JPH10292246A - Heat-conductive fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject fabric that is constituted with specific metallic wire and thermoplastic synthetic fiber, stetting the degree of surface exposure of the metallic wire to more tan a specific value, thus has high heat conductivity, soft fabric hand, and is useful as an excellent heat-insulating fabric material. SOLUTION: This heat-conductive fabric comprises metallic fine wire with thermal conductivity of 0.3-1.0 cal/cm. sec. deg.C, preferably anti-oxidation treated with wire diameter of 30-150 μm and having specific directionality on the fabric surface and thermoplastic synthetic fiber of polyester continuous filament yarns in which the surface exposure degree of the metallic wire is >=30% on one surface of the fabric. In this fabric the metabolizing or other post-treatment process becomes unnecessary and good heat insulating performance is well attained even in the shade.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermally conductive fabric having a high thermal conductivity and a soft feel.

[0002]

2. Description of the Related Art Conventionally, in winter clothing and winter sports clothing, an air layer (dead air) of a batting is used due to a three-layer structure in which a batting is inserted between a surface material and a lining having moisture permeability and waterproofness. There is known one that obtains heat retention. However, such a three-layered fabric is particularly effective as a winter sports garment that is required to be easy to move, in a field in which free movement is hindered by bulk and a high degree of heat retention is required. Had small defects.

In recent years, a heat-retaining fabric which reflects body heat by using a fabric on which a metal such as aluminum, stainless steel, titanium or the like is deposited as a backing (Japanese Patent Laid-Open No. 59-1567).
No. 43), and a heat-retaining fiber that absorbs sunlight energy by incorporating a transition metal carbide typified by zirconium carbide into the fiber, converts the absorbed light energy into heat energy, and radiates it (Japanese Patent Publication No. Hei 2- No. 9202) are proposed, and the use of these heat-retaining fabrics reduces the amount of batting used or prevents them from being used at all, thereby preventing free movement due to the bulkiness described above, The disadvantage of not being able to obtain a great heat retaining effect has been solved.

[0004] However, the above-mentioned cloth on which metal such as aluminum, stainless steel, titanium or the like is vapor-deposited increases the cost associated with the vapor-deposition processing, causes uneven deposition due to delicate handling of the cloth in a preparatory step before the vapor-deposition processing, and causes washing or wearing. There have been various problems such as a decrease in the heat retaining performance due to the falling off of the deposited metal due to friction at the time.

[0005] In addition, a heat-retaining fabric in which a transition metal carbide represented by zirconium carbide is contained in a fiber exhibits a sufficient heat-retaining property under irradiation of sunlight, but does not exhibit heat retention under non-irradiation or in shade. There was a problem that sufficient heat retention could not be obtained.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above circumstances, and can exhibit good heat retention even in the shade without performing post-processing such as vapor deposition. An object is to obtain a heat conductive cloth that can be used as a material.

[0007]

The present invention achieves the above object and has the following constitution. That is, the present invention has a thermal conductivity of 0.3 to 1.0 cal / cm.
A heat conductive cloth comprising a metal thin wire made of a metal having a temperature of sec / ° C. and a thermoplastic synthetic fiber, wherein the surface exposure of the metal thin wire on one surface of the cloth is 30% or more. Things. Further, the present invention provides a thermally conductive fabric in which the fine metal wire has a specific direction on the fabric surface. Further, the present invention provides a thermally conductive fabric in which a thin metal wire is subjected to an antioxidant treatment. Further, the present invention provides a thermally conductive fabric in which the thermoplastic synthetic fiber is a polyester filament yarn.
Further, the present invention provides a heat conductive cloth in which the cloth has a woven structure. Further, the present invention has a gist of a heat conductive cloth in which the wire diameter of the fine metal wire is in a range of 30 to 150 μm.

Hereinafter, the present invention will be described in detail. Although the heat conductive cloth of the present invention cannot exhibit a high degree of heat retention by itself, the heat generated from the heat source by grounding a heat source such as a heating element to the heat conductive cloth by the heat conductive cloth. It is a material that can be used to efficiently communicate and actively keep the entire clothing warm.

In order to achieve the above object, the present invention provides a fabric comprising a metal thin wire having a thermal conductivity of 0.3 to 1.0 cal / cm · sec · ° C. and a thermoplastic synthetic fiber. Used.

The thermal conductivity referred to here refers not to the performance of a thin metal wire but to the performance of a single metal. For the measuring method, see “Toyomatsu Aoki, Kinzoku, Vo1.66, No. 9, p. 33. ~ 37
(1996)].

In the present invention, the thermal conductivity is 0.3 to 1.0 ca.
It is necessary to use a thin metal wire made of a metal of l / cm · sec · ° C. Thermal conductivity is 0.3 cal / cm-sec.
When the temperature is lower than 0 ° C, the heat conduction performance aimed at by the present invention cannot be obtained, which is not preferable. The thermal conductivity is 1.0 cal / cm.
When the temperature exceeds sec · ° C., not only does the heat conduction performance aimed at by the present invention reach saturation, but also the cost of the thin metal wire as a material increases, and it is difficult to industrialize economically.
As those satisfying the above thermal conductivity, for example, copper,
Examples thereof include thin metal wires made of silver, gold, aluminum, and stainless steel. In the present invention, the above fine metal wire may be used as it is, but when a cloth using these fine metal wires is used as a garment, there is also a material that generates rust due to sweat or the like when worn, in which case the fine metal wire is used. It is preferable to use one that has been subjected to an antioxidant treatment. As such an example, for example, a thin copper wire having a surface plated with tin or gold can be cited.

In the present invention, the diameter of the thin metal wire used is 30 to 150 μm. When the wire diameter of the thin metal wire is smaller than 30 μm, the cost of the thin metal wire becomes high, and it is difficult to industrially economically make the metal wire. Yarn breakage occurs frequently, and the processability deteriorates. When the wire diameter of the thin metal wire exceeds 150 μm, the texture of the obtained fabric becomes hard and the basis weight becomes heavy, which is not suitable for use in clothing. Therefore, when the wire diameter of the thin metal wire is 30 to 150 μm, the obtained fabric is soft and lightweight, so that it is suitable for use in clothing. The number of the thin metal wires may be one, or a plurality of the wires may be used as one thread.

The thermoplastic synthetic fibers used in the present invention include polyamide synthetic fibers represented by nylon 6 and nylon 66, and polyester synthetic fibers represented by polyethylene terephthalate, polybutylene terephthalate and polyethylene naphthalate. And polyolefin-based synthetic fibers represented by polyethylene and polypropylene, or synthetic fibers composed of a copolymer containing the same as a main component.

The heat conductive cloth of the present invention is a cloth comprising the above-mentioned thin metal wire and synthetic fiber. As described above, the heat generating element is grounded to the heat conductive cloth to transfer the heat of the heat generating element through the heat conductive cloth. Although it can be used as a material that can be transmitted to a wide range, in consideration of the temperature and use time of the heating element used at that time, particularly the polyester synthetic fiber among the thermoplastic synthetic fibers described above, and more preferably, polyester long fiber is preferably used. .

The fabric of the present invention refers to a woven or knitted fabric comprising the above-described fine metal wires and thermoplastic synthetic fibers. In the case of a woven fabric, a fine metal wire may be used as either a warp or a weft, but it is preferable to use a fine metal wire as a weft in view of the low elongation and the processability. In the case of knitting,
When a loop is formed by a thin metal wire, the thin metal wire is frequently broken by bending. Therefore, a method of inserting a thin metal wire into a knitted fabric by a known inlay method is preferable.

In the present invention, the degree of surface exposure of the fine metal wire on one surface of the cloth must be 30% or more. The surface exposure degree of the fine metal wire referred to in the present invention is calculated by measuring the area of the fine metal wire and the cloth from a photograph of the cloth surface of the present invention taken at a magnification of 20 times using an optical microscope. In order to make the surface exposure degree of the fine metal wire on one surface of the heat conductive cloth of the present invention 30% or more, the cloth may be designed in consideration of the structure and the thickness of the fiber used. For example, in the case of a woven fabric, it is desirable to use a thin metal wire having a satin structure such as 5-sheet satin as the weft, but a flat structure or a twill structure may be designed in consideration of the relationship with the thickness of the fiber used together. In the case of a woven fabric, a thin metal wire is used as the inlay yarn, and the knitting needle of the front yarn is pulled out so that the inlay portion comes out on the surface of the knitted fabric. What is necessary is just to design so that it may reach 30% on the ground surface. Therefore, when the surface exposure degree is smaller than 30%, and when the heat source such as the above-mentioned heating element is grounded to the heat conductive cloth, the heat conductivity from the heat source becomes small and the heat retaining effect aimed at by the present invention cannot be obtained. Therefore, it is not preferable. Further, it is preferable that the thin metal wire used in the present invention has a specific directionality such as a weft direction, a warp direction, or a bias direction on the fabric surface. If the thin metal wire does not have a specific directionality on the surface of the cloth, the heat from the heat source is conducted in various directions, so that the desired heat retaining effect of the present invention may not be obtained.

[0017]

As a method of increasing the thermal conductivity of a fabric,
A method has been proposed in which metal powders such as copper and aluminum are contained in thermoplastic synthetic fibers. However, while the thermal conductivity of the metal powder is 0.3 cal / cm · sec · ° C. or more, the thermal conductivity of the thermoplastic synthetic fiber is 5 × 10 ⁻⁴ c
al / cm · sec · ° C., it is theoretically possible to impart high thermal conductivity to the fiber if the metal powder having high thermal conductivity can be continuously contained at a high content. However, this method is not a practical method due to problems such as a decrease in yarn formability and fiber properties during fiber production.

On the other hand, the heat conductive fabric of the present invention comprises a metal thin wire having a heat conductivity of 0.3 to 1.0 cal / cm · sec · ° C. and a thermoplastic synthetic fiber, and When the degree of surface exposure of the fine metal wire on one surface of the fabric is 30% or more, the high heat conduction performance inherent in the fine metal wire is not reduced, and the fiber physical properties as described above are not reduced. Thermal conductivity can be imparted to the fabric. Further, by using a thin metal wire, excellent flexibility and light weight can be imparted as compared with a metal plate such as an aluminum plate or a copper plate. In addition, since the thin metal wire has a specific direction on the cloth surface, heat from the heat source can be efficiently conducted in a certain direction, and a high heat retaining effect can be obtained. In addition, by performing the antioxidant treatment on the thin metal wire, when the fabric of the present invention is used as clothing, rust due to sweat or the like due to wearing is eliminated. Further, since the thermoplastic synthetic fiber is a polyester filament yarn, when a synthetic fiber other than polyester is used, when the heat source is grounded to the cloth of the present invention, the temperature of the heat source and the time for supplying heat are changed depending on the temperature of the heat source. Although shrinkage and curing may occur, such a phenomenon is unlikely to occur in the case of polyester. Further, when the heat source is grounded to the fabric of the present invention, the fabric can have a smaller unevenness than the knitted fabric, so that the heat can be efficiently transmitted. Furthermore, by defining the wire diameter of the thin metal wire to be 30 to 150 μm, it is possible to improve the softness of the fabric and to improve the processability.

[0019]

Next, the present invention will be described more specifically with reference to embodiments. The measurement and evaluation of the performance in the embodiment were performed by the following methods. (1) Thermal conductivity In a constant temperature and humidity room at a temperature of 20 ° C and a humidity of 65%, Fig. 1
As shown in the figure, a sample 2 was placed on a polyurethane sheet 1 having a thickness of 10 mm.
C., a column-shaped cartridge heater 3 was placed, and a thermocouple 4 was placed on the sample 2 at an interval of 50 mm from the cartridge heater 3.
, And a 10 mm-thick polyurethane sheet 5 was placed on the sample 2. The temperature of each thermocouple was measured 15 minutes after the start of the measurement, and the thermal conductivity was evaluated.

Embodiment 1 A 150d / 48f polyester filament as a warp and a thermal conductivity of 0.72 cal / cm · sec as a weft.
Using a tin-plated copper wire (a thin metal wire subjected to antioxidation treatment) having a diameter of 80 μm at c · ° C., a 5-layer satin woven fabric having a warp density of 140 yarns / inch and a weft yarn density of 95 yarns / inch was heated by a rapier weaving machine. A conductive fabric was manufactured. At this time, the degree of surface exposure of the fine metal wires on the surface of the obtained woven fabric was 80%.

For comparison with the present invention, the following Comparative Examples 1 to 3
As a result, three comparative fabrics were produced. Comparative Example 1 In the first embodiment, the heat conductivity used as the weft is 0.5.
A thermal conductivity for comparison was obtained in exactly the same manner as in the first embodiment, except that an iron wire having a thermal conductivity of 0.18 cal / cm · sec · ° C. was used instead of the tin-plated copper wire of 72 cal / cm · sec · ° C. A fabric was obtained.

COMPARATIVE EXAMPLE 2 In the first embodiment, the heat conductivity used as the weft is 0.5.
Thermal conductivity of 3.6 × 10 ⁻⁴ cal / cm · sec · ° C. instead of tinned copper wire of 72 cal / cm · sec · ° C.
A woven fabric for comparison was obtained in exactly the same manner as in Embodiment 1, except that a 75d / 36f polyester filament was used.

Comparative Example 3 Comparative Example 3 was carried out in exactly the same manner as in Example 1 except that the surface of the obtained fabric was used as the back surface (the degree of surface exposure of the fine metal wires on the surface of the fabric was 20%). A thermally conductive fabric was obtained.

The performances of the present invention and the comparative woven fabric obtained as described above were measured, and the results are shown in Table 1.

[0025]

[Table 1]

As is evident from Table 1, the thermally conductive fabric of the present invention has better thermal conductivity than Comparative Examples 1 to 3.

[0027]

As described above, the heat conductive cloth of the present invention has a high thermal conductivity and a soft touch, and a heat source such as a heating element is grounded to the heat conductive cloth. By doing so, the heat generated from the heat source can be efficiently transmitted to the heat conductive cloth, and exhibits an excellent effect as a heat insulating material for clothing. Further, the heat conductive fabric of the present invention,
It can exhibit good heat retention even in the shade without performing post-processing such as vapor deposition processing.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an apparatus for evaluating the thermal conductivity of a thermally conductive fabric according to the present invention.

[Explanation of symbols]

 1 polyurethane sheet 2 sample 3 cartridge heater 4 thermocouple 5 polyurethane sheet

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Mitsuke Nakamoto 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Yoko Michiyuki 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (6)

[Claims] 1. A thermal conductivity of 0.3 to 1.0 cal / cm.
A heat conductivity, comprising a metal thin wire made of a metal having a temperature of sec · ° C. and a thermoplastic synthetic fiber, wherein the surface exposure of the metal thin wire on one surface of the cloth is 30% or more. Fabric. 2. The thermally conductive fabric according to claim 1, wherein the thin metal wire has a specific direction on the fabric surface. 3. The heat conductive fabric according to claim 1, wherein the metal fine wire is subjected to an antioxidant treatment. 4. The thermoplastic synthetic fiber is a polyester filament yarn.
The thermally conductive fabric as described. 5. The heat conductive cloth according to claim 1, wherein the cloth has a woven structure. 6. The heat conductive cloth according to claim 1, wherein the diameter of the thin metal wire is in the range of 30 to 150 μm.