Fabric having stretchability and rapid water absorption and drying properties and its uses

Abstract

The present invention relates to a stretchable, moisture-wicking, quick-drying knitted fabric. The stretchable, moisture-wicking, quick-drying knitted fabric has a front layer and a back layer, the back layer containing at least 50% by weight of polyester-based crimpable fiber, and at least one course of the back layer as a complete structure is composed of parts A and B formed by two different knitting operations, with part B formed by a non-knitting operation. The knitted fabric of the present invention has excellent moisture-wicking, quick-drying, and stretch properties and is suitable for producing jackets or knit pants. [Selected Figure] Figure 1

Description

Technical Field

[0001] The present invention relates to a knitted fabric having stretchability and rapid water absorption and drying properties. Specifically, it is suitable for the production of jackets or knitted pants, can keep the human skin in a dry state, and relates to a knitted fabric having stretchability.

Background Art

[0002] With the development of science and technology, new design concepts are constantly applied to the development of apparel fabrics, and sweat treatment has also become an important issue. Humans can lower their body temperature to a comfortable level by sweating. However, in the case of excessive sweating, the clothing becomes completely wet with sweat and adheres to the skin, preventing further sweating and cooling, and causing problems such as stuffiness and compression discomfort. Also, when wearing, humans perform stretching exercises, so the fabric stretches and is likely to generate a sense of restraint, reducing comfort.

[0003] There has been much research into the issue of moisture absorption and sweat discharge in fabrics. For example, Patent Document CN203866490U discloses a knitted fabric with moisture absorption and sweat discharge properties and unidirectional moisture conductance, including a moisture-conducting layer, a diffusion layer, and an evaporation layer. The moisture-conducting layer uses an inlay weave and yarns with a low return rate, such as polyester or polyamide fibers, while the diffusion layer and evaporation layer use ultrafine polyester yarns with a high return rate or strong capillary action. This gives the knitted fabric unidirectional moisture conductance. However, simply using a high return rate and a low return rate or relying on capillary action to transport sweat from the inner layer to the outer layer is limited in its transport capacity, and in the event of heavy sweating, the garment still adheres to the skin, causing discomfort. Furthermore, the material used is a non-crimping yarn, which significantly reduces stretchability and significantly reduces wearing comfort. Japanese Patent Application Publication No. 5371110 also discloses a knitted fabric for clothing. The back surface of the knitted fabric uses two types of yarn, with the raised areas made of hydrophobic synthetic fibers that are water-repellent, and the rest made of hydrophobic synthetic fibers that are not water-repellent. Using this combination of yarns on the back surface of the knitted fabric has somewhat improved the sticky feeling when sweating, but because the raised areas are made of hydrophobic synthetic fibers that are water-repellent, the water absorption performance of the back surface is significantly reduced. At the same time, the ability to diffuse water to the surface is also reduced, and the quick-drying properties of the garment tend to be impaired. Furthermore, because all the materials used are non-crimping yarns, there are still problems with insufficient stretchability and reduced wearing comfort.

[0004] Patent document CN105986358A discloses a moisture-absorbing, quick-drying single-knit fabric that combines moisture absorption and sweat drainage with stretchability. The back surface of the fabric has a concave-convex structure, and the convex portions reduce the contact area with the skin, reducing stickiness during sweating and maintaining a dry feel against the skin. Furthermore, polyester-based crimped fibers can be used for the convex portions to impart a certain degree of stretch to the knitted fabric. This fabric is particularly suitable for the manufacture of summer T-shirts. The dry feel against the skin of the fabric is determined by the height of the convex portions, and the higher the convex portions, the lower the wearing comfort (touch comfort) of the knitted fabric. Therefore, it is difficult to simultaneously achieve both a dry feel against the skin and a comfortable wearing experience. Furthermore, the amount of polyester-based crimped fiber used must be considered, and the stiffness of the knitted fabric needs to be further improved. Therefore, it is very important to develop a knitted fabric that can maintain a dry feeling on the skin surface even in case of heavy sweating and has excellent contact comfort and stretchability.

Summary of the Invention

Problems to be Solved by the Invention

[0005] In order to solve the above problems, an object of the present invention is to provide a knitted fabric that is easy to manufacture, can maintain a dry feeling on the skin surface, and has excellent contact comfort and stretchability, and its uses.

Means for Solving the Problems

[0006] The knitted fabric having stretchability and water-absorbing and quick-drying properties according to the present invention has a surface layer and a back layer. The back layer contains at least 50% by weight of polyester shrinkable fibers. And as one complete weave, at least one course of the back layer consists of part A and part B formed by two different knitting operations, and part B is formed by a non-knitting operation. In the present invention, polyester shrinkable fibers are used as the back layer, and at least one course of one complete weave in the back layer is formed by two different knitting operations, and adjacent loops are shifted in position to form gaps, thereby enhancing the sweat-conducting ability and stretchability of the back layer of the knitted fabric. The knitted fabric of the present invention is particularly suitable for manufacturing jackets, knitted pants, etc., and has excellent wearing comfort.

Brief Description of the Drawings

[0007] [Figure 1] FIG. 1 is a schematic view showing the structure of the double-knitted fabric of the present invention, where part A is formed by knitting and part B is formed by welt knitting.

[0008] [Figure 2] FIG. 2 is a schematic view showing the structure of the single-knitted fabric of the present invention, where part A is formed by tack knitting and part B is formed by welt knitting.

Embodiments for Carrying out the Invention

[0009] To achieve excellent moisture absorption and quick-drying properties, particularly to keep the skin surface dry, the present invention provides a top layer and a back layer. The back layer acts as a moisture-conducting layer to quickly guide sweat to the top layer, while the top layer acts as an evaporation layer to continuously evaporate the sweat absorbed in the top layer.

[0010] In the present invention, the back layer contains at least 50% by weight of polyester-based crimpable fiber. During the dyeing process, the polyester-based crimpable fiber crimps, causing adjacent loops in the back layer to shift positions, forming gaps, reducing the uniformity of the loop arrangement and increasing the number of sweat-conducting channels in the back layer, thereby improving the sweat-conducting ability of the back layer. Meanwhile, the knitted fabric is endowed with excellent stretchability and improved wearing comfort. When the polyester-based crimpable fiber content is less than 50% by weight, the polyester-based crimpable fiber crimps during the post-dyeing treatment process, but the effect of shifting the loop positions is undesirable. That is, the loop arrangement in the back layer is too uniform, resulting in too narrow a sweat-conducting channel and insufficient sweat-conducting ability of the back layer. Therefore, when sweating heavily, the knitted fabric still sticks to the skin, and at the same time, the stretchability of the knitted fabric is significantly reduced, resulting in poor wearing comfort.

[0011] The knitted fabric of the present invention may be knitted on a double knitting machine or may be knitted on a single knitting machine. When knitting on a single knitting machine, by adopting a high gauge to improve the density of the fabric surface layer, a fabric-like effect can be obtained. When knitting on a double knitting machine, for example, by improving the density of the fabric through a tissue design such as a dotted pattern, a fabric-like effect can be obtained. Currently, the knitting operations of the fabric include knitting, tuck knitting, and welt knitting (non-knitting). As one complete pattern of the present invention, at least one course of the back layer consists of part A and part B formed by two different knitting operations, and part B is formed by a non-knitting operation. When the back layer consists entirely of knitting or consists of knitting and tuck knitting, since the loop arrangement of the back layer is too uniform, there are too few sweat-conducting passages, and the dry feeling of the back layer cannot be maintained. In the present invention, the greater the number of passages formed by two different knitting operations, the smaller the uniformity of the loop arrangement of the back layer of the fabric, the more sweat-conducting passages, which is advantageous for the sweat conductivity of the fabric. Therefore, as the number of such knitting operations, 1 to 72 courses are preferable, and 3 to 18 courses are more preferable.

[0012] In the present invention, as the knitting operation of part A and the knitting operation of part B, the arrangement ratio between the two has a great influence on the sweat conductivity and stretchability of the fabric. The greater the ratio of the knitting operation of part B, the smaller the uniformity of the loop arrangement of the back layer, and the better the sweat conductivity and stretchability of the fabric. However, when the arrangement ratio of part A and part B exceeds 1:5, the loop arrangement of the back layer is relatively loose, the stretchability of the fabric increases, but the stretch recovery rate also tends to decrease, which may affect the dimensional stability and texture of the fabric. Therefore, the ratio between the two is preferably 1:1 to 1:5.

[0013] As the polyester shrinkable fiber used in the present invention, preferably, it is a shrinkable fiber with a shrinkage recovery rate (CR value) of 30% or more. The polyester shrinkable fiber with a CR value within this range has good crimpability. After the fabric formed thereby is dyed, the loop arrangement degree of the back layer is appropriate, ensuring not only excellent sweat conductivity and stretchability of the fabric, but also stretch recovery rate and body feeling. As the polyester shrinkable fiber used in the present invention, more preferably, it is a shrinkable fiber with a CR value of 40% - 60%.

[0014] The type of the polyester shrinkable fiber used in the present invention is not particularly limited, and it may be a single-component shrinkable fiber, a two-component side-by-side type shrinkable fiber, or a highly shrinkable false-twisted yarn, etc. Preferably, it is polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT), polybutylene terephthalate / polyethylene terephthalate (PBT / PET), polytrimethylene terephthalate / polyethylene terephthalate (PTT / PET), high-viscosity PET / low-viscosity PET. Its form is not particularly limited, and it may be a fully drawn yarn FDY or a false-twisted yarn DTY. The fineness of the polyester shrinkable fiber is not particularly limited, and considering the lightness of the fabric, it is preferably 30 - 200 denier (abbreviated as D).

[0015] Considering the stretchability of the fabric, it is preferable to use only polyester shrinkable fiber in the back layer. More preferably, polyester shrinkable fiber is used for both the surface layer and the back layer, that is, the content of polyester shrinkable fiber in the fabric is 100% by weight. Also, the types of polyester shrinkable fibers used for the surface layer and the back layer may be the same or different, and are not particularly limited. The interwoven yarn may be a natural fiber or a synthetic fiber. Considering the water absorption and quick-drying property of the fabric, synthetic fiber is preferable.

[0016] According to JIS L1096:2010, the knitted fabric of the present invention preferably has a transverse elongation rate of 20% to 150% and a transverse elongation recovery rate after 30 seconds of 70% or more, and more preferably has a transverse elongation rate of 80% to 120% and a transverse elongation recovery rate after 30 seconds of 80% to 95%.

[0017] In the present invention, the lower the moisture retention rate of the back layer, the drier the knitted fabric will feel. Even if a large amount of sweat is generated, the sweat is quickly absorbed and transferred to the surface, and the surface in contact with the skin can maintain a dry feeling for a long time, without affecting comfort when worn for a long period of time. The moisture absorption speed is preferably 3 seconds or less. The front / back diffusion area ratio is preferably 3.0 or more, more preferably 3.0 to 10.0. The moisture retention rate of the back layer is preferably 20.0% or less, more preferably 5.0% or less.

[0018] The knitted fabric of the present invention has a basis weight of 100 to 400 g / m 2 It is more preferable that the density is 150 to 300 g / m 2 When the density of a knitted fabric in the weft or warp direction is less than 30 courses / inch, the stiffness of the knitted fabric tends to decrease. When the density of a knitted fabric in the weft or warp direction is more than 80 courses / inch, the density of the knitted fabric tends to increase and the crimpability tends to decrease. Therefore, it is preferable that the density of a knitted fabric in both the weft and warp directions is 30 to 80 courses / inch. The knitted fabric of the present invention is suitable for producing jackets, knit pants, and the like.

[0019] In the present invention, the properties were evaluated by the following methods. (1) Elongation rate Measurements are based on JISL1096:2010 standards. (2) Elongation recovery rate Measurements are based on JISL1096:2010 standards.

[0020] (3) Water absorption rate (dropping method) Take three samples of approximately 15cm x 15cm, fix the samples face down in a 10cm diameter frame so that there is no extra tension, fix them in a jig so that the surface of the sample is horizontal, fix the tip of the burette so that it is 5cm away from the surface of the horizontally placed sample, read the time from when the water droplets are dropped until the special reflection disappears even when the water droplets drip onto the sample (read to 0.1 seconds), measure the water absorption time at any three points on the three samples using the same method, and calculate the average value of a total of nine data points.

[0021] (4) Front and back diffusion area ratio Three 10cm x 10cm samples were taken and conditioned for 4 hours in an environment with a temperature of 20°C and humidity of 65%. 1mL of ink was absorbed with a pipette and dropped onto a glass plate. The back side of the sample was covered with ink so that it faced downwards. After 3 minutes, the area of the ink spread on the surface was measured with an area measuring device (S 表 ) and the diffusion area in the back layer (S 裏 ) is measured (displayed to three decimal places). Then, calculate the front and back diffusion area ratio based on the following formula (displayed to one decimal place): Front and back diffusion area ratio = S 表 / S 裏 The front and back diffusion area ratios of the three samples are measured consecutively, and the average value is calculated.

[0022] (5) Water retention rate of the lining layer [1] Take three 10cm x 10cm samples, six filter papers of the same size, and one organic glass of the same size. Measure the weight of the organic glass (W0) and the weight of the sample (W1) in an environment of 20°C and 65% humidity (display to three decimal places); [2] Place 2 cc of distilled water on the organic glass using a syringe, quickly place the sample on the water drop, and after leaving it for 1 minute, measure the weight (W2) of the sample that has absorbed the distilled water (display to three decimal places); [3] After the above measurement, measure the weight (W3) of the organic glass and the remaining distilled water (display to three decimal places); [4] Measure the weight of the two filter papers (w1, w3) before absorbing water (display to three decimal places); [5] After absorbing water, the sample is sandwiched between two pieces of filter paper, a 500g weight is placed on top, and after leaving it for 1 minute, the weights of the top and bottom filter papers (w2, w4) are measured (displayed to three decimal places); [6] Calculate the moisture retention rate on both sides using the following formula (display to one decimal place): Water retention rate of the lining layer (%) = (w4-w3) / (W2-W1) x 100 W1: weight of sample before water absorption (g) W2: Weight of sample after absorbing water (g) W3: Weight of the organic glass and residual distilled water after water absorption (g) w1: Weight of the surface filter paper before water absorption (g) w2: Weight of the surface filter paper after water absorption (g) w3: Weight of back filter paper before water absorption (g) w4: Weight of the back filter paper after absorbing water (g).

[0023] (6) Elasticity recovery rate (CR value) a. First, the sample is conditioned under standard atmospheric pressure for 12 hours. b. Using a skein length measuring device, tie the beginning and end of a sample with a skein length of 10 m (10 turns * 1 m / turn), tie a marking color thread to the skein to mark it, and hang it on a frame. c. Leave the sample at standard atmospheric pressure for at least 12 hours to equilibrate before heat treatment. d. Add a predetermined amount of soft water to the thermostatic water bath to ensure that the sample is completely immersed and does not touch the wall of the water bath. Set the temperature of the water bath to 90°C. Fold the sample in half, then in half again, and place it in a mesh bag in a relaxed state. Then, place the mesh bag containing the sample in hot water and stir it evenly with a glass rod. After 20 minutes, carefully remove the mesh bag with a clip and place it on a tray. After cooling, hang the mesh bag in a tensionless state and allow it to equilibrate under standard atmospheric pressure after heat treatment. e. Calculation of initial and constant load: Initial load (G): 0.002g / denier x thread size x 2 x number of turns Constant load (G): 0.1g / denier x thread size x 2 x number of turns The unit of yarn fineness is denier, f. One day before the test, put soft water into a large-capacity measuring cylinder and adjust the temperature to 20°C for 12 hours under standard atmospheric pressure. g. Hang the sample on the hook, and apply an initial load and a constant load sequentially to the other end of the marking color thread. While adjusting the tension, place it in soft water in a large-capacity measuring cylinder. At the same time, record the time with a stopwatch. After leaving it for 2 minutes, use a staff to read the length L of the sample to the nearest 1 mm. Remove the constant load from the hook. After leaving it for 2 minutes, with the initial load still applied, use a staff to read the length L1 of the sample to the nearest 1 mm. Based on the following formula: Elasticity recovery rate (i.e., the CR value of the thread) is calculated.

[0024]

number

[0025] In the formula:CR: Elasticity recovery rate , % L: sample length when the initial load and constant load were applied simultaneously, mm; L1: Sample length when the constant load is removed and the initial load is applied, mm.

[0026] The present invention will be further explained below with reference to examples and comparative examples. The yarns in the examples and comparative examples were manufactured by Toray Synthetic Fibers (Nantong) Co., Ltd. [Example]

[0027] Example 1 Using a 28G double knitting machine, four courses are set as one complete weave pattern. For the first and third courses, the surface layer is formed entirely by knitting using 75D - 72f - regular PET DTY. For the second and fourth courses, the back layer is formed by dialing using 60D - 24f - PBT DTY (CR value is 35%) and 60D - 36f - regular PET DTY respectively, thereby obtaining a raw fabric. Among them, the second course is knitted and welt - knitted using 60D - 24f - PBT DTY, and the ratio of knitting to welt - knitting is 1:1. The fourth course is knitted entirely using 60D - 36f - regular PET DTY. The obtained raw fabric is subjected to pretreatment (scouring agent 1 g / L, temperature 95°C), dyeing (disperse dye, 130°C * 30 min), and finishing (hydrophilic resin 10 g / L, neutralizing acid 1 g / L) to obtain the fabric of the present invention. The number of loops in the warp and weft directions of the obtained fabric is 42 * 53 pieces / inch, and the areal density is 232 g / m 2 as follows. Specifically, it is shown as in Table 1.

[0028] Example 2 Using a 36G single knitting machine, four courses are set as one complete weave pattern. For the first and third courses, the surface layer is formed entirely by knitting using 75D - 72f - regular PET DTY. For the second and fourth courses, the back layer is formed using 60D - 24f - PBT DTY (CR value is 35%) and 60D - 36f - regular PET DTY respectively, thereby obtaining a raw fabric. Among them, the second course is knitted and welt - knitted using 60D - 24f - PBT DTY, and the ratio of knitting to welt - knitting is 1:1. The fourth course is knitted entirely using 60D - 36f - regular PET DTY. Other conditions are the same as those in Example 1 to obtain the fabric of the present invention. The number of loops in the warp and weft directions of the obtained fabric is 44 * 59 pieces / inch, and the areal density is 167 g / m 2 as follows. Specifically, it is shown as in Table 1.

[0029] Example 3 Ten courses were knitted on a 28G double knitting machine, forming one complete structure. Odd-numbered courses were knitted entirely with 75D-72f-regular PET DTY using a cylinder knitting machine to form the surface layer. Even-numbered courses were knitted entirely with 60D-24f-PTT DTY (CR value 35%) and 60D-36f-regular PET DTY using a dial knitting machine to form the back layer, respectively, to obtain a greige fabric. The second, sixth, and tenth courses were knitted entirely with 60D-24f-PTT DTY using a knitting and welt knitting method, with a knitting and welt knitting ratio of 1:1. The third and eighth courses were knitted entirely with 60D-36f-regular PET DTY using a knitting method. The other conditions were the same as in Example 1, and a knitted fabric of the present invention was obtained. The resulting knitted fabric had a warp and weft loop count of 41*49 / inch and a basis weight of 213 g / m. 2 Specifically, it is shown in Table 1.

[0030] Example 4 Ten courses were knitted on a 36G single knitting machine, forming one complete structure. Odd-numbered courses were knitted entirely with 75D-72f-regular PET DTY to form the surface layer, and even-numbered courses were knitted entirely with 60D-24f-PTT DTY (CR value 35%) and 60D-36f-regular PET DTY to form the back layer, resulting in a greige fabric. The second, sixth, and tenth courses were knitted entirely with 60D-24f-PTT DTY using tuck and welt knitting, with a tuck to welt ratio of 1:1. The fourth and eighth courses were knitted entirely with 60D-36f-regular PET DTY using knitting. The other conditions were the same as in Example 1, and a knitted fabric of the present invention was obtained. The resulting knitted fabric had a warp and weft loop count of 42*56 / inch and a basis weight of 154g / m. 2 Specifically, it is shown in Table 1.

[0031] Example 5 Using a 28G double knitting machine, one complete pattern is set with 36 courses. As odd courses, all are knitted on the cylinder using 75D - 36f - PBT / PET DTY (CR value is 41%) to form the surface layer. As even courses, the back layer is formed by knitting and welt knitting using 40D - 24f - PBT DTY (CR value is 39%), thereby obtaining a lively texture. The ratio of knitting and welt knitting in the even courses is 1:5, and other conditions are the same as in Example 1, obtaining the knitted fabric of the present invention. The number of loops in the warp and weft directions of the obtained knitted fabric is 38 * 47 pieces / inch, and the areal density is 194 g / m 2 It is as follows. Specifically, it is shown as in Table 1.

[0032] Example 6 Using a 36G single knitting machine, one complete pattern is set with 36 courses. As odd courses, all are knitted to form the surface layer using 50D - 36f - PBT / PET DTY (CR value is 49%). As even courses, the back layer is formed by tuck knitting and welt knitting using 40D - 24f - PBT DTY (CR value is 39%). The ratio of tuck knitting and welt knitting in the even courses is 1:5, and other conditions are the same as in Example 1, obtaining the knitted fabric of the present invention. The number of loops in the warp and weft directions of the obtained knitted fabric is 39 * 54 pieces / inch, and the areal density is 142 g / m 2 It is as follows. Specifically, it is shown as in Table 1.

[0033] Example 7 Using a 36G single knitting machine, 12 courses are taken as one complete stitch pattern. For the odd courses, the surface layer is formed entirely by knitting using 75D - 72f - regular PET DTY. For the even courses, the back layer is formed using 60D - 24f - PBT DTY (CR value is 35%) and 60D - 36f - regular PET DTY. The 2nd, 6th, and 10th courses are knitted in tuck stitch and welt stitch using 60D - 24f - PBT DTY, and the ratio of tuck stitch to welt stitch is 1:8. The 4th, 8th, and 12th courses are knitted entirely by knitting using 60D - 36f - regular PET DTY. Other conditions are the same as in Example 1, and the knitted fabric of the present invention is obtained. The number of loops in the warp and weft directions of the obtained knitted fabric is 36 * 50 pieces / inch, and the basis weight is 131 g / m 2 It is. Specifically, it is shown as in Table 1.

[0034] Example 8 Using a 28G double knitting machine, 36 courses are taken as one complete stitch pattern. For the odd courses, the surface layer is formed entirely by knitting in the cylinder using 75D - 72f - regular PET DTY. For the even courses, using 40D - 24f - PBT DTY (CR value is 39%) and 60D - 36f - regular PET DTY, a 1*1 knitting method is used on the dial to obtain a live fabric. Among them, PBT / PET is knitted in knit stitch and welt stitch, and the ratio of knit stitch to welt stitch is 1:5. Other conditions are the same as in Example 1, and the knitted fabric of the present invention is obtained. The number of loops in the warp and weft directions of the obtained knitted fabric is 37 * 45 pieces / inch, and the basis weight is 183 g / m 2 It is. Specifically, it is shown as in Table 1.

[0035] Example 9 As the 2nd course, it is knitted in knit stitch and welt stitch using 60D - 24f - PBT DTY with a CR value of 41%, and the ratio of knit stitch to welt stitch is 1:1. Other conditions are the same as in Example 1, and the knitted fabric of the present invention is obtained. The number of loops in the warp and weft directions of the obtained knitted fabric is 42 * 54 pieces / inch, and the basis weight is 234 g / m 2 It is. Specifically, it is shown as in Table 1.

[0036] Example 10 As the second course, it was knitted using 60D-24f-high shrinkage PET DTY with a CR value of 25%, and other conditions were the same as in Example 9, and a knitted fabric of the present invention was obtained. The number of loops in the warp and weft directions of the obtained knitted fabric was 41*52 pieces / inch, and the areal density was 214 g / m 2 It is as follows. Specifically, it is shown as in Table 1.

[0037] Example 11 As the second course, it was knitted using 60D-24f-high shrinkage PET DTY with a CR value of 35%, and other conditions were the same as in Example 9, and a knitted fabric of the present invention was obtained. The number of loops in the warp and weft directions of the obtained knitted fabric was 41*54 pieces / inch, and the areal density was 231 g / m 2 It is as follows. Specifically, it is shown as in Table 1. Jackets or knitted pants are manufactured from the knitted fabrics of Examples 1-11.

[0038] Comparative Example 1 Using a 28G double knitting machine, 6 courses are taken as one complete pattern. As the odd courses, the entire surface layer is formed by knitting all with 75D-72f-regular PET DTY on the cylinder, and as the even courses, the back layer is formed by dialing using 100D-48f-PBT DTY (CR value of 35%) and 60D-36f-regular PET DTY. Among them, as the second course, it is knitted by knitting and welting with 100D-48f-PBT DTY, and the ratio of knitting and welting is 1:1. As the fourth and sixth courses, they are knitted entirely with 60D-36f-regular PET DTY, and other conditions are the same as in Example 1, and a knitted fabric of the present invention was obtained. The number of loops in the warp and weft directions of the obtained knitted fabric was 40*51 pieces / inch, and the areal density was 225 g / m 2 It is as follows. Specifically, it is shown as in Table 1.

[0039] Comparative Example 2 Using a 36G single knitting machine, 8 courses are made into one complete stitch pattern. As odd courses, all are knitted using 75D - 72f - regular PET DTY to form the surface layer, and as even courses, 150D - 72f - PBT DTY (CR value is 35%) and 60D - 36f - regular PET DTY are used to form the inner layer. Among them, as the 2nd course, it is knitted with 150D - 72f - PBT DTY using tuck knitting and welt knitting, and the ratio of tuck knitting to welt knitting is 1:1. As the 4th, 6th, and 8th courses, all are knitted using 60D - 36f - regular PET DTY. Other conditions are the same as in Example 1, and the fabric of the present invention is obtained. The number of loops in the warp and weft directions of the obtained fabric is 42*57 pieces / inch, and the areal density is 158 g / m 2 It is as follows. Specifically, it is shown as in Table 1.

[0040] Comparative Example 3 Using a 28G double knitting machine, 10 courses are made into one complete stitch pattern. As odd courses, all are knitted using 75D - 72f - regular PET DTY on the cylinder to form the surface layer, and as even courses, 60D - 24f - PTT DTY (CR value is 35%) and 60D - 36f - regular PET DTY are used on the dial to form the inner layer. Among them, as the 2nd, 6th, and 10th courses, 60D - 24f - PTT DTY (CR value is 35%) is used, and as the 4th and 8th courses, 60D - 36f - regular PET DTY is used. Other conditions are the same as in Example 1, and the fabric of the present invention is obtained. The number of loops in the warp and weft directions of the obtained fabric is 44*58 pieces / inch, and the areal density is 269 g / m 2 It is as follows. Specifically, it is shown as in Table 1.

[0041] Comparative Example 4 Eight courses were knitted as one complete structure on a 36G single knitting machine. The odd-numbered courses were knitted entirely using 75D-72f-regular PET DTY to form the surface layer, and the even-numbered courses were knitted entirely using 60D-36f-regular PET DTY to form the back layer. The second course was knitted using tuck knitting and welt knitting, with a tuck knitting to welt knitting ratio of 1:1, and the fourth, sixth and eighth courses were knitted entirely using knit knitting, with the other conditions being the same as in Example 1, to obtain a knitted fabric of the present invention. The number of loops in the warp and weft directions of the obtained knitted fabric was 42*55 / inch, and the basis weight was 145g / m 2 Specifically, it is shown in Table 1.

[0042] [Table 1]

[0043] According to the table above, (1) Looking at Examples 1 and 3, and Examples 2 and 4, under the same conditions, a knitted fabric with a 50% polyester crimpable fiber content in the back layer has the same water absorbency as a knitted fabric with a 60% polyester crimpable fiber content in the back layer, but the quick-drying property of the former (smaller front / back diffusion area ratio and higher back layer water retention) is slightly worse than that of the latter. The former has a smaller elongation rate than the latter, but a higher elongation recovery rate.

[0044] (2) From Example 7 and Example 4, under the same conditions, the knitted fabric with a 1:8 ratio of A part to B part in the back layer has the same water absorbency as the knitted fabric with a 1:1 ratio of A part to B part, and the former has better quick-drying properties (smaller front / back diffusion area ratio and higher back layer water retention) and elongation rate than the latter. However, the elongation recovery rate is lower than the latter, which affects dimensional stability, etc.

[0045] (3) From Examples 5 and 8, under the same conditions, for the knitted fabric with the surface layer being PBT / PET and the back layer being PBT, compared with the knitted fabric with the surface layer being regular PET and the back layer being regular PET and PBT, the water absorbency of both is the same, and the quick-drying property (the surface-back diffusion area ratio is large and the water retention rate of the back layer is small) and elongation rate of the former are both superior to those of the latter.

[0046] (4) From Examples 11 and 10, under the same conditions, for the knitted fabric using high-shrinkage PET with a CR value of 35% as the back layer, compared with the knitted fabric using high-shrinkage PET with a CR value of 25% as the back layer, the water absorbency of both is the same, and the quick-drying property (the surface-back diffusion area ratio is large and the water retention rate of the back layer is small) and elongation rate of the former are superior to those of the latter.

[0047] (5) From Comparative Example 1 and Example 1, under the same conditions, for the knitted fabric with a PBT fiber content of 33% in the back layer, compared with the knitted fabric with a PBT fiber content of 50% in the back layer, the water absorbency, quick-drying property (the surface-back diffusion area ratio is small and the water retention rate of the back layer is large), and elongation rate of the former are all much worse than those of the latter.

[0048] (6) From Comparative Example 2 and Example 2, under the same conditions, for the knitted fabric with a PBT fiber content of 28% in the back layer, compared with the knitted fabric with a PBT fiber content of 50% in the back layer, the quick-drying property (the surface-back diffusion area ratio is small and the water retention rate of the back layer is large) and elongation rate of the former are all much worse than those of the latter.

[0049] (7) From Comparative Example 3 and Example 1, under the same conditions, for the knitted fabric with the entire back layer being knitted, compared with the knitted fabric with the back layer being knitted + nonwoven fabric, the water absorbency, quick-drying property (the surface-back diffusion area ratio is small and the water retention rate of the back layer is large), and elongation rate of the former are all much worse than those of the latter.

[0050] (8) Judging from Comparative Example 4 and Example 2, and Comparative Example 4 and Example 4, under the same conditions, the knitted fabric in which both the surface and back layers are regular PET has the same water absorbency as the knitted fabric in which the surface layer is regular PET and the back layer is regular PET and polyester-based crimpable fiber, but the quick-drying property (the surface-to-back diffusion area ratio is small and the back layer water retention rate is high) and the elongation rate of the former are both far worse than the latter.

Claims

1. A stretchable and water-absorbing and quick-drying fabric having a surface layer and a back layer, wherein the back layer contains at least 50% by weight of a polyester shrinkable fiber, and as one complete weave, at least one course of the back layer is composed of part A and part B formed by two different knitting operations, the part B is formed by a non-knitting operation, the polyester shrinkable fiber has a stretch recovery rate of 30% or more, and the polyester shrinkable fiber is polybutylene terephthalate, polytrimethylene terephthalate or polybutylene terephthalate / polyethylene terephthalate.

2. The stretchable and water-absorbing and quick-drying fabric according to Claim 1, wherein the ratio of part A to part B in the same course in the back layer of the fabric is 1:1 to 1:

5.

3. The stretchable and water-absorbing and quick-drying fabric according to Claim 1, wherein the yarns constituting the surface layer and the back layer of the fabric are both polyester shrinkable fibers.

4. According to JIS L1096:2010, the fabric has an elongation rate in the transverse direction of 20% to 150%, an elongation recovery rate in the transverse direction after 30 seconds of 70% or more, a water absorption speed of 3 seconds or less, a surface-back diffusion area ratio of 3.0 or more, and a water retention rate of the back layer of 20% or less. The stretchable and water-absorbing and quick-drying fabric according to any one of Claims 1 to 3.

5. The knitted fabric has a basis weight of 100 to 400 g / m 2 and the density in both the width direction and the length direction is 30 to 80 loops per inch, and the stretchable and water-absorbing and quick-drying knitted fabric according to any one of claims 1 to 3, characterized in that.

6. A jacket or knitted pants produced by using the stretchable and water-absorbing and quick-drying fabric according to Claim 1.

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