Heat insulating sheet for outdoors

Abstract

To provide a heat insulating sheet for outdoors which can suppress influence of radiation heat by sunlight.SOLUTION: A heat insulating sheet 1A for outdoors includes inside and outside, and includes a first resin layer 11, a second resin layer 12, and a first reinforcement cloth 13, wherein the first resin layer 11 is arranged on the outermost side, the second resin layer 12 is arrange inside the first resin layer 11, the first reinforcement cloth 13 is arranged inside the second resin layer 12, and an infrared reflection agent is kneaded in the first resin layer 11. As a result, temperature rise can be suppressed inside the heat insulating sheet 1A for outdoors.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to an outdoor heat-insulating sheet.

Background Art

[0002] For example, a technique related to a protective material for protecting the human body from toxic gases, liquids, etc. is disclosed in Japanese Patent No. 5784812 (Patent Document 1). Such a protective material is required to have good gas permeability resistance and liquid-proof protection properties on the surface of the material, and techniques related to the surface treatment of the material are disclosed in, for example, Japanese Unexamined Patent Application Publication No. 2003-2903 (Patent Document 2) and Japanese Unexamined Patent Application Publication No. 2010-24279 (Patent Document 3).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] Since the protective clothing using the protective material covers the whole body, when used outdoors, due to the influence of radiant heat from solar radiation, the inside of the protective clothing becomes high temperature. Therefore, it is difficult to wear the protective clothing for a long time, and as a result, the working efficiency of the work performed while wearing the protective clothing decreases.

[0005] Not limited to protective clothing, when working outdoors, it is important to consider the influence of radiant heat from solar radiation.

[0006] An object of the present disclosure is to solve the above problems and provide an outdoor heat-insulating sheet capable of suppressing the influence of radiant heat from solar radiation. [Means for Solving the Problems]

[0007] [1] In the outdoor heat-insulating sheet of the present disclosure, a protective material having an inner side and an outer side includes a first resin layer, a second resin layer, and a first reinforcing cloth. The first resin layer is disposed on the outermost side, and the second resin layer and the first reinforcing cloth are disposed inside the first resin layer. The first resin layer has an infrared reflecting agent kneaded therein.

[0008] [2] The outdoor heat-insulating sheet according to [1], wherein the second resin layer is disposed inside the first resin layer, and the first reinforcing cloth is disposed inside the second resin layer.

[0009] [3] The outdoor heat-insulating sheet according to [2], wherein a second reinforcing cloth is further disposed between the first resin layer and the second resin layer.

[0010] [4] The outdoor heat-insulating sheet according to any one of [1] to [3], wherein the first resin layer is chlorinated polyethylene and the infrared reflecting agent is a metal oxide.

[0011] [5] The outdoor heat-insulating sheet according to any one of [1] to [4], wherein the outdoor heat-insulating sheet is used for any one of outdoor utensils, awning materials, tent materials, tarps, umbrellas, wrapping materials, bodies of automobiles, building materials, clothing, sports, and outdoor supplies. [Advantages of the Invention]

[0012] According to the present disclosure, it is possible to provide an outdoor heat-insulating sheet capable of suppressing the influence of radiant heat caused by solar radiation. [Brief Description of the Drawings]

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0014] Regarding the outdoor heat insulation sheets of each embodiment based on the present disclosure, they will be described below with reference to the drawings. In the embodiments described below, when referring to the number, amount, etc., unless otherwise specified, the scope of the present invention is not necessarily limited to the number, amount, etc. The same parts and corresponding parts are given the same reference numerals, and duplicate explanations may not be repeated. It is initially planned to use the configurations in the embodiments in appropriate combinations. For ease of understanding, the film thickness and layer thickness shown in the figures are described differently from the actual ratios.

[0015] In the specification, "outer side" means the side exposed to liquids, etc. when the outdoor heat insulation sheet is in use, and "inner side" means the side not exposed to liquids, etc. when the outdoor heat insulation sheet is in use.

[0016] [Embodiment 1: Outdoor heat insulation sheet 1A] Referring to FIG. 1, the outdoor heat insulation sheet 1A of this embodiment will be described. FIG. 1 is a cross-sectional structure diagram of the outdoor heat insulation sheet A.

[0017] The outdoor heat insulation sheet 1A of this embodiment includes a first resin layer 11, a second resin layer 12, and a first reinforcing cloth 13. The first resin layer 11 is arranged on the outermost side, the second resin layer 12 is arranged inside the first resin layer 11, and the first reinforcing cloth 13 is arranged inside the second resin layer 12.

[0018] The thickness of the first resin layer 11 is about 0.10 mm to 0.30 mm, the thickness of the second resin layer 12 is about 12 μm, and the thickness of the first reinforcing cloth 13 is about 0.06 mm to 0.40 mm. The total thickness of the outdoor heat insulation sheet 1A is about 0.15 mm to 0.75 mm.

[0019] In this embodiment, chlorinated polyethylene is used as a material rich in flexibility for the first resin layer 11. As materials other than chlorinated polyethylene, polyvinyl chloride, polyurethane, polyvinylidene chloride, polyvinyl acetate, polystyrene, polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-vinyl chloride-vinyl acetate copolymer, acrylonitrile-butadiene-styrene resin, etc. are used. Furthermore, an infrared reflecting agent is kneaded into the chlorinated polyethylene.

[0020] The infrared reflecting agent means a material capable of reflecting light in the near-infrared region (780 nm to 2500 nm) contained in natural light. For example, metal oxides (Fe2O3, Mn3O4, Cr2O3, CoO, CuO), etc. are used as the infrared reflecting agent. In this embodiment, the content of the infrared reflecting agent contained in the first resin layer 11 is about 0.5% to 20%.

[0021] A PET film is used for the second resin layer 12. A nylon fabric with a yarn thickness of 70 decitex is used for the first reinforcing cloth 13. The yarn thickness is not limited to this thickness. Also, the material is not limited to nylon. For example, polyester, cotton, etc. can also be used. Also, in addition to woven fabrics, knits, thin fabrics, non-woven fabrics, etc. can also be used.

[0022] In the outdoor heat insulation sheet 1A of this embodiment, an infrared reflecting agent is kneaded into the first resin layer 11. Thereby, the solar reflectance can be increased by the first resin layer 11. As a result, it can be expected to suppress the temperature rise inside the outdoor heat insulation sheet 1A. Details will be described later with reference to FIG. 4.

[0023] (Manufacturing method of the outdoor heat insulation sheet 1A) As a method for manufacturing the outdoor heat-insulating sheet 1A, first, a moisture-curing adhesive layer (not shown) is interposed between the second resin layer 12 and the first reinforcing cloth 13 and bonded together to obtain a laminated structure of the second resin layer 12 and the first reinforcing cloth 13 that are integrated with each other.

[0024] Next, between the second resin layer 12 of the second resin layer 12 and the first reinforcing cloth 13 that are integrated with each other and the first resin layer 11, the resin forming the first resin layer 11 and the infrared reflective material are kneaded by a Banbury mixer, and then kneaded by the warm-up roll of a two-roll mill. Subsequently, the kneaded material is adhered to the drawn surface of the second resin layer that has been drawn by a reverse L-shaped four-roll calender to a thickness of 0.3 mm. Thus, an outdoor heat-insulating sheet 1A having a three-layer structure of the first resin layer 11, the second resin layer 12, and the first reinforcing cloth 13 is obtained.

[0025] [Embodiment 2: Outdoor heat-insulating sheet 1B] Referring to FIG. 2, the outdoor heat-insulating sheet 1B of the present embodiment will be described. FIG. 2 is a cross-sectional structure diagram of the outdoor heat-insulating sheet 1B.

[0026] In the outdoor heat-insulating sheet 1B of the present embodiment, the first resin layer 11 is disposed on the outermost side, the first reinforcing cloth 13 is disposed inside the first resin layer 11, and the second resin layer 12 is disposed inside the first reinforcing cloth 13. The materials used for the first resin layer 11, the first reinforcing cloth 13, and the second resin layer 12, and the content of the infrared reflective agent in the first resin layer 11 are the same as those of the outdoor heat-insulating sheet 1A of the above embodiment. The thicknesses of the first resin layer 11, the first reinforcing cloth 13, and the second resin layer 12, and the total thickness of the outdoor heat-insulating sheet 1B are also the same as those of the outdoor heat-insulating sheet 1A of the above embodiment.

[0027] Similar to the outdoor heat-insulating sheet 1A, the infrared reflective agent is kneaded into the first resin layer 11 in the outdoor heat-insulating sheet 1B of the present embodiment. Thereby, the solar reflectance can be increased by the first resin layer 11. As a result, it can be expected to suppress the temperature rise inside the outdoor heat-insulating sheet 1B. Details will be described later with reference to FIG. 4.

[0028] (Manufacturing Method of Outdoor Heat Insulating Sheet 1B) As a manufacturing method of the outdoor heat insulating sheet 1B, first, a moisture-curing adhesive layer (not shown) is interposed between the second resin layer 12 and the first reinforcing cloth 13 and bonded together to obtain a laminated structure of the second resin layer 12 and the first reinforcing cloth 13 integrated with each other.

[0029] Next, between the first reinforcing cloth 13 of the second resin layer 12 and the first reinforcing cloth 13 integrated with each other and the first resin layer 11, the resin forming the first resin layer 11 and the infrared reflecting material are kneaded by a Banbury mixer, and then kneaded by the warm-up rolls of two rolls. Subsequently, the kneaded material is adhered to the drawn surface of the first reinforcing cloth 13 subjected to the drawing process with a thickness of 0.3 mm by an inverted L-shaped four-roll calender. Thus, an outdoor heat insulating sheet 1A having a three-layer structure of the first resin layer 11, the first reinforcing cloth 13, and the second resin layer 12 is obtained.

[0030] [Embodiment 3: Outdoor Heat Insulating Sheet 1C] With reference to FIG. 3, the outdoor heat insulating sheet 1C of the present embodiment will be described. FIG. 3 is a cross-sectional structure diagram of the outdoor heat insulating sheet 1C.

[0031] The basic configuration of the outdoor heat insulating sheet 1C of the present embodiment is the same as that of the outdoor heat insulating sheet 1A of the above-described embodiment 1. The difference is that a second reinforcing cloth 14 is provided between the first resin layer 11 and the second resin layer 12. The thickness and material of the second reinforcing cloth 14 are the same as those of the first reinforcing cloth 13. Also in the configuration of this outdoor heat insulating sheet 1C, an infrared reflecting agent is kneaded into the first resin layer in the same manner as in the outdoor heat insulating sheet 1A. Thereby, the solar reflectance can be increased by the first resin layer 11. As a result, it can be expected to suppress the temperature rise inside the outdoor heat insulating sheet 1C. Details will be described later with reference to FIG. 4.

[0032] (Manufacturing Method of Outdoor Heat Insulating Sheet 1C) As a method for manufacturing the outdoor heat shielding sheet 1C, first, a moisture-curing adhesive layer (not shown) is interposed between the second resin layer 12 and the first reinforcing cloth 13 and they are bonded together to obtain a laminated structure of the second resin layer 12 and the first reinforcing cloth 13 integrated with each other. Next, a moisture-curing adhesive layer (not shown) is interposed between the second resin layer 12 and the second reinforcing cloth 14 and they are bonded together to obtain a laminated structure of the second resin layer 12 and the second reinforcing cloth 14 integrated with each other. Thereby, a three-layer structure of the second reinforcing cloth 14, the second resin layer 12, and the first reinforcing cloth 13 is obtained.

[0033] Next, between the second reinforcing cloth 14 of the second reinforcing cloth 14, the second resin layer 12, and the first reinforcing cloth 13 integrated with each other and the first resin layer 11, the resin forming the first resin layer 11 and the infrared reflective material are kneaded by a Banbury mixer, and then kneaded by the warm-up rolls of two rolls. Thereafter, the kneaded material is adhered to the drawn surface of the second reinforcing cloth 14 subjected to the drawing process with a thickness of 0.3 mm by an inverted L-shaped four-roll calender. Thus, an outdoor heat shielding sheet 1C having a four-layer structure of the first resin layer 11, the second reinforcing cloth 14, the second resin layer 12, and the first reinforcing cloth 13 is obtained.

[0034] [Evaluation Results of Outdoor Heat Shielding Sheets 2A to 2C] Next, with reference to FIG. 4, the evaluation results of the outdoor heat shielding sheets 2A to 2C will be described. FIG. 4 is a diagram showing the evaluation results of the outdoor heat shielding sheets 2A to 2C and the evaluation result of Comparative Example 1.

[0035] The configuration of the outdoor heat shielding sheet of Comparative Example 1 uses chlorinated polyethylene in which an infrared reflective agent is not kneaded as the first resin layer 11 as compared with the configuration of the outdoor heat shielding sheet 2A.

[0036] As evaluation items, each item of "color", "heat insulation rate", "sunshine protection (surface temperature)", "solar reflectance", and "water repellency" was evaluated. Regarding the "solar reflectance", the evaluation was carried out by dividing it into the "entire wavelength range (300 nm to 2500 nm)", the "near ultraviolet-visible light range (300 nm to 780 nm)", and the "near infrared range (780 nm to 2500 nm)".

[0037] The evaluation of "water repellency (static contact angle)" is to evaluate the adhesion state of the droplet W1 to a horizontal surface as shown in Fig. 5. The larger the angle θ formed by the tangent to the surface of the droplet W1 and the horizontal plane, the smaller the amount of adhesion of the droplet W1 to the horizontal surface, and the droplet W1 maintains a shape close to a sphere, and it can be evaluated as a droplet W1 with good water repellency. If θ is 150 degrees or more, the droplet W1 bounces on the horizontal surface and can be said to be in a state where it is easy to slide.

[0038] (Outdoor heat insulation sheet 2A) The outdoor heat insulation sheet 2A includes a resin layer on the outside, a fabric layer on the inside, and a film layer between the resin layer and the fabric layer. The thickness of the resin layer is about 0.30 mm. For the resin layer, Byron (registered trademark), Hardlen (registered trademark), urethane, polyvinyl chloride, etc. are used.

[0039] An infrared reflector is kneaded into the resin layer. The infrared reflector means a material capable of reflecting light in the near infrared range (780 nm to 2500 nm) contained in natural light. For example, as the infrared reflector, metal oxides (Fe2O3, Mn3O4, Cr2O3, CoO, CuO), etc. are used. The content of the infrared reflector contained in the rubber layer is about 0.5% to 20%.

[0040] The thickness of the fabric layer is 0.40 mm. Specifically, a nylon fabric with a yarn thickness of 70 decitex is used. The yarn thickness is not limited to this thickness. Also, the material is not limited to nylon. For example, polyester, cotton, etc. can also be used. Also, in addition to the fabric, knit, thin fabric, non-woven fabric, etc. can also be used.

[0041] A PET (polyethylene terephthalate) film with a thickness of 12 μm is used for the film layer.

[0042] A fluorine film is formed on the outermost layer of this outdoor heat-insulating sheet 2A with a fluorine-based water and oil repellent to perform water repellent treatment. Regarding the fluorine film, the solid content adhesion amount of the fluoropolymer is 0.01 g / m2 to 10.5 g / m 2 , preferably 0.05 g / m 2 ~5 g / m 2 , more preferably 0.1 g / m 2 ~2 g / m 2 It is diluted with water to adjust the concentration so that it becomes.

[0043] As the fluorine-based water and oil repellent, for example, it is advisable to use the water and oil repellent processing agent disclosed in Japanese Patent No. 5784812. As an example of a specific fluorine-based water and oil repellent, a repeating unit derived from α-chloroacrylate (A) having a fluoroalkyl group represented by the following formula (1), and a non-fluorine monomer (B) having no fluoroalkyl group and having a hydrocarbon group with 6 or more carbon atoms It is advisable to use a fluoropolymer containing a repeating unit derived from.

[0044] CH2=C(-Cl)-C(=O)-X-Y-Rf···Formula (1) [In the formula, X is -O- or -NH-, Y is a direct bond or a divalent organic group, and Rf is a fluoroalkyl group having 1 to 20 carbon atoms.] Regarding the method of fixing the fluorine-based water and oil repellent to the outer resin layer or fabric layer, for example, it may be carried out as follows. A fluorine-based water and oil repellent with an apparent concentration of 7% is dropped onto the surface of the resin layer or fabric layer at 20 cc / m 2 . Then, using a spatula, the fluorine-based water and oil repellent is uniformly spread on the surface of the resin layer or fabric layer. Then, heat treatment (for example, 170 degrees, 5 minutes) is performed to complete the fluorine film (solid content adhesion amount 0.7 g / m 2 ). The evaluation of the water repellency of the outdoor heat-insulating sheet 2A will be described later.

[0045] The manufacturing method of the outdoor heat-insulating sheet 2A is the same as the method according to the above-described Embodiments 1 to 4, and thus redundant explanations will not be repeated.

[0046] The outdoor heat-insulating sheet 2A having the above-described configuration has a resin layer with a water-repellent function and an infrared reflection function. The heat-insulating rate was "53% (excellent)" and "surface temperature 58°C (good)". The "solar reflectance" was 36% in the "entire wavelength range (300 nm to 2500 nm)", 11% in the "near-ultraviolet / visible light range (300 nm to 780 nm)", and 51% in the "near-infrared range (780 nm to 2500 nm)". The "water repellency (static contact angle)" was >120° (good).

[0047] (Outdoor heat-insulating sheet 2B) The outdoor heat-insulating sheet 2B has a structure in which the film layer and the fabric layer of the above-described outdoor heat-insulating sheet 1A are interchanged. The outdoor heat-insulating sheet 1B having the above-described configuration has a resin layer with a water-repellent function and an infrared reflection function. The heat-insulating rate was "52% (excellent)" and "surface temperature 50°C (good)". The "solar reflectance" was 46% in the "entire wavelength range (300 nm to 2500 nm)", 14% in the "near-ultraviolet / visible light range (300 nm to 780 nm)", and 6.0% in the "near-infrared range (780 nm to 2500 nm)". The "water repellency (static contact angle)" was >120° (good).

[0048] (Outdoor heat-insulating sheet 2C) The outdoor heat-insulating sheet 2C has a structure in which the resin layer and the fabric layer of the above-described outdoor heat-insulating sheet 2A are interchanged, the resin layer is not water-repellent processed, and the fabric layer is water-repellent processed. That is, this fabric layer has a water-repellent function, and the resin layer has an infrared reflection function. The heat-insulating rate was "45% (good)" and "surface temperature 59°C (good)". The "solar reflectance" was 35% in the "entire wavelength range (300 nm to 2500 nm)", 14% in the "near-ultraviolet / visible light range (300 nm to 780 nm)", and 47% in the "near-infrared range (780 nm to 2500 nm)". The "water repellency (static contact angle)" was >120° (good).

[0049] (Comparative Example 1) Comparative Example 1 of the outdoor heat insulation sheet is the same as the configuration of the above-mentioned outdoor heat insulation sheet 2A, but no infrared reflector is kneaded into the resin layer, and no water repellent treatment is performed. The heat insulation rate was "35% (not good)" and "surface temperature 68° (not good)". The "solar reflectance" was 6% in the "entire wavelength range (300 nm to 2500 nm)", 6.6% in the "near ultraviolet / visible light range (300 nm to 780 nm)", and 5.7% in the "near infrared range (780 nm to 2500 nm)", and all were low values in any wavelength range. The "water repellency (static contact angle)" was "<90° (not good)".

[0050] [Specific application examples of outdoor heat insulation sheets] Next, specific application examples of the above-mentioned heat insulation sheets will be described.

[0051] When the above-mentioned outdoor heat insulation sheet is used for outdoor tools (awning materials, tent materials, tarps) and umbrellas, it is possible to prevent wetting and soiling and take measures against solar radiation (using an infrared reflecting material in combination).

[0052] When the above-mentioned outdoor heat insulation sheet is used for wrapping materials (bodies of automobiles, etc., building materials, etc.), it is possible to prevent wetting and soiling and take measures against solar radiation (using an infrared reflecting material in combination).

[0053] When the above-mentioned outdoor heat insulation sheet is used for the bodies of automobiles, etc., building materials, etc., it is possible to prevent wetting and soiling and take measures against solar radiation (using an infrared reflecting material in combination).

[0054] When the above-mentioned outdoor heat insulation sheet is used for clothing, sports and outdoor supplies, it is possible to prevent wetting and soiling and take measures against solar radiation (using an infrared reflecting material in combination).

[0055] It should be considered that all aspects of the embodiments disclosed this time are illustrative and not restrictive. The scope of the present invention is shown not by the above description but by the claims, and it is intended that all modifications within the meaning and scope equivalent to the claims are included.

Explanation of reference numerals

[0056] Outdoor heat-insulating sheets 1A, 1B, and 1C, first resin layer 11, second resin layer 12, first reinforcing cloth 13, and second reinforcing cloth 14.

Claims

1. An outdoor heat-insulating sheet having an inner side and an outer side, a first resin layer, a second resin layer, a first reinforcing cloth, comprising: the first resin layer is disposed on the outermost side, the second resin layer and the first reinforcing cloth are disposed inside the first resin layer, the first resin layer has an infrared reflective agent kneaded therein, an outdoor heat-insulating sheet.

2. The outdoor heat-insulating sheet is used for any one of outdoor tools, awning materials, tent materials, tarps, umbrellas, wrapping materials, bodies of automobiles, building materials, clothing, sports, and outdoor supplies, the outdoor heat-insulating sheet according to claim 1.

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