JP6579213B2 - Interior building material sheet and daylighting system - Google Patents

Description

  The present invention relates to an interior building material sheet and a daylighting system.

In recent years, as part of efforts to reduce the emission intensity of indoor lighting and reduce the amount of carbon dioxide emission and power consumption, a daylighting device has been proposed that efficiently takes outside light incident on a window indoors. For example, Patent Document 1 includes a structural layer having a plurality of reflecting surfaces, the lengths of one-dimensional direction, the arrangement pitch, and the incident angle of incident light satisfying a predetermined relationship. The optical element and the illumination device that improve the light capturing efficiency and cope with the reduction in the thickness of the daylighting device.

JP 2012-38626 A

  Most of the light taken indoors by the daylight is provided on the ceiling surface or wall surface and irradiated on the wallpaper. On the other hand, the conventional wallpaper has a total light reflectivity as low as 90% or less, and the light incident on the wallpaper cannot be diffused and reflected efficiently indoors. The light could not be used effectively. In addition, weather resistance is required for wallpaper and the like.

  The present invention has been made in view of the above circumstances, and has as its main object to provide an interior building material sheet and a daylighting system that efficiently diffuse and reflect the daylight to brighten the interior and have weather resistance. To do.

  The gist of the first invention that solves the above problem is an interior building material sheet that diffuses and reflects light collected from the outside to brighten the interior, has hydrolysis resistance, and has fine bubbles. It has a reflective base material including a white polyethylene terephthalate film having a void structure and a light diffusive uneven surface on the light incident side of the reflective base material.

  The gist of the second invention that solves the above problem is that, in the interior building material sheet according to the first invention, the light is incident from the concave and convex surface on the side opposite to the concave and convex surface side of the reflective base material. A reflection layer that reflects light is provided.

  The gist of the third invention for solving the above problems is an interior building material sheet that diffuses and reflects light, and is a white polyethylene terephthalate film having a void structure having hydrolysis resistance and fine bubbles. A reflective base material, an ionizing radiation curable resin layer formed on the reflective base material, and a light diffusive uneven surface on the light incident side of the ionizing radiation curable resin layer, It is characterized by having.

  The gist of the fourth invention that solves the above problem is that, in the interior building material sheet according to the third invention, on the side opposite to the side on which the ionizing radiation curable resin layer of the reflective substrate is formed. A reflection layer for reflecting light incident from the uneven surface is provided.

  The gist of the fifth invention for solving the above problem is that the reflective base material has translucency.

  The gist of the sixth invention for solving the above problems is a daylighting member for daylighting outdoor light indoors at the boundary between the outdoors and indoors, and the first to the above-mentioned first to diffusively reflects light collected by the daylighting members indoors. A lighting system comprising: the interior building material sheet according to any one of the fifth invention. The gist of the seventh invention for solving the above problem is that the daylighting member is composed of a base portion and a louver portion arranged inside the base portion, and the louver portion extends linearly. A daylighting system that is formed and provided in a plurality at a predetermined pitch in a direction orthogonal to the extending direction, and the refractive index of the louver part is smaller than the refractive index of the base part.

  According to the present invention, it is possible to provide an interior building material sheet and a daylighting system that have weather resistance and are highly diffusive.

It is the schematic of the lighting system of this invention. It is a schematic sectional drawing which shows one embodiment of the interior building material sheet | seat of this invention. It is a schematic sectional drawing which shows the other embodiment of the interior building material sheet | seat of this invention. It is a schematic sectional drawing which shows the other embodiment of the interior building material sheet | seat of this invention. It is a schematic sectional drawing which shows one embodiment of the lighting member which comprises the lighting system of this invention.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated based on FIGS.

  FIG. 1 is a schematic view showing a daylighting system provided with an interior building material sheet of the present invention.

  As shown in FIG. 1, the sunlight from the outside of the house HS is guided toward the indoor ceiling CE by the daylighting member 10 provided on the window WD at the boundary between the outdoor and indoor, and the interior provided on the ceiling CE. It is diffusely reflected by the building material sheet 1 and further diffused and reflected by the interior building material sheet 1 provided on the indoor wall WL to brighten the interior.

  FIG. 2 is a cross-sectional view showing an embodiment of the interior building material sheet of the present invention.

  As shown in FIG. 2, the interior building material sheet 1 includes a reflective base material 2 having hydrolysis resistance and a light diffusive uneven surface 3 on the light incident side of the reflective base material 2.

The interior building material sheet 1 is installed on the indoor ceiling or wall on the opposite side to the light diffusing uneven surface 3 side, and diffuses and reflects light collected from outside light to brighten the interior.
<Reflective substrate>
The reflective substrate 2 can be used as long as it has light diffusion reflectivity, has hydrolysis resistance, and has a processing suitability and a construction suitability as an interior building material sheet.

  As countermeasures against deterioration due to hydrolysis of plastic materials under high humidity, various hydrolysis-resistant films obtained by changing the chemical structure, including additives in the composition, and the like have been put into practical use. As the material of the reflective substrate 2, those hydrolysis resistant films can be used.

  Preferably, polyethylene terephthalate is used as the material of the reflective substrate 2, and polyethylene terephthalate (PET) is formed into a film by a melt extrusion molding method, cooled, biaxially stretched and oriented, and crystallized by heat setting. In other words, a white polyethylene terephthalate film having a void structure having fine bubbles is used. Excellent light diffuse reflection effect.

  Among the white polyethylene terephthalate films having the void structure, those having hydrolysis resistance include Shine Beam Q2211 and 3215 manufactured by Toyobo Co., Ltd., Lumirror MX70 and MX11 manufactured by Toray Industries, Inc., and Teijin Tetron Film manufactured by Teijin Limited. U2, VW, or the like can be used.

  Said hydrolysis-resistant film has moisture resistance, heat resistance and yellowing resistance.

The thickness of the reflective substrate 2 is not particularly limited, but is usually about 20 to 200 μm, preferably 30 to 150 μm from the viewpoint of durability and versatility.
<Uneven surface>
The uneven surface 3 is provided directly (see FIG. 2) or indirectly (see FIG. 3 described later) on the reflective substrate 2, and has light diffusibility. In FIG. 2, the concavo-convex surface 3 is provided on the light incident side of the reflective substrate 2.

  As a method for forming the concavo-convex surface 3, a method of embossing the surface of the reflective substrate 2 with a mold, a method of plasma-treating the surface of the reflective substrate 2, or the like can be employed.

FIG. 3 is a cross-sectional view showing another embodiment of the interior building material sheet of the present invention.
As shown in FIG. 3, the interior building material sheet 1 includes an ionizing radiation curable resin layer 4 cured on the reflective base material 2 and a light diffusibility on the light incident side of the ionizing radiation curable resin layer 4. And the uneven surface 3.

  The interior building material sheet 1 is installed on the indoor ceiling or wall on the side opposite to the light diffusive uneven surface 3 side, and diffuses and reflects light taken from outside light to brighten the interior.

Further, the ionizing radiation curable resin layer 4 cured on the reflective substrate 2 improves durability, weather resistance, and abrasion resistance as an interior material.
<Ionizing radiation curable resin layer>
The ionizing radiation curable resin layer 4 is formed and cured on the reflective base material 2 in the interior building material sheet 1 of FIG. 3, and has an uneven surface 3 on the surface.

  The material of the ionizing radiation curable resin layer 4 has an energy quantum capable of crosslinking and polymerizing in an electromagnetic wave or a charged particle beam, that is, ionizing which is crosslinked and cured by irradiation with ultraviolet rays or an electron beam. A radiation curable resin is used.

  As a material for the ionizing radiation curable resin, it can be appropriately selected from polymerizable monomers, polymerizable oligomers, or prepolymers commonly used as ionizing radiation curable resins. Typically, a (meth) acrylate monomer having a radical polymerizable unsaturated group in the molecule is suitable as the polymerizable monomer, and among them, a polyfunctional (meth) acrylate is preferable. Here, “(meth) acrylate” means “acrylate or methacrylate”, and other similar ones have the same meaning. The polyfunctional (meth) acrylate is not particularly limited as long as it is a (meth) acrylate having two or more ethylenically unsaturated bonds in the molecule. These polyfunctional (meth) acrylates may be used singly or in combination of two or more.

  The uneven surface 3 is provided on the side on which the light of the ionizing radiation curable resin layer 4 enters. Examples of the method for forming the uneven surface 3 include a method of embossing the surface of the ionizing radiation curable resin layer 4 with a mold, a method of plasma-treating the surface of the ionizing radiation curable resin layer 4, and an ionizing radiation curable resin. A method of allowing the layer 4 to contain particles such as beads can be employed.

  FIG. 4 is a cross-sectional view showing another embodiment of the interior building material sheet of the present invention.

  As shown in FIG. 4, the interior building material sheet 1 has a light diffusive concavo-convex surface 3 on the reflective base material 2 and on the light incident side of the reflective base material 2. The reflective layer 5 is provided on the side opposite to the uneven surface side.

  The interior building material sheet 1 is installed on the indoor ceiling or wall on the side opposite to the light diffusive uneven surface 3 side, and diffuses and reflects light taken from outside light to brighten the interior.

Moreover, the reflective layer 5 provided on the side opposite to the uneven surface 3 side of the reflective substrate 2 reflects light incident from the uneven surface 3 when the reflective substrate 2 has translucency, Improve the diffuse reflectivity of the interior building material sheet 1.
<Reflective layer>
In the interior building material sheet 1 of FIG. 4, the reflective layer 5 is provided on the side opposite to the uneven surface 3 side of the reflective base material 2, as long as it reflects the light incident from the uneven surface 3.

  The reflective layer 5 is formed by depositing a metal such as gold, silver, copper, or aluminum as a metal thin film by a vapor deposition method or a sputtering method, or an ink in which a metal such as gold, silver, copper, or aluminum is mixed with a binder. A thick film formed by a method or a printing method can be used.

As the film thickness of the reflective layer 5, 0.05 to 0.2 μm is preferable in the case of the above thin film, and 0.2 to 200 μm is preferable in the case of the thick film. As another embodiment, the interior building material of the present invention Adhesive on the decorative sheet provided with an adhesive layer on the side opposite to the side where the uneven surface 3 of the sheet 1 is provided, and on the side opposite to the side where the uneven surface 3 of the interior building material sheet 1 is provided on the panel or gypsum board It is used as a decorative panel and a decorative board that are bonded together via an adhesive.

<Lighting system>
As long as the daylighting member 10 used in the daylighting system shown in FIG. 1 has a function of guiding light from the outside toward the indoor ceiling, a reflector, a prism, a lens, etc. are provided in a louver shape, and a daylighting device or the like. Can be used.

  FIG. 5 is a cross-sectional view showing an embodiment of the daylighting member 10.

  As shown in FIG. 5, the daylighting member 10 has a louver portion 7 formed in the base portion 6, and is formed so that the louver portion 7 extends linearly, and the extending direction is horizontal. Installed. A plurality of louver portions 7 are provided at a predetermined pitch in a direction (vertical direction) orthogonal to the extending direction.

  The louver portion 7 has a function of reflecting outdoor light on the upper surface thereof and guiding it toward the indoor ceiling.

  The louver portion 7 is formed by being connected to a pair of inclined surfaces having a surface facing upward (same as the upper side in FIG. 5 and other drawings) and a surface facing downward (same as the upper side in FIG. 5 and other drawings). In this embodiment, the cross-sectional shape is a trapezoid. In the daylighting member 10, the ability to bend the optical path of the incident light in the shape of an inclined surface functioning as a reflecting surface in the louver portion 7 is variously changed. Therefore, various shapes can be applied to the cross-sectional shape of the louver portion 7 depending on the purpose and performance.

  As a material of the louver part 7, a material made of a highly reflective material or a material made of a transparent resin material having a refractive index smaller than that of the base part 6 can be used. In the case of a structure made of a transparent resin material having a refractive index smaller than that of the base portion 6, outside light incident on an inclined surface facing upward of the louver portion 7 is incident at an angle larger than the critical angle. Total reflection on the slope. As a result, the optical path of incident light from the outside is bent and emitted toward the indoor ceiling. The transparent resin material may contain a white agent, a black agent, and other colorants, and the emitted light can be changed to scattered light and the design of the daylighting member 10 can be improved.

DESCRIPTION OF SYMBOLS 1 Interior building material sheet 2 Reflective base material 3 Uneven surface 4 Ionizing radiation curable resin layer 5 Reflective layer 6 Base part 7 Louver part 10 Daylighting member WD Window CE Ceiling WL Wall HS House

Claims (5)

An interior building material sheet that diffusely reflects light,
A reflective substrate having hydrolysis resistance and a thickness in the range of 30 to 150 μm ;
An ionizing radiation curable resin layer formed on the reflective substrate,
The ionizing radiation curable resin layer has a light diffusive uneven surface on the light incident side,
A reflective layer is provided on the side of the reflective substrate opposite to the uneven surface side;
The reflective base material can transmit light incident from the uneven surface toward the reflective layer, and can transmit light reflected by the reflective layer toward the uneven surface,
The reflective layer is an interior building material sheet capable of reflecting light incident from the uneven surface.   The interior building material sheet according to claim 1, wherein the reflective base material has translucency. Wherein the irregular surface of the ionizing radiation curable resin layer include those wherein the ionizing radiation-curable resin layer, the surface of the pre-Symbol ionizing radiation-curable resin layer is plasma treated, or beads to the ionizing radiation curable resin layer The interior building material sheet according to claim 1, wherein the interior building material sheet is one containing a particulate matter such as.   The interior building material sheet according to any one of claims 1 to 3, wherein the reflective base material is polyethylene terephthalate. A daylighting member provided at the boundary between the outdoors and indoors for daylighting outdoor light;
A lighting system comprising: the interior building material sheet according to any one of claims 1 to 4, wherein the interior building material sheet is provided indoors and diffuses and reflects light collected by the daylighting member.

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