JP6284605B2 - Stretchable fabric and method for producing the same - Google Patents

Description

  The present invention relates to a stretchable fabric having excellent stretchability, elasticity and stretch recovery, high dyeing fastness and soft texture, and a method for producing the same.

  Conventionally, fabrics that stretch well are often used as inners such as shorts, girdles, and bras, or shirts for sports. In order to give the fabric stretchability, it can be made into a fabric that stretches vertically using a knitted fabric composed of loop connections, or in order to give the yarn itself stretchability, false twisting, shaping, etc. Crimping is performed to make crimped yarn. However, these methods have a problem that a so-called wallai phenomenon occurs in which the stretched and stretched fabric does not completely return to its original state and becomes loose.

  In order to solve such a problem, a stretch lining using polytrimethylene terephthalate fibers as false twisted yarn has been proposed (see Patent Document 1). This is an improvement in stretchability by using, as a raw material, polytrimethylene terephthalate having relatively high elasticity instead of polyethylene terephthalate. However, this method has problems such as having to use a polyester of a type that is not generally used, and facilitating a decrease in dyeing fastness. Further, this method alone does not provide sufficient stretchability and stretch recovery properties.

  Therefore, a method has been proposed in which a polytrimethylene terephthalate fiber is made into a pre-twisted false twisted yarn, and a fabric having excellent stretchability and stretch recovery property and having a soft texture can be obtained (see Patent Document 2). However, in this method, since the torque of the obtained pre-twisted false-twisted yarn is strong, knitting tends to be difficult, and the above-mentioned problems still remain.

  On the other hand, woven or knitted fabrics that stretch well and shrink well by mixing elastic yarns such as urethane-based spandex with excellent extensibility and stretch recovery have been made. Woven and knitted fabrics using elastic yarn are used for applications such as spats, swimsuits, sports underwear, etc. that closely follow body movements. However, such a knitted fabric using elastic yarn has a low dyeing fastness, a low durability, and requires attention in handling. In addition, in white and light clothing, there was a concern that the discoloration of urethane was conspicuous during the consumption process and the clothing appeared to turn yellow.

Japanese Patent Laid-Open No. 11-93031 WO01 / 000912 publication

  The present invention has been made in view of the current state of the prior art described above, and the object thereof is to obtain extensibility and elasticity, and elongation recovery without including an elastic yarn in the fabric, and is excellent. An object of the present invention is to provide a fabric having a fastness to dyeing and a soft texture, and a method for producing the fabric.

  As a result of intensive studies to achieve the above-mentioned object, the present inventor, as a result of softly immersing a fabric containing crimped yarns in a treatment bath containing an elastomer resin compound, The filament single yarns are kept in an independent state without adhesion and aggregation with the elastomer resin, and as a result, it has been found that a fabric having a soft texture and excellent stretchability and elasticity can be obtained. It came.

That is, the present invention has the following configuration (1).
(1) A fabric composed only of polyethylene terephthalate crimped yarn, and an elastomer resin compound composed of a copolymer of dimethyl terephthalate, ethylene glycol and polytetramethylene glycol having a number average molecular weight of 10,000 to 35,000 is attached to the fiber surface of the fabric. And the single yarns of the fibers contained in the fabric are not adhered and agglomerated due to adhesion of the elastomer resin compound, and are kept in a single state, the fabric is a circular knitting, and the yarn of crimped yarn The length is 200 to 400 mm / 100 W, the number of loops is 1000 to 5000 / inch ² , the elongation in the longitudinal direction and the weft direction is 30 to 150%, and the elongation recovery rate is 94 to 99%. A stretchable fabric having a hysteresis loss of 30 to 60%.

  The stretch fabric of the present invention can be stretched and shrunk without using elastic yarn, and the texture is soft, so that it can follow the movement of the body such as spats, swimwear, sports underwear, etc. Can be suitably used.

FIG. 1 is a photograph of the fiber surface of the stretchable fabric obtained in Reference Example 1. FIG. 2 is a photograph of the fiber surface of the fabric obtained in Comparative Example 1. FIG. 3 shows a woven structure diagram of Reference Example 5.

  Hereinafter, the stretchable fabric of the present invention and the production method thereof will be described in detail.

  The stretchable fabric of the present invention contains 30% by weight or more of crimped yarn, the elastomer resin compound is adhered to the fiber surface of the fabric, and the single fiber fibers contained in the fabric are adhered to the elastomer resin compound. It is characterized in that there is no adhesion aggregation due to, and it maintains a single state. In the present invention, “single yarns do not adhere and agglomerate and remain in an independent state” means that the multifilament contained in the fabric is photographed with an electron microscope and 50% or more of the single yarns are in other single yarns. Says that it is not bonded to the thread.

  Although the elastomer resin compound has adhered to the fiber surface of the fabric, FIG. 1 (fiber surface of the fabric of Reference Example 1) is illustrated as a specific example in which the single yarns are not adhered and aggregated to maintain a single state. . In FIG. 1, the elastomer resin compound is adhered to the surface of the fiber, but it can be seen that there is no adhesion aggregation due to the adhesion of the resin between the single yarns of the fiber, and the fiber maintains a single state. As a result, it is possible to achieve both soft texture and excellent elasticity. In order to achieve such an adhesion state, in the present invention, it is preferable to apply an elastomer resin compound to the fabric by an exhaust method. Examples of the apparatus for attaching the resin by the exhaust method include a liquid dyeing machine, an airflow dyeing machine, a wins dyeing machine, a paddle dyeing machine, a drum dyeing machine, and a beam dyeing machine. In the present invention, it is possible to obtain stretchability and elasticity, soft texture, and further high dyeing fastness, particularly by attaching the resin while being softly pliable in the liquid. For this reason, a liquid dyeing machine, an airflow dyeing machine, and a drum dyeing machine with strong soft cloth power are preferably used. In addition, the photograph of the fiber surface which made the elastomer resin compound adhere by the padding method generally used is shown in FIG. 2 (fiber surface of the fabric of the comparative example 1). In FIG. 2, it can be confirmed that adhesion and aggregation of single yarns occur on the fiber surface to which the resin is adhered without soft cloth.

  Examples of the elastomer resin compound used in the present invention include conventionally known ones such as polyester elastomers, polyurethane elastomers, acrylic elastomers, diene elastomers, polyolefin elastomers, and polyester elastomers are preferred. This polyester elastomer resin compound is preferably an elastomer resin compound having an aromatic polyester as a hard segment and an aliphatic polyether or aliphatic polyester as a soft segment.

  Hard segment aromatic polyesters include homopolymers such as polyethylene terephthalate, polytetramethylene terephthalate, polyoxybenzoate, and copolymers such as polyethylene terephthalate and ethylene isophthalate containing small amounts of different acid or glycol components. Among them, polyethylene terephthalate is preferably used from the viewpoint of the durability of the resin film formed on the fiber surface. Examples of the acid component of the aromatic polyester include 5-sodium sulfoisophthalic acid and trimellitic anhydride, which may include a sulfonic acid or a carboxyl group.

  Examples of the aliphatic polyether of the soft segment include polytetramethylene glycol, polypropylene glycol, polyethylene glycol, and polyalkylene ether glycol which is an alkylene oxide adduct having 2 to 6 repeating units of the above glycol. In addition, the aliphatic polyester has 2 to 6 carbon atoms in a glycol repeating unit such as polyethylene separate, polypropylene adipate, polytetramethylene adipate, polytetramethylene separate, or a polyester comprising dodecanedicarboxylic acid and tetramethylene glycol. Specific aliphatic polyesters or copolymers of these aliphatic polyester components. Of these, polytetramethylene glycol is preferably used. The molecular weight of the aliphatic polyether or aliphatic polyester is preferably 200 to 8000, more preferably 600 to 2500. If the molecular weight is smaller than this range, it tends to volatilize out of the polymerization system in the polymerization stage, and if it is larger than this range, the solubility in the polymerization system becomes insufficient and it is difficult to obtain a uniform product.

  The weight ratio of the polyester component to the polyalkylene glycol component in the polyester elastomer resin compound is preferably 20:80 to 60:40. If the polyalkylene glycol component is less than 40% by weight, sufficient stretch performance cannot be obtained for the elastomer resin, and if it is greater than 80% by weight, a highly durable elastomer resin compound is difficult to obtain.

  The number average molecular weight of the polyester elastomer resin compound is preferably 5,000 to 38,000, more preferably 10,000 to 35,000. If the number average molecular weight is less than this range, the strength of the formed film is insufficient, and the elasticity of the fiber fabric and its durability tend to be reduced. If the number average molecular weight exceeds this range, the viscosity of the resin becomes too high. It becomes difficult to obtain a fine and stable emulsion.

  The form of the fabric is not particularly limited, and any of a woven fabric, a knitted fabric, and a nonwoven fabric may be used. The structure of the woven or knitted fabric is not particularly limited. For example, weft knitting structures include flat knitting, rubber knitting, double-sided knitting, pearl knitting, tuck knitting, floating knitting, one-sided knitting, lace knitting, bristle knitting, etc. Is preferred. These are basic structures of a double knit, and are suitable knitting structures for giving stretchability and high density to the fabric. More preferable specific structures are interlock, Milan rib and the like.

  In the case of weft knitting (round knitting), the yarn length of the yarn to be knitted may be appropriately adjusted according to the knitting machine gauge, the knitting structure, and the yarn thickness. The length of the crimped yarn is 200 to 400 mm per 100 W (wale), particularly preferably 250 to 400 mm, in order to effectively express elasticity and stretch recovery.

Further, it is preferable that the number of loops per unit area of the crimped yarn and the knit yarn is designed to be 1000 to 5000 / m ² in the finished. More preferably, it is 1500-4000 pieces / m ² . When the number of loops is less than the above range, the hysteresis loss of the knitted fabric increases and the stretch recovery property of the knitted fabric tends to decrease. When the number of loops exceeds the above range, the texture of the knitted fabric tends to become hard.

  Examples of the warp knitting organization include single denby knitting, single atlas knitting, double cord knitting, half knitting, half base knitting, satin knitting, half tricot knitting, back hair knitting, jacquard knitting and the like. Preferred structures are half, open denby and the like.

  In the case of warp knitting, the yarn length of the yarn to be knitted may be appropriately adjusted according to the knitting machine gauge, the knitting structure, and the thickness of the yarn. In order to effectively express elasticity and stretch recovery, the preferred length of the crimped yarn is 900 to 2200 mm, particularly preferably 1000 to 2000 mm per rack.

Further, the number of loops per unit area including the crimped yarn and the knit yarn is preferably 1500 to 6000 pieces / inch ² in the finish. More preferably 2,000 to 5,000 pieces / inch ^2, even more preferably from 2,500 to 4,000 pieces / inch ^2. When the number of loops is less than the above range, the hysteresis loss of the knitted fabric increases and the stretch recovery property of the knitted fabric tends to decrease. When the number of loops exceeds the above range, the texture of the knitted fabric tends to become hard. The number of loops is determined by measuring the number of courses and wales per inch by leaving the knitted fabric flatly dried for 24 hours in an environment of 20 ° C. and 65% RH. calculate.

  Examples of the woven 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. Preferred tissues include plain weave poplin, tropical, twill weave and cashmere. The number of layers of the woven or knitted fabric or the nonwoven fabric may be a single layer or a multilayer of two or more layers.

When the fabric is a woven fabric, the cover factor (CF) of the woven fabric is preferably 1000 to 2500. More preferably, it is 1200-2100. When the CF is less than the above range, the kickback property and the stretch recovery property are likely to be lowered. Moreover, if it exceeds the above range, the extensibility tends to be lowered. In the present invention, the cover factor (CF) of the woven fabric is calculated by CF = √warp fineness dtex × warp density + √weft fineness dtex × weft density.
In the case of a woven fabric, a crimped yarn may be used for both the warp and the weft, or may be used for either one. When used on only one side, stretchability can be effectively expressed only on one side.

  In order to obtain the stretchability and elasticity of the fabric, it is preferable to use 30% by weight or more of long fibers based on the entire fabric. When the elastomer resin compound is adhered to the fiber, each single fiber is easy to move at the contact portion between the long fibers, and it becomes easy to obtain elasticity and a soft texture. Even when mixed spun yarn is used, it is preferable to use spun yarn with less fluff. As a method for reducing the fluff, it is preferable to use a spinning method with less fuzz such as compact spinning or MVS, to give a strong twist, or to burn the yarn.

  In the present invention, the elastomer resin compound is adhered while the fabric is sufficiently relaxed while shrinking the fabric with a soft fabric or without applying a strong tension to the previously-shrinked fabric. In order to develop extensibility, it is necessary to apparently sufficiently shrink the fabric in any step of the dyeing process. When the shrinkage rate is shrunk by 10 to 50% as an average in the direction of the weft, preferable stretchability can be obtained. More preferably, it is 15 to 40%. Since the apparent shrinkage rate in the dyeing process is within this range, it is preferable to set the yarn length of the circular knitting and the warp knitting as described above.

  The crimped yarn used in the present invention refers to a processed yarn obtained by crimping a long fiber by false twisting or shaping. By using the crimped yarn, crimp is expressed by heat or soft cloth force during the dyeing process, and the fabric can be apparently contracted, and the stretchability and stretch recovery property of the fabric are further improved. It becomes possible. The amount of crimped yarn used is preferably 30 to 100% by weight of the entire fabric. More preferably, it is 40 weight% or more, More preferably, it is 50 weight% or more. Examples of the raw yarn used for crimping include polyester, nylon, rayon long fiber, acetate, and the like. Polyester fiber is preferably used from the viewpoint of durability of expansion and contraction of the fabric.

  Polyester fibers used for crimping are preferably those made of polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, stereocomplex polylactic acid, polylactic acid, polyester copolymerized and / or blended with a third component, or the like.

  Examples of nylon fibers used for crimping include those made of polyamides such as nylon 6, nylon 66, nylon 46, nylon 12, nylon 610, nylon 612 or copolymers thereof. Of these, nylon 6 and nylon 66 are preferably used.

  When false twisting is used as the crimping process, heat fixing is performed by heating only the first heater and fixing the false twist (1 heater false twist), and heating both the first heater and the second heater. Thus, there is a method of fixing by false twist (two heater false twist), and any method can be adopted.

  The crimp elongation of the false twisted yarn is preferably 20% to 60%. More preferably, it is 30 to 50%. When the crimp elongation rate is within this range, the stretchability of the finished fabric is maintained. The crimp restoration rate of the false twisted yarn is preferably 15 to 30%. When the crimp restoration rate is within this range, the kickback property of the knitted fabric is more likely to be improved.

  For the fiber material forming the fabric, a matting agent, a fine pore forming agent (for example, an organic sulfonic acid metal salt, etc.), a cationic dye dyeing agent (for example, as long as the object of the present invention is not impaired). For example, isophthalic acid sulfonium salt, etc.), antioxidant (eg, hindered phenol-based antioxidant), heat stabilizer, flame retardant (eg, antimony trioxide), fluorescent whitening agent, colorant, antistatic An agent (for example, sulfonic acid metal salt, etc.), a hygroscopic agent (for example, polyoxyalkylene glycol, etc.) and the like may be contained.

  The single yarn fineness, the total fineness, and the number of filaments of the fiber used in the fabric of the present invention are not particularly limited, but the single yarn fineness is preferably 0.1 to 5 dtex or less, more preferably in terms of not impairing the soft texture of the fabric. 0.5 to 3.5 dtex. If the single yarn fineness is less than the above range, it will be difficult to obtain sufficient kickback and stretch recovery properties for the finished fabric, and if it is above the above range, the fabric will be too hard and the texture will tend to be poor. . The total fineness is preferably 10 to 500 dtex, more preferably 30 to 220 dtex. If the total fineness is less than the above range, the fabric becomes too thin, the stretch recovery property is lowered, and cracking easily occurs. When the above range is exceeded, the cloth becomes too thick and heavy, and the wearing comfort tends to be lowered.

  The form of the single fiber constituting the crimped yarn is not particularly limited. The cross-sectional shape of the single fiber is appropriately selected from circles, triangles, flats, hollows, and the like depending on the application. The multifilament may be subjected to normal false twisting, normal air processing such as taslan processing or interlace processing, and twisting processing. Furthermore, the fabric may be configured as a composite yarn composed of a plurality of yarns.

  The fabric of the present invention can contain fiber materials other than the crimped yarn as long as the stretch characteristics of the present invention can be obtained. The fiber material is not particularly limited, and examples thereof include natural fibers such as cotton, silk, hemp, and wool, semi-synthetic fibers such as rayon, cupra, and acetate, and synthetic fibers such as polyester, nylon, acrylic, and polypropylene. . Moreover, you may use as composite yarns, such as a dissimilar fiber material, the mixed yarn which mixed the long fiber and the single fiber, and the spun yarn. As the fiber that easily exhibits the stretch properties of the present invention, it is preferable to use a synthetic fiber, and it is more preferable to use a long fiber. Particularly preferably, when a fiber material of the same type as the crimped yarn to be used is used, the productivity is easily controlled without deteriorating the productivity.

  Such a fabric of the present invention can be produced, for example, by the following production method. That is, the elastomer resin compound is emulsified in advance, the fabric is immersed in a treatment solution containing the emulsion, and softly treated in a treatment bath, and the elastomer resin compound in the treatment solution is adhered to at least the fiber surface of the fabric. By doing so, the stretchable fabric of the present invention is obtained.

  Here, the means for emulsifying the elastomer resin is not particularly limited, but it is generally emulsified with the aid of an organic solvent and / or a surfactant. Depending on the composition, self-emulsification is also possible. Protective glue may be added to stabilize. Usually, emulsions are used as dispersants, such as nonionic, anionic, cationic, amphoteric, nonionic anionic surfactants, alone or in combination, especially alkylene oxide addition type ether type or ester type nonion. A nonionic anionic system in which the surfactant is esterified with sulfuric acid or sulfonated with propane sultone is preferred. Specific examples of such dispersants include monohydric or polyhydric alcohols and phenols such as higher alcohols, alkylphenols, alkylphenylphenols, benzylphenols, sorbitan fatty acid esters, higher alkylamines, higher alkyl mercaptans, higher fatty acid amides. , A surfactant obtained by adding 5 to 100 mol, preferably 10 to 60 mol, of alkylene oxide to higher fatty acid or the like, or a salt obtained by further esterification with sulfuric acid, phosphoric acid or the like, or a salt obtained by sulfonation with propane sultone Etc. When an anionic group is introduced, the number of added moles of alkylene oxide may be further reduced. Pluronic and tetronic nonionic surfactants are also preferred types of dispersants. As a preferred method, a dispersant is preferably added in an amount of 5 to 35% by weight, more preferably 20 to 30% by weight with respect to the polyester-based elastomer resin, and preferably melted in an inert air flow atmosphere such as nitrogen. It is prepared in advance and is preferably added little by little with stirring into an alkaline solution heated to 50 to 95 ° C., for example, a 0.5 to 5% by weight aqueous solution of alkanolamine. In this way, a milky white dispersion can be prepared.

  The concentration of the elastomer resin contained in the treatment liquid is 0.05 to 20% by weight, more preferably 0.2 to 10% by weight, and particularly preferably 0.5 to 5.0% by weight with respect to the weight of the fabric. When the concentration of the resin is larger than the above range, the multifilament single yarns contained in the fabric may be aggregated and adhered to each other. On the contrary, if the resin concentration is smaller than the above range, sufficient elasticity may not be obtained.

  Moreover, the temperature of the treatment bath is preferably 20 to 140 ° C, more preferably 70 to 110 ° C. If the temperature of the treatment bath is lower than the above range, the exhaust amount of the elastomer resin into the multifilament may be reduced and the elasticity may not be obtained. On the other hand, when the temperature of the treatment bath is higher than the above range, the fastness is lowered and the reproducibility of the dyed color tends to be lowered.

  The time for immersing the fabric in the treatment bath is preferably 10 to 120 minutes, more preferably 20 to 60 minutes. When the immersion time is shorter than the above range, the amount of the resin adhering to the fiber tends to decrease. Even if the above range is exceeded, further improvement in the effect is difficult to obtain, and the required energy and time are likely to be wasted.

  In the treatment bath, a crosslinking agent, a hydrophilic processing agent, a softening agent, an antifoaming agent, an antibacterial agent, a water repellent, an antibacterial agent for cross-linking the resin, as long as the main purpose of the present invention is not impaired. Various functional agents such as an electric agent may be appropriately contained.

  The treatment process is not limited as long as the desired performance is obtained at any timing of the simultaneous dyeing process or before or after the dyeing process.

  After performing the exhaustion process as described above, it is preferable to perform a cleaning process, a drying process, and a heat setting process. However, in order to maintain high dyeing fastness, the heat setting temperature should be as low as possible. The heat setting temperature is preferably 100 to 180 ° C, more preferably 120 ° C to 160 ° C.

  In the stretchable fabric of the present invention, as long as the object of the present invention is not impaired, conventional dyeing, raising, hydrophilic processing, ultraviolet shielding or antistatic agent, antibacterial agent, deodorant, insect repellent Various processings that impart functions such as an agent, a phosphorescent agent, a retroreflective agent, and a negative ion generator may be additionally applied.

The stretch properties of the fabric of the present invention can be such that when the fabric is a knitted fabric, the elongation is 30 to 150% and the stretch recovery property is 94 to 99%. Further, the hysteresis loss at 30% elongation is 30 to 60%, and it is possible to have sufficient expansion / contraction performance without using elastic yarns. When the present invention is a woven fabric, the elongation in the warp direction and / or the weft direction may be 10 to 50%, and the stretch recovery property may be 80 to 100%. Moreover, the hysteresis loss at the time of 5% elongation is 3 to 40%, and can have sufficient stretchability as a stretchable fabric. Hysteresis loss is determined by measuring the forward stress and the backward stress up to a stretch rate of 30% (5% for woven fabrics) in a knitted fabric in a tensile test in the warp direction or the weft direction of the fabric. It is requested from.
Hysteresis loss (%) = {(Outward stress at 30% during elongation) − (Return stress at 30% elongation)} ÷ (Outward stress at 30% elongation) × 100

  Since the stretchable fabric of the present invention is excellent in stretchability, elasticity and stretch recovery properties as described above, and has high dyeing fastness and soft texture, sports clothing, fashion clothing, fabric for gloves, and hat fabric It is suitable for etc.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated concretely, this invention is not limited to these Examples. In addition, evaluation of the characteristic value in an Example depended on the following method. In the examples, “parts” represents parts by weight.

(1) Crimp elongation (%)
Using a lap reel (circumferential length: 1.125 m) having an appropriate tension adjusting device, a load of 1/10 (g / d) is applied to make an 8-wind kite. This is put on a hook and immersed in hot water at 100 ° C. for 5 minutes under no load. The sample is taken out of hot water and left in a wet state (2/10) × 8 × 2 × g of display denier g. Apply a load and measure the length (a) after 1 minute. Next, the load was removed, and the sample was dried for 30 minutes with a dryer at 60 ± 2 ° C. with no load applied, and left in the standard test room for 1 hour or more, then (2/1000) × 8 × An initial load of 2 × display denier g is applied and the length (b) after 1 minute is measured. The crimp expansion rate is calculated by the following formula using the values of a and b described above. The number of tests shall be two or more and expressed as the average value (up to one decimal place).
Crimp elongation (%) = (ab−a) × 100

(2) Expansion / contraction restoration rate Using a lap reel (scale measuring instrument, frame circumference 1.000 m) equipped with a tension adjusting device, an initial load of 0.1 cN / dtex is applied to prepare a 10-cm skein (1000 m). . This skein is wrapped in gauze and subjected to hot water treatment at 90 ± 2 ° C. for 20 minutes. Then, after dehydration, it is air-dried in a horizontal state for 24 hours in a standard state of 20 ° C. × 65% RH. Next, the skein length (L3) is measured 120 seconds after applying a load of 0.1156 cN / dtex to the skein in 20 ° C. water. For this skein, the load was changed from 0.1156 cN / dtex to 0.00227 cN / dtex, and the skein length (L4) was measured 120 seconds after the load was applied in the same manner. Next, the expansion / contraction restoration rate is calculated by the following formula using the values of L3 and L4. The measurement is repeated 10 times, and the average value of 10 times is taken as the measured value.
Expansion / contraction restoration rate = ((L3-L4) / L3) × 100 (%)

(3) Elongation rate of fabric The JIS-L-1096D method (constant load), the load was 490.4 cN.

(4) 30% elongation stress and elongation recovery rate of knitted fabric Conforms to JIS-L-1096B method. Constant speed extension type Tensile speed 20 cm / min, recovery speed 20 cm / min, gripping distance 10 cm Repeat once.

(5) 5% elongation stress and elongation recovery rate of woven fabric Conforms to JIS-L-1096B method. Constant speed extension type Tensile speed 20 cm / min, recovery speed 20 cm / min, gripping distance 10 cm Repeat once.

(6) Texture (softness)
Sensory evaluation by tactile sensation by five experts was performed according to the following criteria.
○: Soft, △: Neither, x: Hard (7) Single yarn contact state The surface of the multifilament contained in the fabric is arbitrarily photographed with a scanning electron microscope at 10 locations (500 times magnification) and bonded. If the agglomerated part is within 0.5 on average of 10 photos (within 1 photo in 2 photos), “Independent” is displayed as “There is no adhesion and aggregation is maintained” Otherwise, “convergence” is displayed. In addition, the state which has adhered and aggregated means a state as shown by the arrow of FIG.
(8) Dye fastness (wet friction fastness)
The wet friction fastness was measured according to JIS-L0849-II method (Gakushin Type Tester).

Production of elastomer resin emulsion <Emulsion solution of resin A>
388 parts of dimethyl terephthalate, 248 parts of ethylene glycol, 1000 parts of polytetramethylene glycol (number average molecular weight 1000), and 0.17 part of zinc acetate are added to a reaction vessel equipped with a thermometer, a stirrer, and a partial reflux condenser. Then, a transesterification reaction was carried out at 140 to 210 ° C. for 4 hours, and then the reaction system was heated to 210 ° C. to 250 ° C. over 1 hour while reducing the pressure to remove excess ethylene glycol. A time polycondensation reaction was performed to obtain a resin A having a reduced viscosity of 1.10 and a number average molecular weight of 30,000. The weight ratio of the polyalkylene glycol component in Resin A was 69%.
10 parts of this resin was mixed with 3 parts of polyoxyethylene oleyl ether (HLB value 18), melted at 250 ° C. in a nitrogen stream, and this melt was prepared in advance at 90 ° C. monoethanolamine 1% aqueous solution. The mixture was poured into 87 parts of the mixture with stirring and stirred for 30 minutes to obtain an emulsion solution having a stable resin A component of 10% by weight.

<Emulsion solution of resin B>
Instead of polytetramethylene glycol, a block copolymer (number average molecular weight 2000) obtained by copolymerizing polyethylene glycol and polytetramethylene glycol at a weight ratio of 1: 1 was used in the same manner as for resin A. Resin B was produced to obtain an emulsion solution containing 10% by weight of the component of Resin B. At this time, the weight ratio of the polyalkylene glycol component in the resin B was 74%, and the number average molecular weight was 32,000.

(Reference Example 1)
First, a 56 dtex / 24 filament (fil.) False twisted yarn (one-stage heater) made of polyethylene terephthalate, made by Toyobo Co., Ltd., is used as L1, and a semidull round cross section made of polyethylene terephthalate is 56 dtex / 36 fil. No. raw silk (manufactured by Toyobo Co., Ltd.) was used for L2, and warp knitting was performed with a half structure under the following conditions.
The knitting machine is a Nihon Meyer KS machine, the knitting gauge is 28G,
L1: 10/12 runner is 1280mm
L2: 23/10 The runner was adjusted to 1820 mm.
The finished machine was 50 / inch course and 28 / inch wale.

Next, this wet machine is pre-wet treated, then scoured in a conventional manner using a liquid flow dyeing machine (Circular NS) manufactured by Hisaka Seisakusho, followed by high-pressure dyeing with the following dyeing prescription It was. Thereafter, the temperature was once lowered, and after reduction cleaning, the polyester elastomer resin was uniformly exhausted into the knitted fabric by performing a soft cloth treatment while being immersed in the treatment bath of Formulation 1. Thereafter, washing with hot water and washing with water were performed and the product was taken out from the dyeing machine. Thereafter, centrifugal dehydration was performed and final setting was performed at 150 ° C. to obtain a stretch knitted fabric. The finished knitted fabric had a course number of 63 / inch, a wale number of 48 / inch, and a basis weight of 163 g / m ² . As shown in FIG. 1, the SEM photograph of the fiber surface of the obtained stretch knitted fabric shows that the multifilament single yarns contained in the fabric are not coherently adhered to each other (95% or more of single yarns are in other states). It was not in close contact with the single yarn). The details of the knitted fabric and the evaluation results are shown in Table 1.

<Dyeing prescription>
Dianix Black HG-FS conc. (Dyster) 3% owf (on the weight of fiber)
Leveling agent Disper TL (manufactured by Meisei Chemical Co., Ltd.) 1g / L
pH adjuster Acetic acid (10% aqueous solution) 1 g / L
Treatment temperature 130 ° C, treatment time 45 minutes Bath ratio 1:12
<Reduction cleaning>
Hydrosulfite 2g / L
NaOH 1g / L
Treatment temperature 80 ° C, treatment time 15 minutes Bath ratio 1:12
<Prescription 1>
Emulsion solution of polyester elastomer resin A 3% owf
Hydrophilic processing agent (SR1800, Takamatsu Yushi Co., Ltd.) 0.5% owf
Treatment temperature 110 ° C., treatment time 30 minutes, bath ratio 1:12

(Reference Example 2)
A stretch knitted fabric was obtained in the same manner as in Reference Example 1 except that the concentration of the emulsion solution of polyester elastomer resin A in Formulation 1 was changed to 1% owf. The details of the knitted fabric and the evaluation results are shown in Table 1.

(Reference Example 3)
A stretch knitted fabric was obtained in the same manner as in Reference Example 1 except that an emulsion solution of polyester elastomer resin B was used instead of the emulsion solution of polyester elastomer resin A in formulation 1. The details of the knitted fabric and the evaluation results are shown in Table 1.

Example 4
Circular knitting was knitted with a tengu structure in a circular knitting machine 3FA made by Fukuhara Seiki, with 110 dtex / 48 fil false twisted yarn (single-stage heater) made of polyethylene terephthalate having a circular cross section. At this time, the knitting gauge was 28G, the diameter was 30 inches, and the knitting conditions were adjusted to 280 mm / 100 wale. The finished green machine was processed according to Reference Example 1 to obtain a stretch knitted fabric. The details of the knitted fabric and the evaluation results are shown in Table 1.

(Reference Example 5)
A single-stage heater false twisted yarn (manufactured by Toyobo Co., Ltd.) of polyethylene terephthalate with a semi-dull cross section of 22 dtex / 24 fil is used as the warp and the same yarn is used as the weft. The top fabric was woven. The raw machine has a warp density of 178 lines / inch and a weft density of 172 lines / inch. The details and evaluation results of this fabric are shown in Table 1.

(Reference Example 6)
According to Reference Example 1, a living machine was produced in which the crimped yarn and the knit yarn were changed. A semi-dull round cross section 84 dtex / 36 filament (fil.) False twisted yarn (one-stage heater) made of polyethylene terephthalate manufactured by Toyobo Co., Ltd. is used for L1, and a semi-dull round cross section of polyethylene terephthalate 33 dtex / 12 fil. No. raw silk (Toyobo Co., Ltd.) was used for L2, and a warp knitting was knitted with a half structure. At this time, the knitting gauge was adjusted to 28 G, the L1 runner was adjusted to 1350 mm, and the L2 runner was adjusted to 1750 mm. The finished machine was 47 / inch course and 28 / inch wale. Next, dyeing was performed in the same manner to obtain an elastic knitted fabric. The details of the knitted fabric and the evaluation results are shown in Table 1.

(Reference Example 7)
A semi-dull round cross section 56dtex / 40 filament (fil.) False twisted yarn (one-stage heater) made of nylon 6 manufactured by Toyobo Co., Ltd. is used as L1, and a semi-dull round cross section 56dtex / 48fil. No. raw silk (manufactured by Toyobo Co., Ltd.) was used for L2, and the warp knitting was knitted with the half structure of FIG. At this time, the knitting gauge was adjusted to 28G, the L1 runner was adjusted to 1280 mm, and the L2 runner was adjusted to 1820 mm. The finished machine was 50 / inch course and 28 / inch wale. Next, the nylon was dyed and an elastic knitted fabric was obtained. Further, this wet machine was pre-wet treated, and then scoured by a conventional method using a liquid dyeing machine (Circular NS) manufactured by Hisaka Seisakusho and dyed with the following dyeing prescription. Thereafter, the temperature was once lowered, and the woven fabric was uniformly exhausted with the polyester elastomer resin by performing a soft cloth treatment while being immersed in the treatment bath of the formulation 1 ′. Thereafter, washing with hot water and washing with water were performed and the product was taken out from the dyeing machine. Thereafter, centrifugal dehydration was performed and final setting was performed at 150 ° C. to obtain a stretch knitted fabric. The details of the knitted fabric and the evaluation results are shown in Table 1.
(1) Scouring Liquid dyeing machine Neugen HC (Daiichi Kogyo Seiyaku) 1 g / l 70 ° C. × 20 minutes (2) Dyeing Liquid dyeing machine 95 ° C. × 90 minutes Ilgaran Black BGL (200%) 7% owf (Color Index number 107 manufactured by Bayer)
CH ₃ COOH 0.5g / l, Bisunoru A-30 1g / l (nylon for leveling agent - made Katasha)
Washing with water, liquid flow 20 ° C x 15 minutes <Prescription 1 '>
Emulsion solution of polyester elastomer resin A 3% owf
Hydrophilic processing agent (SR1800, Takamatsu Yushi Co., Ltd.) 0.5% owf
Treatment temperature 90 ° C, treatment time 30 minutes, bath ratio 1:12
(3) Soaping, liquid flow New soaper RA-200 1 g / l (manufactured by Tokai Oil, soaping agent) 70 ° C. × 20 minutes dehydration 5 minutes

(Comparative Example 1)
Dyeing was performed in the same manner using the same raw machine as in Reference Example 1, but after the reduction cleaning, the polyester resin emulsion was not treated, and after dehydration, the following formulation 2 was performed by a padding method.
<Prescription 2>
Emulsion solution of polyester elastomer resin A 3.8% soln.
Hydrophilic processing agent (SR1800, Takamatsu Yushi Co., Ltd.) 0.6% owf
Padding (squeezing rate = 80%) => Dry 120 ° C => Final set (180 ° C x 30 seconds)

  The details of the knitted fabric and the evaluation results are shown in Table 1. As shown in FIG. 2, the obtained knitted fabric had multifilament single yarns contained in the fabric cohesively adhered to each other.

(Comparative Example 2)
Dyeing was performed in the same manner as in Reference Example 1 using the same raw machine as in Reference Example 1, but after the reduction cleaning, the polyester resin emulsion was not treated, and after dehydration, the padding method was used and only the hydrophilic processing agent of the following formulation 3 was used. did.
<Prescription 3>
Hydrophilic processing agent (SR1800, Takamatsu Yushi Co., Ltd.) 0.4% owf
Padding (squeezing rate = 80%) => Dry 120 ° C => Final set (180 ° C x 30 seconds)
The details of the knitted fabric and the evaluation results are shown in Table 1.

  The stretchable fabric of the present invention not only has excellent stretchability, but also has a soft texture and high dyeing fastness, and therefore can be suitably used for apparel that is used to follow the movement of the body firmly.

Claims (1)

A cloth made of polyethylene terephthalate crimped yarn only, and an elastomer resin compound made of a copolymer of dimethyl terephthalate, ethylene glycol and polytetramethylene glycol having a number average molecular weight of 10,000 to 35,000 is attached to the fiber surface of the cloth. In addition, the single yarns of the fibers contained in the fabric are not adhered and aggregated due to adhesion of the elastomer resin compound, and are kept in a single state, the fabric is formed of a circular knitting, and the length of the crimped yarn is 200. a ~400mm / 100W, that the number of loops is 1,000 to 5,000 pieces / inch ^2, and elongation of the warp direction and the weft direction is 30 to 150% and a stretch-back ratio of 94 to 99%, the hysteresis A stretchable fabric having a loss of 30 to 60%.