JP2014019980A - Water absorption structural change fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fabric and a fiber product in which convexoconcave expresses on a fabric surface and thickness increases by water absorption, thereby sticky feeling, stuffy feeling, and cold feeling can be reduced.SOLUTION: A water absorption structural change fabric is a woven or knitted fabric. The woven or knitted fabric comprises using a sheath-core type composite yarn in which a cross sectional area ratio of sheath-core in which a core part comprises a polyamide-based polymer and a sheath part comprises a polyester polymer is 20/80-80/20 in at least one part, wherein the polyester polymer of the sheath-core type composite yarn includes an opal processed opal processed part and a non-opal processed part, the non-opal processed part is arranged in an island shape to the opal processed part, the maximum diameter of the island shape non-opal processed part is 3-20 mm, and a space between the non-opal processed parts is 0.5-20 mm.

Description

The present invention relates to a fabric using a core-sheath type composite fiber yarn having a core part made of a polyamide-based polymer and a sheath part made of a polyester-based polymer at least in part, wherein the sheath part of the core-sheath type composite fiber is This is a water-absorbing structure-changing fabric in which a contact portion and a non-contact portion are formed by partial erosion. More specifically, clothing using the fabric sweats when worn, and the polyamide-based polymer in the contact portion absorbs and stretches to cause elongation strain in the fabric, resulting in a three-dimensional structural change in the fabric surface. The present invention relates to a fabric and a method for producing the same. Since three-dimensional unevenness is developed on the surface of the fabric, a comfortable fiber product that can reduce the contact between the fabric and the skin and reduce the stickiness of the fabric.

Conventionally, when a cloth made of synthetic fiber or natural fiber is used as clothing such as sportswear or innerwear, a feeling of stickiness is generated by sweating from the skin, or the ease of movement is hindered by the cloth being in close contact with the skin. There was a problem of deteriorating comfort.

As a method for eliminating such a sticky feeling caused by sweating, for example, Patent Document 1 discloses a woven or knitted fabric composed of a water-absorbing self-stretching yarn and a non-self-stretching yarn, and the water-absorbing self-stretching yarn absorbs moisture during sweating. As a result, a fabric has been proposed in which the porosity of the woven or knitted fabric is increased and air permeability is improved, and the surface of the woven or knitted fabric is uneven, and the contact area with the skin is reduced to reduce stuffiness and stickiness. Yes. However, in such a fabric, the entire fabric is stretched at the time of water absorption, so that the fabric does not have a sufficient three-dimensional structure, and the reduction in stickiness is insufficient.
Further, Patent Document 2 uses side-by-side type composite fibers in which different polymers of polyester and polyamide are bonded together, and effectively releases moisture staying in the clothes by improving the air permeability of the fabric during sweating. When sweating stops, a breathable self-regulating woven or knitted fabric that suppresses the feeling of cooling due to excessive diffusion of moisture due to a decrease in the breathability of the fabric and can always keep comfort is proposed, The purpose is to adjust the air permeability, and the side-by-side type composite fiber alone is small in the shape change of the woven or knitted fabric at the time of water absorption, does not exhibit sufficient unevenness, and is insufficient for reducing the stickiness. there were.
Further, in Patent Document 3, the surface of the knitted fabric is formed by changing the shape of the yarn that forms the knitted fabric by absorbing moisture, including synthetic yarn multifilament yarns that are mainly composed of a hygroscopic polymer and twisted. There is disclosed a knitted fabric characterized in that the density changes, the air flow rate is increased, and the internal humidity is efficiently dissipated to the outside. Patent Document 4 discloses that the crimp rate is reversible according to the change in humidity. Although knitted and knitted fabrics using cellulose acetate fibers that can change the climate in clothes and change the surface morphology are disclosed, these control the breathability and are not sticky due to sweat. It will not be resolved.
Further, Patent Document 5 discloses a woven or knitted fabric composed of a water-absorbing self-stretching yarn and a non-self-stretching yarn, and the resin adheres while having an application portion and a non-application portion, and the non-application portion of the resin protrudes during water absorption. Although fabrics that change in shape, increase in thickness, or improve air permeability are disclosed, the resin impairs the air permeability of the fiber fabric, and conversely, there is a risk of creating a feeling of stuffiness when sweating. .

JP 2005-36374 A JP 2003-41462 A Japanese Patent Laid-Open No. 10-77544 JP 2002-180323 A JP 2006-265757 A

The present invention has been made in view of the above-described background, and its purpose is to reduce unevenness on the fabric surface due to water absorption, to reduce the feeling of stickiness, stuffiness, and cooling, and for fashion clothing and sports. An object of the present invention is to provide a cloth and a textile product suitable for clothing and inner clothing.

The present invention uses at least a portion of a core-sheath type composite yarn having a core-shell made of a polyamide-based polymer and a sheath-shaped portion made of a polyester-based polymer having a cross-sectional area ratio of 20/80 to 80/20. A woven or knitted fabric having a contact portion and a non-contact portion from which the polyester-based polymer of the core-sheath composite yarn has been removed, and the non-extraction portion is arranged in an island shape with respect to the removal portion. The maximum diameter of the non-extracted portion is 3 to 20 mm, and the interval between the non-extracted portions is 0.5 to 20 mm.
Further, it is preferable that the core-sheath type composite yarn comprises 40% or more of the fabric weight.
Moreover, it is preferable that the thickness change rate of the fabric before and after water absorption is 5 to 20%.

According to the present invention, it is possible to reduce the feeling of stickiness, stuffiness, and cooling due to the appearance of unevenness in the fabric due to water absorption, and the design pattern imparted by the discharge after the structural change after water absorption. A water-absorbing structure-changing fabric that does not easily disappear and a fiber product using the fabric are obtained.

It is an example of a schematic sectional drawing showing the state of the core sheath type composite yarn of the present invention. It is the schematic showing the discharge pattern of this invention. It is the schematic showing another discharge pattern of this invention. It is the schematic showing the discharge pattern of a comparative example.

Hereinafter, embodiments of the present invention will be described in detail.
The water-absorbing structure-changing fabric of the present invention has a core-sheath type in which at least a cross-sectional area ratio obtained by composite spinning of a polyamide polymer in a core part and a polyester polymer in a sheath part is 20/80 to 80/20 A woven or knitted fabric using at least a part of a composite fiber, having a contact part and a non-contact part from which the polyester-based polymer of the core-sheath composite fiber has been extracted, and the non-extraction part being discharged Is a fabric in which the maximum diameter of the island-shaped non-contact portion is 3 to 20 mm, and the interval between the non-contact portions is 0.5 to 20 mm. The extracted portion exhibits water absorption extensibility, and the non-extracted portion exhibits water absorption non-extensibility.

The core-sheath type composite fiber used for the water-absorbing structure-changing fabric of the present invention is one in which the core part is made of a polyamide-based polymer and the sheath part is made of a polyester-based polymer. As the polyamide-based polymer used for the core, conventionally known polymers such as nylon 6, nylon 7, nylon 9, nylon 11, nylon 12, nylon 46, nylon 66, nylon 610, nylon 612 can be used. Among them, those having a saturated water content of 4 to 12% in water at 23 ° C. in the JIS K7209 A method are preferable. If the saturated moisture content is less than 4%, the difference in elongation between the extracted portion and the non-extracted portion cannot be obtained at the time of water absorption, and there is a possibility that unevenness will not appear. On the other hand, if it is larger than 12%, a sticky feeling may be felt during water absorption. As long as the saturated water absorption is 4 to 12%, the polymer may be used alone, or a plurality of types may be used in combination. Among these, nylon 6 and nylon 66 are particularly preferable from the viewpoint of water absorption, versatility, and colorability.
The relative viscosity (JIS K6933) of the polyamide-based polymer is preferably 1.5 to 6.0, more preferably 2.0 to 5.0, as measured in 98% sulfuric acid at a concentration of 1% and a temperature of 25 ° C. . If the relative viscosity is less than 1.5, the mechanical strength tends to be insufficient, and if it exceeds 6.0, the workability tends to be lowered. When there are a plurality of polyamide resins to be used, it is preferable that the relative viscosity of the mixture is within the above range.

Examples of the polyester polymer used for the sheath portion of the core-sheath composite fiber include polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT), and polylactic acid. Examples thereof include polyesters and modified polyester copolymers containing these as a main component. Of these, a polyester whose main repeating unit is ethylene terephthalate is preferable, and a copolymerized polyethylene terephthalate modified so as to improve the dischargeability and colorability is more preferable.
Examples of the modifying component include compounds having an alkali metal sulfonic acid group, polyalkylene glycol, and diethylene glycol (DEG).
As the compound having an alkali metal sulfonic acid group, isophthalic acid (SIP component) having an alkali metal sulfonic acid group such as 5-sodium sulfoisophthalic acid is preferable, and 1.0 to 5.0 mol% of SIP component is more preferable. preferable. The modified polyester copolymer modified in this way is preferable in terms of touchability and dyeability, and is relatively good in adhesion to the composite polyamide component.
When polyalkylene glycol (PEG) is used as the modifying component, 1.0 to 5.0 mass% when the molecular weight of the polyalkylene glycol is less than 100 to 1,000, and 5.0 to less than 1000 to 10,000. It is preferable to use 20.0% by mass.
Moreover, when using a diethylene glycol (DEG) as a modified | denatured component, it is preferable to use 1.0-10.0 mol%.

One type of modified polyester copolymer may be used alone, or a plurality of modified polyester copolymers may be used in combination. Examples of combinations of the modifying components include a modified polyester copolymer in which the main repeating unit modified with an SIP component of 1.0 to 5.0 mol% is ethylene terephthalate, and a PEG having a molecular weight of 100 to 1000 of 1.0 to 5.0. A modified polyester copolymer modified with 5.0 to 20.0 mass% of PEG having a mass% or a molecular weight of 1000 to 10,000, and a modified polyester copolymer using 1.0 to 10.0 mol% of DEG What was mixed melt-spun is more preferable.

The intrinsic viscosity of the polyester polymer is a value measured by using an Ostwald viscometer at a temperature of 20 ° C. by dissolving 0.5 g of the polymer in 50 ml of a mixture of phenol / tetrachloroethane = 6/4 (weight ratio). Preferably it is 0.4-1.0, More preferably, it is 0.5-0.8. If the intrinsic viscosity is less than 0.4, the mechanical strength tends to be insufficient, and if it exceeds 1.0, the workability is lowered and the yarn-making property is deteriorated. When a plurality of polyester polymers are used, it is preferable that the intrinsic viscosity of the mixture is within the above range.

Compared with unmodified polyethylene terephthalate, by using the modified polyester copolymer as described above, decomposition with respect to alkali is promoted, and productivity is improved when alkali discharge is performed. Further, since the alkali concentration and temperature conditions can be relaxed and the treatment time can be shortened, damage to the polymer that is not removed is reduced, and a high-quality fabric can be obtained.

The outer shape of the core-sheath type composite fiber may be any of a round cross section, a polygon cross section, a multi-leaf cross section, and other known cross sectional shapes in the fiber cross section, and the core shape is also a round cross section, a polygon cross section, an irregular cross section, and other known cross sections. Any of the cross-sectional shapes may be used. Moreover, the core part may be in the center part of the core-sheath type composite fiber, may be in an eccentric state, or may be in a state where the core part is partially exposed on the surface.
In addition to the single core, the core has no effect on the elongation of the polyamide polymer part at the time of water absorption and the appearance of the unevenness of the fabric. Although a core structure may be used, a round cross-sectional shape is preferable and a single core is preferable in terms of the dischargeability of the polyester-based polymer in the sheath.

When deep dyeability is required in dyeing, a cross-sectional shape in which a part of the polyamide-based polymer in the core is exposed on the fiber surface is particularly preferable. By using such a shape, both the polyamide-based polymer in the core and the polyester-based polymer in the sheath can be dyed, so that the deep dyeing property is improved.
In addition, since the interface between the polyamide polymer and the polyester polymer is poor in affinity, the polyamide polymer is exposed on the fiber surface, so that the extraction agent can easily penetrate into the interface of the core sheath and promote the extraction. is there.
When the cross-sectional shape is a side-by-side type, since the adhesion between the polyamide polymer and the polyester polymer is insufficient, the boundary between the extracted portion and the non-extracted portion after the polyester polymer is discharged In this case, there may be a problem of yarn cracking due to the separation of the polyamide polymer and the polyester polymer. However, the cross-sectional shape as described above causes a defect of yarn cracking due to the separation of the polyamide polymer and the polyester polymer. It becomes difficult.

The core-sheath type composite fiber used in the present invention is usually produced by a melt composite spinning method. The cross-sectional area ratio between the core part and the sheath part (hereinafter referred to as the core-sheath ratio) is a ratio of 20/80 to 80/20, and is particularly preferably set to a ratio of 30/70 to 70/30. If the ratio of the cross-sectional area of the core portion is less than 20%, the fiber strength after the polymer of the sheath portion is removed becomes insufficient, the extensibility of the contact portion becomes weak, and the unevenness may not be expressed. is there. On the other hand, if the ratio of the cross-sectional area of the core exceeds 80%, the sheath may break when it absorbs water.

As described above, the core-sheath type composite fiber used in the present invention is preferably such that a part of the polyamide polymer in the core part is exposed on the fiber surface in the cross-sectional shape. In that case, the ratio at which the core part is exposed to the sheath part (the ratio of the sheath polymer to the cross-sectional circumference of the core-sheath composite yarn) can maintain the strength after the discharge, and the extracted part and the non-extracted part Although it will not specifically limit if the design expression by a difference and the expansion | extension difference at the time of water absorption are obtained, 5 to 40% of the outer peripheral length of a sheath part is preferable. More preferably, it is 10 to 30%. If it exceeds 40%, yarn breakage may occur, causing problems in weaving and knitting. Moreover, when it is set as a fabric, there is a possibility that the eye surface becomes bad and the wear resistance is inferior.

The core-sheath type composite fiber used in the present invention is preferably used as a multifilament yarn. The single yarn fineness is preferably 1 to 10 dtex, more preferably 1 to 4 dtex, and still more preferably 1 to 2 dtex. If the single yarn fineness is less than 1 dtex, the strength of the fabric after discharging may be greatly reduced. If the single yarn fineness exceeds 10 dtex, the fabric may become hard or the polyester-based polymer cannot be sufficiently discharged and remains as a residue, which may cause problems such as uneven dyeing in a later step.

Moreover, the total fineness of the multifilament yarn by the core-sheath type composite fiber used in the present invention is usually preferably 10 to 220 dtex, and preferably 33 to 110 dtex. If the total fineness is less than 10 dtex, it may be difficult to form a fabric such as weaving or knitting, and the strength of the fabric may be greatly reduced after the discharge process. If the total fineness exceeds 220 dtex, the spinning operability may be deteriorated, and the fabric may be hardened.

A conventionally well-known method can be used as a manufacturing method of the core-sheath-type composite fiber used by this invention. For example, each polymer is melted and kneaded in an extruder, introduced into the spinning head so that the polyamide polymer becomes the core and the polyester polymer becomes the sheath, and is melt-spun from the core-sheath compound nozzle. A method is mentioned. The spun fiber is cooled and solidified, and after cooling and solidification, a spinning oil agent is applied using an oil supply applying device. Thereafter, the fiber is wound up by a scissor, and a core-sheath composite undrawn yarn is obtained. Further, the obtained undrawn yarn is subjected to drawing treatment with a drawing machine. There are no particular restrictions on the conditions for twisting, and it can also be obtained by a high-order process such as a direct spinning drawing method or a POY yarn and then false twisting as required.

The water-absorbing structure-changing fabric of the present invention is a woven or knitted fabric using a core-sheath type composite fiber having a core part made of a polyamide polymer and a sheath part made of a polyester polymer. The yarn is preferably used in an amount of 40% or more, more preferably 100% of the fabric weight. If it is less than 40%, irregularities may not be sufficiently developed during water absorption.
Moreover, as a fiber to combine, the polyamide-type polymer fiber and cellulose-type polymer fiber which expand | extend by water absorption are preferable. If the combined fiber is a polyester-based polymer or polyolefin-based polymer fiber that does not expand due to water absorption, even if the core-sheath type composite fiber expands during water absorption, the fiber does not expand, and thus there is a risk that the unevenness cannot be sufficiently developed. .

In the core-sheath type composite fiber used in the present invention, since only the polyester polymer in the sheath portion of the portion treated with the sweeping agent is removed, even if the yarn constituting the fabric is drained, it is not cut and removed. Since the contact part and the non-extraction part are connected continuously, the extension force of the polyamide polymer part of the extraction part is transferred to the boundary part with the non-extraction part without loss during water absorption. Unevenness due to strain can be easily expressed.
In addition, since the core-sheath type composite fiber used in the present invention removes only the polyester-based polymer in the sheath portion of the portion treated with the extractant, it can be cut even if the yarn constituting the fabric is removed. Not. Therefore, there is no deterioration in quality due to fraying of yarn (filament breakage) at the boundary between the contact portion and the non-contact portion. Therefore, the boundary portion between the contact portion and the non-contact portion is clear and the fabric has excellent sharpness, and pattern formation that facilitates the development of unevenness is possible.

Examples of the form of the fabric of the present invention include woven fabric, knitted fabric, and non-woven fabric, and are not particularly limited as long as the fabric is generally used as clothing. Examples of the woven fabric include plain weave, twill weave and satin weave. Examples of the knitted fabric include weft knitting such as flat knitting, rubber knitting and pearl knitting, tricot knitting, cord knitting, atlas knitting, chain knitting, inlay knitting and the like, and do not hinder the operation and effect of the present invention. If it is a range, it will not specifically limit.

In addition, the pattern of non-extraction part (polyamide part) and non-extraction part (core-sheath part) formed by extraction of polyester polymer should have non-extraction part in an island shape with respect to the extraction part. Is preferred. When the non-extracted portions are continuously connected, distortion at the time of water absorption is difficult to occur, and unevenness is hardly exhibited. The shape of the non-contact portion existing in the island shape may be any of a circular shape, an oval shape, a polygonal shape, and an indeterminate shape combining a curve and a straight line, and these island-shaped patterns are regularly or randomly arranged. It is preferable. In particular, the unevenness of the fabric is likely to appear when regularly arranged in a polygonal shape. Examples of island shapes are shown in FIGS. In addition, the size of the non-contact portion and the arrangement interval also affect the appearance of unevenness. As the size of the non-contact portion, the maximum diameter is 3 to 20 mm, and the interval between the non-contact portions arranged in an island shape is 0.5 to 20 mm, and more preferably, the maximum diameter is 4 to 10 mm. And the space | interval between non-extraction parts is 0.5-2 mm. If the maximum diameter or the distance between the non-extracted parts is outside the above range, the convex part generated by distortion due to the extension of the extractive part at the time of water absorption becomes fine, and the area of the part that does not contact the skin due to the appearance of irregularities Less, the effect of reducing stickiness is reduced.
Moreover, the thickness change rate of the fabric due to the appearance of irregularities upon water absorption is preferably 5 to 20%. If it is less than 5%, the effect of reducing the feeling of stickiness when sweating is reduced. On the other hand, if it exceeds 20%, the sticky feeling is greatly reduced, but the volume feeling in the thickness direction of the fabric is increased, so that the feeling of comfort may be impaired.

The application of the discharging agent to the fabric is preferably performed by a printing method or an inkjet method.
In the printing method, a printing paste containing an extractant in the paste is printed on a desired portion of the fabric. In the inkjet method, an ink containing the extractant (hereinafter referred to as an extractable ink) is used in the inkjet method. To the desired part of the fabric.

The removal agent used in the present invention is not particularly limited as long as the damage to the polyamide polymer is small and the polyester polymer is removed, such as aluminum nitrate, sodium sulfate, guanidine weak acid salt, polyhydric alcohol. Examples thereof include known discharging agents such as polyhydric alcohol ethylene oxide adducts having 2 mol or more of ethylene oxide added, and those using polyhydric alcohol ethylene oxide adducts and quaternary ammonium salts. Of these, guanidine weak acid salt is preferable because it has a high pitting effect and is excellent in terms of environment and safety. Among these, compared to other strong alkalis such as caustic soda, the pH of the aqueous solution is as low as 10 to 13, and the safety of the work and the device are not easily corroded. To color the polymer fiber, the colorant is used. In particular, guanidine carbonate is preferable from the viewpoint of having a small influence.

The application of the extractant is desired to include a region (extraction portion) where the polyester-based polymer in the sheath portion is extracted and the polyamide-based polymer in the core portion is exposed, and a region (non-extraction portion) that is not exposed. It is given so that the pattern of is formed.

As a printing apparatus used when applying the discharging agent by a printing method, a commonly used printing machine such as a roller printing machine or a screen printing machine is used, and the printing paste is printed on the fabric. The printing is performed by a generally used printing method such as roller printing or screen printing. The paste is not particularly limited, and known pastes are used, and natural, processed, semi-synthetic and synthetic pastes such as wheat starch, tragacanth gum, locust bean gum, polyvinyl alcohol and sodium polyacrylate are used alone. Alternatively, two or more kinds can be mixed and used. Moreover, what is necessary is just to adjust and use the viscosity of the printing paste to be used, and the amount of provision according to conditions, such as the thickness and structure | tissue of object cloth. After applying the printing paste by a printing machine, the polyester polymer is removed by dry heat or wet heat treatment, and further subjected to a washing treatment, whereby the fabric of the present invention can be produced.

In addition, the colorant and / or the polyamide-based polymer that can color the polyester-based polymer (including the polyester-based polymer of the core-sheath type composite fiber used in the present invention) simultaneously with the discharging agent in the paste application step ( It is also possible to add a colorant capable of coloring the core-sheath composite fiber used in the present invention (including the polyamide-based polymer) at the same time. That is, the above-mentioned discharge agent, polyester fiber dye and polyamide fiber dye can be used alone or in combination, mixed with printing paste, and printed, allowing the colored pattern to be colored on the surface of the discharged portion on the same fabric. In addition, various processes such as a discharge process, a discharge process, a coloring process of the extracted part, and a coloring process of the non-extracted part can be simultaneously performed.

Next, when the discharging agent is applied using an ink jet method, the depth and width of the discharging portion can be freely adjusted. A precise design at the level of one pixel can be freely expressed without restrictions on the pattern as in the textile printing type. Moreover, in addition to time, cost, and workability, a large amount of drainage is not discharged, so it can be said that it is excellent in terms of environment.

The ink jet printing apparatus used when applying the discharging agent by the ink jet method is not particularly limited as long as it does not thermally decompose the dye ink used as the discharging agent and the coloring ink. For example, any of a continuous method such as a charge modulation method, a charge ejection method, a micro dot method and an ink mist method, an on-demand method such as a piezo conversion method and an electrostatic suction method can be adopted. Among these, the piezo conversion method is preferable because it is excellent in stability of ink discharge amount and continuous discharge property and can be manufactured at a relatively low cost.

The application amount of the fiber-decomposed agent in the ink jet method is preferably in the range of 1 to 50 g / ^{m 2,} more preferably 5 to 30 g / ^{m 2.} If the applied amount is less than 1 g / m ² , it will be difficult to be removed, and if it exceeds 50 g / m ² , the amount will be more than necessary, which tends to increase the cost.

Moreover, it is preferable to use the extractant dissolved in water from the viewpoint that stable discharge is possible for a long time. In that case, the concentration of the extractant is preferably in the range of 10 to 35% by mass, and more preferably in the range of 15 to 30% by mass. If it is less than 10% by mass, it will be difficult to be removed, and if it exceeds 35% by mass, it will be close to the solubility limit of the extractant in water. Tends to be impossible.

The viscosity of the dischargeable ink is preferably 1 to 10 cps and more preferably 1 to 5 cps at 25 ° C. If it is less than 1 cps, the ejected ink droplets are split during the flight, and it becomes difficult for the ink to land at the target location, so that the boundary between the extracted portion and the non-extracted portion tends to be difficult to understand. Due to the viscosity, it tends to be difficult to eject ink from the nozzles.

Here, it is preferable to include a step of forming an ink receiving layer on the fabric before the step of applying the discharging agent to the fabric by the ink jet method. The ink receiving layer thus formed instantaneously receives the dischargeable ink ejected from the nozzle and holds it appropriately, so that bleeding of the dischargeable ink can be prevented.

The ink receiving layer is usually formed of an ink receiving agent mainly composed of a water-soluble polymer.
Examples of the water-soluble polymer include sodium alginate, methyl cellulose, hydroxymethyl cellulose, carboxymethyl cellulose, starch, guar gum, polyvinyl alcohol and polyacrylic acid. Two or more of these may be used in combination. Of these, carboxymethylcellulose is preferred because of its excellent alkali resistance, low cost and excellent fluidity. The ink-receiving layer may contain a reduction inhibitor, a surfactant, a preservative, a light resistance improver, and the like as necessary.

The ink receiving agent is preferably applied in an amount of 1 to ²⁰ g / m ^{2 in} terms of solid content, and more preferably ² to 10 g / m ² . If the applied amount is less than 1 g / m ² , the ink receiving ability is inferior, so that the ink tends to bleed or fall through, and if it exceeds 20 g / m ² , the fabric becomes hard. The transportability tends to be poor, and the acceptor tends to fall off the fabric during handling.

Examples of the application method include a dip nip method, a rotary screen method, a knife coater method, a kiss roll coater method, and a gravure roll coater method. In particular, the dip nip method is preferable in that an ink receiving layer can be provided not only on the surface of the fabric but also on the entire fabric, and a fabric having excellent ink receiving ability can be produced.

In the case of the ink jet method, it is also possible to apply an ink capable of coloring a polyester-based polymer and / or an ink capable of coloring a polyamide-based polymer simultaneously with the discharging agent. That is, by preparing an ink set including the dischargeable ink, the polyester-based polymer colored ink, and the polyamide-based polymer colored ink, and selecting and printing the ink as appropriate, the color pattern on the discharged portion on the same fabric. Thus, various processes such as a discharge process, a discharge process, a coloring process of a removed part, and a colored process of a non-extracted part can be simultaneously performed.
In addition, a drying inhibitor, a preservative, a water-soluble pigment, and the like can be added to the dischargeable ink as necessary.

In both the textile printing method and the ink jet method, a colorant (including a colored ink, a dye, and a pigment) can be applied at the same time as the application of the discharge agent. More specifically, when a color pattern is expressed in the discharge portion, It is preferable to select a polyamide-based polymer colorant and apply it to the same location as the discharge agent. In addition, when a color removal process is not required and only the polyester polymer is colored, a polyester polymer colorant is selected and applied. When the color removal process is not required and only the polyamide polymer is colored, a polyamide polymer colorant is selected and printed. In this case, in order to color the polyamide-based polymer that is the core of the core-sheath composite fiber that is not subjected to the discharge process, it is necessary that the polyamide-based polymer in the core is exposed to the sheath. Depending on the fabric used, if only one of the polymers is colored, the resulting color pattern may have an uneven appearance or white blurring, resulting in poor quality. In such a case, each colorant is printed at the same location, and the polyester polymer and the polyamide polymer are colored simultaneously.

As the polyester-based polymer colorant, a colorant in which a disperse dye excellent in fastness, sharpness and color developability is dispersed in water can be mainly used. In addition, when a colorant in which a pigment is dispersed in water or a cationic dyeable polyester polymer is used, a colorant in which a cationic dye is dissolved or dispersed in water can be used.

As the polyamide polymer colorant, a colorant obtained by dissolving a reactive dye, an acid dye or a metal complex dye in water can be used. The reactive dye is preferably a reactive dye having at least one selected from a monochlorotriazine group, a monofluorotriazine group, a difluoromonochloropyrimidine group, a trichloropyrimidine group, and the like as a reactive group.
Reactive dyes having other reactive groups are prone to hydrolysis under alkaline conditions, and when mixed with ink containing an extractant on a fabric, the reactive groups decompose and the color density of the polyamide polymer Is likely to decline.
When a polymer other than the polyester-based polymer and the polyamide-based polymer is contained, a colorant capable of coloring the polymer can be appropriately selected and printed.

Even in the case of the ink jet system, heat treatment is required after applying the dischargeable ink to the fabric. By performing the heat treatment, the extractable polymer is removed, and when colored ink is applied, the polymer is colored.

A preferable heat treatment condition for discharging the polyester-based polymer of the core-sheath type composite fiber is about 160 minutes at 160 to 190 ° C. When the temperature is lower than 160 ° C., there is a possibility that the discharging of the polyester-based polymer may be insufficient, and when the colored ink is applied by an ink jet method, the coloring to the polyester-based polymer may be insufficient. is there. If the temperature exceeds 190 ° C., the polyamide polymer tends to be insufficiently colored, or a phenomenon such as yellowing of the polymer tends to occur. The heat treatment may be either dry heat treatment or wet heat treatment.

For the purpose of removing the polymer degradation product from the fabric after the heat treatment, and when the colored ink is applied by the ink jet method, the ink receiving layer remaining on the fabric and the unfixed dye are removed. For the purpose of dropping off, it is preferable to perform a cleaning treatment. As a result, it becomes possible to form a design expression based on a difference between a clearer extracted portion and a non-extracted portion.

Although it does not specifically limit as conditions of a washing process, For example, what is necessary is just to process for 10 to 60 minutes by the hot water processing temperature 70-100 degreeC using the extraction accelerator 1-5g / L.
Furthermore, you may process using 2-15 g / L NaOH aqueous solution.

As the pitting accelerator, aliphatic amine salt cationic surfactant, aliphatic amine salt quaternary ammonium salt cationic surfactant, aromatic quaternary ammonium salt cationic surfactant and heterocyclic quaternary ammonium salt Cationic surfactants can be used.
As described above, the polyester-based polymer can be completely discharged by heat treatment and washing treatment after the removal agent is applied.

According to the present invention, a polyester polymer in which a sheath part is partially made of a fabric having a core part made of a polyamide-based polymer and a sheath part made up of a core-sheath composite fiber made of a polyester-based polymer. And the non-extraction part is formed in an island shape, so that the non-extraction part and non-extraction part are constructed, and the overall size of the fabric does not change during water absorption, and the extraction part is extended by water absorption. However, unevenness can partially appear on the surface of the fabric due to the difference in elongation from the non-extractable portion that does not stretch. Furthermore, the textile product of the present invention using the above-mentioned fabric is any textile product for sports use such as game shirts, athletics and fitness clothing, inner use such as camisole, and fashion clothing use. By using the above-mentioned fabric for such a textile product, it becomes possible to produce a textile product in which unevenness is partially expressed in the fabric, the contact between the fabric and the skin during sweating is reduced, and the feeling of stickiness is eliminated.

EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated in detail, this invention is not limited at all by these. In addition, each physical property in an Example is measured with the following method.

Evaluation item <Thickness change rate>
The sample prepared above is left in an atmosphere of a temperature of 20 ° C. and a humidity of 65% RH for 24 hours, and then a 10 cm × 10 cm piece is cut from the sample (n number = 5). Subsequently, the sample is placed on a flat plate, a load of 0.5 cN / cm ² is applied, and the thickness TD of the sample is measured using a thickness meter manufactured by Peacock. Further, water is applied to the small piece by spraying so that the moisture content becomes 100%, and after one minute has elapsed, the thickness TW is measured under a load of pressure 0.5 cN / cm ^{2 in} the same manner as described above. . The rate of change in thickness is calculated from the above measured numerical values by the following formula.
Thickness change rate (%) = (TW−TD) / TD × 100

<Surface quality>
The quality of the boundary between the extracted part and the non-extracted part The visual quality of the boundary between the extracted part and the non-extracted part was visually determined using a magnifying glass according to the following criteria.
○: The boundary between the non-extraction part and the non-extraction part is clear, and there is almost no fraying such as fluff.
Δ: The boundary between the detached part and the non-extracted part is clear, but some fraying of yarn such as fluff is recognized.
X: The boundary between the non-extraction part and the non-extraction part is unclear, and fraying of yarn such as fluff is recognized.

<Evaluation of wearing comfort during sweating>
T-shirts were sewn with the fabrics produced in the examples and comparative examples, and exercised until sweating, and sensory evaluation was conducted on the wearing comfort against a sticky feeling by five subjects, and the average value was defined as the comfort evaluation.
The average value of the comfort evaluation was 3 or more, ◯, 2 or more and less than 3, and Δ or less than 2.
4: Even if sweating, the clothes do not feel sticky and comfortable. 3: When sweating, the clothes are slightly sticky but comfortable. 2: When sweating, you feel a little sticky, not comfortable. 1: Sense of stickiness when sweating and uncomfortable

Using a compound spinning machine, the sheath component is composed of terephthalic acid, ethylene glycol, 5-sodium sulfoisophthalic acid (1.5 mol% with respect to the acid component), DEG 4.8 mol%, and PEG 3.0 mass% with a molecular weight of 600. Copolymerized polyethylene terephthalate (melting point 237 ° C.), nylon 6 (saturated water content 11% at 23 ° C., melting point 224 ° C.) is melted at 260 ° C. as a core component, spinning temperature 280 ° C., core-sheath ratio 60 ( Nylon 6) / 40 (polyethylene terephthalate) was discharged from the core-sheath melt spinneret, and then cooled to give an oil, and an undrawn yarn was obtained at a winding speed of 800 m / min. Next, the spun undrawn yarn was drawn at a roll heater at 65 ° C., a draw ratio of 3.3 times, a plate heater at 150 ° C., and a drawing speed of 800 m / min. A sheath type composite fiber (fineness: 100 dtex / 48f, strength: 3.51 cN / dtex, elongation: 34%, core exposure: 40%, core-only strength: 2.70 cN / dtex) was obtained.

A knitted fabric (thickness 1 mm) having a Kanoko structure was obtained by using only the fibers prepared above and knitting with a 28 gauge knitting machine. Further, the obtained knitted fabric was subjected to scouring and heat setting under general conditions to obtain a knitted fabric of Kanoko structure having a basis weight of 130 g / m ² .

Next, the knitted fabric was subjected to a discharging process according to the following method.
Formation of Ink Receiving Layer The treatment liquid obtained by mixing the composition of Formula 1 and stirring for 1 hour using a homogenizer is added to the knitted fabric obtained above so that the solid content is 2 g / m ^2. The knitted fabric was applied by a dip nip method and dried at 170 ° C. for 2 minutes to obtain a knitted fabric on which an ink receiving layer was formed.

Formula 1
DKS Fine Gum HEL-1: 2% by mass
(Daiichi Kogyo Seiyaku Co., Ltd., etherified carboxymethylcellulose)
MS liquid: 5% by mass (Madesei Chemical Industry Co., Ltd., nitrobenzene sulfonate, reduction inhibitor, active ingredient 30%)
Water: 93% by mass

Preparation of extractable ink After mixing the composition of Formula 2 and stirring for 1 hour using a stirrer, ADVANTEC high purity filter paper No. 1 was prepared. After filtration under reduced pressure with 5A (manufactured by Toyo Filter Paper Co., Ltd.), vacuum deaeration treatment was performed to obtain a dischargeable ink. The viscosity at 25 ° C. was 3 cps.

Formula 2 (exhaustable ink)
Guanidine carbonate (extraction agent): 20% by mass
Urea (dissolution stabilizer): 5% by mass
Diethylene glycol (anti-drying agent): 5% by mass
Water: 70% by mass

The non-contact part is formed in a square island shape with a side of 4 mm (maximum diameter 5.66 mm), and is touched by inkjet printing under the following conditions so that the distance between the squares is 1 mm as shown in FIG. Went.

Inkjet printing conditions Printing apparatus: On-demand serial scanning inkjet printing apparatus Nozzle diameter: 50 μm
Drive voltage: 100V
Frequency: 5kHz
Resolution: 360 dpi
Ejectable ink printing amount: 40 g / m ²

After discharging, the knitted fabric was dried and further subjected to wet heat treatment at 175 ° C. for 10 minutes using an HT steamer. Furthermore, in a soaping bath containing 2 g / L of Tripol TK (Daiichi Kogyo Seiyaku Co., Ltd., nonionic surfactant), 2 g / L of soda ash, and 1 g / L of hydrosulfite at 80 ° C. for 10 minutes. After the treatment and washing, the fabric was washed with water and dried to obtain a water-absorbing structure-changing fabric having an extracted portion and a non-extracted portion. The evaluation results are shown in Table 1.

The same method as in Example 1 is applied to the knitted knitted fabric produced in Example 1 so that the non-contact portion is a circle with a diameter of 4 mm and is randomly arranged so that the interval between adjacent circles is in the range of 1 to 4 mm. A touch part was created to obtain a desired water-absorbing structure change fabric. The evaluation results are shown in Table 1.

The front side uses the core-sheath type composite fiber A used in Example 1, the back side uses nylon 6 (78 dtex / 24f), and is knitted by a 28-gauge knitting machine. Thread: nylon thread = 60: 40).
Change in water absorption structure in which the non-extracted portion having a square shape (maximum diameter of 5.66 mm) with a side of 4 mm was removed from the fabric in the same manner as in Example 1 so that the interval between the non-extracted portions was 1 mm. A fabric was created. The evaluation results are shown in Table 1.

After discharging from a normal core-sheath melt spinneret at a core-sheath ratio of 60 (nylon 6) / 40 (polyethylene terephthalate) under the same spinning conditions as in Example 1, the core-sheath type of the fiber cross section of FIG. A composite fiber (fineness: 100 dtex / 48f, strength: 3.78 cN / dtex, elongation: 43.5%, core exposure: 0%, core-only strength: 2.9 cN / dtex) was obtained.
Using the core-sheath type composite fiber of FIG. 1 (D), it manufactured and processed like the Example, and obtained the knitted fabric of the fabric weight of 133 g / m < ² > Kanoko. Furthermore, it processed like Example 1, and the water absorption structure change fabric was obtained. The evaluation results are shown in Table 1.

[Comparative Example 1]

In the same manner as in Example 1, the non-contact portion has a pattern in which the non-contact portion has a grid shape with a width of 1 mm and an interval of 4 mm, using only the core-sheath type composite fiber A. A fabric was obtained. The evaluation results are shown in Table 1.

[Comparative Example 2]

In the same manner as in Example 1, the non-contact portion was formed into a square having a side of 50 mm and a distance of 1 mm (maximum diameter: 70.7 mm) using the core-sheath type composite fiber A alone in the same manner as in Example 1. A fabric having such a pattern was obtained. The evaluation results are shown in Table 1.

[Comparative Example 3]

In the same manner as in Example 1, the non-contact portion is a square with a side of 4 mm (maximum diameter: 5.66 mm) and the interval is 25 mm. A fabric having such a pattern was obtained. The evaluation results are shown in Table 1.

[Comparative Example 4]

By wrapping nylon 6 (Toray Industries, Inc., 78 dtex / 24f) with a cationic dyeable polyester false twisted yarn (Toray, 56 dtex / 36f) at a spindle rotation speed of 10500 rpm and a twist number of 650 (Z twist) T / m A nylon 6 / polyester composite twisted yarn was obtained.
Using the obtained composite coated yarn, a sword knitted fabric similar to that of Example 1 was prepared, and the obtained knitted fabric was scoured and set under general conditions to obtain a knitted fabric of a sword knitting structure having a basis weight of 140 g / m ^2. It was. Further, in the same manner as in Example 1, a fabric having a pattern in which the non-contact portion was a square (maximum diameter 5.66 mm) with a distance of 1 mm and a side of 4 mm was obtained. The evaluation results are shown in Table 1.

[Comparative Example 5]

The ratio of the core-sheath type composite fiber was changed to 10 (nylon 6) / 90 (polyethylene terephthalate), and the core-sheath type composite fiber (fineness: 100 dtex / 48f, strength: 3) in the cross section of the fiber of FIG. .21 cN / dtex, elongation: 44.5%, core exposure: 5%, strength of core portion only: 0.7 cN / dtex) was manufactured and processed in the same manner as in Example 1, and the basis weight was 132 g / A knitted fabric of m ² Kanoko organization was obtained. Furthermore, it processed like Example 1 and obtained the fabric. The evaluation results are shown in Table 1.

[Comparative Example 6]

The ratio of the core-sheath type composite fiber was changed to 90 (nylon 6) / 10 (polyethylene terephthalate), and the core-sheath type composite fiber (fineness: 100 dtex / 48f, strength: 4) in the cross section of the fiber of FIG. .36 cN / dtex, elongation: 47.8%, core exposure: 35%, strength of core only: 3.96 cN / dtex) was manufactured and processed in the same manner as in Example 1, and the basis weight was 130 g / A knitted fabric of m ² Kanoko organization was obtained. Furthermore, it processed like Example 1 and obtained the fabric. The evaluation results are shown in Table 1.

DESCRIPTION OF SYMBOLS 1 ... Fabric 2 ... Contact part 3 ... Non-contact part 4 ... Core part (polyamide-type polymer)
5 ... Sheath (polyester polymer)

Claims (3)

  A woven or knitted fabric using a core-sheath type composite yarn having a core-sheath-type composite yarn having a cross-sectional area ratio of 20/80 to 80/20 of a core-sheath made of a polyamide polymer and a sheath made of a polyester-based polymer. The polyester-based polymer of the core-sheath type composite yarn has a contact portion and a non-contact portion that are removed, and the non-extraction portion is arranged in an island shape with respect to the removal portion. A water-absorbing structure-changing fabric having a maximum diameter of a touch part of 3 to 20 mm and an interval between non-contact parts of 0.5 to 20 mm. The water-absorbing structure-changeable fabric according to claim 1, comprising 40% or more of the core-sheath type composite yarn by weight of the fabric. The water absorption structure-change fabric according to claim 1 or 2, wherein the thickness change rate of the fabric before and after water absorption is 5 to 20%.

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