JPH10205236A - Heat-insulating sheet for window glass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form an intermediate layer with sufficient adhesive surfaces and air layers easily, and to obtain a flat heat-insulating sheet being difficult to be peeled and having an excellent heat-insulating effect by uniformly forming circular through- holes on the intermediate layer of a laminated film in a penetrating manner. SOLUTION: Circular through-holes 3 are formed uniformly on a crystal-clear polyester film in a penetrating manner to form an intermediate layer 1, and surface layers 2, 2 being thinner than the intermediate layer 1 and having the same quality as the intermediate layer 1 are bonded with both surfaces of the intermediate layer 1 with adhesives. Since there are sufficient adhesive surfaces in the intermediate layer 1, a flat laminated sheet being difficult to be peeled is acquired. The surface layer 2 of one surface is coated with pressure-sensitive adhesives 4 and covered with release paper 5, and the heat-insulating sheet 10 is formed, and cut in the size of the glass of a window, and the release paper 5 is beforehand peeled partially on arbitrary one side. One side, from which the release paper 5 is torn off, in the heat-insulating sheet 10 is stuck on the inside of the window glass, from which dust is wiped off, and positioned, and the release paper 5 is peeled and pasted on the whole surface of the window glass. A higher heat-insulating effect is obtained by superposing the two intermediate layers 1 while displacing the places of the through-holes 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a heat insulating sheet which is attached to a window glass or the like to enhance heat insulating properties of the glass.

[0002]

2. Description of the Related Art In buildings such as ordinary houses and buildings, the heat insulating effect of windows and doors is regarded as important as a problem of dwelling and a problem of energy saving and environment. Therefore, there is an urgent need to introduce a double window structure and a double-glazed glass having high heat insulating properties. However, even if these can be introduced at the time of new construction, it will be a burden because existing houses have to rely on major repairs.

[0003] For this reason, various types of heat insulating sheets have been used, which are stretched over window glass to prevent heat radiation from the windows and to enhance the heat insulating property, because the stretching work is simple and the like. For example, there are a type in which a sheet is attached to a window using a suction disk, a type in which a sheet is stretched over a frame and attached as an outer frame of a window, and a type in which a sheet is attached to a window glass with double-sided tape. . However, in many cases, the space between the glass and the film is not completely sealed, so that the heat insulating effect is low.

On the other hand, a sheet having a sealed air layer or the like is separately provided. For example, some concave surface is formed on the sticking surface side of the transparent sheet, and by sticking such a concave surface to glass, the concave surface is covered with glass to form an air chamber, thereby obtaining a heat insulating effect. There is something. For example, in Japanese Patent Application Laid-Open No. Hei 7-42456, "heat insulating sheet for glass such as windows", a mesh-shaped spacer is provided on one surface of a transparent sheet in an integrated structure, and the spacer side is stretched on the glass surface. There are also various types in which a sealed air chamber or the like is provided in the sheet itself to insulate the sheet. For example, Shogan 5
Among the "air-insulated heat-insulating sheets to be attached to window glass" proposed in 6-149792, there is a heat-insulating sheet in which a transparent film is polymerized and adhered to both surfaces of an uneven surface film to form an independent air chamber. It has been described.

[0005]

However, it is not easy to manufacture a heat insulating sheet using a mesh-like spacer, and if the stretched surface is a mesh-like shape, the adhesion area to glass is insufficient, so that a reliable adhesion can be achieved. Have difficulty. In addition, a mesh-like spacer or an uneven film requires a considerable amount of time to manufacture itself. In addition, in the case of a heat-insulating sheet in which a transparent film is polymerized and adhered to both sides of a sheet using an uneven film, it is difficult to maintain the flatness of the sheet surface, and the surface becomes uneven. Furthermore, due to the shape of the mesh-like spacers and the uneven film, it is difficult to reliably bond the heat insulating sheets together, and there are examples in which the laminates peel off with age.

[0006] In view of the above circumstances, it is an object of the present invention to provide a kind of heat insulating sheet having a closed air chamber, which is easy to manufacture, stable in quality over time, and flat. An object of the present invention is to provide a heat insulating sheet for a window glass, which can be formed into a simple sheet and has an excellent aesthetic feeling when adhered to a window glass and has a sufficient heat insulating effect.

[0007]

According to the present invention, a heat insulating sheet is formed by laminating at least three films.
At this time, the intermediate layer sandwiched between the front and back surface layers was laminated using a film having a through hole. When the heat insulating sheet is formed by laminating four or more films and the intermediate layer has two or more layers, even if the through holes are formed in all of the two or more layers, the through holes are formed in some of the layers. You may. When two or more layers are provided, the positions of the through holes in each layer may be aligned or may be shifted. The material of the film may be a synthetic resin or any other material. The through hole may be circular, but may be rectangular, square, rhombic, oval, or any other shape. The distribution of the through-holes may or may not be uniform. The through hole may be formed by punching, but may be formed by molding, melting or fusing, or any other method.

[0008] Such a heat insulating sheet has a large number of air chambers formed by through-holes, so that the intermediate layer forms an air layer, thereby improving heat insulating properties.

Further, a through-hole may be provided in the foamed film and used as an intermediate layer. Thereby, the heat insulation is further enhanced by the air chamber formed by the through holes and the foamed bubbles.

The above-mentioned various heat-insulating sheets may be coated with a pressure-sensitive adhesive for application together with release paper, or a light-shielding film may be used as a surface layer.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 of the heat insulating sheet according to claim 1 of the present invention will be described. As shown in FIGS. 1 and 2, the heat insulating sheet 10 has three colorless and transparent polyester films adhered with an adhesive (not shown), and surface layers 2 and 2 are laminated on both surfaces of the intermediate layer 1. The polyester film forming the intermediate layer 1 has circular through holes 3 evenly penetrated therein and is thicker than the polyester films forming the surface layers 2 and 2. The heat-insulating sheet 10 is coated with an adhesive 4 on the sticking surface side and covered with a release paper 5.

Such a heat insulating sheet 10 is formed in the size of a window glass (not shown), and the release paper 5 is partially peeled off at any one side of the heat insulating sheet 10 when it is adhered. Then, the one side from which the release paper 5 has been peeled off is adhered to the inside of the window glass from which dust has been wiped off, and a sheet 10 is attached.
May be positioned, and then adhered to the entire surface of the window glass. In this way, an air layer is formed inside the window glass, and since this air layer is a collection of individually closed air chambers, convection does not occur, and a high heat insulating effect is obtained. Can be

FIG. 3 shows another embodiment 2 of the heat insulating sheet 20 according to claim 1, wherein the intermediate layer 1 is formed by laminating two polyester films 1a, 1a. The polyester films of the surface layers 2 and 2 are laminated on this, and the polyester film is laminated on four layers in total. The two polyester films 1a and 1a of the intermediate layer 1 have circular through-holes 3 of the same size penetrating therethrough, but are laminated with the positions of the through-holes 3 shifted. In this way, even if the thickness of the intermediate layer 1 is the same, the heat insulating effect is enhanced as compared with the case where the intermediate layer is formed of one film.

A third embodiment of the heat insulating sheet 30 according to the second aspect of the present invention will be described. FIG. 4 shows that the heat insulating sheet 30 is substantially the same as that of the first embodiment, and is composed of three layers of films. The difference lies in the intermediate layer 1, in which a polyester foam film is used, and through-holes 3 are penetrated therethrough. When such a foamed film is used, the effect of improving the heat insulating property of the film itself by foaming can also be obtained. Even if the film has the same thickness, a small amount of material such as a synthetic resin may be used according to the foamed film. In addition, it is free to use such a foamed film for the surface layers 2 and 2, and the heat insulating effect is further enhanced.

[0015] The material of the film is not limited to polyester, but may be polyethylene, or any other material as long as it is suitable for the purpose of the present application. Also, the foam film may be a polyethylene foam film, or any other material.

[0016]

As described above, according to the first aspect of the present invention, the film used for the intermediate layer is easily formed.
Finally, the manufacture of the heat insulating sheet is also facilitated. In addition, since a sufficient adhesive surface is secured on the film of the intermediate layer, lamination is ensured, and the film does not peel off even with the passage of time. In addition, since it can be formed into a flat sheet without a bumpy layer on the surface of the heat insulating sheet, it has an excellent aesthetic feeling when affixed to a window glass, and a superior heat insulating effect is obtained by the air layer formed in the intermediate layer. .

According to the second aspect of the present invention, since the through-holes are provided in the foamed film, the heat insulating effect of the heat insulating sheet using the through holes is further improved. Further, by using a foamed film, a small amount of material such as a synthetic resin may be used, which is useful for reducing material costs.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a cross section of a heat insulating sheet according to a first embodiment.

FIG. 2 is a diagram illustrating a state where the heat insulating sheet of FIG. 1 is peeled off.

FIG. 3 is a diagram illustrating a cross section of a heat insulating sheet according to a second embodiment.

FIG. 4 is a diagram illustrating a cross section of a heat insulating sheet according to a third embodiment.

[Explanation of symbols]

 10, 20, 30 Thermal insulation sheet 1 Middle layer 2 Surface layer 3 Through hole 4 Adhesive 5 Release paper

Claims (2)

[Claims] 1. A sheet to be attached to a window glass,
A heat insulating sheet for a window glass, wherein at least three layers are laminated using a film having a through hole as an intermediate layer. 2. The heat insulating sheet for a window glass according to claim 1, wherein the film used for the intermediate layer is a foamed film.