JP2009161883A - Method for producing fabric and resultant fabric, and textile product comprising the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a fabric exhibiting soft and slimy touch feeling peculiar to extra-ultrafine fiber fabrics and having stretchability as well, to provide the resultant fabric, and to provide a textile product comprising the fabric. <P>SOLUTION: The method for producing the fabric includes the following process: Sea-island-type conjugate fibers each composed of a sea component of readily soluble polymer and an island component of sparingly soluble polymer with the island component diameter being 10-1,000 nm in the single fiber cross section are subjected to false-twist crimping processing, and a fabric is obtained using the resultant false-twist crimping-textured yarns, and then the sea component of the sea-island-type conjugate filament yarns is dissolved off by an aqueous alkali solution to obtain the objective fabric. The fabric thus obtained is processed optionally into the textile product such as innerwear or sportswear. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for producing a fabric using a sea-island type composite fiber formed of a sea component and an island component having a diameter of 10 to 1000 nm, a fabric produced by the production method, and the fabric. This is related to textile products.

  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 ultra-fine fibers from synthetic fibers such as polyester, it becomes possible to impart textures and functions that could not be obtained with conventional fibers, and they are being developed extensively (for example, patents). Reference 1, Patent Document 2, Patent Document 3, and Patent Document 4).

  Filament yarns using nanofibers are composed of hundreds to tens of thousands of single fibers with a nano-order fiber diameter. Therefore, the fiber surface area is dramatically larger than ordinary fibers. Become. As a result, it exhibits unique peach touch, water absorption, and frictional force that could not be obtained with conventional fibers, but when formed into a fabric such as knitted fabric as it is, the frictional force between the fibers is large and the knitting There is a problem that the use as clothing is restricted as a result of lack of elasticity, which is a feature of the ground, or the unique texture of nanofibers being impaired.

  In addition, the present applicant proposed a false twist crimped yarn made of sea-island type composite fiber in Japanese Patent Application No. 2006-258485, and in Japanese Patent Application No. 2007-186879, knitting using nanofibers and elastic yarns. Proposing the ground.

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 background described above, and an object of the present invention is to provide a method for producing a fabric that has not only a soft and slimy texture unique to ultrafine fibers but also has stretchability, and a fabric and a textile product. There is to do.

  As a result of intensive studies to achieve the above-mentioned problems, the present inventor performed false twist crimping on a sea-island composite fiber formed of a sea component and an island component having a diameter of 10 to 1000 nm. After obtaining the crimped yarn, a fabric is obtained using the false twisted crimped yarn, and the sea component of the sea-island type composite fiber is dissolved and removed with an alkaline aqueous solution, thereby providing a unique texture of ultrafine fibers. As a result, it was found that a fabric having elasticity as well as elasticity was obtained, and the present invention was completed by further intensive studies.

  Thus, according to the present invention, “a sea-island type composite fiber is formed of a sea component composed of an easily soluble polymer and an island component composed of a hardly soluble polymer, and the island component has a diameter of 10 to 1000 nm in the cross section of the single fiber. A false twist crimped yarn is obtained by performing false twist crimping, and after obtaining a fabric using the false twist crimped yarn, the sea component is dissolved and removed with an alkaline aqueous solution. A method for producing a fabric ".

  In that case, it is preferable that the number of islands is 100 or more in the single fiber cross section of the sea-island type composite fiber. Moreover, it is preferable that the melt viscosity of the easily soluble polymer constituting the sea component at the time of melt molding is higher than the melt viscosity of the hardly soluble polymer constituting the island component. Examples of the readily soluble polymer constituting such sea component include polylactic acid, ultrahigh molecular weight polyalkylene oxide condensation polymer, polyethylene glycol compound copolymer polyester, and copolymer polyester of polyethylene glycol compound and 5-sodium sulfoisophthalic acid. It is preferable that the weight loss rate ratio of the polymer constituting the sea component to the polymer constituting the island component is at least 200 times as long as it is at least one kind of the aqueous solution easily soluble polymer selected. In particular, the easily soluble polymer constituting the sea component is preferably polyethylene terephthalate obtained by copolymerizing 6 to 12 mol% of 5-sodium sulfoisophthalic acid and 3 to 10 wt% of polyethylene glycol having a molecular weight of 4000 to 12000. On the other hand, it is preferable that the hardly soluble polymer constituting the island component is polyethylene terephthalate.

  Moreover, in the manufacturing method of the fabric of this invention, it is preferable that the total fiber fineness of a sea-island type composite fiber exists in the range of 30-170 dtex. Moreover, it is preferable that the said false twist crimping process is based on a pin false twist system. Moreover, when obtaining a fabric, it is preferable to use an elastic yarn having a single fiber diameter larger than 1000 nm as a fiber other than the false twist crimped yarn. Moreover, it is preferable that the said fabric has a woven fabric structure or a knitted structure. Moreover, it is preferable to buff the fabric after dissolving and removing the sea component of the sea-island composite fiber with an alkaline aqueous solution.

  Moreover, according to this invention, the fabric manufactured by the said manufacturing method is provided. In such a fabric, the stretch recovery property in the vertical direction or the horizontal direction of the fabric is preferably 70% or more.

  Further, according to the present invention, sportswear, outerwear, innerwear, swimwear, men's clothing, women's clothing, yukata, work clothes, protective clothing, artificial leather, footwear, bags, hats, which are formed using the above-described fabric, Any textile product selected from the group consisting of gloves, socks, bedding, curtains, car seats, wiping tools, and beauty tools is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the cloth which has not only the soft and slimy texture peculiar to a super extra fine fiber but also a stretching property, and a cloth and textiles are obtained.

Hereinafter, embodiments of the present invention will be described in detail.
First, the sea-island type composite fiber used in the method for producing a fabric of the present invention is composed of two types of polymers having different solubility, and an easily soluble polymer (sometimes referred to as a sea component polymer) in a single fiber cross section. It is a sea-island type composite fiber in which a sea component and a hardly soluble polymer (sometimes referred to as an island component polymer) are combined as an island component, and the diameter of the island component is 10 to 1000 nm.

  Here, the weight ratio of the sea component to the island component (sea: island) is preferably within the range of 40:60 to 10:90. By setting the weight ratio within such a range, it is possible to obtain a fabric that not only exhibits a texture unique to ultrafine fibers but also has stretchability. If the proportion of the sea component is larger than 40% by weight, the amount of the solvent necessary for dissolving the sea component increases, which may cause problems in terms of safety, environmental load, and cost. In addition, even if the crimp rate of the false twisted crimped yarn before melting the sea component is increased, in order to dissolve a large amount of the sea component, the false twisted crimped yarn made of ultrafine fibers obtained after melting There is a possibility that the shrinkage ratio becomes small and sufficient stretchability of the fabric cannot be obtained. On the contrary, when the ratio of the sea component is less than 10% by weight, the islands are stuck together, and the soft feeling and suede feeling become poor. A more preferred weight ratio of the sea component to the island component (sea: island) is 40:60 to 20:80.

  In the single fiber cross section of the sea-island type composite fiber, the ratio (S / R × 100) between the island component arranged closest to the outer periphery and the distance (S) to the outer diameter (R) is preferably 1. 0 or less, more preferably 0.8 or less. Here, when (S / R × 100) is less than 1, the single fibers are fused to form a false-twist crimped yarn with a hard texture, and the soft feeling of the fabric may be lost.

  Moreover, it is especially preferable that the number of islands is 100 or more in the single fiber cross section of the sea-island type composite fiber. The greater the number of islands, the higher the productivity when producing ultrafine fibers by dissolving and removing sea components, and the fineness of the resulting ultrafine fibers becomes prominent, and the softness, glossiness, etc. unique to ultrafine fibers Can be expressed. Here, when the number of islands is less than 100, it is difficult to obtain ultrafine fibers having a small fiber diameter even if sea components are dissolved and removed. Further, if the number of islands is too large, not only does the production cost of the spinneret increase, but the processing accuracy itself tends to decrease, so it is preferable to set it to 1000 or less.

  Further, it is important that the island diameter is 10 to 1000 nm (preferably 150 to 900 nm) in the single fiber cross section of the sea-island type composite fiber. When the island diameter is less than 10 nm, the fiber structure is unstable, and the physical properties and fiber form are unstable, which is not preferable. On the other hand, when it exceeds 1000 nm, the softness, glossiness, etc. peculiar to ultrafine fibers cannot be obtained. . In addition, when the cross-sectional shape of the island component is an atypical cross section other than a round cross section, the diameter of the circumscribed circle is the island diameter. Such an island diameter can be measured by photographing a cross section of a single fiber with a transmission electron microscope. The combination of the polymers constituting the sea-island type composite fiber preferably satisfies the following two points. Two points are: (1) The melt viscosity of the sea component polymer at the time of melt spinning is larger than the melt viscosity of the island component polymer, and (2) the dissolution rate of the sea component polymer with respect to the dissolution rate of the island component polymer is 200 times or more. That is.

  When the melt viscosity of the sea component polymer at the time of melt spinning is larger than the melt viscosity of the island component polymer, the sea-island cross-section formability is improved. If this condition is satisfied, even if the composite weight ratio of the sea components is 50% or less, the islands will not adhere to each other and become different from the sea-island fibers. When the islands are stuck together, when sea components are dissolved and removed, not only ultrafine fibers but also irregular fibers are created, and problems such as dyed spots and pilling are likely to occur. A particularly preferred melt viscosity ratio (sea / island) is in the range of 1.1 to 2.0, particularly 1.3 to 1.5. If this ratio is less than 1.1, the island components are likely to stick together during melt spinning, whereas if it exceeds 2.0, the difference in viscosity is too large and the spinning tone tends to decrease.

  Moreover, when the ratio of the dissolution rate of the sea component polymer to the island component polymer is 200 times or more, the island separability is improved. When the dissolution rate ratio is less than 200 times, the island component of the separated fiber cross-section surface layer is further dissolved because the fiber diameter is small while the sea component polymer in the center of the fiber cross-section is dissolved. Despite a substantial reduction in weight, the sea component at the center of the fiber cross-section cannot be completely dissolved and removed, and the island component becomes thicker and the strength deteriorates due to solvent erosion, resulting in fluff and dyed spots. Such problems are likely to occur.

  The sea component polymer may be any as long as it satisfies the above two points, but polyester, polyamide, polystyrene, polyethylene and the like having good fiber forming properties are particularly preferable. For example, polylactic acid, ultra-high molecular weight polyalkylene oxide condensation polymer, and copolymerized polyester of 5-sodium sulfoisophthalic acid are optimal as the alkaline water soluble polymer. Here, the alkaline aqueous solution refers to potassium hydroxide, sodium hydroxide aqueous solution and the like. Nylon 6 is dissolved in formic acid, and polystyrene is dissolved in an organic solvent such as toluene.

  Among polyester polymers, polyethylene terephthalate 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. A copolyester is preferred. Here, 5-sodium sulfoisophthalic acid contributes to improving hydrophilicity and melt viscosity, and polyethylene glycol (PEG) improves hydrophilicity. In addition, when 5-sodium sulfoisophthalic acid is 6 mol% or less, the ratio of the dissolution rate of the sea component polymer to the island component polymer is less than 200 times, and the separated fiber while dissolving the sea component at the center of the fiber cross section Although the island component of the cross-section surface layer is further dissolved due to the small fiber diameter and the sea equivalent is reduced, the sea component at the center of the fiber cross-section cannot be completely dissolved and removed. Deterioration of strength due to rust or solvent erosion occurs, causing problems such as fluff and dyed spots. On the other hand, if it is 12 mol% or more, the intrinsic viscosity is lowered and the spinnability is deteriorated, which is not preferable. Further, if the PEG copolymerization amount is 3% by weight or less, the ratio of the dissolution rate of the sea component polymer to the island component polymer is less than 200 times, which is not good. If it is 10% by weight or more, there is an effect of decreasing the melt viscosity, which is not preferable. From the above, it is considered that the above range is appropriate. The higher the molecular weight, the higher the hydrophilicity, which is thought to be due to its higher order structure. However, the reactivity becomes worse and a blend system is created, which may cause problems in terms of heat resistance and spinning stability. Therefore, the above range is preferable.

  The island component polymer may be any fiber-forming polymer as long as it satisfies the above two points, and may be any polymer such as polyamide, polystyrene, or polyethylene. Among these, polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, nylon 6, and nylon 66 are preferable for clothing. Polyethylene terephthalate is particularly preferable. On the other hand, in industrial materials and medical applications, polystyrene, polyethylene and the like that are resistant to water, acid, and alkali are preferable in terms of durability. Furthermore, the island component is not limited to a round cross section, and may be an irregular cross section.

  As the die used for melt spinning, an arbitrary one such as a hollow pin group or a fine hole group for forming an island component can be used. For example, a spinneret in which an island component extruded from a hollow pin or a fine hole and a sea component flow that is designed to fill the gap between them are merged and compressed to form a sea-island cross section. Good. Examples of spinnerets that are preferably used are shown in FIGS. It is particularly desirable that the ratio (S / R × 100) of the island component disposed closest to the outer periphery to the outer periphery in the composite fiber cross section and the distance (S) to the outer diameter (R) is 1.0 or less, A spinneret that can achieve this is used. FIG. 1 shows a method in which hollow pins are discharged into the sea component resin storage portion and then merged and compressed, and FIG. 2 shows a method in which islands are formed by a fine hole method. Here, the distance 7 from the outermost row of island component distribution introduction holes to the outer periphery can be easily achieved by designing the distance (S / R × 100) to be 1.0 or less.

  The melted and discharged sea-island type composite fiber is solidified by cooling air and wound. The winding speed is preferably 1000 to 5000 m / min. If the winding speed is less than 1000 m / min, the productivity is poor, while if it exceeds 5000 m / min, the spinning stability tends to be poor.

  When the obtained unstretched yarn is stretched before the false twist crimping process, the unstretched yarn is wound once and then separately stretched, or the unstretched yarn is taken and continuously stretched. The method may be adopted. An undrawn yarn may be drawn and false-twisted simultaneously to produce a false-twisted crimped yarn. In addition, in the sea-island type composite fiber yarn before false twist crimping, the single yarn fiber fineness, the number of filaments, and the total fineness are single yarn fiber fineness of 0.5 to 10.0 dtex, the number of filaments of 5 to 75, It is preferable to be within the range of 30 to 170 dtex. The stretching temperature can be appropriately set at 60 to 150 ° C. and the stretching ratio is 1.1 to 7 times.

  The false twist crimping is preferably performed at a temperature 70 to 130 ° C, preferably 90 to 120 ° C higher than the glass transition temperature of the sea component polymer. Thereby, a false twist crimped yarn having a crimp rate as described later is obtained. In particular, when false twisting is performed at a temperature lower than 70 ° C., the crimp rate is as low as 10% or less, and the bulkiness characteristic of false twisted yarn becomes poor. Moreover, when performed at a temperature of 130 ° C. or higher, the single fibers are fused to form a false twisted crimped yarn with a hard texture.

At this time, as the false twisting device, there are a pin false twist method, a cross belt method, a disk method, and the like. The processing conditions other than the false twist crimping temperature are not particularly limited. For example, in the false twist crimping process, while feeding an undrawn yarn or a drawn yarn, the rotational speed R calculated from the following formula is used. A method of twisting with a false twist spindle (false twist pin) that rotates at high speed, heat fixing with a heater at the above temperature, then untwisting and winding can be employed.
R = 60 × 30600 / {false twisted yarn fineness (dtex)} ^1/2

  In the false twist crimped yarn thus obtained, the total crimp ratio TC of the false twist crimped yarn is preferably 10 to 25% (more preferably 10 to 20). If the total crimp rate TC is less than 10%, there is a possibility that sufficient soft feeling and stretchability cannot be obtained in the finally obtained fabric. On the other hand, when the total crimp rate TC exceeds 25%, the quality is deteriorated and the handling property may be deteriorated.

  Moreover, in such a false twist crimped yarn, the boiling water shrinkage FS is preferably 4 to 20% (more preferably 5 to 15%). If the boiling water shrinkage FS is less than 4%, the texture tends to be hard, while if it exceeds 20%, the shrinkage increases and there is a possibility that a soft texture cannot be obtained when used as a fabric. Furthermore, in the false twist crimped yarn, the breaking strength is preferably 2.0 cN / dtex or more. Below this, the quality is not sufficient and there is a risk of problems in practical use. Moreover, it is preferable that breaking elongation is 15 to 100%. If it is less than 15%, the texture becomes hard, and fluff and yarn breakage are likely to occur in the subsequent process, resulting in poor handling. Conversely, if it exceeds 100%, the quality stability may be lowered and sufficient strength may not be obtained. is there.

  In the method for producing a fabric of the present invention, a fabric is obtained using the false twist crimped yarn. At that time, it is preferable to use an elastic yarn having a single fiber diameter larger than 1000 nm as the fiber other than the false twist crimped yarn because the stretchability of the finally obtained fabric is further improved. Such elastic yarns are not particularly limited, and examples thereof include polyurethane elastic fiber yarns, polyesters, polyamides, polytrimethylene terephthalate, synthetic rubbers, and natural rubbers.

  The total fiber fineness of the elastic yarn is preferably in the range of 5 to 100 dtex, more preferably 10 to 40 dtex. If the total fiber fineness of the elastic yarn is larger than these ranges, the stretchability is too large, and the texture of the knitted fabric is hindered, or the appearance of the knitted fabric is deteriorated, so that the quality of the knitted fabric is deteriorated. On the other hand, if it is smaller than these ranges, the stretchability is impaired by the frictional force of the yarn, and the stretch recovery force is lost or the durability of the knitted fabric is lost. Further, the elongation at break of the elastic yarn is preferably 400% or more, and it is preferable that the performance is not impaired by the heat treatment during the dyeing process.

The fabric preferably has a woven fabric or a knitted fabric, and these woven fabrics and knitted fabrics can be easily knitted and woven by conventional methods. Here, examples of the fabric structure include a three-layer structure such as plain weave, twill weave, and satin weave, a change structure, a single double structure such as a vertical double weave and a horizontal double weave, and a vertical velvet. The knitted fabric 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, float knitting, one-sided knitting, lace knitting, and bristle knitting. Examples include, but are not limited to, atlas knitting, double cord knitting, half knitting, half base knitting, satin knitting, half tricot knitting, back hair knitting, jacquard knitting, and the like. The number of layers may be a single layer or a multilayer of two or more layers.
Such a fabric may contain polyester yarn and the like in addition to the false twist crimped yarn and elastic yarn.

  Next, the aqueous solution treatment is performed on the fabric, and the sea component of the sea-island type composite fiber forming the false twist crimped yarn is dissolved and removed with an alkaline aqueous solution, whereby the false twist crimped yarn is converted into a single fiber. The ultra-fine false twisted crimped yarn having a diameter of 10 to 1000 nm is used. 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.

  Next, after a normal polyester dyeing process, drying and finishing set are performed. In this case, when the fabric is a knitted fabric, if the finishing density is set while paying attention to the tension of the knitted fabric, the knitted fabric is excellent in stretchability and texture. Furthermore, 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.

  In addition, conventional brushed processing, water repellent processing, flexible processing, and functions such as ultraviolet shielding or antistatic agent, antibacterial agent, deodorant agent, insect repellent agent, phosphorescent agent, retroreflective agent, negative ion generator, etc. Various processes to be applied may be additionally applied. In particular, it is preferable that the fabric is subjected to a buffing treatment because the texture unique to the ultrafine fibers is further improved.

Since the fabric thus obtained contains false twisted yarns made of ultrafine fibers, it not only exhibits the soft and slimy texture unique to ultrafine fibers, but also the stretchability of the fabric and the skin. Excellent adhesion. Here, the surface friction coefficient of the fabric is preferably 1.5 or more, and the stretch recovery property is preferably 70% or more (preferably 80 to 120%). Further, when the fabric weight is 300 g / m ² or less (more preferably 200 g / m ² or less, particularly preferably 70 to 150 g / m ² ), it is used as underwear (inner wear) or sports wear. Further, the adhesion between the skin and the fabric is improved, which is preferable.

  Next, the textile product of the present invention is a sportswear, outerwear, innerwear, swimsuit, men's clothing, women's clothing, yukata, work clothing, protective clothing, artificial leather, footwear, heel, It is any textile product selected from the group consisting of hats, gloves, socks, bedding, curtains, car seats, wiping tools, and beauty tools. Sport wear or inner wear is particularly preferable. Since the above-mentioned fabric is included in such a textile product, it not only exhibits a soft and slimy texture peculiar to ultrafine fibers, but also exhibits stretchability of the fabric and adhesion to the skin.

  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.

<Melting viscosity> The polymer after drying is set in the orifice set to the ruder melting temperature at the time of spinning, melted and held for 5 minutes, extruded with several levels of load, and the shear rate and melt viscosity at that time are plotted. To do. By gently connecting the plots, a shear rate-melt viscosity curve is created, and the melt viscosity when the shear rate is 1000 sec- ¹ is observed.

<Dissolution rate> The yarn is wound at a spinning speed of 1000 to 2000 m / min with a 0.3φ-0.6L × 24H base of each of the sea and island components, and the residual elongation is in the range of 30 to 60%. To produce a 84 dtex / 24 fil multifilament. The rate of weight loss was calculated from the dissolution time and the dissolution amount at a bath ratio of 100 at the temperature at which each solvent was dissolved.

<Average growth 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 in the vertical and horizontal directions with the same test cloth, 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)

<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 98 cN (100 gr), place the head on a smooth base covered with silicon rubber and use a constant speed extension type tensile tester with a self-recording device. Then, the head was moved at a moving speed of 100 mm / min, the average value of the moving distance of 10 mm to 150 mm was measured, and the numerical 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.

<Breaking strength, breaking elongation>
The breaking strength (cN / dtex) and elongation at break (%) were measured according to JISL 1013.

<Total crimp rate TC (%)>
A tension of 0.044 cN / dtex (50 mg / denier) is applied to the false twisted crimped yarn, and about 3300 dtex of waste is wound around the cassette frame. A load of 0.00177 cN / dtex + 0.177 cN / dtex (2 mg / denier + 200 mg / denier) is applied to one end of the case, and the length L0 (cm) after 1 minute is measured. Subsequently, it is treated in boiling water at 100 ° C. for 20 minutes with the load of 0.177 cN / dtex (200 mg / denier) removed. After the boiling water treatment, the load of 0.00177 cN / dtex (2 mg / denier) is removed, and it is naturally dried in a free state for 24 hours. A load of 0.00177 cN / dtex + 0.177 cN / dtex (2 mg / denier + 200 mg / denier) is again applied to the air-dried sample, and the length L1 (cm) after 1 minute is measured. Next, the load of 0.177 cN / dtex (200 mg / denier) was removed, the length L2 after 1 minute was measured, and the following formula crimp rate was calculated. This measurement was performed 10 times and expressed as an average value.
Crimp rate TC (%) = {(L1-L2) / L0} × 100

<Boiling water shrinkage FS (%)>
A tension of 0.044 cN / dtex (50 mg / denier) is applied to the false twisted crimped yarn, and about 3300 dtex of waste is wound around the cassette frame. A load of 0.00177 cN / dtex + 0.177 cN / dtex (2 mg / denier + 200 mg / denier) is applied to one end of the case, and the length L0 (cm) after 1 minute is measured. Subsequently, it is treated in boiling water at 100 ° C. for 20 minutes with the load of 0.177 cN / dtex (200 mg / denier) removed. After the boiling water treatment, the load of 0.00177 cN / dtex (2 mg / denier) is removed, and it is naturally dried in a free state for 24 hours. The air dried sample was again loaded with a load of 0.00177 cN / dtex + 0.177 cN / dtex (2 mg / denier + 200 mg / denier), the length L1 (cm) after 1 minute was measured, and the following formula crimp rate Was calculated. This measurement was performed 10 times and expressed as an average value.
Boiling water shrinkage FS (%) = {(L0−L1) / L0} × 100

[Example 1]
Polyethylene terephthalate (melting viscosity at 280 ° C. at 280 ° C.) as an island component, polyethylene terephthalate (melt at 280 ° C.) 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 a sea component Viscosity is 1750 poise) (dissolution rate ratio (sea / island) = 230), sea: island = 30: 70, number of islands = 836 sea-island type composite undrawn fiber, spinning temperature: 280 ° C., spinning speed: 1500 m / It was melt-spun in minutes 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, using a known pin false twister, false twist crimping was performed at a yarn speed of 120 m / min, false twist number of 4200 T / m, and a heater temperature of 150 ° C., and the total crimp rate TC was 15%, boiling water shrinkage A false twist crimped yarn having a rate FS of 8%, a breaking strength of 2.8 cN / dtex, and a breaking elongation of 26% was obtained.

  Next, a 46 G, 30 inch circular knitting is performed using the false twisted yarn and polyurethane monofilament elastic yarn (manufactured by Operontex Co., Ltd., total fineness 22 dtex / 1 fill, single fiber diameter 60 μm, breaking elongation 21%). A round knitted fabric of a bear tengu structure was knitted with a machine (VXC-3S manufactured by Fukuhara Seiki Co., Ltd.). At that time, the polyurethane monofilament elastic yarn was knitted while drafted at 2.0 times. The obtained knitted fabric was wet-heat treated at 90 ° C., then dry heat set as a preset at 180 ° C., and then with a 3% NaOH aqueous solution to remove the sea component of the sea-island type composite drawn yarn, 70% The alkali was reduced by 30% at ° C. 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.

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 false twisted yarn (single fiber diameter 700 nm) was uniform. It was confirmed that the fiber was opened.
In the obtained knitted fabric, the basis weight is 140 g / m ² , 120 course / 2.54 cm, 74 wales / 2.54 cm, the average elongation recovery rate is 89.6%, the friction coefficient is 2.1, the elongation recovery property and adhesion It was excellent. Further, the fabric was soft and exhibited a soft and slimy texture peculiar to ultra-fine fibers (grade 3). In addition, the dough had no wrinkles and was of a satisfactory quality (grade 3).

  Using this knitted fabric to sew and wear a T-shirt (sportswear), it had excellent skin adhesion, a moist texture with a peach touch tone unique to nanofibers, and was extremely comfortable to wear. . 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 knitted fabric obtained in Example 1 was dyed in the same manner, and then the surface of the knitted fabric was buffed with # 400 sandpaper, and the final set was dry heat set at 170 ° C.
In the obtained knitted fabric, the fabric physical properties were the same as in Example 1, but the friction coefficient was particularly excellent (large) as 3.4. In addition, the surface of the fabric was peach-like and soft, and there were no wrinkles or streaks. In addition, it had a soft and slimy texture peculiar to ultrafine fibers (grade 3).

  When sewing and wearing spats using such a knitted fabric, it had a soft and slimy texture peculiar to ultra-fine fibers, had good stretchability and skin followability, 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.

  In addition, when a golf glove is made using the knitted fabric and worn, it has a soft and slimy texture unique to nanofibers, has good adhesion to the grip, and the golf club is There was a sense of unity and there was no hand slipping, so it was extremely functional. 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 3]
Using only the false twist crimped yarn obtained in Example 1, a circular knitted fabric of a tengu structure is knitted using a 46G, 30 inch circular knitting machine (VXC-3S manufactured by Fukuhara Seiki Co., Ltd.). did. 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.

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 false twisted yarn (single fiber diameter 700 nm) was uniform. It was confirmed that the fiber was opened.
The resulting knitted fabric has a basis weight of 57 g / m ² , 60 courses / 2.54 cm, 114 wales / 2.54 cm, an average elongation recovery rate of 73.4%, a friction coefficient of 1.8, elongation recovery properties and adhesion. It was excellent. Further, the fabric was soft and exhibited a soft and slimy texture peculiar to ultra-fine fibers (grade 3). In addition, the dough had no wrinkles and was of a satisfactory quality (grade 3).

  This knitted fabric is used to sew and wear a T-shirt (sportswear). It has excellent skin adhesion, has a moist texture with a peach touch tone unique to ultra-fine fibers, and is extremely comfortable to wear. It was. 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]
The sea-island type composite drawn yarn 56dtex / 10fil obtained using the same sea-island type composite fiber as in Example 1 is not subjected to false twist crimping, and is performed except that the knitted fabric is knitted using only the drawn yarn. Same as Example 1.
In the obtained knitted fabric, the weight per unit area was 62 g / m ² , 64 courses / 2.54 cm, 110 wales / 2.54 cm, and the average extension recovery rate was 52.0%, which was inferior in extension recovery. In particular, the horizontal dimension was not stable, causing wrinkles and streaks on the surface of the fabric, and sufficient quality could not be obtained (first grade).

[Comparative Example 2]
Circular knitting as in Example 1 using polyester filament yarn (manufactured by Teijin Fibers Ltd., total fineness 35 dtex / 72 fil, non-crimped) and polyurethane monofilament yarn (manufactured by Asahi Kasei Fibers Co., Ltd., total fineness 33 dtex / 1 fil) Created the ground.
In the obtained knitted fabric, the basis weight was 123 g / m ² , 121 course / 2.54 cm, 71 wale / 2.54 cm, the elongation recovery rate in the vertical direction was 95%, and the elongation recovery rate in the horizontal direction was 89%. Although the properties were excellent, the coefficient of friction was as low as 0.3, and satisfactory adhesion and texture were not obtained (first grade).

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the fabric which has not only the soft and slimy texture peculiar to a microfiber, but also a stretching property, a fabric, and a textile product are provided, The industrial value is very large.

In the present invention, it is an example of a spinneret used for spinning a sea-island type composite fiber. In the present invention, it is another example of a spinneret used for spinning a sea-island type composite fiber.

Explanation of symbols

1: pre-distribution island component polymer reservoir portion 2: island component distribution introduction hole 3: sea component introduction hole 4: pre-distribution sea component polymer reservoir portion 5: individual sea / island = sheath / core structure forming portion 6: total confluence of sea islands Part 7: Distance from outermost island component distribution introduction hole to outer periphery

Claims (15)

  Applying a false twist crimp to sea-island type composite fibers that are formed of sea components composed of easily soluble polymers and island components composed of hardly soluble polymers, and whose island component diameter is 10 to 1000 nm in the cross section of the single fiber. A process for producing a fabric comprising obtaining a false-twisted crimped yarn, obtaining a fabric using the false-twisted crimped yarn, and then dissolving and removing the sea component with an alkaline aqueous solution.   The manufacturing method of the fabric of Claim 1 whose island number is 100 or more in the single fiber cross section of the said sea island type composite fiber.   The manufacturing method of the fabric of Claim 1 or Claim 2 whose melt viscosity of the easily soluble polymer which comprises a sea component at the time of melt molding is higher than the melt viscosity of the hardly soluble polymer which comprises an island component. The easily soluble polymer constituting the sea component is selected from polylactic acid, ultra-high molecular weight polyalkylene oxide condensation polymer, polyethylene glycol compound copolymer polyester, and copolymer polyester of polyethylene glycol compound and 5-sodium sulfoisophthalic acid. The method for producing a fabric according to claim 3, wherein the weight loss rate ratio of the polymer constituting the sea component to the polymer constituting the island component is at least 200 times. The easily soluble polymer constituting the sea component is polyethylene terephthalate obtained by copolymerizing 6 to 12 mol% of 5-sodium sulfoisophthalic acid and 3 to 10 wt% of polyethylene glycol having a molecular weight of 4000 to 12000. A method for producing the fabric.   The method for producing a fabric according to any one of claims 1 to 5, wherein the hardly soluble polymer constituting the island component is polyethylene terephthalate.   The manufacturing method of the fabric in any one of Claims 1-6 whose total fiber fineness of the said sea-island type composite fiber exists in the range of 30-170 dtex.   The manufacturing method of the fabric in any one of Claims 1-7 whose said false twist crimping process is based on a pin false twist system.   The method for producing a fabric according to any one of claims 1 to 8, wherein an elastic yarn having a single fiber diameter larger than 1000 nm is used as a fiber other than the false twist crimped yarn when obtaining the fabric.   The method for producing a fabric according to claim 1, wherein the fabric has a woven fabric structure or a knitted fabric structure.   The method for producing a fabric according to any one of claims 1 to 10, wherein the sea component of the sea-island type composite fiber is dissolved and removed with an alkaline aqueous solution, and then the fabric is subjected to a buffing treatment.   The fabric manufactured by the manufacturing method in any one of Claims 1-11.   The fabric according to claim 12, wherein the friction coefficient of the fabric surface is 1.5 or more.   The fabric according to claim 12 or claim 13, wherein the stretch recovery property in the vertical direction or the horizontal direction of the fabric is 70% or more.   Sportswear, outerwear, innerwear, swimwear, men's clothing, women's clothing, yukata, work clothing, protective clothing, artificial leather, footwear, bags, hats, comprising the fabric according to any one of claims 12 to 14. , Any textile product selected from the group consisting of gloves, socks, bedding, curtains, car seats, wiping tools, and beauty tools.

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