Fabric, garment, and method for producing fabric

Abstract

[Problem] To provide a fabric that achieves both a function of dissipating heat from the fabric and stretchability of the fabric. [Solution] A fabric 1 includes a base fabric 2 and a printed layer 3 printed on the front side of the base fabric 2. In the fabric 1, the printed layer 3 contains a functional material powder having a function of dissipating heat from the fabric 1. On the front side of the base fabric 2, a pattern 5 is formed in which a large number of printed portions 3a constituting the printed layer 3 are repeatedly arranged in two dimensions. In the region where the pattern 5 is formed, the area ratio of the printed layer 3 in the region where the pattern 5 is formed is between 35% and 65% (both inclusive), and the individual area of the printed portion 3a is 7 mm2 or less.

Description

Fabric, garment, and fabric manufacturing method

[0001] The present invention relates to fabrics and the like used for clothing and the like.

[0002] Fabrics with various functions have been developed. Patent Document 1 describes a cooling fabric that can maintain a cooling effect for a longer period of time. This cooling fabric uses a cooling material layer containing microcapsules containing a phase transition material with a melting point of 20 to 39°C, as well as a contact cooling material consisting of at least one material selected from water-absorbent resins, gel-like substances, and silicone resins. When the fabric comes into contact with the body, both heat absorption due to the dissolution of the phase transition material contained in the microcapsules and heat absorption due to the contact cooling material act. The cooling fabric of Patent Document 1 is used in textile products (such as mattress pads, futon covers, and futons) on which other fabrics are laminated.

[0003] Japanese Patent Application Laid-Open No. 2021-66995

[0004] The inventors of the present application conceived of providing a base fabric with a printed layer containing a functional material powder that has the function of releasing heat (hereinafter sometimes referred to as "heat release function") in order to realize clothing that retains almost no heat when worn by a person. In this case, the heat release function increases in proportion to the area ratio of the printed layer in the base fabric. However, if the area ratio of the printed layer is too large or if the individual printed portions that make up the printed layer are too large, there is a risk that the stretchability of the fabric (particularly the stretch-back ability, which shrinks after being stretched) will decrease.

[0005] The present invention has been made in view of the above circumstances, and aims to realize a fabric that combines the function of releasing heat from the fabric with stretchability.

[0006] The inventors of the present application came up with the idea of ​​forming a pattern on the front side of a base fabric in which a large number of printed parts constituting the printed layer are repeatedly arranged two-dimensionally, while ensuring the area ratio of the printed layer, thereby reducing the area of ​​each printed part. A first invention based on this idea is a fabric comprising a base fabric and a printed layer printed on the front side of the base fabric, in which the printed layer contains a functional material powder having the function of dissipating heat from the fabric, and on the front side of the base fabric, a pattern is formed in which a large number of printed parts constituting the printed layer are repeatedly arranged two-dimensionally, and in the pattern formation region, the area ratio of the printed layer is 35% to 65% and the area of ​​each printed part is 7 mm ２ Below is the dough.

[0007] In a second aspect of the present invention, in the first aspect, the printed layer contains only polycrystalline polysilicon as the functional material powder having the function of releasing heat from the fabric.

[0008] In a third aspect of the present invention, in the first aspect, the fabric portion in the pattern formation area has a heat retention rate of 6.0% or more and 8.2% or less.

[0009] In a fourth aspect of the present invention, in the first aspect, a pattern is formed over the entire surface of the front side of the base fabric.

[0010] A fifth invention is clothing made using the fabric of any one of the first to fourth inventions.

[0011] The sixth invention is a method for manufacturing a fabric, which includes a printing step of printing the front side of a base fabric with a printing device using ink containing at least a functional material powder that has the function of releasing heat from the fabric and a binder, to form a printed layer on the front side of the base fabric, and the printing step is a step of forming a pattern on the front side of the base fabric, in which a large number of printed parts that make up the printed layer are repeatedly arranged two-dimensionally, and the pattern on the printing data used as input data for the printing device has an area ratio of the printed layer of 30% to 60% in the pattern formation region, and the area of ​​each printed part is 6 mm ２ The following is the method for manufacturing the dough.

[0012] In the present invention, in the pattern forming region on the front side of the base fabric, the area ratio of the printed layer (the ratio of the total area of ​​the printed part to the area of ​​the pattern forming region) is 35% or more and 65% or less, and the area of ​​each printed part is 7 mm ２ In other words, the fabric according to the present invention has an area of ​​7 mm2 or less while ensuring that the area ratio of the printed layer is 35% or more and 65% or less in the pattern forming area (area provided with a heat dissipation function). ２ The following small printed areas (for example, when the planar shape of the printed area is square, the length of each side is 2.65 mm or less) are repeatedly arranged in two dimensions. This makes it possible to realize a fabric that combines the function of releasing heat from the fabric with the fabric's elasticity.

[0013] 1 and 2 are perspective and cross-sectional views of the front side of a fabric according to an embodiment of the present invention;

[0014] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the following embodiments are merely examples of the present invention and are not intended to limit the scope of the present invention, its applications, or its uses.

[0015] [About the Fabric] This embodiment is a fabric 1 that has been subjected to a heat dissipation treatment to release heat. As shown in Figures 1 and 2, the fabric 1 includes a base fabric 2 and a printed layer 3 printed on the front side of the base fabric 2. The printed layer 3 contains a functional material powder that has the function of releasing heat (heat dissipation function) from the fabric 1. The printed layer 3 contains only polycrystalline polysilicon as the functional material powder that has the heat dissipation function.

[0016] The base fabric 2 is a fabric used as a material for clothing and the like. When the base fabric 2 is used in clothing, the front side of the base fabric 2 becomes the outside of the clothing. In the case of clothing that is worn directly, such as a shirt (clothing made of a single piece of fabric 1), the wearer's body comes into contact with the back side of the base fabric 2.

[0017] A woven fabric or nonwoven fabric having a high cooling sensation value (QMAX) can be used for the base fabric 2. The cooling sensation value (QMAX) is, for example, 0.2 W / cm ２The coolness to touch value (QMAX) is measured based on JIS L1927.

[0018] The base fabric 2 may be a woven fabric made from yarns using plant fibers (cotton, linen, etc.), animal fibers (silk, etc.), synthetic fibers (nylon, polyester, acrylic, etc.), regenerated fibers (Tencel, etc.), or semi-synthetic fibers, or a yarn made from a blend of two or more types of fibers selected from these fibers, or a nonwoven fabric made from one or more of the above-mentioned fibers. Specific examples of the base fabric 2 include fabrics made from high molecular weight polyethylene fibers and fabrics made from nylon fibers.

[0019] The printed layer 3 is made up of a large number of printed portions 3a. On the front side of the fabric 1, a pattern 5 is formed in which the large number of printed portions 3a constituting the printed layer 3 are repeatedly arranged two-dimensionally. That is, a predetermined pattern 5 is depicted by the large number of printed portions 3a. In the pattern 5, each printed portion 3a represents a single figure. The planar shape of this figure (printed portion 3a) is not particularly limited, and may be, for example, a rectangle, a circle, or a shape resembling an animal.

[0020] As shown in Fig. 1(a), the design 5 can be a design in which a large number of printed portions 3a are regularly arranged. In this case, the large number of printed portions 3a are repeatedly arranged two-dimensionally at a constant pitch P. However, the design 5 can also be a design in which a large number of printed portions 3a are irregularly arranged.

[0021] The printed sections 3a may be arranged in a staggered pattern as shown in Figures 1(a) and 1(b), or in other patterns (such as a block pattern or a parallel pattern). For example, in the case of a staggered pattern, the printed sections 3a may be arranged in two directions, the vertical and horizontal directions, or in other directions (a combination of diagonal directions). Adjacent printed sections 3a in the arrangement direction (vertical or horizontal) are spaced apart, but may partially overlap adjacent printed sections 3a in a row, as shown in Figure 1(a), or may not overlap adjacent printed sections 3a in a row, as shown in Figure 1(b).

[0022] In the pattern 5 formation region (printed layer 3), the repeat pitch (repeat) of each pattern (printed portion 3a) of the pattern 5 is relatively short, for example, 3 mm or less (preferably 2.5 mm or less) in both the vertical and horizontal directions. Also, in the pattern 5 formation region, the area of ​​each printed portion 3a is 7 mm ２ Less than 5 mm (preferably ２ The color of the printed layer 3 (each printed portion 3a) is a grayish color so that the fabric 1 looks cool. However, the color of the printed layer 3 is not limited to a grayish color.

[0023] The pattern 5 is formed over the entire surface of the front side of the base fabric 2. In other words, the pattern 5 is drawn over the entire surface of the front side of the fabric 1 (the entire area of ​​the base fabric 2). Note that the pattern 5 occupies most (e.g., 70% or more) of the entire area of ​​the front side of the garment fabric 1, but there may be areas where the printed layer 3 (pattern 5) is absent.

[0024] In the area where the pattern 5 is formed, the area ratio (area rate) of the printed layer 3 to the area of ​​that area is, for example, 35% to 65%. Because the area ratio of the printed layer 3 is ensured in the fabric part where the pattern 5 is formed, the heat dissipation function is high and the heat retention rate is 6.0% to 8.2% (preferably 6.0% to 8.0%).

[0025] In this embodiment, the printed layer 3 contains only polysilicon as a functional material powder (ceramic powder) that has the function of releasing heat (heat dissipation function) from the fabric 1. Here, polysilicon is a semiconductor made from silicon, and has good thermal conductivity and high thermal diffusivity. Note that a functional material with a heat dissipation function is a substance with a thermal conductivity of 50 W / m·k or more.

[0026] [Regarding Fabric Manufacturing Method] Next, a description will be given of a manufacturing method for the fabric 1. The manufacturing method for the fabric 1 involves carrying out, in this order, an ink manufacturing process for manufacturing ink and a printing process for printing on one side (front side) of the base fabric 2 with the ink obtained in the ink manufacturing process.

[0027] In the ink manufacturing process, the ink materials are prepared as follows: a functional material powder (powder of an active ingredient) for dissipating heat from the fabric 1, and materials other than the functional material. Polysilicon powder is prepared as the functional material powder. A binder (printing glue) is prepared as the other material. The ink is manufactured by kneading the polysilicon powder into the binder in a compounding ratio such that the polysilicon powder accounts for 3% to 5% by weight of all the ink materials.

[0028] Since it is possible to use a binder with a thinner resin coating by pulverizing polycrystalline polysilicon, a soft type binder is used as the binder. A soft type binder is a resin with a soft texture. By using a soft type binder, the fabric 1 becomes pleasant to the touch. An acrylic acid ester can be used as the soft type binder.

[0029] In the printing process, the base fabric 2 is set in a printing device, and the ink obtained in the ink production process is used to print on the front side of the base fabric 2, forming a pattern 5 consisting of a printing layer 3 on the base fabric 2. As the printing device, a machine printing machine, a rotary printing machine, a screen table, an auto-screen machine, or the like can be used. Through the above processes, the fabric 1 according to the embodiment is completed.

[0030] The dimensions of the printed portions 3a printed on the base fabric 2 are larger than the dimensions of each printed portion 3a of the design 5 on the printing data used as input data for the printing device. This is because the ink diffuses slightly on the base fabric 2 when printing with the printing device. For example, the design 5 on the printing data has an area ratio of the printed layer of 30% to 60% in the area where the design 5 is formed, and each area of ​​the printed portions 3a is 6 mm. ２ Less than 4.5 mm (preferably ２ The degree of ink diffusion in the base fabric 2 differs depending on the type of base fabric 2, etc.

[0031] Fabric 1 can be used for general clothing fabrics. For example, Fabric 1 can be used as a fabric for shirts (T-shirts, long-sleeved T-shirts, etc.) made from a single piece of fabric, the lining of a suit jacket, suit trousers, a thin blouson jacket, etc. Fabric 1 can also be used as a fabric for tents.

[0032] [Effects of the embodiment] In the present embodiment, the area ratio of the printed layer 3 in the area where the pattern 5 is formed on the front side of the base fabric 2 is 35% or more and 65% or less, and the area of ​​each printed portion 3a is 7 mm ２ That is, in the fabric 1 according to the present embodiment, in the pattern 5 formation region (region provided with a heat dissipation function), the area ratio of the printed layer 3 is secured to be 35% or more and 65% or less, and the area is 7 mm ２ The following small printed portions 3a are arranged two-dimensionally in a repeated manner. Therefore, it is possible to realize a fabric 1 that has both the function of releasing heat from the fabric 1 and the stretchability of the fabric.

[0033] In this embodiment, only polycrystalline polysilicon is used as the functional material powder for the printing layer 3. The ink used for printing on the base fabric 2 contains only polycrystalline polysilicon as the functional material powder.

[0034] The inventors of the present application focused on the properties of polysilicon (polycrystalline silicon), a type of semiconductor, and conducted extensive research into processing methods for fabric 1 that can effectively dissipate heat from fabric 1. As a result, they discovered that printing on the front side of base fabric 2 using ink containing only polysilicon as its active ingredient can effectively dissipate heat from fabric 1. Polysilicon is a silicon-based semiconductor that has good thermal conductivity and high thermal diffusivity, is easily available, and is safe for humans. Printed layer 3, which contains only polysilicon as its active ingredient, converts heat from the heat source into electromagnetic wave energy, which moves, absorbs, and diffuses it in the opposite direction of fabric 1. Rather than becoming cold, fabric 1 has the function of continuously releasing thermal energy to the outside of fabric 1 (i.e., it continuously releases thermal energy that accumulates inside fabric 1 to the outside rather than allowing it to remain there). According to this embodiment, it is possible to provide a manufacturing method for fabric 1 that can effectively release heat from fabric 1 (release heat that accumulates inside the fibers of fabric 1 to the outside) despite having a simple composition.

[0035] The fabric 1 according to this embodiment removes heat that accumulates inside the fabric, and in clothing using the fabric 1, heat that accumulates between the human body and the clothing is converted into electromagnetic waves and released to the outside of the clothing. This reduces discomfort inside the clothing. This embodiment can provide a method for manufacturing the fabric 1, which has a simple composition but can effectively release heat, for example, as a measure against heat.

[0036] Polysilicon has the property of blocking various types of light. Therefore, fabric 1 can also have the effect of blocking ultraviolet rays and far infrared rays. Due to the latter effect, clothing made using fabric 1 lowers the perceived temperature. However, cool-to-the-touch fabrics with good thermal conductivity have the drawback of losing their functionality over time. In contrast, this embodiment can prevent this drawback, and maintain the cooling function.

[0037] The present invention will be described with reference to examples. However, the present invention is not limited to these examples as long as the scope of the invention is not exceeded.

[0038] [Test 1: Comparative Test Using a Test Method Simulating the 45-Degree Parallel Re-Irradiation Method] To verify the effectiveness of printing using ink containing only polysilicon as the functional material powder, a comparative test was conducted using a test method simulating the 45-degree parallel re-irradiation method. For this test, printed test samples (Examples 1-3) and unprinted control samples (Comparative Examples 1-3) were prepared for each of the three base fabrics shown in Table 1. In Table 1, "Ny" stands for nylon, "PE" stands for polyester, and "Pu" stands for polyurethane.

[0039] The test sample with printing processing had a printed layer formed on the front side of the base fabric. On the front side of the base fabric, a pattern was drawn over the entire surface, with many printed parts constituting the printed layer being arranged two-dimensionally repeatedly. In the area where the pattern was drawn, the area ratio of the printed layer to the total area of ​​the front side of the base fabric was 50%, and the area of ​​each figure (area of ​​the printed part) was 5 mm ２ On the other hand, the control sample without printing was made of the same base fabric as the test sample, but without a printed layer. This also applies to Test 2 and subsequent tests described below.

[0040] The test method used in this example involved mounting a test sample (example) and a control sample (comparison example) side by side on a sample stage tilted at 45°, setting a 90°C hot plate 15 cm in front of them parallel to each other, measuring the surface temperatures of both samples with a thermoviewer, and determining the temperature difference.

[0041]

[0042] Table 2 shows the surface temperatures of the Example and Comparative Examples, as well as the temperature difference between them, for each sample over time. This test confirmed that printing can provide a good heat dissipation effect. The inventors of the present application also conducted comparative tests with and without printing on 100% cotton fabric, Tencel (registered trademark) blend fabric, and cool-to-the-touch nylon fabric, in addition to the base fabric shown in Table 1, and confirmed that a good heat dissipation effect could be achieved.

[0043]

[0044] [Test 2: Testing for Heat Retention Rate, Thermal Resistance, etc.] If the heat dissipation effect of a fabric is high, the heat retention rate will be low and the CLO value (clo), which represents thermal resistance, will be small. Therefore, to verify the heat dissipation effect of a fabric in which a printed layer is formed using an ink containing only polysilicon as a functional material powder with heat dissipation function, the heat retention rate, CLO value, and intrinsic heat transfer coefficient were measured for each of the printed test samples (Examples 4-5) and the unprinted control samples (Comparative Examples 4-5) using an ASTM heat retention tester in accordance with ASTM D 1518-85. This measurement test was conducted at room temperature of 20°C and relative humidity of 65%. The measurement results are shown in Table 3.

[0045] The test samples with printing processing had a printed layer formed on the front side of the base fabric. Regarding the type of base fabric, nylon smooth material was used in Example 4 and Comparative Example 4, and polyester talf material was used in Example 5 and Comparative Example 5. On the front side of the base fabric, a pattern consisting of numerous printed parts arranged two-dimensionally and repeatedly was drawn over the entire surface. This is also the case with Comparative Example 6 described below. In the pattern formation region, the area ratio of the printed layer to the total area of ​​the front side of the base fabric was 50%, and the area of ​​each printed part was 5 mm. ２ The pattern on the printing data has a print layer area ratio of 40% in the pattern formation area, and the individual areas of the print parts 3a are 4 mm ２ It was.

[0046]

[0047] According to Table 3, the heat retention rate exceeded 8.2% in Comparative Example 4-5, whereas it was 8.2% or less in Example 4-5. Furthermore, the intrinsic heat transfer coefficient was 130 W / m ２ ・K, whereas in Example 4-5 it was 130 W / m ２ ・It became K or above.

[0048] [Test 3: Sensory Test] A sensory test was conducted to examine the degree of heat release perceived by subjects for each of the fabrics in Examples 4-5 and Comparative Examples 4-5. A control sample (Comparative Example 6), which had a printed layer area ratio of 20%, was also tested in the sensory test. Comparative Example 6 used the same nylon smooth material as Example 4 as the base fabric. Three subjects participated in the sensory test. For each of the fabrics in Examples 4-5 and Comparative Examples 4-6, 25 cm square pieces (approximately the size of a handkerchief) were prepared and placed over the thighs of both legs. While all subjects felt that heat accumulated in the fabric in Comparative Example 4-6 and their thighs were warmed, they did not feel any warmth in Examples 4-5, confirming that a high heat release effect was achieved. Because the area ratio of the printed layer in Comparative Example 6 was significantly smaller than that of Example 4, which had a heat retention rate of 8%, it is estimated that the heat retention rate exceeds 8.2%. Sensory tests confirmed that fabrics with a heat retention rate of 6% or more and 8.2% or less have sufficient heat dissipation effect to be used as clothing fabrics in which almost no heat accumulates when worn by a person.

[0049] Here, in order to further enhance the heat dissipation effect (to further reduce the heat retention rate), it is conceivable to further increase the area ratio of the printed layer or to further increase the area of ​​each printed part, but in this case, there is a risk that the stretchability of the fabric (especially the stretch-back property) will decrease. On the other hand, for fabrics with a heat retention rate of 6% or more and 8.2% or less, the area ratio of the printed layer is 50% (35% or more and 65% or less) and the area of ​​each printed part is 5 mm ２ (7mm ２ This can be achieved by using the following materials (described below), which not only allows heat to escape from the fabric but also provides good stretchability (especially stretch-back properties) of the fabric.

[0050] The present invention is applicable to fabrics used in clothing and the like.

[0051] 1 Fabric 2 Base fabric 3 Printed layer 3a Printed portion 5 Design

Claims

1. A fabric comprising a base fabric and a printed layer printed on the front side of the base fabric, the printed layer containing a functional material powder having a function of releasing heat from the fabric, a pattern is formed on the front side of the base fabric in which a number of printed parts constituting the printed layer are repeatedly arranged two-dimensionally, and in the region in which the pattern is formed, the area ratio of the printed layer is 35% or more and 65% or less, and each of the printed parts has an area of ​​7 mm ２ Below is the dough.

2. The fabric according to claim 1, wherein the printed layer contains only polycrystalline polysilicon as a functional material powder having the function of releasing heat from the fabric.

3. The fabric according to claim 1, wherein the fabric portion in the pattern forming area has a heat retention rate of 6.0% or more and 8.2% or less.

4. The fabric according to claim 1, wherein the pattern is formed over the entire surface of the front side of the base fabric.

5. Clothing made from the fabric according to any one of claims 1 to 4.

6. A method for manufacturing a fabric, comprising the steps of: printing the front side of a base fabric with a printing device using ink containing at least a functional material powder having a function of releasing heat from the fabric and a binder; forming a printed layer on the front side of the base fabric; the printing step is a step of forming a pattern on the front side of the base fabric in which a number of printed parts constituting the printed layer are repeatedly arranged two-dimensionally; and the pattern on the printing data used as input data for the printing device is such that the area ratio of the printed layer in the pattern formation region is 30% or more and 60% or less, and the individual area of ​​the printed parts is 6 mm or less. ２ The method for producing the dough is as follows.

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