Heat-shielding sheet

Abstract

To provide a heat shielding sheet which can suppress generation of dew condensation in a season of a large temperature difference and in a season of high humidity, and which includes incombustibility.SOLUTION: A heat shielding sheet 10 includes: a glass fiber net 1; aluminum alloy foils 3, 3 adhered on both outer surfaces 1a, 1a of the glass fiber net 1 respectively via polyethylene resin adhesive layers 2, 2; a synthetic resin paint layer 4 for covering an outer surface 3a of the aluminum alloy foil 3; and a plurality of vent holes 5 penetrating the glass fiber net 1, the polyethylene resin adhesive layers 2, 2, the aluminum alloy foils 3, 3, and the synthetic resin paint layers 4, 4.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a heat shield sheet used as a heat shield for roof portions of buildings with folded-plate roofs, buildings with slate roofs, and the like. [Background technology]

[0002] In order to reduce the air conditioning energy used in buildings such as those with folded-plate roofs or slate roofs, heat-shielding sheets are installed on the underside of the roofing materials that make up the building. Prior art related to the present invention includes, for example, the "Roof heat-shielding structure and method for forming the same" described in Patent Document 1.

[0003] The roof heat-shielding structure described in Patent Document 1 has a plurality of support members arranged side by side on the upper surface of the beams inside the folded-plate roof, which is constructed of a plurality of folded plates attached to the beams and spanned between a plurality of parallel-arranged beams in a direction crossing the beam arrangement direction, and a sheet-like heat-shielding member, each consisting of one piece placed around the periphery on the beams and support members, each fixed to the support members with a space secured between them and the folded plates, which blocks radiant heat from the folded plates into the interior of the building.

[0004] The roof heat-shielding structure described in Patent Document 1 has the effect of preventing heat from the hot roof from being transmitted to the inside of the building by blocking the radiant heat from the folded plates that form the roof with a sheet-like heat-shielding member.Another advantage is that the sheet-like heat-shielding member is not directly exposed to direct sunlight, so there is no need to consider weather resistance. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-155507 Summary of the Invention [Problem to be solved by the invention]

[0006] The roof heat-shielding structure described in Patent Document 1 has the excellent effects and advantages described above, but in seasons with large temperature differences or high humidity, condensation often occurs on the top and bottom surfaces of the heat-shielding sheet (sheet-like heat-shielding member) placed on the inside of the corrugated roof (inside the building) via a support member (underlayment).

[0007] Condensation that forms on the underside of the heat-shielding sheet gradually moves downward along the underside of the part of the heat-shielding sheet that is bent downward to form a convex curve due to the influence of gravity, and eventually turns into droplets and falls into the building.This causes various problems, such as various items stored inside the building becoming wet or submerged in water by the falling droplets.

[0008] Furthermore, the heat shielding sheet (sheet-like heat shielding member) constituting the roof heat shielding structure described in Patent Document 1 is not non-flammable, and therefore is inferior in terms of fire resistance.

[0009] Therefore, the problem that the present invention aims to solve is to provide a heat-shielding sheet that can suppress the occurrence of condensation in seasons with large temperature differences or high humidity, and that also has non-flammability. [Means for solving the problem]

[0010] The heat shield sheet according to the present invention is Fiberglass netting and Aluminum alloy foils attached to both outer surfaces of the glass fiber net via polyethylene resin-based adhesive layers, a synthetic resin-based paint layer covering the outer surface of the aluminum alloy foil; The sheet is characterized by comprising a plurality of ventilation holes (inner diameter 0.1 mm to 0.8 mm) that penetrate the glass fiber net, the polyethylene resin adhesive layer, the aluminum alloy foil, and the synthetic resin paint layer.

[0011] In the heat shield sheet, it is desirable that the spacing between adjacent air holes be 2 mm to 5 mm.

[0012] The heat shield sheet has a thickness of 0.200 mm to 0.232 mm. m It is desirable that: [Effects of the Invention]

[0013] The present invention can provide a heat shield sheet that can suppress the occurrence of condensation in seasons with large temperature differences or high humidity, and that also has non-flammability. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a partially omitted plan view showing a heat shield sheet according to an embodiment of the present invention. [Figure 2] 2 is an enlarged view of a region indicated by an arrow A in FIG. 1, with a portion thereof omitted. [Figure 3] FIG. 3 is a cross-sectional view taken along line BB in FIG. 2, with some parts omitted. DETAILED DESCRIPTION OF THE INVENTION

[0015] A heat shield sheet 10 according to an embodiment of the present invention will now be described with reference to Figures 1 to 3. As shown in Figure 3, the heat shield sheet 10 according to this embodiment comprises a glass fiber net 1, aluminum alloy foils 3, 3 attached to both outer surfaces 1a, 1a of the glass fiber net 1 via polyethylene resin-based adhesive layers 2, 2, respectively, synthetic resin-based paint layers 4, 4 covering the outer surfaces 3a, 3a of the aluminum alloy foils 3, 3, and a plurality of ventilation holes 5 penetrating the glass fiber net 1, the polyethylene resin-based adhesive layers 2, 2, the aluminum alloy foils 3, 3 and the synthetic resin-based paint layers 4, 4.

[0016] The thickness 10t of the heat shield sheet 10 is set to 0.226 mm, but is not limited to this, and the thickness 10t may be set to 0.200 mm to 0.232 mm. m It can be set to an appropriate value within the range.

[0017] 1 and 2, in the heat shield sheet 10, the shortest spacing 5b between adjacent ventilation holes 5,5 is 2.4 mm and the longest spacing 5c ​​is 3.5 mm, but these are not limited to these and can be set to any appropriate value within the range of 2 to 5 mm. Note that the spacing between the ventilation holes 5,5 refers to the center-to-center distance between the ventilation holes 5,5.

[0018] As shown in FIG. 2, the inner diameter 5a of the ventilation hole 5 is set to 0.4 mm, but this is not limited to this and the inner diameter can be set to an appropriate value within the range of 0.1 mm to 0.8 mm.

[0019] 1 and 2, the heat shield sheet 10 has a plurality of ventilation holes 5 over its entire surface, which provides excellent breathability and moisture permeability. Therefore, condensation on the heat shield sheet 10 can be suppressed even in seasons with large temperature differences or high humidity.

[0020] As shown in Figure 3, the heat-shielding sheet 10 has a structure in which aluminum alloy foils 3, 3 are attached to both outer surfaces 1a, 1a of a glass fiber net 1, so the heat-shielding sheet 10 has double-sided reflectivity (radiant heat reflectivity) and exhibits excellent heat-shielding properties.

[0021] Furthermore, since the glass fiber net 1 is disposed in the center of the heat shield sheet 10 in the thickness direction 10t, the sheet is also non-flammable and exhibits excellent fire resistance. Note that the non-flammable property means a level of non-flammability that can pass the non-flammability test established by the Ministry of Land, Infrastructure, Transport and Tourism.

[0022] Furthermore, as shown in Figure 3, the cross section of the heat shield sheet 10 has a symmetrical structure with the glass fiber net 1 in between, so the heat shield sheet 10 can be used (stretched) without distinguishing between the front and back, making it easy to install.

[0023] Furthermore, as shown in Figure 3, both outer surfaces of the heat shielding sheet 10 are coated with synthetic resin-based paint layers 4, 4, which provide excellent insulation, so that after installation, the heat shielding sheet 10 is less likely to be corroded electrically even if it comes into contact with the metal materials that make up the building.

[0024] It should be noted that the heat shielding sheet 10 described based on Figures 1 to 3 is an example of a heat shielding sheet according to the present invention, and the heat shielding sheet according to the present invention is not limited to the heat shielding sheet 10 described above. [Industrial Applicability]

[0025] The present invention can be widely used in industrial fields such as the building and construction industries. [Explanation of symbols]

[0026] 1. Fiberglass net 1a,3a External surface 2 Polyethylene resin adhesive layer 3. Aluminum alloy foil 4 Synthetic resin paint layer 5. Ventilation holes 5a inner diameter 5b Minimum spacing 5c Maximum spacing

Claims

[Claim 1] Fiberglass netting and Aluminum alloy foils attached to both outer surfaces of the glass fiber net via polyethylene resin-based adhesive layers, a synthetic resin-based paint layer covering the outer surface of each of the aluminum alloy foils; a plurality of ventilation holes (inner diameter 0.1 mm to 0.8 mm) penetrating the glass fiber net, the polyethylene resin-based adhesive layer, the aluminum alloy foil, and the synthetic resin-based paint layer; The arrangement interval between adjacent plural air vent holes is 2 mm to 5 mm, The thickness is 0.200 mm to 0.232 mm. Heat-shielding sheet.

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