JP2009167565A - Stretchable knitted fabric, method for producing the same, and textile product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stretchable knitted fabric having characteristic soft and slimy feeling of ultrafine fiber and excellent stretchability, a method for producing the knitted fabric and a textile product of the fabric. <P>SOLUTION: The knitted fabric is composed of a combined filament yarn comprising a polyester filament yarn A having a single fiber diameter of 10-1,000 nm and a polyester filament yarn B having a single fiber diameter of 1-20 μm and an elastic yarn. A textile product such as inner wear and sportswear is produced from the knitted fabric as necessary. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a stretch knitted fabric having a soft and slimy texture peculiar to ultrafine fibers and excellent stretch properties, a method for producing the same, and a textile product.

  Conventionally, in applications such as apparel and inner apparel, especially sports apparel, in addition to functional requirements, lightness, compactness, touch and comfort when worn, etc. have been demanded. Fiber has been proposed. For example, by making synthetic fibers such as polyester into nanofibers, it becomes possible to impart textures and functions that could not be obtained with conventional fibers, and they are being developed extensively (for example, patent documents) 1, Patent Document 2, Patent Document 3, and Patent Document 4).

  However, when the knitted fabric is knitted using nanofibers, the fiber stiffness is small because the single fiber diameter is very small.As a result, the original stretchability of the knitted fabric is lacking, and the quality is deteriorated due to significant shrinkage. There was a problem that workability and handling were bad, such as winding around a dyeing machine. As a result, there is also a problem that the unique texture of the nanofiber is impaired.

  Under such a background, the present inventor in Japanese Patent Application No. 2007-093079 has a soft and slimy texture and stretchability unique to ultrafine fibers using ultrafine fibers and fibers of a specific fineness. Although a knitted fabric has been proposed, it has been found that there is a need for a knitted fabric having even better stretch properties depending on the application.

JP 2003-41432 A JP 2004-162244 A JP-A-2005-23466 JP 2007-2364 A

  The present invention has been made in view of the above background, and its purpose is not only to exhibit a soft and slimy texture peculiar to ultra-fine fibers, but also to a stretch knitted fabric having excellent stretch properties, and a method for producing the same. To provide textile products.

  As a result of intensive studies to achieve the above-mentioned problems, the present inventor obtained a knitted fabric by using a mixed fiber composed of a superfine fiber and a filament yarn having a specific fineness, and an elastic yarn. The present inventors have found that a stretch knitted fabric having not only a soft and slimy texture peculiar to fibers but also an excellent stretch property can be obtained, and further intensive studies have led to the completion of the present invention.

  Thus, according to the present invention, “including a mixed yarn composed of a polyester filament yarn A having a single fiber diameter of 10 to 1000 nm and a polyester filament yarn B having a single fiber diameter of 1 to 20 μm, and an elastic yarn. A characteristic stretch knitted fabric is provided.

  At that time, the number of filaments of the polyester filament yarn A is preferably 500 or more. The number of filaments of the polyester filament yarn B is preferably in the range of 1 to 300. The polyester filament yarn B is preferably contained in an amount of 10 to 50% by weight based on the total weight of the mixed yarn. Moreover, it is preferable that the blended yarn and the elastic yarn are included in the knitted fabric as a composite yarn.

In the stretch knitted fabric of the present invention, the basis weight of the knitted fabric is preferably 300 gr / m ² or less. Moreover, it is preferable that the elongation recovery rate of the knitted fabric is 80% or more. The average friction coefficient of the knitted fabric surface is preferably 1.5 or more.

  Further, according to the present invention, “a sea-island type composite fiber formed of a sea component and an island component made of polyester and having a diameter of 10 to 1000 nm; and a polyester filament yarn B having a single fiber fineness of 0.1 to 5 dtex” Characterized in that, after obtaining a blended yarn by using the blended yarn and an elastic yarn, a knitted fabric is knitted, and the sea component of the sea-island type composite fiber is dissolved and removed with an alkaline aqueous solution. A method for producing a stretch knitted fabric ".

  In that case, it is preferable that the total fineness of the sea-island type composite fiber is within a range of 1 to 100 dtex. Moreover, it is preferable that the total fineness of the said polyester filament yarn B exists in the range of 1-100 dtex. Moreover, it is preferable that the boiling water shrinkage of the said polyester filament yarn B is 10% or more.

  In addition, according to the present invention, sportswear, outerwear, innerwear, swimwear, men's clothing, women's clothing, yukata, work clothing, protective clothing, artificial leather, footwear, heels, using the stretch knitted fabric described above. A textile product selected from the group consisting of a hat, gloves, socks, bedding, curtains, car seats, wiping tools, and beauty tools is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the stretchable knitted fabric which has not only the soft and slimy texture peculiar to a microfiber but also the outstanding stretch property, its manufacturing method, and a textile product are obtained.

Hereinafter, embodiments of the present invention will be described in detail.
First, in the polyester filament yarn A (hereinafter, also referred to as “nanofiber”), the single fiber diameter (diameter of the single fiber) is within a range of 10 to 1000 nm (preferably 100 to 800 nm). It is essential. When the single fiber diameter is converted into a single fiber fineness, it corresponds to 0.000001 to 0.01 dtex. When the single fiber diameter is smaller than 10 nm, the fiber strength is lowered, which is not preferable for practical use. On the contrary, when the single fiber diameter is larger than 1000 nm, the knitted fabric may not exhibit the texture unique to the ultrafine fibers, which is not preferable. Here, when the cross-sectional shape of the single fiber is an atypical cross section other than the round cross section, the diameter of the circumscribed circle is defined as the single fiber diameter. The single fiber diameter can be measured by photographing the cross section of the fiber with a transmission electron microscope.

  In the polyester filament yarn A, the number of filaments is not particularly limited, but it is preferably 500 or more (more preferably 2000 to 10,000) in order to obtain a texture peculiar to ultrafine fibers. The total fineness of the polyester filament yarn A (the product of the single fiber fineness and the number of filaments) is preferably in the range of 5 to 150 dtex.

  The fiber form of the polyester filament yarn A is not particularly limited, but is preferably a long fiber (multifilament yarn). The cross-sectional shape of the single fiber is not particularly limited, and may be a known cross-sectional shape such as a circle, a triangle, a flat shape, or a hollow shape. In addition, normal air processing and false twist crimping may be applied.

  The type of polymer forming the polyester filament yarn A is not particularly limited as long as it is a polyester polymer. Polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polylactic acid, stereocomplex polylactic acid, and third component are copolymerized. Preferred examples include polyesters and the like. Such polyester may be material recycled or chemically recycled polyester. Furthermore, the polyester obtained using the catalyst containing the specific phosphorus compound and titanium compound which are described in Unexamined-Japanese-Patent No. 2004-270097 and 2004-21268 may be sufficient. In the polymer, a fine pore forming agent, a cationic dye dyeing agent, an anti-coloring agent, a heat stabilizer, a fluorescent whitening agent, a matting agent, a coloring agent may be added as necessary within the range not impairing the object of the present invention. 1 type (s) or 2 or more types of an agent, a hygroscopic agent, and inorganic fine particles may be contained.

  On the other hand, it is important that the polyester filament yarn B has a single fiber diameter in the range of 1 to 20 μm. When the single fiber diameter is smaller than 1 μm, the original stretchability of the knitted fabric is impaired and the workability and handleability may be deteriorated, as in the case where the knitted fabric is composed of only ultrafine fibers. On the contrary, if the single fiber diameter is larger than 20 μm, the peach touch-like unique texture of the ultrafine fiber may be impaired, which is not preferable. Here, when the cross-sectional shape of the single fiber is an atypical cross section other than the round cross section, the diameter of the circumscribed circle is defined as the single fiber diameter. The single fiber diameter can be measured by photographing the cross section of the fiber with a transmission electron microscope, as described above.

  In the polyester filament yarn B, the number of filaments is not particularly limited, but is preferably in the range of 1 to 300. The fiber form of the polyester filament yarn B is not particularly limited, but is preferably a long fiber (multifilament yarn). The cross-sectional shape of the single fiber is not particularly limited, and may be a known cross-sectional shape such as a circle, a triangle, a flat shape, or a hollow shape. In addition, normal air processing and false twist crimping may be applied.

  The type of polymer that forms the polyester filament yarn B is not particularly limited as long as it is a polyester polymer, and includes polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polylactic acid, stereocomplex polylactic acid, and the third component. Preferred examples include polymerized polyester. Such polyester may be material recycled or chemically recycled polyester. Furthermore, the polyester obtained using the catalyst containing the specific phosphorus compound and titanium compound which are described in Unexamined-Japanese-Patent No. 2004-270097 and 2004-21268 may be sufficient. In particular, a copolyester is particularly preferable in that it has a high boiling water shrinkage as described later. In the polymer, a fine pore forming agent, a cationic dye dyeing agent, an anti-coloring agent, a heat stabilizer, a fluorescent whitening agent, a matting agent, a coloring agent may be added as necessary within the range not impairing the object of the present invention. 1 type (s) or 2 or more types of an agent, a hygroscopic agent, and inorganic fine particles may be contained.

  In the present invention, the blended yarn is composed of the polyester filament yarn A and the polyester filament yarn B. At that time, other fibers may be contained as long as they are 30% by weight or less based on the total weight of the mixed yarn. The form of the mixed fiber is not particularly limited, and a mixed yarn obtained by air-mixing the polyester filament yarn A and the polyester filament yarn B with an interlace air nozzle or the like, a covering yarn obtained by covering one around the other, A twisted yarn or a spun yarn may be used. Among these, the core-sheath type mixed yarn in which the polyester filament yarn A is disposed in the sheath portion and the polyester filament yarn B is disposed in the core portion is preferable. As described above, the ultrafine fibers having a single fiber diameter of 10 to 1000 nm are arranged in the sheath portion, and the polyester filament having the single fiber diameter in the range of 1 to 20 μm is arranged in the core portion. In addition to exhibiting a unique texture, the knitted fabric has a predetermined rigidity, so that the original stretchability of the knitted fabric is not impaired, and the workability and handleability are excellent.

  The stretch knitted fabric of the present invention includes the above-mentioned mixed yarn and elastic yarn. At this time, as such elastic yarn, polybutylene terephthalate as a hard segment, polyoxyethylene glycol as a soft segment, a water-absorbing polyether ester elastic yarn made of a polyether ester elastomer, polybutylene terephthalate as a hard segment, and polytetraethylene Preferable examples include non-water-absorbing polyether ester elastic yarns and polyurethane elastic yarns made of polyether ester elastomers containing methylene oxide glycol as soft segments.

In the stretch knitted fabric of the present invention, the mixed yarn and the elastic yarn may be included as a composite yarn, or both may be included by being aligned, or both may be knitted. Also good.
Among these, the mixed yarn and the elastic yarn are preferably included as a composite yarn, and a covering yarn obtained by covering the mixed yarn around the elastic yarn is particularly preferable. In addition, if it is 50 weight% or less with respect to the total weight of a stretch knitted fabric, other fibers may be contained.

  The stretch knitted fabric of the present invention can be produced, for example, by the following production method. First, a sea-island type composite fiber (a fiber for polyester filament yarn A) formed of a sea component and an island component composed of polyester and having a diameter of 10 to 1000 nm is prepared. As such a sea-island type composite fiber, a sea-island type composite fiber multifilament (100 to 1500 islands) disclosed in Japanese Patent Application Laid-Open No. 2007-2364 is preferably used.

  That is, as the sea component polymer, polyester, polyamide, polystyrene, polyethylene and the like having good fiber forming properties are preferable. For example, as an easily soluble polymer in an alkaline aqueous solution, polylactic acid, an ultra-high molecular weight polyalkylene oxide condensation polymer, a polyethylene glycol compound copolymer polyester, a copolymer polyester of polyethylene glycol compound and 5-sodium sulfonic acid isophthalic acid may be used. Is preferred. Among them, a polyethylene terephthalate copolymer polyester having an intrinsic viscosity of 0.4 to 0.6 obtained by copolymerizing 6 to 12 mol% of 5-sodium sulfoisophthalic acid and 3 to 10% by weight of polyethylene glycol having a molecular weight of 4000 to 12000. Is preferred.

  On the other hand, the island component polymer is preferably a polyester such as a fiber-forming polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polylactic acid, or a polyester obtained by copolymerizing a third component. In the polymer, a fine pore forming agent, a cationic dye dyeing agent, an anti-coloring agent, a heat stabilizer, a fluorescent whitening agent, a matting agent, a coloring agent may be added as necessary within the range not impairing the object of the present invention. 1 type (s) or 2 or more types of an agent, a hygroscopic agent, and inorganic fine particles may be contained.

  The sea-island composite fiber composed of the sea component polymer and the island component polymer preferably has a sea component melt viscosity higher than that of the island component polymer during melt spinning. Further, the diameter of the island component needs to be in the range of 10 to 1000 nm. At this time, if the diameter is not a perfect circle, the diameter of the circumscribed circle is obtained. In the sea-island composite fiber, the sea-island composite weight ratio (sea: island) is preferably in the range of 40:60 to 5:95, and particularly preferably in the range of 30:70 to 10:90.

  Such sea-island type composite fiber multifilament yarn can be easily manufactured by the following method, for example. That is, melt spinning is performed using the sea component polymer and the island component polymer. As the spinneret used for melt spinning, any one such as a hollow pin group for forming an island component or a group having a fine hole group can be used. The discharged sea-island type cross-section composite fiber multifilament yarn is solidified by cooling air and is preferably wound after being melt spun at 400 to 6000 m / min. The obtained undrawn yarn is made into a composite fiber having desired strength, elongation, and heat shrinkage properties through a separate drawing process, or is taken up by a roller at a constant speed without being wound once, and subsequently drawn. Any of the methods of winding after passing through may be used. In such sea-island type composite fiber multifilament yarn, the single yarn fiber fineness, the number of filaments, and the total fineness are within the range of single yarn fiber fineness of 0.5 to 10.0 dtex, the number of filaments of 5 to 75, and the total fiber of 30 to 170 dtex, respectively. It is preferable that In addition, the boiling water shrinkage of the sea-island type composite fiber multifilament yarn is preferably in the range of 5 to 30%.

  On the other hand, a polyester filament B having a single fiber fineness of 0.1 to 5 dtex is prepared. In order to make the single fiber diameter of the polyester filament yarn B in the finally obtained knitted fabric 1 to 20 μm, it is important to set the single fiber fineness within the above range. Moreover, when the boiling water shrinkage rate of the polyester filament B is larger than that of the sea-island type composite fiber, it is preferable that a core-sheath structure in which the polyester filament yarn B is located at the core portion is obtained by the heat treatment described later.

  In the polyester filament yarn B, the number of filaments and the total fineness are preferably in the range of 1 to 300 filaments and the total fineness of 0.1 to 5 dtex, respectively. Moreover, it is preferable that the boiling water shrinkage of the filament yarn is within a range of 10% or more (more preferably 20 to 40%). In order to obtain such a high boiling water shrinkage rate, it is preferable to spin and stretch the copolymer polyester using a conventional method. At that time, as the copolyester, the main constituent monomers of the copolyester are terephthalic acid and ethylene glycol, and the third component copolymerized with this main constituent monomer is isophthalic acid, naphthalenedicarboxylic acid, adipic acid, sebacic acid. , Diethylene glycol, polyethylene glycol, bisphenol A, and bisphenol sulfone. In particular, the copolyester is a copolyester in which the acid component is composed of terephthalic acid and isophthalic acid having a molar ratio (terephthalic acid / isophthalic acid) of 90/5 to 85/15, and the glycol component is composed of ethylene glycol. Is preferred. By using such a copolyester, a high boiling water shrinkage can be obtained.

  Next, a mixed yarn is obtained by mixing the sea-island type composite fiber filament yarn and the polyester filament yarn B by a conventional method. At that time, the method for mixing fibers is not particularly limited, and examples thereof include air mixing using an air nozzle such as an interlace nozzle, composite false twisting, combined twisting, covering processing, etc., and air mixing using an interlace nozzle among others. Is particularly preferred. The total fineness ratio of the sea-island type composite fiber filament yarn and the polyester filament yarn B is preferably in the range of 90:10 to 50:50.

  Next, a knitted fabric is knitted by a conventional method using the mixed yarn and the elastic yarn. At that time, the mixed yarn and the elastic yarn may form a composite yarn as described above. The knitting structure of the knitted fabric is not particularly limited, and may be a weft knitted fabric (circular knitted fabric) or a warp knitted fabric. Examples of the weft knitting structure include flat knitting, rubber knitting, double-sided knitting, pearl knitting, tuck knitting, floating knitting, one-sided knitting, lace knitting, splicing knitting, etc. Examples include, but are not limited to, a single atlas knitting, a double cord knitting, a half knitting, a half base knitting, a satin knitting, a half tricot knitting, a back hair knitting, and a jacquard knitting. The number of layers may be a single layer or a multilayer of two or more layers.

  Next, the knitted fabric is treated with an alkaline aqueous solution, and the sea components of the sea-island composite fiber are dissolved and removed with an alkaline aqueous solution, whereby the sea-island composite fiber filament yarn is converted to a polyester multifilament yarn A having a single fiber diameter of 10 to 1000 nm. To do. At that time, the alkaline aqueous solution treatment may be performed at a temperature of 55 to 65 ° C. using a 3 to 4% NaOH aqueous solution.

  In addition, by performing heat treatment on the knitted fabric before and / or after dissolution and removal with the alkaline aqueous solution, the polyester filament yarn B in the mixed yarn is located in the core in the knitted fabric, while the single fiber diameter is 10 to 10%. A core-sheath structure in which 1000 nm polyester filament yarn A is located in the sheath is formed. Here, the heat treatment may be a heat treatment in a normal dyeing finishing process, and may be a wet heat (or dry heat) treatment before the dyeing process and / or a wet heat treatment during the dyeing process and / or a dry heat treatment after the dyeing process. .

  In addition, conventional brushed processing, water repellent processing, and various functions that provide functions such as ultraviolet ray shielding or antistatic agents, antibacterial agents, deodorants, insect repellents, phosphorescent agents, retroreflective agents, negative ion generators, etc. Processing may be additionally applied.

The basis weight of the knitted fabric is 300 g / m ² or less (more preferably 200 g / m ² or less, particularly preferably 70 to 150 g / m ² ), when used as underwear (inner wear) or sports wear. Good adhesion between skin and knitted fabric is preferable. The density of the knitted fabric is preferably in the range of 50 to 150 courses / 2.54 cm and 40 to 120 wales / 2.54 cm.

The stretch knitted fabric thus obtained includes a mixed yarn and an elastic yarn composed of a polyester filament yarn A having a single fiber diameter of 10 to 1000 nm and a polyester filament yarn B having a single fiber diameter of 0.1 to 20 μm. Is included, it not only exhibits a soft and slimy texture peculiar to ultra-fine fibers, but also has excellent stretch properties. As such knitted fabric stretchability, it is preferable that the elongation recovery rate is 80% or more (preferably 80 to 120%). However, the elongation recovery rate is measured by the following method. That is, using a constant speed extension type tensile tester with a self-recording device, an initial load of 196.1 mN (20 gf) is applied, the grip interval is 10 cm, and the tensile speed is 30 cm / min up to 14.7 N (1.5 kgf) constant load. After stretching, leave for 1 minute. Then return to the original position at the same speed. After standing for 3 minutes, the residual elongation (up to 0.01 cm) is measured with a scale. This operation is repeated 5 times with the same test cloth, and the average value of the elongation recovery rate (%) is calculated from the drawn load-elongation curve by the following formula and rounded to one decimal place.
E (%) = ((L−L1) / L) × 100
Where E: elongation recovery rate, L = constant elongation (mm), L1 = residual elongation (mm)

  Further, in the stretch knitted fabric of the present invention, it is preferable that the average friction coefficient of the knitted fabric surface is 1.5 or more because of good adhesion to the skin. However, the average friction coefficient is measured by the following method. That is, after attaching a sample to a wooden head having a bottom area of 5 × 8 cm, a height of 3 cm, and a weight of 100 g, the head was placed on a smooth base laid with silicon rubber, and a constant speed extension type tensile tester with a self-recording device was used. The head is moved at a moving speed of 100 mm / min, an average value of moving distances of 10 mm to 150 mm is measured, and a numerical value divided by 100 is calculated. A knitted fabric having such an average friction coefficient can be obtained by increasing the proportion of the polyester filament yarn A exposed on the knitted fabric surface.

  Next, the textile product of the present invention is a sportswear, outerwear, innerwear, swimwear, men's clothing, women's clothing, yukata, work clothing, protective clothing, artificial leather, footwear, using the stretch knitted fabric described above. A textile product selected from the group consisting of: heels, hats, gloves, socks, bedding, curtains, car seats, wiping tools, and beauty tools. Sport wear or inner wear is particularly preferable. Since the above-mentioned polyester knitted fabric is included in such a textile product, it has not only a soft and slimy texture peculiar to ultrafine fibers but also excellent stretch properties.

  Next, although the Example and comparative example of this invention are explained in full detail, this invention is not limited by these. In addition, each measurement item in an Example was measured with the following method.

<Dissolution rate> Each of the sea and island polymers is wound up at a spinning speed of 1,000 to 2,000 m / min with a 0.3φ-0.6L × 24H die, and the residual elongation is 30-60. % Filaments were drawn to produce 84 dtex / 24 fil multifilaments. The weight reduction rate was calculated from the dissolution time and the dissolution amount at a bath ratio of 100 at the temperature at which the solvent was dissolved in each solvent.

<Boiling water shrinkage>
The test filament yarn is wound 10 times around a measuring machine with a circumference of 1.125 m to prepare a skein, and this skein is suspended from a hanging nail of a scale plate, and the bottom end of the skein hanging Then, a load 1/30 of the total mass of the skein was applied, and the length L1 of the skein before the shrinkage treatment was measured.
Remove the load from this skein, put the skein into a cotton bag, take out the cotton bag containing this skein from boiling water, take out the skein from this cotton bag, absorb the water contained in the skein with filter paper, This was air-dried at room temperature for 24 hours. The air-dried skein is hung on a hanging nail of the scale plate, and the lower part of the skein is applied with a load of 1/3 of the total mass of the skein, and the length of the skein after the shrinkage treatment is applied. L2 was measured. And the boiling water shrinkage | contraction rate (BWS) of the test filament yarn was computed by the following formula.
BWS (%) = ((L1-L2) / L1) × 100

<Elongation recovery rate>
Using a constant speed extension type tensile tester with a self-recording device, an initial load of 196.1 mN (20 gf) was applied, and the gripping interval was 10 cm, and the tensile speed was 30 cm / min to 14.7 N (1.5 kgf) constant load. Then leave it for 1 minute. Then return to the original position at the same speed. After standing for 3 minutes, the residual elongation (up to 0.01 cm) was measured with a scale.
This operation was repeated 5 times with the same test cloth, and the average value of the elongation recovery rate (%) was calculated from the drawn load-elongation curve by the following formula and rounded to one decimal place.
E (%) = ((L−L1) / L) × 100
Where E: elongation recovery rate, L = constant elongation (mm), L1 = residual elongation (mm)

<Average friction coefficient>
After mounting the sample on a wooden head with a bottom area of 5 x 8 cm, a height of 3 cm, and a weight of 100 g, place the head on a smooth base covered with silicone rubber, and use a constant speed extension type tensile tester with a self-recording device to move the speed. The head was moved at 100 mm / min, the average value over a moving distance of 10 mm to 150 mm was measured, and the value divided by 100 was calculated.

<Processability>
Three testers visually judge the fabric after the dyeing process, and the grade 3: the fabric has no wrinkles and is a satisfactory grade. The second grade: normal, the first grade: the fabric has a lot of wrinkles and the grade is unsatisfactory. Evaluation was made in three stages.

<Texture>
Three testers sensory-evaluate the texture of the knitted fabric surface. Grade 3: Presents a soft and slimy texture peculiar to ultra-fine fibers (nanofibers) Grade 2: Normal Grade 1: Texture peculiar to ultra-fine fibers It was evaluated in three grades.

<Single fiber diameter>
After the knitted fabric was photographed with an electron microscope, the single fiber diameter was measured with an n number of 5, and the average value was obtained.

[Example 1]
Using polyethylene terephthalate as the island component, polyethylene terephthalate copolymerized with 6 mol% of 5-sodium sulfoisophthalic acid and 6% by weight of polyethylene glycol having a number average molecular weight of 4000 as the sea component (dissolution rate ratio (sea / island) = 230), A sea-island type composite unstretched fiber having sea: island = 30: 70 and number of islands = 836 was melt-spun at a spinning temperature of 280 ° C. and a spinning speed of 1500 m / min, and wound up once. The obtained undrawn yarn was roller-drawn at a drawing temperature of 80 ° C. and a draw ratio of 2.5 times, and then heat-set at 150 ° C. and wound up. The obtained sea-island type composite drawn yarn was 56 dtex / 10 fil and the cross section of the fiber was observed with a transmission electron microscope TEM. As a result, the shape of the island was round and the diameter of the island was 700 nm.

  Next, a high-shrinkage copolymer polyester filament yarn (Teijin) formed by spinning and drawing the drawn yarn, and a copolymer polyester comprising terephthalic acid and isophthalic acid having a molar ratio of 93/7 and an glycol component comprising ethylene glycol. Fiber Co., Ltd., with a total fineness of 33 dtex / 12 fill, boiling water shrinkage of 65%, round cross section), and using a well-known interlace nozzle, entangled with each other to obtain 89 dtex / 22 fill polyester multifilament mixed yarn. It was.

  Next, the mixed yarn and the polyurethane monofilament yarn (Operontex Co., Ltd., total fineness 33 dtex / 1 fil) are aligned, and a 28G, 90 inch tricot warp knitting machine (KS4SU, KARL MAYER, Germany) is used. Knitting a single layer tricot knitted fabric of half structure, and the resulting knitted fabric was wet heat-treated at 90 ° C, 160 ° C dry heat set as a preset, 3.5% NaOH aqueous solution, 30% alkali at 70 ° C After the weight reduction, high-pressure dyeing was performed at 130 ° C. for 30 minutes, and a dry heat set at 170 ° C. was performed as a final set.

  When the surface of the fabric and the cross section of the obtained knitted fabric were observed with a scanning electron microscope SEM, the sea component was completely dissolved and removed, and the contracted yarn (polyester filament yarn B, single fiber diameter 15 μm) was mixed yarn. It was confirmed that the polyester filament yarn A (nanofiber, single fiber diameter: 700 nm) was evenly spread so as to surround it while being located in the center portion of.

In the obtained knitted fabric, the basis weight was 144 g / m ² , the density of the knitted fabric was 110 courses / 2.54 cm, 81 wales / 2.54 cm, the average elongation recovery rate was 91.5%, and the average friction coefficient was 1. 8 was excellent in elongation recovery rate and adhesion.
Moreover, there was no wrinkle in the dough and the quality was satisfactory (grade 3). Moreover, the texture peculiar to a super fine fiber was exhibited (3rd grade).

  When the underwear was sewed and worn using such a knitted fabric, it had a soft and slimy texture peculiar to nanofibers, had good skin followability and adhesion, and was extremely excellent in wearing comfort. Moreover, when washing, dehydration, and tumbler drying were performed using a general washing machine, the form did not collapse and the texture was excellent.

[Example 2]
The blended yarn obtained in Example 1 was used as a polyurethane monofilament yarn (manufactured by Operontex Co., Ltd., total fineness 22 dtex / 1 fil) using DR = 2.0, twisting number 500 times / M with a known covering device. After creating the covering yarn using a 28G, 30-inch circular knitting machine (XL-3FA manufactured by Fukuhara Seiki Seisakusho Co., Ltd.), a single-layer circular knitted fabric with a tengu structure was knitted. Wet heat treatment, dry heat set at 160 ° C as a preset, 3.5% NaOH aqueous solution, 30% alkali reduction at 70 ° C, high pressure dyeing at 130 ° C for 30 minutes, and dry heat at 170 ° C as the final set Set.

  When the surface of the fabric and the cross section of the obtained knitted fabric were observed with a scanning electron microscope SEM, the sea component was completely dissolved and removed, and the contracted yarn (polyester filament yarn B, single fiber diameter 15 μm) was mixed yarn. It was confirmed that the polyester filament yarn A (nanofiber, single fiber diameter: 700 nm) was evenly spread so as to surround it while being located in the center portion of.

In the obtained knitted fabric, the basis weight was 170 g / m ² , the density of the knitted fabric was 100 courses / 2.54 cm, 95 wales / 2.54 cm, the average elongation recovery rate was 88.8%, and the average friction coefficient was 1. 8 was excellent in elongation recovery rate and adhesion.
Moreover, there was no wrinkle in the dough and the quality was satisfactory (grade 3). Moreover, the texture peculiar to a super fine fiber was exhibited (3rd grade).

  When T-shirts (sportswear) are sewn and worn using such a knitted fabric, it has a soft and slimy texture unique to nanofibers, has good skin follow-up and adhesion, and is very comfortable to wear. It was excellent. Moreover, when washing, dehydration, and tumbler drying were performed using a general washing machine, the form did not collapse and the texture was excellent.

[Comparative Example 1]
Using a 28G, 33 inch (1 inch = 2.54 cm) circular knitting machine (LPJ25 manufactured by Fukuhara Seiki Co., Ltd.) using only the mixed yarn obtained in Example 1, a circular knitted fabric having a smooth structure was obtained. After knitting, the obtained knitted fabric was wet-heat treated at 90 ° C., and then the amount of alkali was reduced by 30% at 70 ° C. with a 3% NaOH aqueous solution in order to remove sea components of the sea-island type composite drawn yarn. Thereafter, high-pressure dyeing was performed at 130 ° C. for 30 minutes, and a dry heat setting at 170 ° C. was performed as a final set.

In the obtained knitted fabric, the basis weight was 121 g / m ² , 43 courses / 2.54 cm, 54 wales / 2.54 cm, the average elongation recovery rate was 73.7%, and the elongation recovery rate was inferior to that of Example 1. It was. Further, the average friction coefficient of the knitted fabric was 3.1, which was excellent in adhesion.
Moreover, there was no wrinkle in the dough and the quality was satisfactory (grade 3). Moreover, the texture peculiar to a super fine fiber was exhibited (3rd grade).

  When such a knitted fabric was used to sew and wear a T-shirt (sportswear), it was light and excellent in water absorption, had a unique peach touch tone, and was very excellent in wearing comfort. Moreover, when washing, dehydration, and tumbler drying were performed using a general washing machine, the form did not collapse and the texture was excellent.

[Comparative Example 2]
Using a 28G, 30-inch circular knitting machine (XL-3FA manufactured by Fukuhara Seiki Co., Ltd.) using the mixed yarn obtained in Example 1, a single-layer circular knitted fabric with a tengu tissue was knitted and obtained. The knitted fabric was wet-heat treated at 90 ° C., 3% NaOH aqueous solution, reduced by 30% alkali at 70 ° C., and then subjected to high-pressure dyeing at 130 ° C. for 30 minutes.

In the obtained knitted fabric, the basis weight was 73 g / m ² , 52 courses / 2.54 cm, 49 wales / 2.54 cm, the average elongation recovery was 75.6%, and the average friction coefficient was 2.1 and excellent in adhesion. The elongation recovery rate was inferior to that of Example 1.
Moreover, there was no wrinkle in the dough and the quality was satisfactory (grade 3). Moreover, the texture peculiar to a super fine fiber was exhibited (3rd grade).

[Comparative Example 3]
The same procedure as in Example 1 was performed except that only the sea-island type composite drawn yarn 56 dtex / 10 fil obtained by using the same sea-island polymer as in Example 1 was used.
In the obtained knitted fabric, the weight per unit area was 44 g / m ² , 36 courses / 2.54 cm, 108 wales / 2.54 cm, and the average elongation recovery rate was 50.4%, which was inferior in elongation recovery. The average coefficient of friction of the knitted fabric was 1.5, but the fabric had many lines and wrinkles, and sufficient quality was not obtained (first grade).

[Comparative Example 4]
Example 1 was repeated except that ordinary polyethylene terephthalate filament yarn (manufactured by Teijin Fibers Ltd., total fineness 84 dtex / 24 fill, round cross section) was used.
In the obtained knitted fabric, the weight per unit area was 105 g / m ² , 50 courses / 2.54 cm, 53 wales / 2.54 cm, and the average elongation recovery rate was 89%, but the average friction coefficient was 0.2 and adhesion. It was inferior to. In addition, the texture of the fabric was hard and satisfactory quality was not obtained (first grade).

[Comparative Example 5]
Example 3 was repeated except that ordinary polyethylene terephthalate filament yarn (manufactured by Teijin Fibers Ltd., total fineness: 84 dtex / 24 fill, round cross section) was used.
In the obtained knitted fabric, the basis weight was 181 g / m ² , 115 courses / 2.54 cm, 84 wales / 2.54 cm, and the average elongation recovery rate was 92.6%, but the average friction coefficient was 0.1. The adhesion was inferior. Moreover, the cloth was thick and the texture was hard, and satisfactory quality was not obtained (first grade).

[Comparative Example 6]
The sea-island type composite stretched yarn 56 dtex / 10 fill obtained using the same sea-island polymer as in Example 1 and ordinary polyethylene terephthalate filament yarn (manufactured by Teijin Fibers Ltd., total fineness 33 dtex / 12 fill, round cross section) are aligned, Using a known interlace nozzle, a blended fiber was entangled to obtain a 89 dtex / 22 fill polyester multifilament blended yarn.

  When the surface of the fabric and the cross section of the obtained knitted fabric were observed with a scanning electron microscope SEM, the sea component was completely dissolved and removed, but the core-sheath structure of the blended yarn was not formed, and the polyethylene terephthalate filament It was confirmed that the yarn (single fiber 15 μm) appeared on the surface of the knitted fabric.

In the obtained knitted fabric, the weight per unit area was 58 g / m ² , the elongation recovery rate in the vertical direction was 73%, and the elongation recovery rate in the horizontal direction was 46%. In addition, the spreadability was poor, the fabric did not swell, the texture was hard, and a peach-like texture with a unique slimy feeling was not obtained (first grade).

  ADVANTAGE OF THE INVENTION According to this invention, the stretchable knitted fabric which has not only the soft and slimy texture peculiar to a microfiber, but the outstanding stretch property, its manufacturing method, and a textile product are provided, The industrial value is extremely It ’s big.

Claims (13)

  A stretch knitted fabric characterized by comprising a mixed yarn composed of a polyester filament yarn A having a single fiber diameter of 10 to 1000 nm and a polyester filament yarn B having a single fiber diameter of 1 to 20 µm, and an elastic yarn.   The stretch knitted fabric according to claim 1, wherein the number of filaments of the polyester filament yarn A is 500 or more.   The stretch knitted fabric according to claim 1 or 2, wherein the number of filaments of the polyester filament yarn B is in the range of 1 to 300.   The stretch knitted fabric according to any one of claims 1 to 3, wherein the polyester filament yarn B is contained in an amount of 10 to 50% by weight based on the total weight of the mixed yarn.   The stretch knitted fabric according to any one of claims 1 to 4, wherein the mixed yarn and the elastic yarn are included in the knitted fabric as a composite yarn. The stretch knitted fabric according to any one of claims 1 to 5, wherein the basis weight of the knitted fabric is 300 gr / m ² or less.   The stretch knitted fabric according to any one of claims 1 to 6, wherein the stretch recovery rate of the knitted fabric is 80% or more.   The stretch knitted fabric according to any one of claims 1 to 7, wherein an average friction coefficient of the knitted fabric surface is 1.5 or more.   A mixed yarn is obtained using a sea-island type composite fiber formed of a sea component and an island component made of polyester and having a diameter of 10 to 1000 nm and a polyester filament yarn B having a single fiber fineness of 0.1 to 5 dtex. After that, a knitted fabric is knitted using the mixed yarn and elastic yarn, and the sea component of the sea-island type composite fiber is dissolved and removed with an alkaline aqueous solution. Manufacturing method.   The method for producing a stretch knitted fabric according to claim 9, wherein the sea-island composite fiber has a total fineness in a range of 1 to 100 dtex.   The manufacturing method of the stretch knitted fabric of Claim 9 or Claim 10 whose total fineness of the said polyester filament yarn B exists in the range of 1-100 dtex.   The manufacturing method of the stretch knitted fabric in any one of Claims 9-11 whose boiling water shrinkage rate of the said polyester filament yarn B is 10% or more.   Sportswear, outerwear, innerwear, swimwear, men's clothing, women's clothing, yukata, work clothing, protective clothing, artificial leather, footwear, comprising the stretch knitted fabric according to any one of claims 1 to 8. Any textile product selected from the group consisting of bags, hats, gloves, socks, bedding, curtains, car seats, wipes, and beauty tools.