Slats and blinds using the same

Abstract

To provide a slat and a blind using the same, which can improve a design and also prevent a glare phenomenon.SOLUTION: A slat 100 used for a horizontal blind 10 which can be installed on an opening comprises a slat base material 110 and a coating film 120 formed on a surface of the slat base material 110 and comprising a thermosetting resin layer 124 including design pigments for coloring the surface. A concave-convex surface is formed on a slat surface. A specular gloss of the slat surface at 85 degrees defined under [JIS Z8741(1997)] is 7 or less. With this configuration, a slat and a blind using the same which can improve a design and also prevent a glare phenomenon can be obtained.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a slat and a blind using the same. [Background technology]

[0002] A conventional slat is shown in Japanese Utility Model Publication No. 2-15995 (Patent Document 1). The one disclosed in Patent Document 1 forms a shrink coating film on the surface of the slat material plate by oxidative polymerization of the coating agent after painting. This gives a soft appearance that is completely different from smooth painting and matte processing, and has the effect of preventing glare by scattering sunlight at various angles. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Publication number 2-15995 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, in the conventional slats as described above, although the glare phenomenon can be prevented, the unevenness that constitutes the shrinkage pattern is conspicuous, and therefore there is a problem that the design differs significantly from that of a typical slat painted surface.

[0005] The present invention has been made in consideration of such problems, and its object is to provide a slat and a blind using the same that can improve design while preventing the glare phenomenon. [Means for solving the problem]

[0006] In order to solve the above problems, according to a first aspect of the present invention, there is provided a slat for use in a blind that can be installed in an opening, comprising a slat base material and a coating film formed on the surface of the slat base material and consisting of a thermosetting resin layer containing a decorative pigment for presenting a surface color, wherein an uneven surface is formed on the slat surface, and the slat surface has a specular gloss of 7 or less at 85 degrees as defined in "JIS Z8741 (1997)".

[0007] According to this configuration, by forming an uneven surface on the slat surface and setting the specular gloss of the slat surface to 7 or less, most of the external light can be diffusely reflected, thereby suppressing glare.

[0008] The present invention can be applied in various ways. For example, the specular reflectance of the slat surface in the visible light region at incident angles of 30 degrees and 60 degrees may be 0.7% or less. With this configuration, almost all visible light, more than 99%, at each incident angle is absorbed or diffusely reflected by the slat surface, so glare can be suppressed regardless of the inclination angle of the slat.

[0009] The decorative pigment may be a solar heat shielding pigment having high reflectivity in the near infrared region. With this configuration, a slat having both glare suppression and heat shielding properties can be obtained in a process similar to a general slat processing process.

[0010] The coating may also include a plurality of resin beads dispersed on the surface of the slat base material. With this configuration, the coating is made of a thermosetting resin layer containing a design pigment for providing a surface color and a plurality of resin beads dispersed therein, forming unevenness on the slat surface, so that the slat can be manufactured using the same processing steps as for general slats that do not have a glare suppression effect, and the design of the slat becomes closer to that of general slats. Furthermore, the uneven surface can diffusely reflect external light to suppress glare. Therefore, the design can be improved while preventing the glare phenomenon.

[0011] The average thickness of the coating film may be 30 μm or less, the average length of the resin beads in the coating film thickness direction may be 40 μm or less, and at least some of the resin beads may be larger than the average coating film thickness. Since resin beads larger than the coating film thickness are dispersed in the thermoplastic resin layer, gentle unevenness is formed on the slat coating surface, which can eliminate design defects and improve the design. In addition, the uneven surface can diffuse and reflect external light to suppress glare.

[0012] The ratio of the resin beads in the coating film may be 5 to 15%. With this configuration, appropriate irregularities can be formed on the surface of the slats, allowing external light to be diffusely reflected.

[0013] The resin beads may have an average particle size of 20 to 35 μm. By setting the average particle size of the resin beads to 20 to 35 μm, gentle unevenness is formed on the slat surface by the coating film.

[0014] The uneven surface may be formed by scraping off the surface of the coating film by blasting with sand particles. The uneven surface diffuses and reflects external light to suppress glare. Therefore, it is possible to improve the design while preventing the glare phenomenon.

[0015] The uneven surface may be formed by deforming the surface of the coating film during molding by roll forming using a forming roll having unevenness. The uneven surface can diffusely reflect external light and suppress glare. Therefore, it is possible to improve the design while preventing the glare phenomenon.

[0016] The thermosetting resin constituting the thermosetting resin layer may contain a substance that is burned away during baking, and the uneven surface may be formed by holes formed when the substance is burned away during baking. The uneven surface can diffusely reflect external light to suppress glare. Therefore, it is possible to improve the design while preventing the glare phenomenon.

[0017] The uneven surface may be formed by forming a coating film on the surface of the slat base material that has been embossed. The uneven surface can diffuse and reflect external light to suppress glare. Therefore, it is possible to improve the design while preventing the glare phenomenon.

[0018] According to a second aspect of the present invention, there is provided a blind using the slat according to the first aspect of the present invention.

[0019] With this configuration, the multiple slats cause external light reflected from one adjacent slat surface to be reflected from the other slat surface, further increasing the proportion of diffuse reflection, thereby reliably suppressing glare and eliminating discomfort for residents in the space where the blinds are installed. Effect of the Invention

[0020] According to the slat of the present invention and the blind using the same, it is possible to improve the design while preventing the glare phenomenon. Other effects of the present invention will be described in the description of the embodiment of the invention below. [Brief description of the drawings]

[0021] [Figure 1] FIG. 1 is a perspective view of a horizontal blind 10 according to a first embodiment. [Diagram 2] 1A and 1B are diagrams for explaining a slat 100, in which (a) is an oblique view showing a portion of the slat 100, (b) is an enlarged view of portion a of the slat 100 in (a), and (c) is an enlarged cross-sectional view of portion b of the slat 100 in (a). [Diagram 3] 1 is a cross-sectional view showing an outline of the reflection characteristics of a slat 100. FIG. [Figure 4] FIG. 2 is a conceptual diagram showing reflection characteristics in the visible light region. [Diagram 5] 1 is a schematic diagram showing the reflection characteristics of a horizontal blind 10. FIG. [Figure 6] This is a conceptual diagram of measurement according to JIS Z8741 (1997). [Figure 7]FIG. 2 is a diagram showing specular gloss by color of the slat 100 and a comparative example slat. [Figure 8] FIG. 1 shows the specular reflectance and spectral reflectance of visible light at each incident angle of slat 100 and a comparative example slat, where (a) shows the spectral reflectance at an incident angle of 30°, (b) shows the spectral reflectance at an incident angle of 60°, and (c) is a bar graph showing the specular reflectance at incident angles of 30° and 60° calculated by multiplying (a) and (b) by the weighting coefficient for visible light reflectance in JIS R3106 (2019) and taking a weighted average. [Figure 9] FIG. 2 is a diagram showing the solar reflectance of the slat 100 and a slat of a comparative example. [Figure 10] FIG. 2 is a perspective view of a vertical blind 20 according to a second embodiment. [Figure 11] FIG. 13 is a diagram for explaining a slat 400 of a horizontal blind according to a third embodiment, where (a) is a flow chart showing a process for processing the slat 400, and (b) is a partial cross-sectional view of the slat 400. [Figure 12] 10A and 10B are diagrams for explaining a slat 500 of a horizontal blind according to a fourth embodiment, where (a) is a flow chart showing a process for processing the slat 500, and (b) is a partial cross-sectional view of the slat 500. FIG. [Figure 13] 10A and 10B are diagrams for explaining a slat 600 of a horizontal blind of a fifth embodiment, in which (a) is a flowchart showing the processing steps of the slat 600, (b) is a partial cross-sectional view showing the state in which the coating film 620 is baked onto the slat base material 610, and (c) is a partial cross-sectional view of the slat 600. [Figure 14] FIG. 13 is a diagram for explaining a slat 700 of a horizontal blind according to a sixth embodiment, where (a) is a flow chart showing a process for processing the slat 700, and (b) is a partial cross-sectional view of the slat 700. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this specification and the drawings, components having substantially the same functional configurations are designated by the same reference numerals, and redundant description will be omitted.

[0023] (First embodiment) A horizontal blind 10 of this embodiment will be described with reference to Fig. 1. Fig. 1 is a perspective view of the horizontal blind 10 of this embodiment. As shown in Fig. 1, the horizontal blind 10 is configured to include a head box 12 fixed to a window frame or the like (not shown), a ladder cord 14 tiltably hanging down from the head box 12, a number of slats 100 supported in an aligned state by the ladder cord 14, a bottom rail 16 to which the lower ends of the ladder cord 14 are connected, a lifting / lowering cord 18 that hangs down from the head box 12, passing through the slats 100, and has a lower end connected to the bottom rail 16, and an operating unit 19 that hangs down from one end of the head box 12 and is used to operate the ladder cord 14 and the lifting / lowering cord 18.

[0024] The slat 100, which is a characteristic component of this embodiment, will be described with reference to Fig. 2 and Fig. 3. Fig. 2 is a diagram for explaining the slat 100, and Fig. 3 is a cross-sectional view showing an outline of the reflection characteristics of the slat 100.

[0025] 2, the slat 100 has a slat base material 110 and a coating film 120 formed on the surface of the slat base material 110 and made of a thermosetting resin layer 124 containing a plurality of dispersed resin beads 122 and a design pigment for providing a surface color, and the average thickness of the coating film 120 is 30 μm or less, the average length (average particle size) of the resin beads 122 in the coating film thickness direction is 40 μm or less, and more preferably, the average thickness of the coating film 120 is 11 to 20 μm or less, so that a stable coating film can be formed on the slat base material 110. By making the size of at least some of the resin beads 122 larger than the average coating thickness, the coating film 120 forms gentle irregularities on the slat surface 100a.

[0026] (Slat base material 110) The slat base material 110 is in the form of a long plate that is slightly curved in the short direction, as shown in Fig. 2. The slat base material 110 is made of a metal material such as aluminum or an aluminum alloy.

[0027] (Paint film 120) The coating film 120 is formed on the surface of the slat base material 110. As shown in Figs. 2(b) and (c), the coating film 120 is composed of a thermosetting resin layer 124 in which a plurality of resin beads 122 are dispersed and which contains a design pigment for providing a surface color. The resin beads 122 are made of acrylic beads or the like. The ratio of the resin beads 122 in the coating film 120 is preferably 5 to 15%. In a prototype in which the ratio of the resin beads 122 is 5%, the specular gloss at 85 degrees as defined by "JIS Z8741 (1997)" is 3. The thermosetting resin layer 124 is made of acrylic resin, polyester resin, or the like. The design pigment is preferably made of a solar heat shielding pigment that has high reflectivity in the near infrared region.

[0028] The average thickness of the coating film 120 is 30 μm or less, and the average length in the coating film thickness direction of the resin beads 122 (average particle size) is 40 μm or less. More preferably, the resin beads 122 are spherical and have an average particle size of 20 to 35 μm, more preferably 25 to 30 μm. The size of at least some of the resin beads 122 is larger than the average coating film thickness. With this configuration, the coating film 120 forms gentle irregularities on the slat surface 100a.

[0029] The slat surface 100a is configured to have a specular gloss of 7 or less at 85 degrees as defined by "JIS Z8741 (1997)." As shown in Fig. 3, the slat surface 100a configured in this manner diffuses and reflects most of the external light when it hits the resin beads 122. This reduces glare on the slat surface 100a.

[0030] The configuration of this embodiment has been described above. Next, the reflection characteristics of the slat surface 100a of the slat 100 configured as described above will be described with reference to Fig. 4 and Fig. 5. Fig. 4 is a conceptual diagram showing the reflection characteristics in the visible light range. Fig. 5 is a schematic diagram showing the reflection characteristics of the horizontal blind 10.

[0031] First, the reflection characteristics in the visible light region will be described. When incident light NL hits the slat surface 100a of the slat 100 at an angle Θ as shown in Fig. 4, a part of the light is specularly reflected at the angle Θ to become specularly reflected light SL, and the remaining light is diffusely reflected to become diffusely reflected light KL.

[0032] Next, the reflection characteristics when the slat 100 having such reflection characteristics is applied to a horizontal blind 10 will be described. As shown in Fig. 5, when the incident light NL hits the slat surface 100a of the slat 100, a part of the light is specularly reflected to become specularly reflected light SL, and the remaining light is diffusely reflected to become diffusely reflected light KL1. The specularly reflected light SL specularly reflected by the slat surface (upper surface) 100a hits the slat surface (lower surface) 100a of the slat 100 located one level above. At this time, since the specularly reflected light SL is only a part of the incident light NL, the amount of specular reflection is minute, and most of the light is diffusely reflected. The diffusely reflected light KL2 at this time is very small.

[0033] The concept of the reflection characteristics of the slat 100 of this embodiment has been described above. Next, the specular gloss of the slat 100 will be evaluated with reference to Figs. 6 and 7. Fig. 6 is a conceptual diagram of measurement according to JIS Z8741 (1997). Fig. 7 is a diagram showing the specular gloss of the slat 100 and a slat of a comparative example by color. In the following description, the slat of the comparative example is a general slat unless otherwise specified.

[0034] The specular gloss is measured according to JIS Z8741 (1997). As shown in Fig. 6, a light source 200 is placed so that the incident light is incident at 20 degrees, 60 degrees, and 85 degrees with respect to the vertical plane of the slat surface 100a. Then, a light receiver 210 is placed at positions of 20 degrees, 60 degrees, and 85 degrees with respect to the vertical plane of the slat surface 100a, and the measurement is performed.

[0035] The specular gloss of the slat 100 of this embodiment and the slat of the comparative example when the incident light is at 20 degrees, 60 degrees, and 85 degrees will be compared with reference to Fig. 7. When the incident light is at 20 degrees, the specular gloss of the slat 100 is highest when the slat color is light gray, at 2.7. In contrast, the specular gloss of the slat of the comparative example is lowest when the slat color is light gray, at 5.7. Thus, when the incident light is at 20 degrees, the highest specular gloss of the slat 100 is lower than the lowest specular gloss of the slat of the comparative example.

[0036] Next, when the incident light is at 60 degrees, the specular gloss of the slat 100 is highest when the slat color is dark gray, being 4.6. In contrast, the specular gloss of the slat of the comparative example is lowest when the slat color is light gray, being 30.9. Thus, when the incident light is at 60 degrees, the highest specular gloss of the slat 100 is much lower than the lowest specular gloss of the slat of the comparative example, and it is clear that the gloss of the slat surface 100a is low.

[0037] Next, when the incident light is 85 degrees, the specular gloss of the slat 100 is highest when the slat color is dark gray, being 6.1. In contrast, the specular gloss of the slat of the comparative example is lowest when the slat color is light gray, being 62.2. Thus, when the incident light is 85 degrees, the highest specular gloss of the slat 100 is much lower than the lowest specular gloss of the slat of the comparative example, and it is clear that the gloss of the slat surface 100a is low.

[0038] The specular gloss of the slat 100 has been described above. Next, the visible light regular reflectance of the slat 100, the heat-shielding slat of Comparative Example 1, and the general slat of Comparative Example 2 at each incident angle will be described with reference to FIG. 8. FIG. 8 is a diagram showing the regular reflectance and spectral reflectance of visible light at each incident angle of the slat 100 and the slat of the comparative example, where (a) shows the spectral reflectance when the incident angle is 30°, (b) shows the spectral reflectance when the incident angle is 60°, and (c) is a bar graph showing the regular reflectance at incident angles of 30° and 60° calculated by multiplying (a) and (b) by the weighting coefficient of the visible light reflectance of JIS R3106 (2019) and taking a weighted average.

[0039] When the angle of incidence from light source 200 is 30°, as shown in Figures 8(a) and (c), the regular reflectance of slat 100 is 0.27, while the regular reflectance of Comparative Example 1 is 1.11, and the regular reflectance of Comparative Example 2 is 1.10. When the angle of incidence from light source 200 is 60°, as shown in Figures 8(b) and (c), the regular reflectance of slat 100 is 0.38, while the regular reflectance of Comparative Example 1 is 3.31, and the regular reflectance of Comparative Example 2 is 3.15.

[0040] Thus, since the specular reflectance of the slat surface 100a of the slat 100 in the visible light region at incident angles of 30 degrees and 60 degrees is approximately 0.4% or less, almost all of the visible light, exceeding 99%, at each incident angle is absorbed or diffusely reflected by the slat surface 100a. Therefore, even if the slat angle is changed according to the position of the sun, glare can be suppressed independently of the inclination angle of the slat 100.

[0041] Above, the regular reflectance of slat 100 has been explained in comparison with the regular reflectance of the heat-shielding slat of Comparative Example 1 and the general slat of Comparative Example 2. Next, the solar shading rates of slat 100, heat-shielding slat of Comparative Example 1, and the general slat of Comparative Example 2 at each incident angle will be explained with reference to Fig. 9. Fig. 9 is a diagram showing the solar reflectance of slat 100 and the slats of the comparative examples.

[0042] 9, when the slat 100, Comparative Example 1, and Comparative Example 2 are light gray, the solar reflectance is 65.1% for the slat 100, 66.0% for Comparative Example 1, and 59.7% for Comparative Example 2. In this way, the slat 100 has a higher solar reflectance than the general slat of Comparative Example 2, and can improve the heat shielding performance.

[0043] (Effects of the First Embodiment) As described above, according to this embodiment, the slat surface is formed into an uneven surface by the coating film 120 consisting of the thermosetting resin layer 124 containing a design pigment for providing a surface color and a plurality of resin beads 122 dispersed therein, so that the slat 100 can be manufactured by the same processing steps as for a general slat that does not have a glare suppression effect, and the design of the slat 100 becomes close to that of a general slat. In addition, the uneven surface can diffusely reflect external light to suppress glare. Therefore, the design can be improved while preventing the glare phenomenon.

[0044] The average thickness of the coating film 120 is 30 μm or less, the average length of the resin beads 122 in the coating film thickness direction is 40 μm or less, and by making the size of at least some of the resin beads 122 larger than the average coating film thickness, the resin beads 122 larger than the coating film thickness are dispersed in the thermoplastic resin layer. This results in the formation of gentle irregularities on the slat surface 100a, which can eliminate design defects and improve the design. In addition, the uneven surface can diffuse and reflect external light, thereby suppressing glare.

[0045] In addition, the slat surface 100a has a specular gloss of 7 or less at 85 degrees as defined by JIS Z8741 (1997), which allows most of the external light to be diffusely reflected, thereby suppressing glare. In this way, the design can be improved while preventing the glare phenomenon.

[0046] In addition, by setting the regular reflectance of the slat surface 100a in the visible light range at incidence angles of 30 degrees and 60 degrees to 0.7% or less, almost all of the visible light, more than 99%, at each incidence angle is absorbed or diffusely reflected by the slat surface 100a, thereby making it possible to suppress glare regardless of the inclination angle of the slat 100.

[0047] Furthermore, by using a solar heat shielding pigment with high reflectivity in the near-infrared region as the design pigment, slats that combine glare suppression and heat shielding properties can be obtained through a process similar to that of general slat processing.

[0048] Furthermore, by setting the ratio of the resin beads 122 in the coating film 120 to 5 to 15%, appropriate irregularities can be formed on the slat surface, allowing external light to be diffusely reflected.

[0049] Furthermore, by setting the average particle size of the resin beads 122 to 20 to 35 μm, the coating film 120 forms gentle irregularities on the slat surface 100a.

[0050] Furthermore, the horizontal blind 10 can be designed with improved design while preventing the glare phenomenon, and the multiple slats 100 allow external light reflected by the upper surface of one adjacent slat to be reflected also by the lower surface of the other slat, further increasing the proportion of diffuse reflection, thereby reliably suppressing glare and eliminating discomfort for residents in the space in which the horizontal blind 10 is installed.

[0051] Second embodiment A vertical blind 20 according to a second embodiment will be described with reference to Fig. 10. Fig. 10 is a perspective view of the vertical blind 20 according to this embodiment. The vertical blind 20 of this embodiment differs from the first embodiment in that it has a louver 300. In this embodiment, the differences from the first embodiment will be mainly described. Components having substantially the same functional configurations will be denoted by the same reference numerals to avoid redundant description.

[0052] As shown in Figure 10, the vertical blind 20 of this embodiment is configured to include a head rail 22, a louver (slat) 300 suspended below the head rail 22, and an operating unit 24 that can operate the movement and rotation of the louver 300 in the longitudinal direction of the head rail 22.

[0053] The louver 300, like the slat 100 of the first embodiment, is configured to have a coating film made of a thermosetting resin layer in which a plurality of resin beads are dispersed and which contains a design pigment for providing a surface color.

[0054] (Effects of the second embodiment) As described above, according to this embodiment, the louver 300 and the vertical blind 20 including the louver 300 have the same effects as the slat 100 and the horizontal blind 10 of the first embodiment.

[0055] (Third embodiment) A horizontal blind according to a third embodiment will be described with reference to Fig. 11. Fig. 11 is a diagram for explaining a slat 400 of a horizontal blind according to this embodiment, (a) being a flow chart showing the processing steps of the slat 400, and (b) being a partial cross-sectional view of the slat 400. The horizontal blind according to this embodiment differs from the first embodiment in the configuration of the slat 400. In this embodiment, the differences from the first embodiment will be mainly described. Components having substantially the same functional configuration will be denoted by the same reference numerals to avoid redundant description.

[0056] In the slat 400 of this embodiment, the uneven surface formed on the slat surface is formed by scraping off the surface of the coating film 420 by blasting with sand particles. The processing process of the slat 400 will be described with reference to Fig. 11(a).

[0057] First, a thermosetting resin for forming the coating film 420 is applied to the slat base material 410 (step 100). Next, the thermosetting resin is baked onto the slat base material 410 (step 110). Next, the coating film 420 is formed by cooling (step 120). Next, the coating film 420 is subjected to a sandblasting process using fine sand particles to scrape off the surface of the coating film 420 (step 130). Then, as shown in FIG. 11(b), irregularities 420a are formed on the surface of the coating film 420 (step 140). Next, the slat base material 410 is roll-formed (step 150). In this manner, the slat 400 having the coating film 420 with the irregularities 420a as shown in FIG. 11(b) is formed (step 160).

[0058] (Effects of the third embodiment) As described above, according to this embodiment, the slat 400 and the horizontal blind including the same have the same effects as the slat 100 and the horizontal blind 10 of the first embodiment.

[0059] (Fourth embodiment) A horizontal blind according to a fourth embodiment will be described with reference to Fig. 12. Fig. 12 is a diagram for explaining a slat 500 of a horizontal blind according to this embodiment, (a) being a flow chart showing the processing steps of the slat 500, and (b) being a partial cross-sectional view of the slat 500. The horizontal blind according to this embodiment differs from the first embodiment in the configuration of the slat 500. In this embodiment, the differences from the first embodiment will be mainly described. Components having substantially the same functional configuration will be denoted by the same reference numerals to avoid redundant description.

[0060] In the slat 500 of this embodiment, the uneven surface formed on the slat surface is formed by deforming the surface of the coating film 520 during molding by roll forming using a roll (forming roll) having unevenness. The processing process of the slat 500 will be described with reference to Fig. 12(a).

[0061] First, a thermosetting resin for forming a coating film 520 is applied to a slat base material 510 (step 200). Next, the thermosetting resin is baked onto the slat base material 510 (step 210). Next, the coating film 520 is formed by cooling (step 220). Next, the slat base material 510 with the coating film 520 applied thereto is subjected to roll forming using a roll having fine irregularities (step 230). Then, as shown in FIG. 12(b), irregularities 520a are formed on the surface of the coating film 520 (step 240). In this manner, the slat 500 having the coating film 520 with the irregularities 520a as shown in FIG. 12(b) is formed (step 250).

[0062] (Effects of the fourth embodiment) As described above, according to this embodiment, the slat 500 and the horizontal blind including the same have the same effects as the slat 100 and the horizontal blind 10 of the first embodiment.

[0063] Fifth embodiment A horizontal blind according to the fifth embodiment will be described with reference to Fig. 13. Fig. 13 is a diagram for explaining a slat 600 of the horizontal blind according to this embodiment, (a) being a flow chart showing the processing steps of the slat 600, and (b) being a partial cross-sectional view of the slat 600. The horizontal blind according to this embodiment differs from the first embodiment in the configuration of the slat 600. In this embodiment, the differences from the first embodiment will be mainly described. Components having substantially the same functional configuration will be denoted by the same reference numerals to avoid redundant description.

[0064] In the slat 600 of this embodiment, the uneven surface formed on the slat surface is formed by holes that are formed when the substance contained in the thermosetting resin that constitutes the thermosetting resin layer disappears during baking.

[0065] The process of manufacturing the slat 600 will be described with reference to FIG. The thermosetting resin applied to the slat base material 610 contains a solid wax (substance) WX. The contained solid wax WX is a substance that is burned away by baking. In this embodiment, the contained substance is the solid wax WX, but it may be a chemical or foam. The above-mentioned thermosetting resin for forming the coating film 620 is applied to the slat base material 610 (step 300). 13(b), the thermosetting resin is baked onto the slat base material 610. At this time, the solid wax WX contained therein is burned away (step 310). 13(c), holes 620b are formed in the coating film 620 where the solid wax WX has disappeared, resulting in the formation of irregularities 620a on the slat surface (step 320). Next, the coating film 620 is formed by cooling (step 330). Next, the slat base material 610 is subjected to roll forming (step 340). In this manner, the slat 600 having the coating film 620 with the irregularities 620a as shown in FIG. 13(c) is formed (step 350).

[0066] (Effects of the Fifth Embodiment) As described above, according to this embodiment, the slat 600 and the horizontal blind including the same have the same effects as the slat 100 and the horizontal blind 10 of the first embodiment.

[0067] Sixth embodiment A horizontal blind according to the sixth embodiment will be described with reference to Fig. 14. Fig. 14 is a diagram for explaining a slat 700 of the horizontal blind according to this embodiment, (a) being a flow chart showing the processing steps of the slat 700, and (b) being a partial cross-sectional view of the slat 700. The horizontal blind according to this embodiment differs from the first embodiment in the configuration of the slat 700. In this embodiment, the differences from the first embodiment will be mainly described. Components having substantially the same functional configuration will be denoted by the same reference numerals to avoid redundant description.

[0068] In the slat 700 of this embodiment, the uneven surface formed on the slat surface is formed by forming a coating film 720 on the surface of an embossed slat base material 710. The processing steps of the slat 700 will be described with reference to Fig. 14(a).

[0069] First, the slat base material 710 is embossed (step 400). Next, a thermosetting resin is applied to the slat base material 710 to form the coating film 720 (step 410). As a result, irregularities 720a are formed on the slat surface (step 420). Next, the thermosetting resin is baked onto the slat base material 710 (step 430). Next, the coating film 720 is formed by cooling (step 440). Next, the slat base material 710 is subjected to roll forming (step 450). In this manner, as shown in FIG. 14(b), the slat 700 having the coating film 720 with the irregularities 720a is formed (step 460).

[0070] (Effects of the sixth embodiment) As described above, according to this embodiment, the slat 700 and the horizontal blind including the same have the same effects as the slat 100 and the horizontal blind 10 of the first embodiment.

[0071] Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such an example. It is clear that a person skilled in the art can think of various modified or altered examples within the scope of the claims, and it is understood that such examples also naturally belong to the technical scope of the present invention.

[0072] In the first embodiment, the slat surface 100a has a specular gloss of 7 or less at 85 degrees as defined by "JIS Z8741 (1997)", but the present invention is not limited to this example. As long as it can prevent the glare phenomenon and improve the design, it can be designed arbitrarily. The same applies to the second to sixth embodiments.

[0073] In the first embodiment, the regular reflectance of the slat surface 100a in the visible light region at incident angles of 30 degrees and 60 degrees is set to 0.7% or less, but the present invention is not limited to this example. As long as the design can be improved while preventing the glare phenomenon, it can be designed arbitrarily. The same applies to the second to sixth embodiments.

[0074] In the first embodiment, the design pigment is a solar heat shielding pigment with high reflectivity in the near infrared region, but the present invention is not limited to this example. As long as it can improve design while preventing the glare phenomenon, it can be designed arbitrarily. The same applies to the second to sixth embodiments.

[0075] For example, in the first embodiment, the average thickness of the coating film 120 is 30 μm or less, the average length of the resin beads 122 in the coating film thickness direction is 40 μm or less, and the size of at least some of the resin beads 122 is made larger than the average coating film thickness, so that the coating film 120 forms a gently uneven surface on the slat surface 100a. However, the present invention is not limited to this example. As long as the design can be improved while preventing the glare phenomenon, any design can be used. The same applies to the second embodiment.

[0076] In the first embodiment, the ratio of the resin beads 122 in the coating film 120 is set to 5 to 15%, but the present invention is not limited to this example. As long as the design can be improved while preventing the glare phenomenon, it can be designed arbitrarily. The same applies to the second embodiment.

[0077] In the first embodiment, the average particle size of the resin beads 122 is set to 20 to 35 μm, but the present invention is not limited to this example. As long as the design can be improved while preventing the glare phenomenon, the resin beads 122 can be designed arbitrarily. The same applies to the second embodiment. [Explanation of symbols]

[0078] 10 Horizontal blinds 12 Head Box 14 Ladder Code 16 Bottom Rail 18 Lifting cord 19 Control section 20 Vertical Blinds 22 Head rail 24 Control section 100 Slats 100a slat surface 110, 410, 510, 610, 710 Slat base material 120, 420, 520, 620, 720 coating 122 Resin beads 124 Thermosetting resin layer 200 light source 210 Receiver 420a, 520a, 620a, 720a uneven 620b hole NL incident light SL Specular reflection light KL Diffuse WX Solid wax (substance)

Claims

1. A slat used in a blind that can be installed in an opening, A slat base material made of a metal material; A coating film formed on the surface of the slat base material and consisting of a thermosetting resin layer containing a design pigment for presenting a surface color; having The coating film has a gentle uneven surface with an average coating thickness of 30 μm or less on the slat surface, and the slat surface has a specular gloss of 7 or less at 85 degrees as defined in "JIS Z8741 (1997)"; A slat, characterized in that light impinging on the slat surface is diffusely reflected on the slat surface.

2. 2. The slat according to claim 1, wherein the specular reflectance of the slat surface in the visible light region at incident angles of 30 degrees and 60 degrees is 0.7% or less.

3. The slat according to claim 1 or 2, characterized in that the design pigment is a solar heat shielding pigment having high reflectance in the near infrared region.

4. A slat according to any one of claims 1 to 3, characterized in that the coating comprises a plurality of resin beads dispersed on the surface of the slat substrate.

5. The resin beads have an average length in the coating film thickness direction of 40 μm or less, 5. The slat according to claim 4, wherein the size of at least some of the resin beads is larger than the average coating thickness.

6. The slat according to claim 4 or 5, characterized in that the average particle size of the resin beads is 20 to 35 μm.

7. The slat according to any one of claims 1 to 3, wherein the uneven surface is formed by scraping off the surface of the coating film by blasting with sand particles.

8. The slat according to any one of claims 1 to 3, wherein the uneven surface is formed by deforming the surface of the coating film during molding using a forming roll having unevenness.

9. The thermosetting resin constituting the thermosetting resin layer contains a substance that disappears during baking, 4. The slat according to claim 1, wherein the uneven surface is formed by holes formed when the material disappears during baking.

10. 4. A slat according to claim 1, wherein the uneven surface is formed by forming a coating film on the surface of the slat base material which has been embossed.

11. A blind using the slat according to any one of claims 1 to 10.

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