JP2013023802A - Light-shading fabric having heat-shielding property and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light-shading fabric which is thin and light-weight, is excellent in light-shading property and has a high average reflectance to an infrared ray to hardly cause high temperatures.SOLUTION: There is provided a light-shading fabric 11 in which at least one face of a fabric 12 is provided with a light-shading infrared ray reflection layer 14. The light-shading infrared ray reflection layer 14 contains a light-shading pigment and an infrared ray reflection pigment at a weight ratio of 2:1-1:10. The light-shading fabric 11 has a light-shading property of 99.99% or more according to a JIS L1055A method and an average reflectance to an infrared ray in 800-2500 nm of 55% or more.

Description

  The present invention relates to a light-shielding fabric that can be suitably used for, for example, an umbrella, a tent, clothing, or a curtain, and a method for manufacturing the same. More specifically, the present invention relates to a light-shielding fabric that is thin and lightweight, has excellent light-shielding properties, has high infrared average reflectance, and has excellent heat-shielding properties that do not easily reach high temperatures, and a method for producing the same.

Conventionally, as a light-shielding fabric that can be suitably used for umbrellas, tents, clothing, or curtains, a binder, titanium oxide, and black pigment are mixed at a solid weight ratio of 10:10 on the back side of a dyed and water-repellent fabric. ~ 4: A black undercoating coating layer containing 1.2 to 0.5 is coated to a thickness of 20 to 50 g / m ² in solid content, and an overcoating coating layer containing a colorant is formed thereon. And a coating at a rate of 8 to 25 g / m ² has been proposed (see, for example, Patent Document 1).

  In this light-shielding fabric, the light-shielding property is derived by using a black pigment containing carbon black or the like as a main component, and a perfect light-shielding property can be obtained with one piece of fabric, thus providing a heavy curtain. In addition, there is an advantage that it can be applied to uses such as umbrellas and clothing in which the presence of the resin layer cannot be felt so much.

JP 2008-115488 A

  However, since the black pigment mainly composed of carbon black or the like has a high infrared absorptivity, the higher the light shielding property, the higher the infrared absorptivity. Since the black pigment that has absorbed infrared rays converts infrared rays into heat inside the pigment, the light-shielding fabric has a disadvantage that it easily absorbs infrared rays and becomes high temperature while obtaining high light-shielding properties.

  The present invention has been made in view of such problems, and is a light-shielding fabric that is thin and lightweight, has excellent light-shielding properties, and has excellent heat-shielding properties that have high average reflectance of infrared rays and that do not easily reach high temperatures. And it aims at providing the manufacturing method.

  In order to achieve the above object, the invention according to claim 1 is a light-shielding fabric in which a light-shielding infrared reflective layer is provided on at least one side of the fabric, wherein the light-shielding infrared reflective layer includes a light-shielding pigment and an infrared reflective pigment. The light-shielding fabric has a light-shielding property of 99.99% or more according to the JIS L1055A method, and has an average infrared reflectance at 800 to 2500 nm of 55. The gist of the invention is a light-shielding fabric characterized by being at least%.

  The invention according to claim 2 is characterized in that the light-shielding infrared reflective layer comprises a light-shielding layer containing a light-shielding pigment and an infrared reflective layer containing an infrared reflective pigment. It was.

  The gist of the invention described in claim 3 is that the infrared ray reflective layer is disposed on the light-irradiated surface side of the light shield infrared ray reflective layer.

  According to a fourth aspect of the present invention, the light-shielding pigment is one or a mixture of two or more selected from carbon black, iron oxide, titanium oxide graphite, zinc oxide, calcium carbonate, aluminum hydroxide, and barium sulfate. The gist of the light-shielding fabric according to any one of claims 1 to 3.

  In the invention according to claim 5, the infrared reflective pigment is any one or two selected from Fe-Cr-O pigments, bismuth manganese oxide pigments, alkaline earth manganese oxide pigments and copper-magnesium compound pigments. The gist of the light-shielding fabric according to any one of claims 1 to 3, which is a mixture of at least seeds.

The invention according to claim 6 is characterized in that the light-shielding infrared reflective layer is coated on the fabric at a solid content of 10 to 100 g / m ² . The gist is a light-shielding fabric.

  The gist of the invention described in claim 7 is that the water-repellent layer is provided on the inner side of the light-shielding infrared reflecting layer.

  The invention according to claim 8 is a method for producing a light-shielding fabric in which a light-shielding infrared reflective layer is provided on at least one surface of the fabric, the infrared reflective coating comprising an infrared reflective pigment and a binder material on at least one surface of the fabric. An infrared reflective layer is formed by applying a composition, and then a light shielding coating composition including a light shielding pigment and a binder material is applied on the upper surface of the infrared reflective layer to form a light shielding layer. The manufacturing method of was made the summary.

According to the ninth aspect of the present invention, the light-shielding layer is applied to the upper surface of the infrared reflective layer so as to have a solid content of 3 to 50 g / m ² , and the infrared reflective layer is applied to the upper surface of the fabric with 7 to 70 g / solid. The gist of the method for producing a light-shielding fabric according to claim 8, which is applied so as to be a ratio of m ² .

  In the light-shielding fabric of the present invention, the light-shielding infrared reflective layer provided on at least one side of the fabric contains the light-shielding pigment and the infrared reflective pigment in a weight ratio of 2: 1 to 1:10. JIS L1055A Since the average reflectance of infrared rays at 800 to 2500 nm is 55% or more, it is thin and lightweight, has excellent light shielding properties, and the average of infrared rays. It has the effect of having excellent heat shielding properties that are high in reflectance and difficult to reach high temperatures.

The principal part expanded sectional view which shows the light-shielding fabric of this invention. The principal part expanded sectional view which shows another form of the light-shielding fabric of this invention. The principal part expanded sectional view which shows another form of the light-shielding fabric of this invention. The schematic diagram which shows the apparatus which measures the light-shielding property and infrared reflectance of the light-shielding fabric of this invention.

  Hereinafter, the light-shielding fabric of the present invention and the production method thereof will be described in more detail. As shown in FIGS. 1 and 2, the light-shielding fabric 11 of the present invention has a light-shielding infrared reflective layer 14 provided on at least one surface of a fabric 12. The cloth used for the light-shielding cloth of the present invention is not particularly limited, and can be appropriately determined according to the use and use conditions such as an umbrella, a tent, clothing, or a curtain. For example, polyester fiber, polyamide fiber, polyacrylic A fabric having synthetic fibers such as fibers, polyethylene fibers, polypropylene fibers, and polyvinyl alcohol fibers, and natural fibers such as cotton, hemp, wool, etc., alone or a mixture of two or more thereof can be used.

  As the fabric structure, at least one selected from woven fabrics, knitted fabrics and non-woven fabrics can be used. Among these, fabrics made of cotton or polyester fibers are preferred, and the polyester fibers include long fibers, Short fibers or a mixture of these can be used, specifically, polyethylene terephthalate, polybutylene terephthalate, or polyester obtained by copolymerizing or blending such as polyethylene glycol or isophthalic acid. Can be mentioned.

  When a light-shielding infrared reflective layer, which will be described later, is provided on the fabric, the coating composition constituting the light-shielding infrared reflective layer penetrates deeply into the fabric and damages the original texture of the fabric. In order to prevent bleeding, it is preferable to provide a water-repellent layer 13 on the surface of the fabric 12 by performing a water-repellent treatment as shown in FIGS. As the water repellent treatment agent used for the water repellent treatment, conventionally known fluorine-based, silicon-based and wax-based agents can be used.

  As a method for applying the water repellent agent to the fabric, conventionally known methods such as a dipping method, a spray method, and a rotary touch method can be used.

  A light-shielding infrared reflective layer is provided on at least one side of the fabric. This light-shielding infrared reflective layer contains a light-shielding pigment and an infrared reflective pigment. The light-shielding pigment is a component that imparts light-shielding properties by blocking the incidence of visible light, or by effectively absorbing the visible light and blocking its incidence. Specifically, carbon black, iron oxide And any one or a mixture of two or more selected from titanium oxide, graphite, zinc oxide, calcium carbonate, aluminum hydroxide and barium sulfate. Among these, carbon black is particularly preferable from the viewpoint of absorption rate, dispersion stability, and cost. The light-shielding pigment preferably has an average particle diameter of 0.001 to 20 μm from the viewpoint of dispersion stability.

The light-shielding infrared reflective layer is preferably coated on the fabric at a solid content of 10 to 100 g / m ^2. The content of the light-shielding pigment in the light-shielding infrared reflective layer is applied on the fabric. Sometimes it is desirable to have a solid content of 1-10 g / m ² . This is because if the content of the light-shielding pigment is out of the above range, sufficient light-shielding properties may not be obtained or the texture of the fabric may be impaired.

  Infrared reflective pigment is a component that reflects infrared rays and effectively suppresses the temperature rise of the fabric due to infrared absorption. Specifically, Fe-Cr-O pigment, bismuth manganese oxide pigment, alkaline earth-manganese oxidation Examples thereof include any one kind or a mixture of two or more kinds selected from product pigments and copper-magnesium compound pigments.

The content of the infrared reflective pigment in the light-shielding infrared reflective layer is desirably 1 to 30 g / m ² in terms of solid content when applied on the fabric. When the content of the infrared reflective pigment is out of the above range, a sufficient infrared reflective effect may not be obtained or the texture of the fabric may be impaired.

The light-shielding infrared reflective layer can be obtained by applying a coating composition containing the light-shielding pigment and the infrared reflective pigment to a fabric. In addition to the light-shielding pigment and the infrared reflective pigment, the coating composition includes a binder polymer for fixing the light-shielding pigment and the infrared reflective pigment to the fabric, and water or an organic solvent for dispersing the light-shielding pigment, the infrared reflective pigment, and the binder polymer. And a surfactant and a dispersant can be used.

  Examples of the binder polymer include acrylic polymer, acrylic styrene copolymer, acrylic urethane copolymer, acrylic styrene copolymer, acrylic maleic acid copolymer, acrylic butadiene copolymer, acrylic vinyl acetate copolymer, ethylene vinyl acetate copolymer, polyurethane, polyolefin, SBR, NBR, and the like. be able to.

Examples of the organic solvent include propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, cyclohexanone, and cyclohexanol. Examples of the surfactant include nonionic surfactants such as polyether derivatives and polyvinylpyrrolidone derivatives, anionic surfactants such as polymers containing sulfonic acid and carboxylic acid, and salts thereof, and amine compounds. And cationic surfactants such as imidazoline. Examples of the dispersant include polyacrylic acid and polymethacrylic acid.

  The water or organic solvent, the surfactant, the type of dispersant, the blending ratio, and the like constituting the coating composition are arbitrary. The use and use state of the light-shielding fabric of the present invention, the types of light-shielding pigment and infrared reflective pigment, and the It may be determined appropriately in consideration of the material and type.

  The light-shielding infrared reflective layer can be formed by applying the coating composition to the fabric surface by a conventionally known coating method such as knife coating, roll coating, gravure coating, or dipping.

  In addition to the form in which both the light-shielding pigment and the infrared-reflecting pigment are contained in one layer, the light-shielding infrared reflective layer has a light-shielding layer 15 containing a light-shielding pigment and an infrared reflective material as shown in FIGS. The form which consists of the infrared reflective layer 16 containing a pigment can also be taken.

  Hereinafter, the embodiment shown in FIGS. 1 and 2 will be described. FIG. 1 shows a form in which a light-shielding infrared reflective layer 14 is provided on one side of the fabric 12, and FIG. 2 shows a form in which the light-shielding infrared reflective layer 14 is provided on both sides of the fabric 12. is there. Which form of FIGS. 1 and 2 is to be selected may be appropriately determined according to the application and usage state. For example, when the light-shielding fabric of the present invention is applied to applications such as umbrellas and clothing, the fabric shown in FIG. 1 in which the light-shielding infrared reflective layer 14 is provided on one side of the fabric 12 is preferable. 2 is preferably used in applications such as a tent, the configuration shown in FIG. 2 in which the light-shielding infrared reflective layer 14 is provided on both sides of the fabric 12 is preferable.

A light-shielding fabric 11 shown in FIG. 1 has a light-shielding infrared reflective layer 14 composed of a light-shielding layer 15 containing a light-shielding pigment and an infrared reflective layer 16 containing an infrared reflective pigment on one side of the fabric 12. The light-shielding fabric 11 shown in FIG. 1 is assumed to be applied to an umbrella. In this case, the fabric 12 side is a sunshine side, and the side on which the light-shielding infrared reflective layer 14 is formed is a human body side. An infrared reflection layer 16 is provided on the fabric side irradiated with light, and a light shielding layer 15 including a light shielding pigment is provided on the outside of the infrared reflection layer 16 so that infrared rays from sunlight transmitted through the fabric 12 are transmitted. Visible light that is effectively reflected by the infrared reflective pigment contained in the infrared reflective layer 16 inside the light-shielding infrared reflective layer 14 and transmitted through the infrared reflective layer 16 is contained in the light-shielding layer 15 outside the light-shielding infrared reflective layer 14. The light-shielding pigment is surely shielded from light.

  The light-shielding infrared reflective layer 14 in the light-shielding fabric 11 shown in FIG. 1 is formed by applying an infrared reflective coating composition containing an infrared reflective pigment and a binder material to one side of the fabric to form the infrared reflective layer 16. The light-shielding layer 15 can be formed by applying a light-shielding coating composition containing a light-shielding pigment and a binder material on the upper surface of the infrared reflective layer 16.

  In the light-shielding fabric 11 of the present invention, for example, the side where the light-shielding infrared reflective layer 14 is formed is the sunshine side and the fabric 12 side is the human body side, as shown in FIG. In addition, a configuration in which the light shielding layer 15 is formed on one surface of the fabric 12 and the infrared reflection layer 16 is formed on the upper surface of the light shielding layer 15 may be employed.

The light-shielding coating composition used for forming the light-shielding layer 15 is prepared by blending the light-shielding pigment, the binder polymer, water or an organic solvent in which the light-shielding pigment and the binder polymer are dispersed, a surfactant, and a dispersant. Can be used. The blending ratio of each component of the light-shielding coating composition is arbitrary, and may be appropriately determined in consideration of the use and use state of the light-shielding fabric of the present invention, the type of light-shielding pigment, the material and type of the fabric, and the like.

The infrared reflective coating composition used for forming the infrared reflective layer 16 includes the above-described infrared reflective pigment, a binder polymer, water or an organic solvent in which the infrared reflective pigment and the binder polymer are dispersed, a surfactant, and a dispersant. What was blended can be used. The blending ratio of each component of the infrared reflective coating composition is arbitrary, and may be appropriately determined in consideration of the use and use state of the light-shielding fabric of the present invention, the type of light-shielding pigment, the material and type of the fabric, and the like.

  The light-shielding layer 15 and the infrared-reflective layer 16 are made of the above-described light-shielding coating composition and the infrared-reflective coating composition by a known coating method such as knife coating, roll coating, gravure coating, or dipping. It can be formed by applying to the surface.

  Moreover, the light shielding layer 15 and the infrared reflective layer 16 which comprise the light-shielding infrared reflective layer 14 are not restricted to one layer, It is good also as a multiple layer by repeating and applying several application | coating repeatedly. For example, the light shielding layer 15 may be a plurality of layers, the infrared reflection layer 16 may be a single layer, the light shielding layer 15 may be a single layer, the infrared reflection layer 16 may be a plurality of layers, or both the light shielding layer 15 and the infrared reflection layer 16 may be a plurality of layers. The layer may be appropriately determined in consideration of the application and use state of the light-shielding fabric of the present invention, the type of light-shielding pigment, the material and type of the fabric, and the like.

  The light-shielding fabric of the present invention is, for example, blended with a light-shielding coating composition constituting the light-shielding layer 15 and the infrared reflective layer 16 and an additive such as an ultraviolet absorber and a fragrance in the infrared reflective coating composition. It can be freely changed within the range described in the range.

  Table 1 below shows the compositions of the light shielding fabrics of Examples 1 and 2 and Comparative Examples 1 and 2, and Table 1 also shows the evaluation results of the light shielding properties and infrared reflectivity of the respective light shielding fabrics. The light shielding property was evaluated according to JIS L1055A.

  As shown in FIG. 4, the infrared reflectivity is set by setting black drawing paper on a test table, placing each light-shielding fabric (test sample) on the black drawing paper at an interval of about 5 mm, This was performed by irradiating lamp light from a position 50 cm away from the upper surface of the light-shielding fabric (test sample) and measuring the temperature at the center of the back side of the drawing paper with a thermocouple over time. Note that the test was performed twice at different positions, and the average value of the data was used as the test result. The lamp used was an eye lamp (Spot, PRS100V, 500W) manufactured by Iwasaki Electric Co., Ltd., and the irradiation time of the lamp was 15 minutes. The room temperature at the time of measurement was 23.0 ± 2 ° C.

From Table 1, each light-shielding fabric according to Comparative Examples 1 and 2 had no good light-shielding property and average infrared reflectance, whereas each light-shielding fabric according to Examples 1 and 2 Is JIS
The L1055A method has a light-shielding property of 99.99% or more, and the infrared average reflectance at 800 to 2500 nm is 55% or more, and it was confirmed that the light-shielding property and the infrared reflecting effect are excellent.

  The light-shielding fabric of the present invention is thin and light, has excellent light-shielding properties, and has high heat-shielding properties that are high in average infrared reflectance and difficult to reach high temperatures. It can be suitably used for clothing or curtains.

DESCRIPTION OF SYMBOLS 12 ... Fabric 13 ... Water-repellent layer 14 ... Light-shielding infrared reflective layer 15 ... Light-shielding layer 16 ... Infrared reflective layer

Claims (9)

In the light-shielding fabric provided with a light-shielding infrared reflective layer on at least one side of the fabric,
The light-shielding infrared reflective layer contains a light-shielding pigment and an infrared reflective pigment in a weight ratio of 2: 1 to 1:10, and the light-shielding fabric has a light shielding property of 99.99% or more according to JIS L1055A method. And an average reflectance of infrared rays at 800 to 2500 nm is 55% or more.   The light-shielding fabric according to claim 1, wherein the light-shielding infrared reflective layer comprises a light-shielding layer containing a light-shielding pigment and an infrared reflective layer containing an infrared reflective pigment.   The light-shielding fabric according to claim 2, wherein an infrared reflective layer is disposed on the light-irradiated surface side of the light-shielding infrared reflective layer.   The light-shielding pigment is one or a mixture of two or more selected from carbon black, iron oxide, titanium oxide graphite, zinc oxide, calcium carbonate, aluminum hydroxide, and barium sulfate. The light-shielding fabric according to any one of the above.   The infrared reflective pigment is one or a mixture of two or more selected from an Fe-Cr-O pigment, a bismuth manganese oxide pigment, an alkaline earth-manganese oxide pigment, and a copper-magnesium compound pigment. The light-shielding fabric according to claim 1. Light-blocking fabric according to claim 1, light-shielding infrared reflective layer, characterized in that it is coated at a rate of 10 to 100 g / m ² on a solids on fabric.   The light-shielding fabric according to any one of claims 1 to 6, wherein a water-repellent layer is provided inside the light-shielding infrared reflective layer. A method for producing a light-shielding fabric in which a light-shielding infrared reflective layer is provided on at least one side of the fabric,
An infrared reflective coating composition containing an infrared reflective pigment and a binder material is applied to at least one surface of the fabric to form an infrared reflective layer, and then a light-shielding coating composition comprising a light-shielding pigment and a binder material on the upper surface of the infrared reflective layer A method for producing a light-shielding fabric, comprising applying a product to form a light-shielding layer. The light shielding layer is applied to the upper surface of the infrared reflective layer so that the solid content is 3 to 50 g / m ² , and the infrared reflective layer is applied to the upper surface of the fabric so that the solid content is 7 to 70 g / m ^2. The method for producing a light-shielding fabric according to claim 8.

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