Fabric, garment, and method for producing fabric

Abstract

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 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%, inclusive, and the individual area of the printed portion 3a is 7 mm2 or less.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] Fabrics with various functions have been developed. Patent Document 1 describes a cooling fabric that can maintain the cooling effect for a longer period of time. This cooling fabric uses a cooling material layer that contains at least one contact cooling material selected from water-absorbent resins, gel-like substances, and silicone resins in addition to microcapsules containing a phase transition material with a melting point of 20 to 39°C, so that when the body comes into contact with the fabric, 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 for textile products (bed pads, futon covers, futons, etc.) on which other fabrics are laminated. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-66995 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, the inventors of the present application came up with the idea of ​​providing a printed layer containing a functional material powder having a function of releasing heat (hereinafter sometimes referred to as "heat release function") on a base fabric in order to realize clothing that hardly accumulates heat in the fabric when worn by a person. In this case, the heat release function increases in proportion to the increase in the area ratio of the printed layer on the base fabric. However, if the area ratio of the printed layer is made too large, or if the individual printed parts that make up the printed layer are made too large, there is a risk that the stretchability of the fabric (especially the stretch-back property that shrinks after being stretched) will decrease.

[0005] The present invention has been made in consideration of the above circumstances, and has an object to realize a fabric that combines the function of releasing heat from the fabric with stretchability. [Means for solving the problem]

[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, the printed layer contains a functional material powder having the function of releasing heat from the fabric, a pattern is formed on the front side of the base fabric 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% or more and 65% or less, 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 of the present invention, the printed layer contains only polycrystalline polysilicon as the functional material powder having the function of releasing heat from the fabric.

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

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

[0010] The 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 having a function of releasing heat from the fabric and a binder, to form a printed layer on the front side of the base fabric, the printing step being 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 areas of the printed parts are 6 mm 2 The following is a method for producing the dough. Effect of the Invention

[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% to 65%, 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 in the pattern forming area (area provided with a heat dissipation function) is 35% or more and 65% or less. 2 The following small printed areas (for example, when the planar shape of the printed area is a square, the length of each side is 2.65 mm or less) are repeatedly arranged two-dimensionally. This makes it possible to realize a fabric that has both the ability to release heat from the fabric and the stretchability of the fabric. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a perspective view of the front side of a fabric according to an embodiment. [Diagram 2] FIG. 2 is a cross-sectional view of the front side of the fabric according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. Note that the following embodiment is merely an example of the present invention, and is 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 Figs. 1 and 2, the fabric 1 comprises 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 a function of releasing heat from the fabric 1 (heat dissipation function). The printed layer 3 contains only polycrystalline polysilicon as the functional material powder that has a heat dissipation function.

[0016] The base fabric 2 is a fabric used as a material for clothing and the like. Regarding the front and back of the base fabric 2, when the base fabric 2 is used for 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 contact cooling value (QMAX) can be used for the base fabric 2. The contact cooling value (QMAX) is, for example, 0.2 W / cm 2 The cool touch value (QMAX) is measured based on JIS L1927.

[0018] For the base fabric 2, a woven fabric manufactured using yarns made of vegetable fibers (cotton, hemp, etc.), animal fibers (silk, etc.), synthetic fibers (nylon, polyester, acrylic, etc.), regenerated fibers (tencel, etc.) or semi-synthetic fibers, or yarns made by blending two or more types of fibers selected from these fibers, etc., can be used, or a nonwoven fabric made of one or more types of the above-mentioned fibers, etc. Specific examples of the base fabric 2 that can be used include fabrics made of high molecular weight polyethylene fibers and fabrics made of nylon fibers.

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

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

[0021] The printed sections 3a may be arranged in a staggered pattern as shown in Fig. 1(a) and Fig. 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 direction and the horizontal direction, or in other directions (a combination of diagonal directions). The printed sections 3a adjacent to each other in the arrangement direction (vertical direction or horizontal direction) are arranged at intervals from each other, and may partially overlap the printed sections 3a adjacent to each other in a row as shown in Fig. 1(a), or may not overlap the printed sections 3a adjacent to each other in a row as shown in Fig. 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 5mm (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 of the total area of ​​the front side of the fabric 1 of the garment (e.g., 70% or more), but there may be some 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 ​​the area is, for example, 35% to 65%. Since the area ratio of the printed layer 3 is ensured in the fabric part of the area 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 substrate 1. Here, polysilicon is a type of 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] [About the manufacturing process of the fabric] 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, a functional material powder (powder of an active ingredient) for releasing heat from the fabric 1 and materials other than the functional material are prepared as ink materials. Polysilicon powder is prepared as the functional material powder. A binder (printing paste) is prepared as the material other than the functional material. Then, the polysilicon powder is mixed with the binder in a compounding ratio such that the polysilicon powder accounts for 3% to 5% by weight of the total ink materials, thereby manufacturing the ink.

[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. As a soft type binder, an acrylic acid ester can be used.

[0029] In the printing process, the base fabric 2 is set on 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 by the printing device, 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 process, the fabric 1 according to the embodiment is completed.

[0030] The dimensions of the printed parts 3a printed on the base fabric 2 are larger than the dimensions of each printed part 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 of the printed parts 3a has an area of ​​6 mm. 2 Less than 4.5mm (preferably 2 The degree of diffusion of the ink on the base fabric 2 varies depending on the type of base fabric 2, etc.

[0031] Fabric 1 can be used for all types of clothing. For example, fabric 1 can be used as a shirt (T-shirt, long-sleeved T-shirt, 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 tent fabric.

[0032] [Effects of the embodiment] In this 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 part 3a is 7 mm 2 That is, in the fabric 1 according to the present embodiment, in the region where the pattern 5 is formed (the region where the heat dissipation function is imparted), the area ratio of the printed layer 3 is 35% or more and 65% or less, and the area is 7 mm 2 The following small printed parts 3a are arranged repeatedly in a two-dimensional 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 print layer 3. The ink used for printing on the base fabric 2 contains only polycrystalline polysilicon as the functional material powder.

[0034] Here, the inventor of the present application focused on the properties of polysilicon (polycrystalline silicon), which is a type of semiconductor, and as a result of intensive research into a processing method for the fabric 1 that can effectively release heat from the fabric 1, found that by printing on the front side of the base fabric 2 using ink containing only polysilicon as an active ingredient, a good heat release effect of releasing heat from the fabric 1 can be obtained. Polysilicon is a type of semiconductor made from silicon, and has good thermal conductivity and high thermal diffusivity, is an easily available raw material, and is safe for the human body. The printing layer 3, which contains only polysilicon as an active ingredient, converts the heat on the heat source side into electromagnetic wave energy, which moves, absorbs, and diffuses in the opposite direction of the fabric 1. The fabric 1 does not become cold, but has the function of continuously releasing thermal energy to the outside of the fabric 1 (i.e., the function of not allowing the thermal energy accumulated inside the fabric 1 to remain there, but continuing to release it to the outside). According to this embodiment, a manufacturing method for fabric 1 can be provided that has a simple composition yet can effectively release heat from fabric 1 (release heat that accumulates inside the fibers of fabric 1 to the outside).

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

[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 using fabric 1 lowers the perceived temperature. Here, cool-to-the-touch fabrics with good thermal conductivity have a weakness in that their function decreases over time. In contrast, this embodiment can prevent this weakness of function loss and maintain the cooling function. EXAMPLES

[0037] The present invention will be described with reference to examples. However, the present invention is not limited to the examples as long as it does not depart from the gist of the invention.

[0038] [Test 1: Comparison test using a test method simulating the 45-degree parallel re-radiation method] In order to verify the effectiveness of the printing process, which uses ink containing only polysilicon as functional material powder, a comparative test was conducted using a test method simulating the 45-degree parallel re-emission method. In this test, test samples with printing (Examples 1-3) and control samples without printing (Comparative Examples 1-3) were prepared for each of the three types of base fabric 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 was a printed layer formed on the front side of the base material. On the front side of the base material, a pattern was drawn over the entire surface, with numerous printed parts that make up the printed layer arranged in a two-dimensional repeated pattern. 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 material was 50%, and the area of ​​each part of the pattern (the area of ​​the printed part) was 5 mm2. 2 On the other hand, the control sample without printing was made of the same base material as the test sample, but without a printed layer. This was the same for Test 2 and onwards, which will be described later.

[0040] The test method used in this embodiment involves mounting a test sample (embodiment) and a control sample (comparison example) side by side on a sample stage inclined 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] [Table 1]

[0042] Table 2 shows the surface temperature of the Example, the surface temperature of the Comparative Example, and the temperature difference between them for each sample at each elapsed time. This test confirmed that the printing process provides 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) blended 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 was obtained.

[0043] [Table 2]

[0044] [Test 2: Tests for heat retention, thermal resistance, etc.] When the heat dissipation effect of the fabric is high, the heat retention rate is low and the CLO value (clo), which indicates thermal resistance, is small. Therefore, in order to verify the heat dissipation effect of the fabric in which the printed layer is formed using an ink containing only polysilicon as a functional material powder having a heat dissipation function, the heat retention rate, CLO value, and intrinsic heat transfer coefficient were measured for each sample of the test sample with printing (Example 4-5) and the control sample without printing (Comparative Example 4-5) using an ASTM type heat retention tester in accordance with ASTM D 1518-85. This measurement test was performed in an environment of 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, while polyester talf material was used in Example 5 and Comparative Example 5. On the front side of the base fabric, a pattern was drawn over the entire surface, with numerous printed parts arranged repeatedly in a two-dimensional manner. This is also the same as in Comparative Example 6 described below. In the area where the pattern was formed, 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 region, and the area of ​​each print part 3a is 4 mm 2 It was.

[0046] [Table 3]

[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. Also, the specific heat transfer coefficient was 130 W / m 2 ·K, whereas in Example 4-5 it was 130 W / m 2 It was K or higher.

[0048] [Test 3: Sensory test] A sensory test was conducted to examine the degree of heat release felt by subjects for each of the fabrics of Examples 4-5 and Comparative Examples 4-5. In the sensory test, a control sample (Comparative Example 6) with a printed layer area ratio of 20% was also tested. In Comparative Example 6, the same nylon smooth material as in Example 4 was used as the base fabric. There were three subjects. In the sensory test, a 25 cm square (about the size of a handkerchief) was prepared for each of the fabrics of Examples 4-5 and Comparative Examples 4-6, and was placed over the thighs of both legs from above. In Comparative Example 4-6, all subjects felt that heat had accumulated in the fabric and their thighs were warmed, whereas in Example 4-5, they did not feel that their thighs were warmed, confirming that a high heat release effect was obtained. In Comparative Example 6, the area ratio of the printed layer is significantly smaller than that of Example 4, which has a heat retention rate of 8%, so it is estimated that the heat retention rate exceeds 8.2%. Sensory tests confirmed that fabrics with a thermal insulation rate of 6% to 8.2% 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 increase the heat dissipation effect (to further reduce the heat retention rate), it is possible to increase the area ratio of the printed layer or the area of ​​each printed part, but in this case, there is a risk that the elasticity of the fabric (especially the stretch-back property) will decrease. On the other hand, for fabrics with a heat retention rate of 6% to 8.2%, the area ratio of the printed layer is 50% (35% to 65%) and the area of ​​each printed part is 5 mm 2 (7mm 2 This can be achieved by using the following materials (see below), which not only allows heat to escape from the fabric, but also provides good elasticity (especially stretch back). [Industrial Applicability]

[0050] The present invention is applicable to fabrics used for clothing and the like. [Explanation of symbols]

[0051] 1. Fabric 2. Base fabric 3 printing layer 3a Printing Department 5 Design

Claims

1. The base fabric and A fabric having a printing layer printed on the front side of the base fabric, The printed layer contains a functional material powder having a function of releasing heat from the fabric, On the front side of the base fabric, a pattern is formed in which a large number of printed parts constituting the printing layer are repeatedly arranged two-dimensionally, In the pattern forming region, the area ratio of the printed layer is 35% or more and 65% or less, and each printed portion 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. A garment made of the fabric according to any one of claims 1 to 4.

6. A method for manufacturing a fabric, comprising the steps of: printing on a front side of a base fabric by a printing device using ink containing at least a functional material powder having a function of releasing heat from the fabric and a binder; and forming a printing layer on the front side of the base fabric, The printing process is a process of forming a pattern in which a large number of printed parts constituting the printing layer are repeatedly arranged two-dimensionally on the front side of the base fabric, 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 area, and each printed portion has an area of ​​6 mm ２ The method for producing the dough is as follows.

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