JP2011252244A - Spun yarn used in knitted fabric for clothes excellent in wearing comfortableness, heat retaining property and moisture absorbability - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fabric for clothes that is extremely soft, thin and excellent in wearing comfortableness and has excellent heat retaining property and moisture absorbability.SOLUTION: The spun yarn includes 60 wt.% or more of a cellulose-based short fiber with a single fiber fineness of 0.2-1.0 dtex and an acrylic short fiber with a single fiber fineness of 0.1-1.1 dtex in a weight ratio of 15:85-70:30. The knitted fabric using the spun yarn can achieve a heat insulating ratio of 16-30%, and a coefficient of moisture absorption of 3-15% in a basis weight of 60-130 g/mand a thickness of 0.2-0.7 mm.

Description

  The present invention relates to a spun yarn suitable for obtaining a knitted fabric for clothing that is extremely soft, thin, comfortable to wear, and excellent in heat retention and moisture absorption.

  2. Description of the Related Art Conventionally, in clothing fabrics worn in autumn and winter, studies have been made to improve heat retention to cope with winter cold and to improve comfort during wearing. As a technique for improving the heat retaining property, a device for giving a lot of air having low thermal conductivity in the fabric has been devised. For example, the knitting structure is examined to increase bulkiness, hollow fibers are used to contain air in the fibers, and high shrinkage yarns are used to apply the yarn shrinkage difference after dyeing. However, when the heat retaining property is increased, there is a problem that the knitted fabric becomes thick or the flexibility is lowered and the comfort is deteriorated.

For example, Patent Document 1 proposes a heat insulating knitted fabric in which a front surface layer and a back surface layer are tucked with a binding yarn, and the binding yarn is composed of a hollow fiber. This knitted fabric is improved in heat retention to some extent so that the heat retention α is 18% or more, but the thickness and basis weight of the knitted fabric are not sufficiently satisfactory values. In Patent Document 2, the outer layer is composed of fibers having a single yarn fineness of 0.2 to 3.0 dtex, and at least one layer of the knitted fabric has a stitch density of 45 courses / inch and 45 wales / inch or more, A heat insulating knitted fabric having a ground air permeability of 5 to 50 cc / cm ² · sec and subjected to water absorption processing has been proposed. This knitted fabric has a problem that the knitted fabric becomes heavy because heat retention is obtained by increasing the density using high crimped yarns or high shrinkage yarns.

  Further, as means for increasing the flexibility of the knitted fabric, one using a microfiber has been proposed. For example, in Patent Document 3, a superfine composite fiber suitable for obtaining a superfine fiber woven or knitted fabric having a soft and swelled texture, which is very dense and excellent in color developability, and the superfine composite fiber are disclosed. The manufacturing method of the used super fine fiber woven / knitted fabric is proposed, and Patent Document 4 proposes a fabric suitable for an underwear application that maintains high flexibility even after repeated wearing and washing, and has excellent surface form stability. Yes. However, although it is possible to obtain a flexible fabric by these methods, it is not always comfortable enough for winter clothing due to low heat retention, low hygroscopicity, and thick and uncomfortable fabric. It was not something.

  On the other hand, using microfibers and highly hygroscopic fibers to improve heat retention from an air layer composed of hygroscopic heat generation and fine voids has also been studied. For example, in Patent Document 5, as a spun yarn suitable for clothing that maintains body temperature for a long time, does not easily release heat from the body, and has excellent heat retention, a single yarn fineness of 0.1 to 1.3 dtex is hydrophobic. Contains 40% by mass or more of synthetic fibers, and contains 30% by mass or more of hygroscopic exothermic fibers whose hygroscopic heat generation amount is 15 J / g or more when the environment is changed from 20 ° C., 40% RH to 20 ° C., 90% RH. Spinned yarn has been proposed. However, this method is suitable as a clothing material that maintains heat retention and prevents stuffiness and has less discomfort when worn for a long time, but is thick as a knitted fabric and is not sufficiently soft, so it is not always comfortable to wear. The knitted fabric was not obtained.

  In this way, in the fabric for innerwear in autumn and winter, the conventional technology for obtaining heat retention by taking a lot of air layers by examining the thickness and structure of the knitted fabric and the characteristics of hollow fibers and microfibers tends to increase the thickness. However, it was not satisfactory from the viewpoint of thinness and softness, and it was difficult to make a thin thread because of the material characteristics of the thread count. For this reason, the present condition is that a thin and soft knitted fabric cannot be manufactured, improving heat retention and moisture absorption.

JP 2002-235264 A JP 2002-363443 A JP 09-256225 A JP 2002-294564 A JP 2003-227043 A

  The present invention was invented in view of the current state of the prior art described above, and its purpose is to be extremely flexible, thin and excellent in comfort as a clothing for autumn and winter while having heat retention and moisture absorption. It is an object of the present invention to provide a suitable spun yarn and a knitted fabric using the spun yarn.

  As a result of intensive studies to achieve the above object, the inventors of the present invention have made a spun yarn made using ultrafine cellulose-based short fibers with extremely improved flexibility and made of other ultrafine fibers such as polyester. It has been found that very excellent flexibility can be obtained compared with the spun yarn. However, ultrafine cellulosic short fibers have a low fiber strength and a high moisture content of the fiber, so they have a high feeling of contact cooling and low heat retention. Therefore, it is necessary to produce spun yarn with high heat retention and practical strength. There is a problem that cannot be obtained. Therefore, as a result of further intensive studies, the present inventors have made thin spun yarn using ultrafine cellulose short fibers and ultrafine acrylic short fibers, so that they are soft and thin, yet have heat retention and moisture absorption, and are comfortable. The inventors have found that a spun yarn suitable for a knitted fabric for autumn and winter can be provided, and have completed the present invention.

That is, the present invention has the following configurations (1) to (4).
(1) Weight ratio of 15:85 to 70:30 of cellulose short fibers having a single fiber fineness of 0.2 to 1.0 dtex and acrylic short fibers having a single fiber fineness of 0.1 to 1.1 dtex A spun yarn characterized by containing at least 60% by weight.
(2) The spun yarn according to (1), wherein the number of fibers is 70 to 250.
(3) A knitted fabric for clothing, comprising 50% by weight or more of the spun yarn according to (1) or (2).
(4) basis weight is 60~130g / ^{m 2,} a thickness of 0.2 to 0.7 mm, heat retention is 16 to 30%, wherein the moisture absorption rate is 3% to 15% The knitted fabric for clothing described in (3).

  The spun yarn of the present invention contains specific ultra-fine cellulose short fibers and ultra-fine acrylic short fibers in a specific ratio, so it is soft and comfortable to wear (feel), is thin, light and not bulky, and keeps warm. Therefore, it is possible to suitably provide a knitted fabric satisfying the comfortable performance required for comfortable clothing for autumn and winter, particularly the inner material. The spun yarn of the present invention has practical strength and is excellent in spinnability and knitting.

The knitting structure (single bag, smooth) used in the examples is shown. The cross-sectional photograph of the spun yarn of Example 2 is shown.

  The spun yarn of the present invention contains 60% by weight or more of cellulose short fibers having a single fiber fineness of 0.2 to 1.0 dtex and acrylic short fibers having a single fiber fineness of 0.1 to 1.1 dtex. The weight ratio of the cellulose short fibers and the acrylic short fibers is 10:90 to 70:30. The spun yarn of the present invention is capable of spinning a thin and soft yarn by using the two types of ultrafine fibers as described above, and has high heat retention and moisture absorption.

  Examples of the cellulose short fibers used in the spun yarn of the present invention include regenerated cellulose fibers, semi-synthetic fibers, solvent-spun cellulose fibers, natural fibers represented by cotton and hemp. Of these, regenerated cellulose fibers or solvent-spun cellulose fibers are preferred. Examples of the regenerated cellulose fiber include cupra ammonium rayon, viscose rayon, polynosic rayon, and high wet modulus rayon. The solvent-spun cellulose fiber is obtained by spinning a spinning stock solution obtained by dissolving pulp in a specific solvent by a specific means. Specifically, it was obtained after dissolving pulp in a solvent such as N-methylmorpholine-N-oxide, dimethyl sulfoxide, N-methylpiperidine-N-oxide, dimethylacetamide, and removing impurities by filtration. The fiber can be obtained by dry spinning or wet spinning the spinning dope. Examples of solvent-spun cellulose fibers include lyocell and tencel.

  The single fiber fineness of the cellulosic short fibers is 0.2 to 1.0 dtex, preferably 0.3 dtex to 0.9 dtex, more preferably 0.3 dtex to 0.8 dtex, and still more preferably 0.3 dtex to 0.7 dtex. It is. When the short fiber fineness is less than the above range, the color density when dyeing is extremely lowered, and it becomes difficult to obtain uniform dyeability of the blended yarn. When the above range is exceeded, it becomes difficult to spin fine yarn and the texture becomes hard.

  The acrylic short fibers used for the spun yarn of the present invention are preferably made of an acrylonitrile polymer containing 50% by weight or more of acrylonitrile. When the acrylonitrile-based polymer contains 50% by weight or more of acrylonitrile, it may be an acrylonitrile homopolymer, but in terms of economy, it is a copolymer of acrylonitrile and an unsaturated monomer copolymerizable with acrylonitrile. A copolymer containing 95% by weight is desirable. When the content of acrylonitrile is less than 50% by weight, characteristics as acrylic fibers such as dyeing vividness and color developability are not exhibited, and other physical properties such as thermal characteristics tend to be lowered.

  Examples of unsaturated monomers copolymerizable with acrylonitrile include methyl acrylate, ethyl acrylate, isopropyl acrylate, n-butyl acrylate, 2-ethylhexyl acrylate, 2-hydroxyethyl acrylate, and hydroxypropyl acrylate. Acrylic acid ester, ethyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, t-butyl methacrylate, n-hexyl methacrylate, cyclohexyl methacrylate, lauryl methacrylate, 2-hydroxyethyl methacrylate, methacryl Methacrylic acid ester such as hydroxypropyl acid, diethylaminoethyl methacrylate, acrylic acid, methacrylic acid, maleic acid, itaconic acid, acrylamide, N-methylolacrylamido , Diacetone acrylamide, styrene, vinyl toluene, vinyl acetate, vinyl chloride, vinylidene chloride, vinyl bromide, vinylidene bromide, vinyl fluoride, include unsaturated monomers such as vinylidene fluoride.

  Further, monomers that can be copolymerized for the purpose of improving dyeability and the like include p-sulfophenyl methallyl ether, methallyl sulfonic acid, allyl sulfonic acid, styrene sulfonic acid, 2-acrylamido-2-methylpropane sulfonic acid, and these Alkali metal salts and the like.

  The molecular weight of the acrylonitrile-based polymer is not particularly limited as long as it is within the range usually used for the production of acrylic fibers, but if the molecular weight is too low, the spinnability tends to deteriorate and the yarn quality of the raw yarn tends to deteriorate, If the molecular weight is too high, the polymer concentration that gives the optimum viscosity to the spinning dope tends to be low, and the productivity tends to decrease, so it is appropriately selected according to the spinning conditions.

  The method for producing the acrylic short fibers is not particularly limited. For example, the acrylic short fibers can be produced by a wet spinning method in which an acrylonitrile polymer containing 50% by weight or more of acrylonitrile is dissolved in a solvent to form a spinning dope and spinning. Examples of the solvent used for spinning include dimethylacetamide, dimethylformamide, dimethylsulfoxide, organic solvents such as ethylene carbonate, propylene carbonate, γ-butyrolactone, and acetone, and inorganic solvents such as nitric acid, sodium rhodanate, and zinc chloride. .

  The single fiber fineness of the acrylic short fiber is 0.1 to 1.1 dtex, preferably 0.1 to 0.9 dtex, more preferably 0.1 to 0.7 dtex, and still more preferably 0.1 to 0.6 dtex. It is. When the short fiber fineness is less than the above range, the color density when dyeing is extremely lowered, and it becomes difficult to obtain uniform dyeability of the blended yarn. When the above range is exceeded, it becomes difficult to spin fine yarn and the texture becomes hard.

  The mixing ratio of the cellulose short fibers and the acrylic short fibers in the spun yarn of the present invention is 15:85 to 70:30, preferably 20:80 to 70:30, more preferably 30:70 to wt. 70:30, more preferably 35:65 to 65:35. If the mixing ratio of the cellulose short fibers is out of the above range, flexibility cannot be obtained and the target hygroscopicity cannot be obtained. If the mixing ratio exceeds the above range, the hygroscopicity is increased, but the heat retaining property is lowered. Further, the blending ratio of the cellulose short fibers and the acrylic short fibers in the spun yarn is 60% by weight or more, more preferably 70% by weight or more, and further preferably 80% by weight or more. When the blending ratio is less than the above range, it is difficult to obtain the desired heat retention and moisture absorption.

  The number of fibers constituting the spun yarn of the present invention is preferably 70 to 250. The number of constituents may be set in consideration of the fineness of the constituent fibers. However, when the number is less than 70, the necessary number of constituent yarns is insufficient, so that the yarn strength is low and the spinnability may be deteriorated. If it exceeds 1, the yarn count becomes thicker than the 60th count, and there is a possibility that the lightweight and thin knitted fabric targeted by the present invention cannot be obtained.

  The fineness of the spun yarn of the present invention is preferably an English count of 60 to 200, more preferably 70 to 120, and even more preferably 70 to 100. When the count is thicker than the above range, it becomes difficult to obtain a thin, light and warm knitted fabric which is the object of the present invention. On the other hand, if it is thinner than the above range, the knitted fabric becomes too thin, the heat retaining property is lowered, and the fabric strength cannot be achieved based on the standard. The twist coefficient (K) of the spun yarn of the present invention is preferably 3.0 to 4.5, more preferably 3.2 to 4.0. When the twist coefficient is less than the above range, the texture becomes soft, but the yarn strength is lowered, the spinnability and the knitting property are deteriorated, and the production becomes difficult. On the other hand, if the above range is exceeded, the spinning property and the knitting property are improved, but the texture becomes hard. Spinning methods that can be used in the present invention include ring spinning, MVS, hollow spindle spinning, etc. Particularly, ring spinning has high yarn strength, good yarn quality, easy fine count, and versatility. Since it is high, it is preferable.

The knitted fabric made of the spun yarn of the present invention is characterized by being thin, light and flexible while being excellent in heat retention and moisture absorption. Therefore, the knitted fabric of the present invention has a basis weight of preferably 60 to 130 g / m ² , more preferably 80 to 100 g / m ² , and a thickness of preferably 0.2 to 0 as an indicator of thin and light features. 0.7 mm, more preferably 0.3 to 0.6 mm. If the basis weight is less than the above range, warmth cannot be obtained, and if it exceeds the above range, it will exceed the category of light knitted fabrics intended by the present invention. In addition, if the thickness is less than the above range, it becomes too thin to feel the warmth, and if it exceeds the above range, it falls outside the range of the thin fabric intended by the present invention.

  The knitted fabric of the present invention is not particularly limited in the knitted structure, but should be considered so that the thickness is reduced. For example, the knitted fabric of the present invention may be a circular knit single knit, double knit, or warp knitting. As a structure suitable for a structure in which the thickness of the knitted fabric is not easily increased, there are a milling cutter, a single bag, a tengu, a Milan rib, a reversible, a bear tengu, a bear milling, and the like. In order to obtain a thin and light material, it is preferable to set these knitting structures to an appropriate density. The appropriate density varies depending on the knitting structure, but may be set as appropriate within a range of 25 to 40 / inch wales and 35 to 60 / inch courses. The knitted fabric using the spun yarn of the present invention can achieve a heat retention rate of 16 to 30% and a moisture absorption rate of 3 to 15% while having the above-mentioned basis weight and thickness.

  In the knitted fabric of the present invention, other yarns can be knitted in a range where the blend ratio of the blended yarn does not fall below 60% by weight. However, in this case, it is preferable that the yarn used for maintaining the thin and light characteristics is a thin yarn of 80 or more in terms of English count. The knit yarn is not particularly limited as long as it is a fine yarn of 80 count or more. For example, a filament of 50 dtex or less, a spun yarn or a composite yarn is preferably used. As other yarns to be knitted, there are specifically nylon or polyester filaments or false twisted yarns, and short elastic fibers or covered elastic yarns composed of long fibers and elastic fibers. As the coated elastic yarn, FTY (filament twisted yarn) in which a filament and an elastic yarn are twisted, a single (double) covering yarn, an air covered yarn, a false twist composite yarn that is mixed simultaneously with false twist processing, and the like are used. . As the composite yarn of the short fiber and the elastic yarn, a core spun yarn, a pliers or the like is used. As the elastic yarn, polyurethane-based spandex, polyolefin-based elastic yarn, polyester-based elastic yarn, polyester-based latent crimped yarn, or the like can be used. The fineness of the elastic yarn is preferably 22 dtex or less. When the fineness exceeds 22 dtex, the fineness of the mixed yarn becomes large or the balance with the inelastic yarn to be mixed becomes worse. It is better to make the draft ratio of the elastic yarn at the time of blending a low magnification of 1.8 to 2.8 times. More preferably, it is about 1.8 to 2.2 times. When the elastic yarn draft ratio exceeds the above range, the expansion / contraction power is too strong and the shrinkage of the knitted fabric increases, making it difficult to obtain a thin and light knitted fabric. When it is less than the above range, the stretch back becomes insufficient, and a phenomenon that does not stretch back in the lateral direction when worn as an inner occurs. Also, in the manufacture of FTY, there are many yarn breaks, making stable production difficult.

  For example, in the knitted fabric of the present invention, nylon-coated elastic yarns of 66 dtex or less can be knitted at a ratio of 40% by weight or less. Preferably, a polyurethane elastic yarn of 20 dtex or less and a nylon filament are used as a nylon-coated elastic yarn of 44 dtex or less, and these are knitted to form a single bag. In this case, the burst strength is 250 to 350 kPa.

  The dyeing process of the knitted fabric of the present invention may be an ordinary acrylic fiber or a method of processing a mixed knitted fabric with other fibers, but care should be taken not to crush the inter-fiber void structure of the spun yarn of the present invention. It is necessary to process. For example, it is required not to process the knitted fabric with tension or compression in the thickness direction more than necessary during drying or heat treatment. In addition, when the liquid temperature is lowered after scouring or dyeing, the acrylic fiber will drip if done rapidly, so the temperature should be lowered slowly.

  The knitted fabric of the present invention is preferably provided with a general finishing agent such as a softening agent or an antistatic agent, and other various functional processings may be applied alone or in combination. Examples of functional processing include, but are not limited to, antifouling processing such as hydrophilic processing, UV cut processing, electrostatic processing, skin care processing, and the like.

  The knitted fabric using the spun yarn of the present invention has a low bending rigidity and is very soft. Even if the thickness is small, the knitted fabric has a high heat retention and a good hygroscopicity. As for the bending rigidity of the knitted fabric of the present invention, the average value of the bending rigidity (B value) of KES is 0.001 to 0.005, more preferably 0.001 to 0.003, More preferably, it is 0.001 to 0.002. The knitted fabric of the present invention has a heat retention rate in the range of 16% to 30%, and more preferably 18 to 30%. Further, the hygroscopicity is 3% to 15%, and more preferably 6 to 15%.

  Next, the present invention will be specifically described using examples and comparative examples, but the present invention is not limited to these examples. Changes in these embodiments are included in the technical scope of the present invention without departing from the spirit of the present invention. In addition, the measuring method of the characteristic value used by this invention is as follows.

<Short fiber fineness>
The short fiber fineness of the raw cotton used was measured in accordance with the micronaire method of the cotton fiber test method of JIS-L-1019-6.4.1.

<Fineness of spun yarn>
It measured according to the cotton count measurement method of the positive amount tex / count measurement of the general spun yarn test method of JIS-L-1095-9.4.1.

<Heat retention rate>
Using a thermolab II manufactured by Kato Tech, set the BT-BOX BT plate (hot plate) to 35 ° C, assuming a human skin temperature, in an environment of 20 ° C and 65% RH. And measure the power consumption W when the amount of heat transfer is balanced. Further, the power consumption amount W0 under the condition where no sample is placed is measured. The heat retention rate is calculated by the following formula.
Thermal insulation rate (%) = {(W0−W) / W0} × 100
The BT plate has a size of 10 cm × 10 cm, but the sample has a size of 20 cm × 20 cm. Usually, the sample is contacted with a hot plate, and the heat retention rate of the present invention is measured by providing a spacer such as a fired polystyrene having a heat insulating property on the hot plate and providing a gap of 5 mm from the sample.

<Thickness of knitted fabric>
It measured according to the thickness of the knitted fabric test method of JIS-L-1018-6.5.

<Weight of knitted fabric>
It measured according to the basis weight of the remarks of the test method of knitted fabric of JIS-L-1018-6.4.2.

<Bending stiffness of knitted fabric>
The bending stiffness value (B) of the warp / width average of the fabric was evaluated by a KES-FB2 method using a pure bending tester manufactured by Kato Tech. The number of measurements of the length and width was n = 3, and the average of the length and width was taken as the value of bending stiffness. The measurement environment is 20 ± 2 ° C. and 65 ± 2% RH.

<Strength of spun yarn>
It was measured according to “Single Yarn Tensile Strength” in the test method for general spun yarn of JIS-L-1095-9.5.1. The test conditions were measured using a constant speed extension type.

<The number of fibers constituting the spun yarn taken out from the knitted fabric, the fiber mixture ratio, the single fiber fineness>
The blended yarn is taken out from the knitted fabric, and the material mixture ratio and yarn count are measured for each yarn type. The yarn count is measured by a cotton count measuring method of JIS-L1095-9.4. For the material mixture ratio measurement, each method of the JIS-L1030 fiber product mixture ratio test method is appropriately used. Regarding the number of constituent fibers, the cross section of the spun yarn is photographed using the resin embedding method and the number of constituents is counted. In the embedding method, one spun yarn is straightened and embedded with an epoxy resin, and a cross section of the yarn is cut at right angles to the fiber axis using a microtome. A photograph is taken of a fiber cross section cut out by an optical microscope. The number of fibers forming the yarn cross section in this photograph is counted visually. The average value of the number of measurements n = 20 was defined as the number of fiber components. The resin embedding may be performed using a general method for taking a fiber cross-sectional photograph. Further, when the fiber type cannot be determined only by the shape and fineness, it can be determined by color after dyeing. After the measurement, the fineness of each fiber is calculated according to the yarn count, the material mixture ratio and the number of the yarns.

<Rupture strength of knitted fabric>
The burst strength was measured according to the JIS-L-1018 burst strength A method.

<Hygroscopicity of knitted fabric>
It was measured according to the moisture content method of the knit fabric test method of JIS-L-1018-8.6.

<Spinning>
Judgment was made based on the number of yarn breakage of the spinning machine (pieces / 400 spindles / hour).
The evaluation criteria were 0 to 5 (good), 6 to 10 (somewhat bad), and 10 or more (bad).

<Knitting>
The knitting machine was evaluated for the number of stops (times / 6 kg) during knitting of 6 kg of knitted fabric.
The evaluation criteria were 0 to 3 times (good), 4 to 7 times (somewhat bad), and 8 times or more (bad).

Example 1
Extra fine type rayon short fiber (Daiwabo Rayon bright type (BH) 0.6 dtex, fiber length 32 mm) 20% by weight, extra fine type acrylic short fiber (Japan Exlan Industrial UF8-0.3T type, 0.3 dtex, (Fiber length 32 mm) 80% by weight was blended with an OHARA blender and then made into a card sliver using a card machine manufactured by Ishikawa Seisakusho. did. Further, this sliver was passed through a Toyoda Automatic Loom Co., Ltd. to produce a 60 gelen / 15 yd roving. Then, using a ring spinning machine manufactured by Toyota Industries Corporation, spinning was performed at a draft of 40 times and a traveler rotation speed of 9000 rpm to obtain a spun yarn of English count 80's. The twist coefficient (K) at that time was 3.8 (twist number 34 T / inch), and the number of fiber components was 219. Using this spun yarn and a covering machine manufactured by Kashiwagi Co., Ltd., Toyobo's polyurethane fiber ESPAR (registered trademark) type T71, 17 dtex was drafted at a draft of 2.2 times, and Toyobo's polyamide fiber Silfine (registered trademark) Nylon FTY17T / 28T obtained by covering 28dtex-30f with a semi-dull cross section at 550T / M twist number and spindle rotation speed 8000r / m to knitting 18 ″ -18G milling machine (Nagata) A single bag was knitted by Seiki). The knitting conditions were knitting yarn length, the short fiber spun yarn was 430 mm / 100 wale, and the FTY was 230 mm / 100 W. The knitting structure of the single bag of Example 1 is shown in FIG.

The obtained raw machine was refined under the following conditions.
Using a liquid dyeing machine NS type manufactured by Nisaka Seisakusho, the knitted fabric was not opened but scoured under the processing conditions and scouring recipe described below. After three times of hot water washing and one time of water washing, the knitted fabric was taken out from the dyeing machine, centrifuged and dehydrated, and then dried (120 ° C. × 3 minutes) using a shrink surfer dryer made by Hirano Techseed.
Treatment conditions: bath ratio 1:15, 95 ° C. × 30 minutes Scouring prescription: Scouring agent (Neugen HC manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) 1 g / l, sequestering agent (Neocrystal GC1000 manufactured by Nikka Chemical Co., Ltd.) ) 1g / l, soda ash 0.5g / l
Attention was paid to the tension so that the knitted fabric would not stretch in the warp direction during drying.

Next, using a liquid dyeing machine NS type manufactured by Nisaka Manufacturing Co., Ltd., dyeing rayon with reactive dye, soaping and neutralizing, followed by dispersive cationic dye (acrylic) and acid dye (nylon) in the same bath It was dyed, soaped and washed in hot water. After that, it was softened in the bath, taken out from the dyeing machine, dehydrated and dried. Each dyeing condition and prescription are shown below.
<Reactive dyeing>
Dyeing conditions: bath ratio 1:10, dyeing temperature 60 ° C. × 60 minutes, dyeing reaction dye (Sumitix Supra BLUE BRF manufactured by Sumika Chemtex Co., Ltd.) 1% owf
Softener in bath (Persophthal MAX) 2g / L
Anhydrous salt glass (manufactured by Tosoh Corporation) 30g / L
Alkaline agent (MS171 manufactured by Meisei Chemical Industry Co., Ltd.) 5g / L
<Cation / acid dyeing>
Dyeing conditions: bath ratio 1:15 95 ° C. × 45 minutes Dyeing recipe: pH adjuster (acetic acid 0.2 g / l, dye bath adjusted to pH = 4)
Leveling agent (Disper TL manufactured by Meisei Chemical Industry Co., Ltd.) 1g / l
Dispersion type cationic dye (Nippon Kayaku Kayacryl light Blue 4GSL-ED) 1.0% owf
Acid dye (Nippon Kayaku Kayanol Blue NR) 1.0% owf
Flexible treatment: Clariant Sand Palm MEJ-50 Liquid 1.0% owf

After drying, the fabric was opened and set with a tenter to adjust the quality, and finally a knitted fabric with a basis weight of 100 g / m ² was obtained. A knitted fabric having a surface knitted fabric density of 36 wales (W) / inch and 45 courses (C) / inch when the surface having a rough density was used as a table was obtained. Table 1 shows details and evaluation results of the spun yarn and the knitted fabric of Example 1.

Example 2
A spun yarn of English count 80's was obtained in the same manner as in Example 1 except that the ultrafine type rayon short fiber and the ultrafine type acrylic short fiber of Example 1 were changed to 50% by weight and 50% by weight, respectively. Obtained. The number of fiber components at this time was 183. This yarn and nylon FTY were knitted and dyed in the same manner as in Example 1 to obtain a knitted fabric. Table 1 shows the details and evaluation results of the spun yarn and the knitted fabric of Example 2. Moreover, the cross-sectional photograph of the spun yarn of Example 2 is shown in FIG.

Example 3
A spun yarn with an English count of 80's was obtained in the same manner as in Example 1 except that the ultrafine type rayon short fiber and the ultrafine type acrylic short fiber in Example 1 were changed to 60% by weight and 40% by weight, respectively. Obtained. The number of fiber components at this time was 171. This yarn and nylon FTY were knitted and dyed in the same manner as in Example 1 to obtain a knitted fabric. The details and evaluation results of the spun yarn and the knitted fabric of Example 3 are shown in Table 1.

Example 4
The same procedure as in Example 1 was conducted except that the ultrafine type rayon short fiber and the ultrafine type acrylic short fiber of Example 1 were mixed at 20% by weight and 60% by weight, respectively, and cotton (Supima) was mixed at 20% by weight. A spun yarn of the formula number 80's was obtained. The number of fiber components at this time was 182. This yarn and nylon FTY were knitted and dyed in the same manner as in Example 1 to obtain a knitted fabric. The details and evaluation results of the spun yarn and the knitted fabric of Example 4 are shown in Table 1.

Example 5
Same as Example 1 except that 50% by weight of ultra-fine fine rayon short fibers (DHWABORAYON BH0.3T type, 0.3 dtex, fiber length 32 mm) and 50% by weight of ultrafine acrylic short fibers of Example 1 were blended. In this way, a spun yarn of English count 80's was obtained. The number of fiber components at this time was 244. This yarn and nylon FTY were knitted and dyed in the same manner as in Example 1 to obtain a knitted fabric. Table 1 shows details and evaluation results of the spun yarn and the knitted fabric of Example 5.

Example 6
The English style was the same as in Example 1 except that 50% by weight of rayon short fibers (BH 0.9T type, Daiwabo Rayon BH 0.9T type, fiber length 38 mm) and 50% by weight of the ultrafine acrylic short fibers of Example 1 were blended. A spun yarn having a count of 80's was obtained. The number of fiber components at this time was 163. This yarn and nylon FTY were knitted and dyed in the same manner as in Example 1 to obtain a knitted fabric. Table 1 shows details and evaluation results of the spun yarn and the knitted fabric of Example 6.

Example 7
Example 1 except that 50% by weight of rayon staple fiber (DHWABO Rayon BH0.9T type, 0.9 dtex, fiber length 38 mm) and 50% by weight of ultrafine acrylic staple fiber (0.1 dtex, fiber length 38 mm) are blended. Similarly, a spun yarn with an English count of 80's was obtained. The number of fiber components at this time was 371. This yarn and nylon FTY were knitted and dyed in the same manner as in Example 1 to obtain a knitted fabric. Table 1 shows details and evaluation results of the spun yarn and the knitted fabric of Example 7.

Example 8
Example 1 except that 50% by weight of rayon short fibers (DHWABO Rayon BH0.9T type, 0.9 dtex, fiber length 38 mm) and 50% by weight of ultrafine acrylic short fibers (0.5 dtex, fiber length 38 mm) are blended. Similarly, a spun yarn with an English count of 80's was obtained. The number of fiber components at this time was 134. This yarn and nylon FTY were knitted and dyed in the same manner as in Example 1 to obtain a knitted fabric. The details and evaluation results of the spun yarn and the knitted fabric of Example 8 are shown in Table 1.

Example 9
Example 1 except that 50% by weight of rayon short fibers (BH 0.9T type manufactured by Daiwabo Rayon, 0.9 dtex, fiber length 38 mm) and 50% by weight of acrylic short fibers (1.0 dtex, fiber length 38 mm) were blended. In this way, a spun yarn of English count 80's was obtained. The number of fiber components at this time was 78. This yarn and nylon FTY were knitted and dyed in the same manner as in Example 1 to obtain a knitted fabric. Table 1 shows details and evaluation results of the spun yarn and the knitted fabric of Example 9.

Example 10
The ultrathin type rayon short fiber of Example 1 was grafted to obtain a modified rayon having a graft rate of 18% and a moisture absorption rate of 18%. The formulation for grafting is shown below.
<Graft processing prescription>
Methacrylic acid monomer (Mitsubishi Gas Chemical) 45% owf
Chelating agent (Cyrest NTB made by Kirest) 0.45%
Sulfuric acid (60 ° Be) 0.72% owf
Ferrous ammonium sulfate (Wako Pure Chemical Industries) 0.45% owf
35% hydrogen peroxide solution 4.5% owf
It processed at 80 degreeC * 120 minutes by the bath ratio 1: 9.4 using the over Meyer dyeing machine.
Thereafter, neutralization and oiling treatment was performed and the mixture was subjected to spinning.
Example 1 except that 20% by weight of ultrafine type rayon short fiber of Example 1, 50% by weight of ultrafine type acrylic short fiber of Example 1 and 30% by weight of the above modified grafted rayon were blended. Similarly, a spun yarn with an English count of 80's was obtained. The number of fiber components at this time was 183. This yarn and nylon FTY were knitted and dyed in the same manner as in Example 1 to obtain a knitted fabric. Table 1 shows details and evaluation results of the spun yarn and the knitted fabric of Example 10.

Example 11
Mixing 50% by weight of rayon staple fiber (DAIWABO RAYON BH0.9T type, 0.9dtex, fiber length 38mm) and 50% by weight of ultrafine acrylic staple fiber (0.3dtex, fiber length 38mm) s spun yarn was obtained. The number of fiber components at this time was 163. Using this yarn, smooth was knitted by a 30 ″ -22G double knit knitting machine (Fukuhara Seiki). The knitting condition is a knitting yarn length of 240 mm / 100 wale. The smooth knitting structure of Example 11 is shown in FIG. Next, a knitted fabric was obtained by dyeing in the same manner as in Example 1. Table 1 shows details and evaluation results of the spun yarn and the knitted fabric of Example 11.

Comparative Example 1
50% by weight of regular rayon fiber (RB type made by Daiwabo Rayon, 1.4 dtex, fiber length 38 mm) and 50% regular type acrylic short fiber (K8-1.3T type, 1.3 dtex, fiber length 38 mm by Nippon Exlan Industries) An English count 80's was obtained in the same manner as in Example 1 except that the blending was carried out by weight%. The number of fiber components at this time was 54. This yarn and nylon FTY were knitted and dyed in the same manner as in Example 1 to obtain a knitted fabric. Table 1 shows details and evaluation results of the spun yarn and the knitted fabric of Comparative Example 1.

Comparative Example 2
Other than blending 50% by weight of regular rayon fibers (RB type made by Daiwabo Rayon, 1.4 dtex, fiber length 38 mm) and 50% by weight of regular acrylic short fibers (manufactured by Nippon Exlan, 1.0 dtex, fiber length 38 mm) Obtained the English count 80's in the same manner as in Example 1. The number of fiber components at this time was 62. This yarn and nylon FTY were knitted and dyed in the same manner as in Example 1 to obtain a knitted fabric. Table 1 shows details and evaluation results of the spun yarn and the knitted fabric of Comparative Example 2.

Comparative Example 3
50% by weight of ultra-fine rayon short fiber (DAIWABO RAYON BH0.9T type, 0.9 dtex, fiber length 38 mm), regular type acrylic short fiber (Nippon Exlan Industrial K8-1.3T type, 1.3 dtex, fiber length 38 mm) English count 80's was obtained in the same manner as in Example 1 except that 50 wt% was blended. The number of fiber components at this time was 69. This yarn and nylon FTY were knitted and dyed in the same manner as in Example 1 to obtain a knitted fabric. The details and evaluation results of the spun yarn and the knitted fabric of Comparative Example 3 are shown in Table 1.

Comparative Example 4
50% by weight of regular rayon fiber (RB type made by Daiwabo Rayon, 1.4 dtex, fiber length 38 mm) and 50% regular type acrylic short fiber (K8-1.3 type, 1.3 dtex, fiber length 38 mm by Nippon Exlan Industries) An English count 100's was obtained in the same manner as in Example 1 except for blending with wt%. The number of fiber components at this time was 44. This yarn and nylon FTY were knitted and dyed in the same manner as in Example 1 to obtain a knitted fabric. The details and evaluation results of the spun yarn and the knitted fabric of Comparative Example 4 are shown in Table 1.

Comparative Example 5
An English count 80's was obtained in the same manner as in Example 1 except that the ultrafine type rayon short fiber and the ultrafine type acrylic short fiber of Example 1 were changed to a mixing ratio of 80% by weight and 20% by weight, respectively. The number of fiber components at this time was 147. This yarn and nylon FTY were knitted and dyed in the same manner as in Example 1 to obtain a knitted fabric. The details and evaluation results of the spun yarn and the knitted fabric of Comparative Example 5 are shown in Table 1.

Comparative Example 6
An English count 80's was obtained in the same manner as in Example 1 except that the ultrafine type rayon short fiber and the ultrafine type acrylic short fiber of Example 1 were changed to a mixing ratio of 10% by weight and 90% by weight, respectively. The number of fiber components at this time was 233. This yarn and nylon FTY were knitted and dyed in the same manner as in Example 1 to obtain a knitted fabric. The details and evaluation results of the spun yarn and the knitted fabric of Comparative Example 6 are shown in Table 1.

  As is clear from the evaluation results in Table 1, the knitted fabric obtained from the spun yarns of Examples 1 to 11 has all of the heat retention rate, moisture absorption rate, flexibility (bending rigidity), fabric strength, spinnability, and knitting property. However, those of Comparative Examples 1 to 6 had a problem in any of the characteristics.

  The spun yarn of the present invention contains specific ultra-fine cellulose short fibers and ultra-fine acrylic short fibers in a specific ratio, so it is soft and comfortable to wear (feel), is thin, light and not bulky, and keeps warm. Comfortable autumn and winter clothing can be suitably provided because of its properties and hygroscopicity.

Claims (4)

  Cellulose short fibers having a single fiber fineness of 0.2 to 1.0 dtex and acrylic short fibers having a single fiber fineness of 0.1 to 1.1 dtex in a weight ratio of 15:85 to 70:30 are 60 weights. A spun yarn characterized by containing at least%.   The spun yarn according to claim 1, wherein the number of fibers is 70 to 250.   A knitted fabric for clothing comprising 50% by weight or more of the spun yarn according to claim 1 or 2. Basis weight is 60~130g / ^{m 2,} a thickness of 0.2 to 0.7 mm, heat retention is 16 to 30% claim 3, wherein the moisture absorption rate is 3% to 15% The knitted fabric for clothing described in 1.