Composite yarn and textile made of composite yarn

Abstract

The present invention addresses the problem of: providing a textile having excellent contact cooling sensitivity, UV protection, water absorption / quick-drying properties, and heat protection; and providing a composite yarn for forming such a textile. In providing said textile and composite yarn, the present invention addresses the problem of: providing a textile that is not significantly different in appearance and texture from a 100% cotton textile, and that exhibits performance at least as good as that of a 100% cotton textile in terms of contact cooling sensitivity, UV protection, water absorption / quick-drying properties, and heat protection; and providing a textile having contact cooling sensitivity, UV protection, water absorption / quick-drying properties, and heat protection that exceed similar parameters of textiles comprising other chemical fibers. The aforesaid problem is solved by a composite yarn comprising a center yarn made of a modified-cross-section yarn and air-textured yarn (ATY yarn) wound around the center yarn, and a textile comprising said composite yarn.

Description

Composite yarn and fabric made from composite yarn

[0001] The present invention relates to a woven or knitted fabric having high moisture absorption, quick drying and high UV protection properties, and to a composite yarn for producing such a fabric.

[0002] Conventionally, high moisture absorption and quick-drying properties or high UV blocking properties have often been required for fabrics and products made using fabrics. In addition, some products made using fabrics, such as clothing, place importance on design, and there has been a demand for high moisture absorption and quick-drying properties and a high UV blocking rate while maintaining the conventional appearance and texture.

[0003] For this reason, fabrics have been made using composite yarns made from FDY yarn and DTY yarn, but no fabrics have yet been provided that fully meet user expectations in terms of cool-to-the-touch feel, UV protection, moisture absorption and quick-drying properties, and heat protection.

[0004] The present invention aims to provide a fabric with high cooling sensation to the touch, UV protection, moisture absorption and quick-drying properties, and heat protection, and to provide a composite yarn for forming such a fabric. In providing the fabric and composite yarn, the objective is to provide a fabric that is not significantly different in appearance and texture from 100% cotton fabric, and that has performance comparable to or superior to 100% cotton fabric in terms of cooling sensation to the touch, UV protection, moisture absorption and quick-drying properties, and heat protection, and to provide a fabric that has cooling sensation to the touch, UV protection, moisture absorption and quick-drying properties, and heat protection properties that exceed those of fabrics made of other chemical fibers.

[0005] The problem is solved by a composite yarn made of a central yarn made of a modified cross-section yarn and an ATY (Air Textured Yarn) yarn wound around the central yarn, and a fabric made of the composite yarn.

[0006] The modified cross-section yarn constituting the central yarn can be a cross-section yarn.

[0007] The central thread can contain ceramic or jade, or it can contain both ceramic and jade.

[0008] In a further advantageous embodiment, a composite yarn consisting of a central yarn made of a modified cross-section yarn and an ATY yarn (Air Textured Yarn) wound around the central yarn can be used on only one side or both sides of the fabric.

[0009] Fig. 1 is a cross-sectional view of a composite yarn according to an embodiment of the present invention. Fig. 2 is a table showing various test data for Example 1 of the present invention and a comparative example. Fig. 3 is a table showing data on diffusible residual moisture regain in the test data of Fig. 2 (Example 1). Fig. 4 is a graph showing data on diffusible residual moisture regain in the test data of Fig. 2 (Example 1). Fig. 5 is a table showing data on diffusible residual moisture regain in the test data of Fig. 2 (Comparative Example). Fig. 6 is a graph showing data on diffusible residual moisture regain in the test data of Fig. 2 (Comparative Example).

[0010] The best mode for carrying out the present invention will be described in detail below with reference to examples.

[0011] Fig. 1 is a cross-sectional view of a composite yarn constituting a fabric according to one embodiment of the present invention. As can be seen in Fig. 1, the composite yarn according to the present invention can be configured as a composite yarn having a plurality of modified cross-section yarns as a central yarn and ATY yarns surrounding the central yarn. As can be seen in Fig. 1, the modified cross-section yarns constituting the central yarn can be cross-section yarns. In this embodiment, the fabric is formed as a woven fabric, but it can also be formed as a cut-and-sew fabric (knitted fabric, jersey plating knit, etc.).

[0012] This composite yarn is formed in two steps. In the first step, a central yarn is formed. In the composite yarn of the present invention, the central yarn is a modified cross-section yarn, more preferably a cross-section yarn. It is advantageous to form the modified cross-section yarn or cross-section yarn containing ceramic or jade.

[0013] After the modified cross-section yarn or cross-section yarn is formed, in the second step, an ATY yarn is wound around the modified cross-section yarn as a cover yarn in a covering process. The ATY yarn is formed by air jet technology, so it forms irregularly twisted loops. By winding such an ATY yarn around the modified cross-section yarn, it is possible to form a larger volume of air layer (or air gap) in the composite yarn than in the conventional method. As a result, the surface gloss of the fabric formed from the composite yarn can be reduced.

[0014] When fabrics according to the present invention are made from such composite yarns, it is possible to use the composite yarns on one or both sides of the fabric. The fabrics can be made as woven or knitted fabrics. When the fabric is woven, it is possible to determine whether the composite yarns are used on one or both sides of the fabric by using the composite yarns as the warp or weft, or both the warp and weft. When the fabric is knitted, it is possible to determine whether the composite yarns are used on the front or back of the fabric by selecting whether the composite yarns are used on the plating side or the warp.

[0015] Figure 2 is a table summarizing the results of a comparison test between a fabric using the composite yarn (Example 1) and a fabric according to a comparative example. The comparison test concerned UV blocking function, moisture absorption and quick-drying function, etc. As can be seen in Figure 2, the comparison tests included a UV blocking rate test, UPF test (JIS 1925, AS4399:2020, EN13758:2001), UVA transmittance test (EN13758-1:2001), UV test (GB / T18830-2009), moisture absorption and quick-drying test (water absorption test, diffusible moisture regain test according to ISO 17617), heat blocking rate test (JIS 1951), and contact cool / warm sensation test. The test methods and test results for each test are described in detail below.

[0016] [Test Method] The ultraviolet shielding rate test was conducted on the original fabric and the washed sample of each of the Comparative Example and Example 1. The washing treatment was performed 10 times by hanging to dry according to the JIS L 1930 C4G method. The ultraviolet shielding rate test was conducted in accordance with JIS L 1925. Using a spectrophotometer, the transmittance of ultraviolet light with a wavelength of 290 to 400 nm was measured, and the ultraviolet shielding rate was calculated using the following formula: UV shielding rate (%) = 100 - average transmittance of ultraviolet light (%). Note that an ultraviolet shielding rate calculated using this formula of 90% or higher is often evaluated as having good ultraviolet shielding properties.

[0017] The first column of the UPF test results shows the test results (ultraviolet protection factor, Japanese standard) according to the JIS L 1925 UV Protection Evaluation Method. The second and third columns of the UPF test show the measurement results of the UV Protection Factor (AS4399:2020, Australian standard) and the UV Protection Factor (EN13758:2001, European standard). These factors indicate the ability to prevent sunburn. The ability to protect against sunburn is expressed as Minimum (= rating 15), Good (= rating 30), and Excellent (= rating 50 or 50+).

[0018] The UVA transmittance test was carried out in accordance with the European testing standard EN13758-1:2001.

[0019] The UV test was conducted to test the UV transmittance in accordance with the Chinese inspection standard GB / T18830-2009.

[0020] The water absorption and quick-drying tests were conducted in accordance with ISO 17617, including a water absorption test (column 1) and a diffusible residual moisture content test (column 2). The test involved dropping 0.3 ml of water onto the center of the fabric, and the weight of the test piece was automatically measured at 5-minute intervals as the moisture diffused and dried. The results were calculated using the following formula: Diffusible residual moisture content (%) = Water weight (g) at any given time / Water weight (g) at the start of measurement x 100. Note that test results are often evaluated as good when the diffusible residual moisture content is 30% or less after 60 minutes.

[0021] The heat shielding rate test was conducted in accordance with the heat shielding test method JIS L 1951. This test evaluates the ability of a fabric to block radiant heat generated from sources such as artificial sunlight, thereby suppressing temperature rise. The test was conducted as follows: A heat receiver was placed on the back of the sample without contact, and the heat from sunlight (radiant heat) that passed through the sample was absorbed by the heat receiver. 30 minutes after irradiation, the temperature rise of the heat receiver with the sample attached and the bare heat receiver (blank) was measured, and the heat shielding rate was calculated using the following formula. An artificial sunlight light source was used as the light source. Heat shielding rate S = [(ΔTb - ΔTs) / ΔTb] x 100 ΔTb: Average temperature rise of the sample (°C) ΔTs: Average temperature rise of the blank (°C)

[0022] In terms of heat shielding rate classification symbols, S25 corresponds to a heat shielding rate of 25% or more but less than 35%, S35 corresponds to a heat shielding rate of 35% or more but less than 45%, and S45 corresponds to a heat shielding rate of 45% or more but less than 55%. S35 or more is often evaluated as having both good and bad heat shielding properties.

[0023] The test for cold and warm contact sensation was conducted in accordance with JIS L 1927, a method for evaluating cold and warm contact sensation. This test is conducted to evaluate the function of feeling cool when touched by a person. The test was conducted as follows: 1. The room temperature and the sample (measurement table) were set to the same temperature. 2. A measurement part heated to room temperature +10°C (ΔT = 10°C) was brought into contact with the sample. 3. The temperature of the heat source plate at the beginning of contact was measured, and the heat flux was calculated. The maximum value of the heat flux (W / cm ２ ) is defined as Q-MAX. A Q-MAX of 0.100 or more is often evaluated as having a good cool sensation to the touch.

[0024] [Example 1 and Comparative Example] The fabric of Example 1 uses a cross-section yarn as the modified cross-section yarn, which serves as the central yarn, and an ATY yarn is wound around it to form a composite yarn. The central yarn contains ceramic and jadeite. This allows an air layer to form within the yarn, thereby enhancing the cool-to-the-touch, heat-shielding, UV transmittance, and UV blocking rate functions. In Example 1, the fabric is formed as a woven fabric. It is a fabric for bottoms. Of course, the composite yarn and fabric of the present invention can also be used for textile products other than bottoms (such as caps and outerwear). In this example, the composite yarn is used as the weft of the woven fabric, resulting in the composite yarn being used on the back side of the fabric. The fabric of the comparative example is a regular 100% C fabric that does not use a modified cross-section or cross-section central yarn or an ATY yarn.

[0025] [Test Data] The results (test data) of the above test performed on Example 1 and the comparative example are shown in FIG.

[0026] As a result of testing according to the UV shielding evaluation method JIS L 1925, the Comparative Example showed a shielding rate of 85.7% for the original fabric and 94.9% after washing, whereas Example 1 showed an improved shielding rate of 93.2% for the original fabric and 96.5% after washing. In comparing the original fabric and the washed fabric, both the Comparative Example and Example 1 showed a higher shielding rate after washing. Example 1 not only showed a significant improvement in the UV shielding rate for the original fabric (93.2%) compared to the original fabric of the Comparative Example (85.7%), but also achieved a shielding rate approaching that of the Comparative Example after washing (94.9%), resulting in very favorable results.

[0027] Regarding UPF test results, the UV protection factors showed similar trends in the JIS L 1925, AS4399:2020, and EN13758:2001 standards. The Comparative Example showed a low rating of UPF 10 for the raw fabric and UPF 17 or UPF 18 after washing, whereas Example 1 showed a value close to UPF 50 for the raw fabric and achieved an excellent result of UPF 50+ after washing. The UVA transmittance was 15.46% for the Comparative Example and 7.95% for the Example (raw fabric). After washing, the UVA transmittance was 5.01% for the Comparative Example and 4.06% for the Example. According to the Chinese testing standard GB / T18830-2009, the UVB transmittance was 7.68% for the Comparative Example and 1.17% for Example 1.

[0028] Regarding water absorption and quick-drying properties, the water absorption time for the Comparative Example was 54 seconds for the original fabric and 53 seconds for the fabric after washing, whereas the water absorption time for Example 1 was 2 seconds for the original fabric and less than 1 second for the fabric after washing. The diffusible residual moisture content for the Comparative Example was 57% for the original fabric and 55.5% for the fabric after washing, whereas the water absorption time for Example 1 was 17.3% for the original fabric and 13.1% for the fabric after washing, showing favorable results. Detailed test results for the diffusible residual moisture content are shown in tables and graphs in Figures 3 to 6, respectively.

[0029] As a result of the test according to the heat shielding property test method JIS 1951, the heat shielding rate was 49% for the comparative example and 50% for Example 1. In both cases, the heat shielding rate classification symbol was S45, and the heat shielding property was good.

[0030] As a result of the test according to JIS L 1927, the maximum heat absorption rate was 0.092 for the comparative example, while it was 0.157 for Example 1, which was a good result.

Claims

1. A composite yarn consisting of a central yarn made of a modified cross-section yarn and an ATY yarn wound around the central yarn.

2. The composite yarn according to claim 1, wherein the central yarn is a cross-section yarn.

3. The composite yarn according to claim 1 or 2, characterized in that the central yarn contains ceramic, contains jade, or contains both ceramic and jade.

4. A fabric made of composite yarn consisting of a central yarn made of an irregular cross-section yarn and an ATY yarn wound around the central yarn.

5. A fabric characterized in that a composite yarn consisting of a central yarn made of a modified cross-section yarn and an ATY yarn wound around the central yarn is used on only one side or both sides of the fabric.

6. The fabric according to claim 4 or 5, characterized in that the central thread is a cross-section thread.

7. The fabric according to claim 6, characterized in that the central thread contains ceramic and / or jade.

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