort when compared to natural fibers.

In order to solve the above problems, synthetic fibers have antistatic properties,
Various attempts have been made to impart water absorption performance and moisture absorption / desorption performance. For example, as a method of imparting the above function to nylon fibers and polyester fibers by post-processing, a method of graft-polymerizing vinyl carboxylic acid using a radical initiator or an electron beam (JP-A-4-146271, JP-A-4-272272) Gazette)
However, this method has various problems such as a decrease in fiber strength due to processing, a hardening of feeling, and a lack of durability of the effect. Also, composite fibers blended with polyalkylxylene glycol during the production of the yarn (Japanese Patent Application Laid-open No.
No. 5214), a hollow fiber made of a fiber-forming polymer having a through groove from the fiber surface to the hollow portion (JP-A-60-37203)
Japanese Patent Application Laid-Open No. 60-167969), and a microporous fiber obtained by alkali-treating a polyester fiber in which an organic sulfonic acid compound is uniformly dispersed has been proposed. However, none of these fibers had a low level of hygroscopicity, and did not satisfy the same level of antistatic properties, water absorbing properties, and moisture absorbing / desorbing properties at the same level. In order to solve these problems, a core-in-sheath type composite fiber (Japanese Patent Application Laid-Open No. 2-99612) has been proposed in which a resin having a water absorption performance of 10% or more is used as a core and a polyester fiber is used as a sheath. I have. However, although this fiber has sufficient water absorption and moisture absorption / desorption performance at the stage of production of the raw yarn, the sheath of the fiber is damaged during dyeing, especially during weight reduction, and the hygroscopic resin as the core component elutes. As a result, there is a problem that the desired water absorption and moisture absorption / release properties are reduced. In this way, the synthetic fiber has sufficient antistatic properties, water absorption ability,
It is very difficult to provide moisture absorption / desorption performance, and no practical example has been found yet.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a knitted fabric having a high antistatic property, a water absorbing ability, and a moisture absorbing / releasing property. It is an important task.

[0006]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems, and has the following construction. That is, the present invention is a knitted fabric having a three-layer structure, in which the surface layer is a modified cross-section polyester filament yarn, the intermediate layer is a hygroscopic synthetic fiber, and the back layer is a round cross-section polyester filament yarn. The weight ratio of the moisture absorbing / releasing synthetic fiber in the knitted fabric is 30 to 50%, and the comfort knitted fabric and the polyolefin obtained by reacting the moisture absorbing / releasing synthetic fiber with a polyalkylene oxide, a polyol and an aliphatic diisocyanate compound. The above-described comfort knitted fabric, which is a core-sheath composite moisture-absorbing and desorbing synthetic fiber composed of a core component composed of a mixture of an alkylene oxide-modified product and a polyamide, and a sheath component composed of a polyamide, is a gist.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail. The knitted fabric of the present invention is a knitted fabric having a three-layer structure of a stitch, a surface layer, an intermediate layer, and a back layer. The surface layer of the knitted fabric of the present invention is composed of a polyester filament yarn having a modified cross section, and the back layer is composed of a polyester filament yarn having a round cross section. The front and back layers are made of polyester filament yarn because the polyester fiber is a hydrophobic fiber, which tends to cause capillary action due to voids between single filaments, and dimensional stability, strength, and color fastness when used as clothing. Because it is excellent. In the present invention,
In order to transfer the water due to perspiration or the like absorbed from the back layer to the surface layer, and to diffuse and diffuse the water in the surface layer, the capillary action is made to work more in the surface layer than in the back layer. In order to provide such a water absorption / diffusion function, in the present invention, the surface layer is formed of a modified section polyester filament yarn, and the back layer is formed of a round section polyester filament yarn. As the irregular cross-sectional shape of the polyester filament yarn of the surface layer, three-lobe, four-lobe, five-lobe, six-lobe, W
Shape, well shape and the like. In addition, the back layer preferably has a single yarn fineness of 1 to 3 denier from the viewpoint of feel. Preferably, it is smaller. Each yarn of the front and back layers may be a flat yarn or a yarn subjected to crimping such as false twist.

In the present invention, the intermediate layer constituting the knitted fabric is made of a hygroscopic fiber in order to give the knitted fabric a high degree of antistatic properties, water absorption and moisture absorption / desorption properties. The moisture-absorbing and releasing synthetic fibers referred to in the present invention are synthetic fibers having a high degree of moisture-absorbing and releasing properties. Such synthetic fibers are prepared by blending a moisture-absorbing and releasing compound with a fiber-forming polymer. A core-sheath composite fiber produced by blending a fiber having a hygroscopic property with a core component or a compound having hygroscopicity and a fiber-forming polymer with a fiber-forming polymer as a core component, and using the fiber-forming polymer as a sheath component. No. Here, as the fiber-forming polymer, nylon 6, nylon 66, nylon 46
And polyamide terephthalate, polyester obtained by copolymerizing a third component with polyethylene terephthalate units, and polyester such as polybutylene terephthalate and polypropylene terephthalate.

The compound having moisture absorption / desorption properties is not particularly limited as long as it has good moisture absorption / desorption properties and a small change in color tone. Polyalkylene oxides, polyols and polyalkylenes obtained by reaction with an aliphatic diisocyanate compound can be used. Oxide modified products are preferably used. As the polyalkylene oxide used as a raw material of the modified polyalkylene oxide, polyethylene oxide, polypropylene oxide and a copolymer of the two, polyols such as ethylene glycol, diethylene glycol, glycols such as propylene glycol, and aliphatic diisocyanates include Although alicyclic diisocyanate is also included, dicyclohexylmethane-4,4'-diisocyanate, 1,6-hexamethylene diisocyanate and the like can be mentioned. When such a modified polyalkylene oxide is used as a compound having hygroscopicity, it is caused by an imide ring formed by a resonance structure between an isocyanate group and an aromatic ring as seen when an aromatic isocyanate compound is used. Yellowing is suppressed, and the fibers do not yellow even after long-term use, and a conjugate fiber having excellent weather resistance can be obtained.

In the present invention, the content of the modified polyalkylene oxide as a compound having a moisture absorbing / releasing property in the moisture absorbing / releasing synthetic fiber is preferably in the range of 0.5 to 60% by weight. If the content of the modified polyalkylene oxide is less than 0.5% by weight, the desired moisture absorption / desorption property may not be obtained, and if the content exceeds 60% by weight, a problem may occur in the spinning properties.

The core / sheath composite ratio in the case of the core / sheath composite fiber varies depending on the polymer or the like to be used.
It is preferably in the range of 85 to 85/15. If the ratio of the core component is smaller than this, the moisture absorption / desorption property is poor, and if the core component is too large, there is a possibility that a problem may occur in the spinnability.

In the present invention, the weight ratio of the hygroscopic synthetic fibers in the knitted fabric is 30 to 50%. If the weight ratio of the hygroscopic synthetic fiber is less than 30%, the desired antistatic property, water absorption, and hygroscopic property cannot be obtained, which is not preferable. On the other hand, if the weight ratio exceeds 70%, the desired antistatic property cannot be obtained. Further, at the time of dyeing, the disperse dye for dyeing the polyester fiber may become contaminated with the moisture-absorbing / desorbing synthetic fiber, or the dyeing fastness may be poor.

In general, in the case of a core-sheath type conjugate fiber containing such a component as a core component, the core component absorbs and swells during dyeing and finishing, especially at the time of weight reduction, so that the sheath yarn of the single yarn fiber is easily generated. However, when polyamide is used for the sheath component,
Even when the above-mentioned polyalkylene oxide-modified product having a large water-absorbing brain is used as the core component, the sheath component polyamide swells to some extent following the water-absorbing swelling action of the core component during the dyeing process, and the difference in water swelling between the two components. As a result, it becomes difficult for the sheath to crack. As the knitting structure in the present invention, all the structures in which the stitches are formed by the front and back stitches, the front and back connection stitches and the back and stitch stitches, such as the hydropile stitch shown in FIG.

[0014]

The knitted fabric according to the present invention not only has a water-absorbing and diffusing function due to the polyester fibers of the surface layer and the back layer, but also has a moisture-absorbing property and an antistatic property, which were difficult to be imparted with conventional synthetic fibers, to the intermediate layer. This is made possible by using a moisture-absorbing and releasing conjugate fiber, and a comfortable wearing feeling without stickiness and stuffiness when worn can be obtained. When a modified polyalkylene oxide is used as the core component of the moisture-absorbing and desorbing conjugate fiber and a polyamide is used as the sheath component, the triboelectric charge of the knitted fabric is small, and the method of JIS L1094 B, which is a level at which dust adheres due to static electricity, occurs. 100
It is also possible to set the voltage to 0 V or less. The reason for this is not clear, but the present inventors think as follows. When looking at the charged series of the polyamide and the polyester of the present invention, the polyamide has a positive charge when static electricity is applied, whereas the polyamide has a negative charge when static electricity is applied to the polyester. There are fibers such as cotton, silk, rayon, acetate, and acryl between the charged trains of these polyamides and polyesters, and upon contact with these fibers, the polyamides once assume a positive charge and the polyesters assume a negative charge. However, it is considered that these charges cancel each other and the charged voltage becomes lower. At this time, the amount of canceling electric charge differs depending on the usage ratio of the moisture absorbing / releasing composite fiber, but it is considered that an excellent electrostatic effect can be obtained within the range of the present invention.

[0015]

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) Moisture absorption / desorption property After drying the sample at 105 ° C. for 2 hours and measuring the weight W ₀ , the sample was conditioned at a temperature of 25 ° C. and a relative humidity of 60% for 2 hours, and the weight W ₁ was measured. According to the following equation (a), the initial moisture content M ₀
Ask for. Next, this sample was subjected to a temperature of 34 ° C and a relative humidity of 90.
% For 24 hours, and then the weight W ₂ was measured.
The moisture content M ₁ is calculated by the following equation (b). Subsequently, the sample was further subjected to 24 hours at 25 ° C and 60% relative humidity.
After standing for a period of time, the weight W ₃ was measured, and the moisture content M after moisture release was measured.
₂ is calculated by the following equation (c). M ₀ (%) = [(W ₁ −W ₀ ) / W ₀ ] × 100 (a) M ₁ (%) = [(W ₂ −W ₀ ) / W ₀ ] × 100 (b) M ₂ (% ) = [(W ₃ −W ₀ ) / W ₀ ] × 100 (c) (2) Water Absorption The weight W of the sample before water absorption obtained by conditioning the sample at 25 ° C. and 60% relative humidity for 2 hours. After weighing, JIS L-1097
The weight W ₆₀ of the water-absorbing sample after one minute is measured by the water-absorbing measurement method specified in 5.3, and the water absorption R is obtained by the following equation. R (%) = [(W ₆₀ −W) / W] × 100 (3) Water-absorbing front and back diffusion area ratio 0.1 cc of an ink solution obtained by diluting a commercially available ink twice with water is dropped on a glass plate. The back side of the knitted fabric was placed on the lower side, that is, the side in contact with the ink liquid. After leaving it for 60 seconds to absorb the ink liquid, it was moved to another glass plate and again left for 3 minutes with its back side down. The diffusion areas of the ink liquid on the front and back surfaces of the sample knitted fabric thus obtained are measured, and the area ratio (surface diffusion area / back surface diffusion area) is calculated from the measured values. (4) Antistatic Property The antistatic property of the stained sample was measured by the following method. Half-life: JIS L1094 A method Friction charge voltage: JIS L1094 B method

Example 1 85 parts by weight of nylon 6 having a relative viscosity of 2.6 measured at a concentration of 0.5 g / dl and a temperature of 20 ° C. in m-cresol solvent were mixed with 85 parts by weight of polyethylene oxide, 1,4-butanediol and dicyclohexylmethane 4,4. A mixture obtained by blending 15 parts by weight of a polyalkylene modified product (35 g of water absorption capacity of 1 g) which is a reaction product of 4 'diisocyanate was used as a core component, and nylon 6 having a relative viscosity of 2.6 was used as a sheath component. Weight ratio is 50
/ 50 core / sheath composite fibers were melt spun. At that time, using a spinneret having a discharge hole of 24 holes, melt spinning at a spinning temperature of 255 ° C., cooled by blowing air at 18 ° C. to the spun yarn, after applying an oil agent, 1300m / Then, the yarn was drawn by 3.0 times and subjected to false twisting to obtain a 75d / 24f core-sheath type moisture absorbing / releasing composite fiber false twisted yarn. Next, the concentration in a mixed solvent of phenol and tetrachloroethane in an equal weight
Polyethylene terephthalate having a relative viscosity of 1.38 measured at 0.5 g / dl and a temperature of 25 ° C. was melt-spun. At that time, using a spinneret having 36 W-shaped cross-section discharge holes, after applying an oil agent, winding up at a speed of 3600 m / min, stretching 1.5 times and performing W-section of 75d / 36f A polyester filament yarn was obtained. Next, the high-orientation undrawn yarn obtained in the same manner except that the above-mentioned polyester filament yarn and round spinneret are used is subjected to draw false twisting, and false twisting of a 75d / 36f round cross-section polyester filament yarn is performed. Yarn was obtained. Next, using a 28-gauge double-sided circular knitting machine, a yarn feeder No. for a surface layer knitted structure having a knitting structure consisting of 7 full yarns shown in FIG.
Polyester multifilament yarns with W cross section in 2,4, yarn feeder No.1,3,6 for middle layer knitting structure, moisture absorbing / releasing composite fiber, polyester multifilament in yarn feeder No.5,7 for back layer knitting structure. The greige machine knitted by arranging false twisted yarns was subjected to scouring, dyeing, water-absorbing processing, and finishing set in accordance with ordinary dyeing processing conditions to obtain a knitted fabric of the present invention having a three-layer structure.

Comparative Example 1 A knitted fabric for comparison was obtained in the same manner as in Example 1 except that the moisture-absorbing / releasing composite fiber constituting the intermediate layer was changed to a nylon 6 multifilament 75d / 24f false twisted yarn. .

Comparative Example 2 Polyester multifilament 75d constituting the surface layer
A knitted fabric for comparison was obtained in the same manner as in Example 1 except that the / 24fW cross-section yarn was changed to a 75d / 24f round cross-section polyester multifilament yarn. Table 1 shows the evaluation results of the obtained knitted articles of Example 1 and Comparative Examples 1 and 2.

[0019]

[Table 1]

As apparent from Table 1, the knitted fabric of Example 1 had excellent antistatic properties, water absorption and moisture absorption / desorption properties, and was suitable as a comfortable clothing material. On the other hand, Comparative Example 1 in which no moisture-absorbing / desorbing conjugate fiber was used was inferior in all of the antistatic properties, water-absorbing properties and moisture-absorbing / desorbing properties.
Comparative Example 2 in which a round cross-section yarn having a small capillary effect was used for the surface layer had excellent antistatic properties but was inferior in water absorption and diffusion characteristics.

Example 2 In Example 1, a water-soluble vinylon filament yarn was used instead of the polyester false twisted yarn at the yarn feeder No. 7 of the double-sided circular knitting machine.
A knitted fabric of the present invention having a three-layer structure as shown in FIG. 2 having a pile on the back surface layer was obtained in the same manner as in Example 1 except that 28 denier was supplied. The obtained knitted fabric had excellent antistatic properties, water absorption and moisture absorption / desorption properties, and was suitable as a comfortable clothing material.

[0022]

When the comfort knitted fabric according to the present invention is used for athletic clothing and the like, the stuffiness due to gas-phase sweating at the initial stage of wearing is reduced, and at the same time, liquid sweating is quickly absorbed and diffused from the skin surface to the surface. By doing so, there is no sticky feeling and sufficient wearing comfort can be obtained.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of how to knit a knitting structure of a knitted fabric of the present invention.

FIG. 2 is a schematic diagram schematically showing an example of a cross-sectional structure of the knitted fabric of the present invention.

[Explanation of symbols]

 No. 1 to 7 knitting needles for knitting the front knitting portion D1 to D8 knitting needles for knitting the back knitting portion a yarn for forming the surface layer b yarn for deforming the intermediate layer c Thread forming the back layer

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4L002 AA06 AB05 AC00 BB01 EA03 FA01 4L041 AA07 AA20 BA02 BA05 BA21 BC01 BC02 BD14 BD20 CA21 DD01 DD18 DD21

Claims (2)

[Claims] 1. A knitted fabric having a three-layer structure, wherein the surface layer has a modified cross-section polyester filament yarn,
A comfort knitted fabric characterized in that the intermediate layer is made of hygroscopic synthetic fibers, the back layer is made of a polyester filament yarn having a round cross section, and the weight ratio of the hygroscopic synthetic fibers in the knit is 30 to 50%. 2. The moisture-absorbing and releasing synthetic fiber comprises a core component composed of a mixture of a polyamide and a modified polyalkylene oxide obtained by reacting a polyalkylene oxide, a polyol and an aliphatic diisocyanate compound, and a sheath component composed of a polyamide. The comfort knitted fabric according to claim 1, which is a core-sheath composite type moisture absorbing / releasing synthetic fiber.