Thermal fabric for clothing and clothing using the same

Abstract

To provide a heat insulating fabric for clothing and clothing using the same in which: by using a specific double weave texture which includes a normal yarn and a multifilament yarn made of a polyester containing a heat-accumulating agent and having the multifilament yarn napped, any design of the appearance of a fabric is allowed even if a normal yarn is used; and by making a backing fabric into a napped layer, the touch feeling is improved and a heat insulating property of the fabric is improved.SOLUTION: In a heat insulating fabric for clothing having a double weave texture and clothing using the same, a yarn forming the double weave texture includes a normal yarn and a multifilament yarn made of a polyester containing a heat-accumulating agent. The multifilament yarn made of the polyester containing the heat-accumulating agent is exposed most abundantly on one side of the double weave texture; the normal yarn is exposed most abundantly on the other side of the double weave texture; and the multifilament yarn made of the polyester and exposed on the one side of the double weave texture is in a napped state.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a thermal fabric for clothing and clothing using the same. [Background technology]

[0002] Fabrics that utilize a double weave to enhance heat retention are known. For example, Patent Document 1 below describes a double weave fabric that uses AB fiber for the warp and weft of the back weave, and CD fiber for the weft of the front weave. The double weave fabric has a five-ply satin weave on the front side and a 2 / 3 twill weave on the back side.

[0003] AB fiber is said to be made by feeding PET and 2-ethylhexyl acrylate copolymer PST in a weight ratio of 50:50, spinning them into a polymer-interlocked fiber, and then heating and stretching it. CD fiber is said to be made by feeding an island component of PET and a sea component of 2-ethylhexyl acrylate copolymer PST in a weight ratio of 80:20, spinning them into a sea-island polymer-interlocked fiber, and then heating and stretching it.

[0004] The document states that the double-layered fabric made of the above-mentioned AB fiber and CD fiber is treated with Triclean to dissolve the 2-ethylhexyl acrylate copolymer PST. The sheet-like material thus obtained is said to have one side covered with layered hollow fibers and the other side covered with mainly 0.0013 denier ultrafine fibers. This sheet-like fabric is said to have excellent flexibility, heat retention, adhesion, and water absorption. It also states that the surface of the sheet-like material covered with ultrafine fibers is brushed. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 63-249740 Summary of the Invention [Problem to be solved by the invention]

[0006] In the sheet material of Patent Document 1, the 2-ethylhexyl acrylate copolymer PST is dissolved and removed by treating it with Triclean, which appears to result in a structure in which one side of the sheet material has layered cavities and is primarily composed of PET threads, while the other side of the sheet material is primarily composed of ultrafine PET threads.

[0007] The sheet-like material described in Patent Document 1 mainly contains yarns with layered cavities on one side of the fabric. The appearance of the fabric is limited by the PST yarns with layered cavities arranged on one side of the fabric. This limits the design of products obtained by sewing the fabric. Furthermore, since the sheet-like material in Patent Document 1 uses yarns with layered cavities, it may have improved heat retention compared to ordinary fabrics, but there is still room for further improvement in heat retention.

[0008] The present invention aims to provide a heat-retaining fabric for clothing, which includes ordinary yarn and polyester multifilament yarn containing a heat storage material, and which utilizes a specific double weave structure in which the multifilament yarn is raised, thereby enabling free design of the appearance of the fabric using ordinary yarn, improving the feel of the fabric as a raised layer on the lining of the fabric, and improving the heat retention of the fabric, and to provide clothing using the same. [Means for solving the problem]

[0009] The above-mentioned problems are solved by a thermal fabric for clothing (hereinafter sometimes simply referred to as the fabric) that is made of a double weave, in which the yarns constituting the double weave include ordinary yarns and polyester multifilament yarns containing a heat storage material, with the polyester multifilament yarns containing the heat storage material being most exposed on one side of the double weave and the ordinary yarns being most exposed on the other side of the double weave, and the polyester multifilament yarns exposed on one side of the double weave being in a brushed state. In this fabric, because the ordinary yarns are most exposed on the other side of the fabric, the appearance of the fabric is less affected by the polyester multifilament yarns containing the heat storage material. The polyester multifilament yarns that are most exposed on one side of the fabric are brushed, and the fabric exhibits a heat-retaining effect due to the brushed layer. Furthermore, because the brushed layer is made of tiny fibers of the polyester multifilament yarns that are raised, the fibers that make up the brushed layer are tiny, resulting in a powdery, smooth feel. Furthermore, the polyester multifilament yarn contains a heat storage material, which stores heat when exposed to the wearer's body heat or sunlight, further enhancing the heat retention effect.

[0010] The above problem is solved by a garment made of the thermal fabric for clothing, in which one side of the double weave, on which the brushed polyester multifilament yarn is most exposed, faces the wearer's skin, and the other side of the double weave, on which the plain yarn is most exposed, faces the outside of the garment. In this garment, the plain yarn is most exposed on the outside of the garment, so the appearance of the garment is less affected by the functional yarn. Furthermore, in this garment, the brushed polyester multifilament yarn is most exposed on the inside of the garment, so the garment feels good against the skin and has excellent heat retention.

[0011] In the fabric, it is preferable that the yarns constituting the double weave structure further include hollow, moisture-absorbing, heat-generating yarns. These hollow yarns can improve the insulation and moisture absorption properties of the fabric, and generate heat by moisture emitted from the wearer's skin. The heat generated by the yarns is stored in the heat storage material. The interaction of these elements can further enhance the heat retention properties of the fabric.

[0012] The fabric can be a warp double weave, a weft double weave, or a warp and weft double weave.

[0013] The fabric has a horizontal double weave, the warp yarns are ordinary yarns dyed with indigo dye, the first weft yarns arranged on the front side of the fabric are white hollow cotton yarns, the second weft yarns arranged on the back side of the fabric are polyester multifilament yarns containing the heat storage material, and the weave on the front side of the fabric can be twill weave.This makes it possible to provide clothing made of denim fabric that has better heat retention and a softer feel than conventional products. [Effects of the Invention]

[0014] According to the present invention, it is possible to provide a thermal fabric for clothing that includes ordinary yarn and a polyester multifilament yarn containing a heat storage material, and by utilizing a specific double weave structure in which the multifilament yarn is brushed, the appearance of the fabric can be freely designed using ordinary yarn, and the lining of the fabric has a brushed layer that improves the feel against the skin and improves the heat retention of the fabric, as well as clothing using the same. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a structure diagram of a thermal fabric for clothing according to a first embodiment. [Figure 2] FIG. 2 is an end view taken along the line AA in FIG. [Figure 3] FIG. 2 is a diagram showing the structure of a first structure constituting the thermal insulation fabric for clothing of FIG. 1. [Figure 4]FIG. 2 is a diagram showing the structure of a second structure constituting the thermal insulation fabric for clothing of FIG. 1. [Figure 5] FIG. 1 is a structure diagram of a thermal fabric for clothing according to a second embodiment. [Figure 6] FIG. 6 is an end view of a portion BB in FIG. 5. [Figure 7] FIG. 6 is a diagram showing the structure of a first structure constituting the thermal insulation fabric for clothing of FIG. 5. [Figure 8] FIG. 6 is a diagram showing a second structure constituting the thermal insulation fabric for clothing of FIG. 5. [Figure 9] FIG. 10 is a structure diagram of a thermal fabric for clothing according to a third embodiment. [Figure 10] FIG. 10 is an end view of a portion CC in FIG. 9. [Figure 11] FIG. 10 is a diagram showing the structure of a first structure constituting the thermal insulation fabric for clothing of FIG. 9. [Figure 12] FIG. 10 is a diagram showing the structure of a second structure constituting the thermal insulation fabric for clothing of FIG. 9. [Figure 13] FIG. 10 is a structure diagram of a thermal fabric for clothing according to a fourth embodiment. [Figure 14] FIG. 14 is a cross-sectional view taken along the line DD in FIG. [Figure 15] FIG. 14 is a diagram showing the structure of a first structure constituting the thermal insulation fabric for clothing of FIG. [Figure 16] FIG. 14 is a diagram showing a second structure constituting the thermal insulation fabric for clothing of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0016] The following describes embodiments of the thermal fabric for clothing (hereinafter, simply referred to as the fabric) of the present invention and clothing using the same. The following embodiments are merely limited examples of the present invention, and the technical scope of the present invention is not limited thereto.

[0017] [First embodiment] 1 to 4 show a fabric according to a first embodiment. The fabric 1 of this embodiment is a horizontal double weave. The horizontal double weave constituting the fabric 1 of this embodiment is composed of a total of two types of wefts and one type of warp 11, and has a first design shown in FIG. 3 and a second design shown in FIG. 4. As shown in FIG. 2, the first design is composed of warp 11 and first weft 121 (weft 12), and the second design is composed of warp 11 and second weft 122 (weft 12). Note that the first design is composed of a unit, with the design diagram shown in FIG. 3 representing one unit, and each unit is continuous in the vertical and horizontal directions. Furthermore, the second design is composed of a unit, with the design diagram shown in FIG. 4 representing one unit, and each unit is continuous in the vertical and horizontal directions. The same applies to the design diagrams of the second and subsequent embodiments described below.

[0018] The first weave constitutes the front surface of the fabric and is used to be the outside of the garment when sewing the garment, while the second weave constitutes the back surface of the fabric and is used to be the inside of the garment when sewing the garment.

[0019] In the fabric 1 of this embodiment, ordinary yarn is used as the warp yarn, hollow moisture-absorbing and heat-generating yarn is used as the first weft yarn 121, and polyester multifilament yarn containing heat storage material is used as the second weft yarn 122.

[0020] The plain yarn is the most exposed on the other side of the fabric and determines the appearance of the fabric. The material and color of the plain yarn can be changed as appropriate depending on the design of the garment. As the plain yarn, yarn made of known materials such as nylon, polyester, rayon, cotton, and wool can be used. In the fabric 1 of this embodiment, cotton yarn dyed white with indigo dye was used as the plain yarn.

[0021] The heat storage material may be a ceramic that absorbs and radiates infrared rays. Examples of the ceramic include aluminum oxide, magnesium oxide, titanium dioxide, silicon dioxide, or metal oxides such as zirconia, tungsten oxide, or cesium oxide. One or more of the metal oxides may be mixed and used. The ceramic may be powdered and kneaded into the polyester fiber, or may be attached to the surface. Heat storage materials are suitable because they do not cause unnatural changes to the appearance of the fabric.

[0022] The hollow hygroscopic heat-generating yarn may be any yarn that is partially hollow and is composed of hygroscopic heat-generating fibers. For example, a yarn having a hollow core and hygroscopic heat-generating fibers in the sheath can be suitably used. Known hollow hygroscopic heat-generating yarns can be used. For example, a cotton yarn is known in which PVA is arranged in the core and cotton fibers are arranged in the sheath, and the PVA is melted with an alkaline agent to create a hollow shape. This cotton yarn may be used, or hollow cotton yarns manufactured by other methods may be used. Examples of the hygroscopic heat-generating fibers include cotton, rayon, cupra, and other cellulose-based fibers. In the fabric 1 of this embodiment, hollow cotton yarns were used as the hollow hygroscopic heat-generating yarns.

[0023] The hollow hygroscopic heat-generating yarn is hollow and contains a large amount of air, so it has excellent heat insulating properties. Furthermore, the yarn generates heat by absorbing moisture, which also enhances heat retention. It is preferable to configure the yarn so that the proportion of the yarn exposed on the front or back surface of the fabric is small or zero, and it is preferable to configure the yarn so that it has limited or no effect on the appearance of the fabric or the raised layer.

[0024] Polyester multifilament yarn is woven into fabric, and then rubbed to raise the polyester filaments that make up the yarn. When raised, the fine polyester fibers have a pleasant feel and a glossy finish, and they dry quickly and are not sticky even when exposed to the wearer's sweat, making them suitable as a raised material. The greater the number of filaments in the multifilament yarn, the greater the raised density, resulting in a better texture to the touch and appearance, and improved heat retention. The number of filaments is preferably, for example, 450 to 680.

[0025] The length of the raised nap is not particularly limited, but is preferably 0.5 to 4.5 mm, which prevents the garment from feeling too thick when worn and improves heat retention.

[0026] The fabric of this embodiment has 576 filaments and a raised length of 4.0 mm.

[0027] In the fabric 1 of this embodiment, the first design made up of warp yarns 11 and first weft yarns 121 is a 2 / 1 twill weave as shown in Fig. 3. The second design made up of warp yarns 11 and second weft yarns 122 is a 12-ply satin weave with a stitch count of 5 as shown in Fig. 4.

[0028] In the weave diagrams such as Figure 3, the warp yarns exposed on the front side of the fabric are shown in gray, and the weft yarns exposed on the front side of the fabric are shown in white. The warp or weft yarns exposed on the back side of the fabric are shown in the state where the gray and white areas in the weave diagram on the front side are interchanged.

[0029] As shown in Figure 3, more warp yarns 11 are exposed on the front side of the first weft yarn 111 than the first weft yarn 111. In the case of fabric 1 of this embodiment, the exposure rate of plain yarns calculated using the following formula is 66.6%. In fabric 1 of this embodiment, more warp yarns 11 are exposed on one side of the double weave, which is the front side of the fabric, than the first weft yarn 111, which exhibits functionality. Since the warp yarns 11 are dyed with indigo dye and the first weft yarn is a twill weave, the appearance of fabric 1 is similar to that of denim fabric. Exposure rate of normal thread (%) = A1 ÷ B1 × 100 Here, A1 is the number of squares in which plain yarn is exposed on the front side of the fabric in the first structure in the structure diagram of Figure 3, and B1 is the total number of squares in the first structure in the structure diagram of Figure 3. Numbers after the first decimal point are rounded down. The plain yarn exposure rate was also determined in the same way for fabrics according to other embodiments described below.

[0030] As shown in FIG. 4, more of the second weft yarn 122 is exposed on the back side of the second weft structure than the warp yarn 11. In the case of fabric 1 of this embodiment, the exposure rate of the second weft yarn calculated using the following formula is 91.6%. In fabric 1 of this embodiment, more of the second weft yarn 122 is exposed on one side of the double weave structure, which is the back side of the fabric, than the warp yarn 11, which determines the appearance of the fabric. The second weft yarn 122 is a polyester multifilament yarn, and as described above, is brushed after weaving. As a result, a dense brushed layer is formed on the back side of the fabric. Exposure rate of polyester multifilament yarn (%) = A2 ÷ B2 × 100 Here, A2 is the number of squares in which polyester multifilament yarn is exposed on the back side of the fabric on the back side of the second structure in the structure diagram of Fig. 4, and B2 is the number of all squares in the structure diagram of Fig. 4. Numbers after the first decimal place are rounded down. Note that the exposure rate of polyester multifilament yarn containing a heat storage material was determined in the same manner for fabrics according to other embodiments described below.

[0031] In fabric 1, polyester multifilament yarn is most exposed on one side, which is the back side of the fabric, and plain yarn is most exposed on the other side, which is the front side of the fabric. When sewing fabric 1, one side of the fabric is placed against the wearer's skin, and the other side of the fabric is placed on the outside of the garment. This reduces the impact of functional yarns, i.e., moisture-absorbing and heat-generating yarns or polyester multifilament yarns, on the garment's appearance, and provides a warm garment with a brushed layer placed against the wearer's skin. In this embodiment, denim pants were sewn using fabric 1. In fabric 1, hollow moisture-absorbing and heat-generating yarns generate heat using moisture emitted from the wearer's body surface. In fabric 1, heat generated by moisture absorption and heat generation, heat from sunlight irradiating the fabric, and heat from the wearer's body temperature are stored in a heat storage material. The heat storage material warms the wearer's body through radiant heat. In fabric 1, the brushed layer and hollow moisture-absorbing and heat-generating yarns suppress heat dissipation. Additionally, the double weave of Fabric 1 allows the fabric to easily trap air, which also prevents heat from escaping. Fabric 1 exhibits high heat retention due to the above-mentioned effects. The brushed layer is dense and shiny, with a powder-like texture. Since regular yarns are mainly exposed on the outside of the garment, the appearance of the garment can be made comparable to that of regular denim pants.

[0032] [Second embodiment] Fabric 1b according to the second embodiment is shown in Figures 5 to 8. Fabric 1b according to this embodiment is constructed with a horizontal double weave, similar to fabric 1 according to the first embodiment. It is similar to fabric 1a according to the first embodiment in that plain yarn is used for warp yarn 11b, polyester multifilament yarn containing a heat storage material is used for first weft yarn 121b (12b), and hollow cotton yarn is used for second weft yarn 122b (12b). In fabric 1b, the plain yarn is cotton yarn dyed neutral white with indigo dye. The number of filaments in the polyester multifilament yarn containing a heat storage material is 650.

[0033] In the fabric 1b of this embodiment, the first weave is a 5-ply satin weave with a stitch count of 4 as shown in Fig. 7, and the second weave is a 10-ply satin weave with a stitch count of 4 as shown in Fig. 8. The exposure rate of the plain yarn on the front surface of the first weave, determined in the same manner as above, is 80%, and the exposure rate of the polyester multifilament yarn containing the heat storage material on the back surface of the second weave, determined in the same manner as above, is 90%.

[0034] In the second embodiment, denim pants were sewn using fabric 1b. The side of fabric 1b with the most exposed brushed yarn was placed against the wearer's skin, and the side of fabric 1b with the most exposed plain yarn was placed on the outside of the garment. Fabric 1b exhibits high heat retention due to the same effect as fabric 1 in the first embodiment. The brushed layer of fabric 1b is glossy and dense, and has a powdery texture. Because the plain yarn is mainly exposed on the outside of the garment, the appearance of the garment can be made to be comparable to that of ordinary denim pants.

[0035] [Third embodiment] Fabric 1c according to the third embodiment is shown in Figures 9 to 12. Fabric 1c of this embodiment is constructed with a warp double weave. Plain yarn is used for the weft yarn 12c, hollow cotton yarn is used for the first warp yarn 111c (11c), and polyester multifilament yarn containing a heat storage material is used for the second warp yarn 112c (11c). The plain yarn is polyester multifilament yarn dyed with black dye.

[0036] As shown in Figure 11, the first design of fabric 1c is composed of hollow cotton yarns as first warp threads 111c and plain yarns as weft threads 12c, and is a 1 / 2 twill weave. As shown in Figure 12, the second design is composed of polyester multifilament yarns as second warp threads 121c and plain yarns as weft threads 12c, and is a 12-ply satin weave with a stitch count of 5. The exposure rate of plain yarns on the front surface of the first design, calculated in the same manner as above, is 66.6%, and the exposure rate of polyester multifilament yarns containing heat storage material on the back surface of the second design, calculated in the same manner as above, is 91.6%.

[0037] The second warp yarn 121c, which is a polyester multifilament yarn containing a heat storage material, is exposed in the most exposed area on the back surface of the second weave. The multifilament yarn is brushed to form a brushed layer. The first weave yarn, which is a plain weft yarn, is exposed in the most exposed area on the front surface of the first weave, and forms the outer appearance of the fabric.

[0038] In the third embodiment, a black shirt was sewn using fabric 1b. The side of fabric 1c with the most exposed brushed yarn was placed against the wearer's skin, and the side of fabric 1c with the most exposed plain yarn was placed on the outside of the garment. Fabric 1c exhibits high heat retention due to the same effect as fabric 1 in the first embodiment. The brushed layer of fabric 1b is glossy and dense, and has a powdery texture. Because the plain yarn is mainly exposed on the outside of the garment, the appearance of the garment can be made to be comparable to that of a regular shirt.

[0039] [Fourth embodiment] A fabric 1d of the fourth embodiment is shown in Figures 13 to 16. The fabric 1d of this embodiment is constructed with a warp and weft double weave. As shown in Figures 14 and 15, the first design is a 2 / 1 twill weave composed of a first warp 111d (11d) and a first weft 121d (12d). As shown in Figures 14 and 16, the second design is a 5-lead 8-ply satin weave composed of a second warp 112d (11d) and a second weft 122d (12d). The first and second designs are joined together at the locations marked with double circles in Figure 13 by passing the first weft under the second warp or passing the second weft over the first warp, thereby connecting the first and second designs. The first and second designs may be bound together by a binding yarn that is not one of the first warp, first weft, second warp, and second weft. In Fig. 14, the numbers 1 to 4 assigned to the first weft 121d and the second weft 122d are weft numbers and correspond to the weft numbers in Figs. 13, 15, and 16. The numbers 1 to 24 shown in the horizontal direction correspond to the warp numbers in Figs. 13, 15, and 16.

[0040] The first warp yarn was a plain cotton yarn dyed with a green dye, and the first weft yarn was an uncolored hollow cotton yarn. The second warp yarn and second weft yarn were polyester multifilament yarns containing a heat storage material. The number of filaments was 450. The exposure rate of the plain yarn on the front surface of the first weave, determined in the same manner as above, was 66.6%, excluding the bonding points, and the exposure rate of the polyester multifilament yarn containing a heat storage material on the back surface of the second weave, determined in the same manner as above, was 100%, excluding the bonding points.

[0041] In the fourth embodiment, green pants were sewn using fabric 1d. The side of fabric 1d with the most exposed brushed yarn was placed closest to the wearer's skin, while the side of fabric 1cd with the most exposed plain yarn was placed on the outside of the garment. Fabric 1d exhibits high heat retention due to the same effect as fabric 1 in the first embodiment. The brushed layer of fabric 1d is glossy and dense, with a powdery texture. Because the plain yarn is mainly exposed on the outside of the garment, the appearance of the garment can be made comparable to that of ordinary pants.

[0042] [Fifth embodiment] The fabric of the fifth embodiment is constructed with a warp and weft double weave, similar to the fabric of the fourth embodiment. In the fabric of the fifth embodiment, the first weave is a plain weave composed of first warp threads and second warp threads. The second weave is a 12-leaf satin weave with a five-count composed of second warp threads and second weft threads. The fabric of the fifth embodiment differs from the fabric of the fourth embodiment only in that plain yarn is used for the first warp threads and first weft threads of the first weave, polyester multifilament yarn containing a heat storage material is used for the second weft thread of the second weave, and hollow cotton yarn is used for the second warp thread of the second weave. Furthermore, more of the second warp threads are exposed on the front side of the second weave than the second weft threads.

[0043] The exposure rate of the plain yarn on the surface of the first weave is 100%, excluding the bonding points, and the exposure rate of the polyester multifilament yarn containing the heat storage material on the back of the second weave is 91.6%, excluding the bonding points, and is brushed. The plain yarn is a polyester multifilament yarn dyed black.

[0044] In the fifth embodiment, a jacket was sewn using the above-described fabric. The side of the fabric with the most exposed nap was placed against the wearer's skin, and the side of the fabric with the most exposed plain yarn was placed on the outside of the garment. This fabric exhibits high heat retention due to the same effect as fabric 1 of the first embodiment. The fabric's napped layer is glossy and dense, and has a powdery texture. Because the plain yarn is mainly exposed on the outside of the garment, the appearance of the garment can be made comparable to that of a regular jacket.

[0045] [Sixth embodiment] The fabric of the fifth embodiment is a weft double weave fabric having the same weave as the first embodiment shown in Figures 1 to 4. That is, as shown in Figure 3, the first weave is composed of warp yarns 11 and first weft yarns 121, and is a 2 / 1 twill weave. The second weave is composed of warp yarns 11 and second weft yarns 122, and is a 12-ply satin weave with a 5-ply weave. The warp yarns are plain yarns, and both the first and second weft yarns are polyester multifilament yarns containing a heat storage material. The plain yarns are yellow-colored cotton yarns.

[0046] The exposure rate of the plain yarn on the surface of the first structure is 66.6%, excluding the bonding points, and the exposure rate of the polyester multifilament yarn containing the heat storage material on the back of the second structure is 91.6%, excluding the bonding points, and is brushed.

[0047] In the sixth embodiment, a yellow shirt was sewn using the above-described fabric. The side of the fabric with the most exposed nap was placed closest to the wearer's skin, and the side with the most exposed plain yarn was placed on the outside of the garment. Heat from the wearer's body temperature and from sunlight irradiating the fabric is stored in the heat storage material, which then emits radiant heat. The fabric exhibits high heat retention by preventing the wearer's body temperature from escaping due to the napped layer. The napped layer is dense and shiny, and has a powdery texture. Because the plain yarn is mainly exposed on the outside of the garment, the appearance of the garment can be made comparable to that of a regular shirt.

[0048] [Variations] The exposure rate of the polyester multifilament yarn exposed on one side of the fabric is not particularly limited, but can be 55% or more and 100% or less. The exposure rate of the plain yarn exposed on the other side of the fabric can be 55% or more and 100% or less.

[0049] The structure of the first or second weave is not particularly limited and can be selected from, for example, plain weave, twill weave, satin weave, etc. In the case of a double warp weave or double weft weave, it is preferable to adopt a weave such as twill weave or satin weave in which one of the warp and weft threads is exposed to a larger extent on one side of the fabric than the other of the warp and weft threads. Twill weaves include broken twill weave and chevron twill weave.

[0050] When a warp and weft double weave is used and hollow moisture-absorbing and heat-generating yarns are used, it is preferable to use a weave such as twill or satin for either the first or second weave, in which one of the warp and weft threads is exposed to a larger extent on one side of the fabric than the other of the warp and weft threads. The other of the first and second weaves can be constructed with any weave.

[0051] For example, in the fourth embodiment, the first weave may be a plain weave, with the first warp and second warp threads both being plain yarns, the second weave may be a twill or satin weave, with one of the second warp and second weft threads being a polyester multifilament yarn containing a heat storage material and the other being a hollow yarn having moisture absorption and heat generation properties, with the polyester multifilament yarn containing the heat storage material being most exposed on the back surface of the second weave.

[0052] In a warp double weave, the first and second weaves use a common weft. In a weft double weave, the first and second weaves use a common weft. Weaves that use a common warp or weft can reduce the thickness of the fabric compared to a warp and weft double weave, making them preferable in terms of comfort.

[0053] In the fabrics of the above embodiments, the polyester multifilament yarn may be an elastic yarn. For example, it may be a covered yarn made by winding a polyester multifilament yarn around a polyurethane yarn. This makes it possible to impart stretchability to the fabric and to clothing made using the fabric.

[0054] The heat storage material may be attached to the surface of the fiber or kneaded into the polyester material that makes up the fiber. Kneading the heat storage material is preferable because it makes it less likely to fall off. The amount of heat storage material to be blended is not particularly limited, but it is preferably 0.1 to 10 mass% per 100 parts by mass of the yarn.

[0055] The garments sewn using the fabrics of the embodiments are not particularly limited, and examples thereof include tops, bottoms, and coveralls. [Example]

[0056] The heat retention of the fabric according to the first embodiment and the fabric according to the comparative example 1 shown below was evaluated by the dry contact method.

[0057] The structure of the fabric according to the first embodiment is as described above, and therefore a detailed description will be omitted. Note that the fabric according to the first embodiment contains a heat storage material equivalent to 3% of the mass of the polyester multifilament yarn.

[0058] The fabric of Comparative Example 1 is a two-layer fabric made by bonding together a twill denim fabric with a cotton weft and a neutral-white cotton warp dyed with indigo dye, and a lining with adhesive. The lining is a woven fabric with a raised nap, using warp and weft threads made of polyester multifilament yarn wound around polyurethane yarn. The raised length is 1.3 mm.

[0059] The dry contact method is a method for evaluating the thermal insulation properties of clothing when the skin is in direct contact with the skin in a dry state. The procedure is as follows: 1. Take a test piece of 20cm x 20cm (n=2). 2. The measuring device used was THERMO LABO II (manufactured by Kato Tech Co., Ltd.). 3. The temperature of the device's constant temperature heating element was set to 30°C, the ambient temperature was set to 20°C, and the temperature difference between the ambient temperature and the high-temperature heating element was set to 10°C. The air flow on the fabric surface was set to 30cm / s. 4. Attach the test piece to a constant temperature heating element, calculate the total heat loss for 60 seconds, and calculate the average value (b). 5. Without attaching the test piece to the constant temperature heating element, calculate the total heat loss for 60 seconds under the same conditions as above and calculate the average value (a). 6. Calculate the heat retention rate using the following formula. Heat retention rate (%)=(1-b / a)×100 a: Total heat loss measured without attaching a test piece to the constant temperature heating element (W / cm 2 ) b: Total heat loss measured with the test piece attached to the constant temperature heating element (W / cm 2 )

[0060] The heat retention rate of the fabric according to Example 1, determined by the dry contact method, was 33.7%. The heat retention rate of the fabric according to Comparative Example 1, determined by the dry contact method, was 18.6%. It was shown that the fabric according to Example 1 has a heat retention rate that is approximately 1.8 times higher than that of the fabric according to Comparative Example 1.

[0061] When denim pants were sewn using the fabric of Example 1, the appearance was comparable to that of regular denim pants. When the denim pants were worn, they had significantly higher heat retention than regular denim pants. The brushed layer on the inside of the denim pants had a luxurious velvet-like appearance and was pleasant to the touch.

Claims

1. It is a fabric made of double weave, The yarns constituting the double weave include ordinary yarns and polyester multifilament yarns containing a heat storage material, the heat storage material is a powder of at least one ceramic material that absorbs and radiates infrared rays and is selected from aluminum oxide, magnesium oxide, titanium dioxide, silicon dioxide, zirconia, tungsten oxide, and cesium oxide; The ordinary yarn does not contain the heat storage material, On one side of the double weave, the polyester multifilament yarn containing the heat storage material is most exposed, On the other side of the double weave, the plain yarn is most exposed, The thermal insulation fabric for clothing has a double weave structure in which polyester multifilament yarns exposed on one side are in a raised state.

2. 2. The thermal fabric for clothing according to claim 1, wherein the yarns constituting the double weave structure further include hollow yarns having moisture-absorbing and heat-generating properties.

3. 3. The thermal fabric for clothing according to claim 1, wherein the fabric is a warp double weave, a weft double weave, or a warp and weft double weave.

4. A garment comprising the thermal fabric for clothing according to any one of claims 1 to 3 as a constituent material, One side of the double-weave fabric, on which the brushed polyester multifilament yarn is most exposed, faces the wearer's skin, A garment in which the other side of the double weave, where the ordinary yarn is most exposed, is the outside of the garment.

5. The fabric is made of a horizontal double weave, the warp yarn is a normal yarn, and the normal yarn is a yarn dyed with indigo dye, The first weft yarn arranged on the front side of the fabric is a white hollow cotton yarn, The second weft yarn arranged on the back side of the fabric is a polyester multifilament yarn containing the heat storage material, 5. The garment according to claim 4, wherein the fabric has a twill weave on the front side.

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