Dew condensation water-absorbing sheet

Abstract

To provide a dew condensation water absorbing sheet capable of reducing a risk of lowering a room temperature.SOLUTION: The dew condensation water-absorbing sheet 10 according to the present invention is a dew condensation water-absorbing sheet 10 that is attached to an object such as a window glass and absorbs dew condensation from the object, and includes a heat insulating layer 120 made of a material having heat insulating properties and a water-absorbing layer 110 made of a material having water-absorbing properties and laminated on the heat insulating layer 120, in which a second heat insulating layer main surface 120b of the heat insulating layer 120 on a surface side not facing the water-absorbing layer 110 faces the object.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a dew absorbing sheet that is attached to an object such as a window pane. [Background technology]

[0002] Condensation that forms on windows and doors due to the temperature difference between indoors and outdoors has traditionally been a cause of mold and rust that contaminates indoor wallpaper, furniture, etc. Therefore, condensation absorbent tapes have been widely used, which are attached to glass windows, for example, to absorb the condensation that forms on the glass windows.

[0003] As an example of such a condensation and water-absorbing sheet, Patent Document 1 discloses a condensation and water-absorbing sheet that has an uneven portion on the upper end of the main body of the sheet made of nonwoven fabric such as polyester, polyurethane, nylon, etc., and is decorated with a pattern on the lower side, and is attached to the window glass with double-sided tape on the back side below the pattern.

[0004] In this type of condensation absorbent sheet, the backside of the uneven surface and pattern does not have an adhesive layer, so condensation flows down between the window glass and the uneven surface and is absorbed into the main body of the sheet. The absorbed moisture is said to evaporate from the uneven surface as the outside temperature rises during the day. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-126875 Summary of the Invention [Problem to be solved by the invention]

[0006] The dew absorbing sheets of the above-mentioned conventional technology have had the following problems: Conventional dew absorbing sheets use nonwoven fabric such as polyester for the main body of the sheet, but the heat capacity of the nonwoven fabric increases when it absorbs water, causing a drop in room temperature.

[0007] Therefore, a primary object of the present invention is to provide a condensation absorbent sheet that can reduce the risk of lowering room temperature. [Means for solving the problem]

[0008] The condensation absorbent sheet of the present invention is a condensation absorbent sheet that is attached to an object and absorbs condensation from the object, and comprises an insulating layer made of a material with insulating properties and a water absorption layer made of a material with water absorption properties laminated on the insulating layer, with the side of the insulating layer that does not face the water absorption layer facing the object. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a condensation absorbent sheet that can reduce the risk of lowering the room temperature.

[0010] The above and other objects, features, and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments of the present invention, which proceeds with reference to the accompanying drawings. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a perspective view showing a condensation absorbent sheet according to an embodiment of the present invention. [Figure 2] 1 is an exploded cross-sectional view showing a main part of a condensation absorbent sheet according to an embodiment of the present invention. [Figure 3] FIG. 10 is an exploded cross-sectional view showing a main part of a modified example of the condensation absorbent sheet according to the embodiment of the present invention. [Figure 4] FIG. 10 is an exploded cross-sectional view showing a main part of a modified example of the condensation absorbent sheet according to the embodiment of the present invention. [Figure 5]FIG. 10 is an exploded cross-sectional view showing a main part of a modified example of the condensation absorbent sheet according to the embodiment of the present invention. [Figure 6] FIG. 10 is a perspective view showing a modified example of the condensation absorbent sheet according to the embodiment of the present invention. [Figure 7] FIG. 10 is a perspective view showing a modified example of the condensation absorbent sheet according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, the dew condensation absorbent sheet of the present invention will be described in the present embodiment.

[0013] The following describes a condensation absorbent sheet according to an embodiment of the present invention. Fig. 1 is a perspective view showing a condensation absorbent sheet 10 according to an embodiment of the present invention. Fig. 2 is an exploded cross-sectional view showing a main part of the condensation absorbent sheet 10 according to an embodiment of the present invention.

[0014] In the following explanation, based on the Cartesian coordinates shown in each figure, the direction connecting the ceiling side and floor side of the room where the window glass 20 to which the condensation absorbent sheet 10 is attached is defined as the vertical direction (up-down direction), and the direction connecting the outdoor side and indoor side is defined as the thickness direction (stacking direction).

[0015] The condensation absorbent sheet 10 is a laminate of a water absorption layer 110 and a heat insulating layer 120, each of which has a flat outer shape and the same planar shape. A rectangular shape is preferable as the planar shape. It is preferable that the sheet has a width large enough to cover at least the width of the windowpane 20.

[0016] The water absorption layer 110 is made of a water-absorbent material. A preferred example of the water-absorbent material is a nonwoven fabric made of synthetic fibers, specifically, a nonwoven fabric made of any one of polyester, rayon, polypropylene, nylon, and polyethylene, or a blend of two or more of these fibers.

[0017] The thickness of the water absorbing layer 110 is preferably around 2.0 mm, but may be larger or smaller depending on the application.

[0018] The heat insulating layer 120 is made of a material having heat insulating properties. A preferable example of the material having heat insulating properties is foamed resin, specifically, foamed polyethylene. The heat insulating layer 120 preferably does not have a water absorption function.

[0019] The thickness of the insulating layer 120 is preferably around 2.0 mm, but may be larger or smaller depending on the application.

[0020] The thickness of each of the water absorbing layer 110 and the heat insulating layer 120 is preferably the same, but may vary depending on the application.

[0021] An adhesive layer 101 is provided between the water absorption layer 110 and the heat insulation layer 120 to bond them together. The adhesive layer 101 is formed by applying an adhesive to either the first water absorption layer main surface 110a or the first heat insulation layer main surface 120a of the water absorption layer 110. A hot melt adhesive is a preferred example of the adhesive.

[0022] In the water absorption layer 110, the second water absorption layer main surface 110b, which is the surface opposite to the first water absorption layer main surface 110a, which is the surface facing the adhesive layer 101, forms the surface exposed to the indoor side when the condensation water absorption sheet 10 is attached to the window glass 20.

[0023] In the heat insulating layer 120, the second heat insulating layer main surface 120b, which is the surface opposite to the first heat insulating layer main surface 120a, which is the surface facing the adhesive layer 101, forms the surface of the condensation and water absorbing sheet 10 that faces the window glass 20, and is laminated with an adhesive layer 102. The adhesive layer 102 is a layer for adhering the condensation and water absorbing sheet 10 to the window glass 20 by adhesion. The adhesive layer 102 is formed by applying an adhesive to the second heat insulating layer main surface 120b or by an adhesive sheet coated with an adhesive. An example of an adhesive is an acrylic adhesive.

[0024] The condensation water-absorbing sheet 10 is attached to the window glass 20, with one of two pairs of opposing sides of the rectangular shape aligned with the lower end of the window glass 20, i.e., the floor-side end, so that it is parallel to the contour of the window glass 20. The condensation water-supply sheet 10 is attached to cover at least the lower surface of the window glass 20. The condensation water-supply sheet 10 preferably has a length of at least one-quarter and at most one-third of the vertical length of the window glass 20. In this state, the upper end surface 110E of the water absorption layer 110 and the upper end surface 120E of the heat insulating layer 120 are exposed toward the ceiling. As a result, when condensation formed mainly on the upper surface of the window glass 20 flows down the surface as water droplets, the water droplets are blocked by the upper end surfaces 110E and 120E and are absorbed by the water absorption layer 110 via the upper end surface 110E. The absorbed moisture evaporates from the upper end surface 110E as the outside temperature rises during the day. Also, since the moisture accumulates as a cold air pocket at the bottom of the room, the condensation water supply sheet 10 can be attached to cover the lower surface of the window glass 20 to further enhance the heat insulating effect.

[0025] The condensation absorbent sheet 10 according to an embodiment of the present invention is a condensation absorbent sheet that is attached to an object such as a window glass 20 and absorbs condensation from the window glass 20, and comprises an insulating layer 120 made of a material with insulating properties, and a water absorption layer 110 made of a material with water absorption properties and laminated on the insulating layer 120, with the second insulating layer main surface 120b on the side of the insulating layer 120 that does not face the water absorption layer 110 facing the window glass 20.

[0026] The condensation absorbent sheet 10 according to the embodiment of the present invention has the following advantages due to its configuration: The heat insulating layer 120 faces the window glass 20 via the adhesive layer 102, preventing indoor heat from escaping through the window glass 20. As a result, even if the water absorbent layer 110 absorbs condensation and its heat capacity increases, the heat insulating layer 120 does not lose its heat insulating function, preventing the heat retention of the entire condensation absorbent sheet 10 from being impaired and reducing the risk of a drop in room temperature.

[0027] Therefore, the condensation water supply sheet shown in FIG. 1 can reduce the risk of lowering the room temperature.

[0028] Furthermore, since the second water absorption layer main surface 110b of the water absorption layer 110 is exposed to the indoor side, it is possible to absorb not only condensation from the window glass 20 but also moisture that condenses directly on the second water absorption layer main surface 110b.

[0029] A modified example of a condensation absorbent sheet according to an embodiment of the present invention will be described. Fig. 3 is an exploded cross-sectional view showing the main parts of a condensation absorbent sheet 11 according to a modified example of an embodiment of the present invention. However, the same reference numerals are used for the same or corresponding components as those in Fig. 2, and detailed descriptions of common components and operations will be omitted.

[0030] The condensation absorbent sheet 11 further includes a reflective layer 130 between the heat insulating layer 120 and the adhesive layer 102 of the condensation absorbent sheet 10 .

[0031] The reflective layer 130 is made of a metal material. A preferred example of the metal material is aluminum, specifically aluminum foil, because it is rust-resistant, inexpensive, and easy to process. When the reflective layer 130 is made of aluminum foil, the reflectance of radiant heat is preferably 95% or more, and more preferably 97% or more.

[0032] The reflective layer 130 and the heat insulating layer 120 are bonded together by adhesive via an adhesive layer 103. A first adhesive layer main surface 130a of the adhesive layer 130 faces the adhesive layer 120, and a second adhesive layer main surface 130b of the adhesive layer 130 faces the adhesive layer 103. The adhesive layer 103 is formed by applying a base material and an adhesive to the reflective layer 130. An example of the adhesive is preferably an epoxy-based adhesive.

[0033] The thickness of the reflective layer 130 is preferably around 1.2 μm, but may be larger or smaller depending on the application.

[0034] The reflective layer 130 may be formed as an aluminum vapor deposition layer 131 integrally formed with the thermal insulation layer 120 by vapor deposition onto the second thermal insulation layer main surface 120b of the thermal insulation layer 120, as shown in FIG.

[0035] The condensation absorbent sheet 11 according to the embodiment of the present invention has the following effect due to the inclusion of the reflective layer 130. When radiant heat generated indoors passes through the condensation absorbent sheet 11, most of it is reflected by the reflective layer 130, preventing the indoor heat from leaking to the outside through the condensation absorbent sheet 11 and the window glass 20. This further prevents the heat retention of the entire condensation absorbent sheet 10 from being impaired, even if the water-absorbing layer 110 absorbs condensation and its heat capacity increases, making it possible to reduce the risk of a drop in room temperature.

[0036] Therefore, the condensation water supply sheet 11 shown in FIG. 4 can further reduce the risk of lowering the room temperature.

[0037] In the above description, the reflective layer 130 is provided between the heat insulating layer 120 and the adhesive layer 102 of the condensation absorbent sheet 10, but it may also be provided between the heat insulating layer 120 and the water absorbing layer 110, as shown in Fig. 5. The reflective layer 130 shown in Fig. 5 is an aluminum vapor deposition layer 131 formed integrally with the water absorbing layer 110, but it may also be bonded by adhesion via an adhesive layer 103, as in the reflective layer 130 of Fig. 4.

[0038] A further modified example of the condensation absorbent sheet according to the embodiment of the present invention will now be described. Fig. 6 is a perspective view showing a condensation absorbent sheet 12 according to a modified example of the embodiment of the present invention. However, the same reference numerals are used for the same or corresponding components as those in Fig. 1, and detailed descriptions of common components and operations will be omitted.

[0039] In the condensation absorbent sheet 12, the vertical dimension of the heat insulating layer 120 is smaller than the vertical dimension of the water absorption layer 110. Therefore, when the bottom ends are aligned, an offset occurs at the top end. Specifically, the top end surface 110E of the water absorption layer 110 protrudes from the top end surface 120E1 of the heat insulating layer 120. The top end surface 110E of the water absorption layer 110 is an example of the edge of the water absorption layer of the present invention, and the top end surface 120E1 of the heat insulating layer 120 is an example of the edge of the heat insulating layer of the present invention.

[0040] As a result, when condensation formed on the surface of the window glass 20 flows down as water droplets, the water droplets remain in the gap G formed between the window glass 20 and the water absorption layer 110, and are then absorbed by the water absorption layer 110. This improves the efficiency of absorbing condensation.

[0041] In the above description, the entire upper end surface 110E of the water absorption layer 110 protrudes from the upper end surface 120E1 of the heat insulating layer 120, but it may be configured so that only a portion of it protrudes.

[0042] In addition, a further modification of the condensation absorbent sheet according to the embodiment of the present invention has a configuration in which the contour of the upper end surface 120E2 of the heat insulating layer 120 is configured with curved projections and depressions arranged alternately in a uniform pattern, as in the condensation absorbent sheet 13 shown in Fig. 7. This increases the volume of the gap G formed between the window glass 20 and the water absorption layer 110, making it easier for water droplets to accumulate. This further improves the efficiency of absorbing condensation.

[0043] 7, the contour of the upper end surface 120E2 of the heat insulating layer 120 is configured with curved projections and depressions arranged alternately, but the contour of the upper end surface 120E2 of the heat insulating layer 120 may have any shape as long as the contour length of the upper end surface 120E2 is longer than the contour length of the upper end surface 110E of the water absorption layer 110 so as to increase the volume of the gap G. For example, the contour of the upper end surface 120E2 may have projections and depressions with different shapes and sizes. The contour may also have projections and depressions that are curved in a random pattern or bent projections and depressions.

[0044] In the above description, the condensation absorbent sheet according to the embodiment of the present invention is applied to a window glass 20 as an example of an object to be adhered, but it is not limited to a specific material, purpose, use, etc. However, it is preferable to apply it to any wall, building material, etc. used to separate indoors from outdoors.

[0045] As described above, the embodiment of the present invention has been disclosed in the above description, but the present invention is not limited thereto.

[0046] In other words, various modifications can be made to the above-described embodiments and variants in terms of mechanism, shape, material, quantity, position, arrangement, etc., without departing from the scope of the technical idea and purpose of the present invention, and such modifications are included in the present invention. [Explanation of symbols]

[0047] 10, 11, 12, 13 Condensation absorption sheet 20 Window Glass 101, 103 Adhesive layer 102 Adhesive layer 110 Water absorption layer 110E, 120E, 120E1, 120E2 Top surface 110a First water absorption layer main surface 110b Second water absorption layer main surface 120 Insulation Layer 120a First heat insulating layer main surface 120b Second heat insulating layer main surface 130 Reflective layer 130a First reflecting layer main surface 130b Second reflecting layer main surface 131 Aluminum vapor deposition layer

Claims

1. A dew absorbing sheet that is attached to an object and absorbs dew from the object, a heat insulating layer made of a material having heat insulating properties; a water-absorbing layer made of a water-absorbing material and laminated on the heat-insulating layer; The surface of the heat insulating layer that does not face the water absorbing layer faces the object. Condensation absorption sheet.

2. The heat insulating layer further includes a reflective layer made of a metal material, the reflective layer being disposed on either the surface opposite to the water absorbing layer or the surface opposite to the water absorbing layer. The condensation absorbent sheet according to claim 1.

3. The insulating material is foamed polyethylene. The condensation absorbent sheet according to claim 1.

4. The water-absorbent material is a fiber made of either polyester or rayon, or a blend of both. The condensation absorbent sheet according to claim 1.

5. The metallic material is aluminum. The condensation absorbent sheet according to claim 2.

6. The entire edge of the water absorption layer or a part of the edge of the heat insulating layer protrudes beyond the edge of the heat insulating layer. The condensation absorbent sheet according to claim 1.

7. The contour length of the edge of the heat insulating layer is greater than the contour length of the edge of the water absorbing layer. The condensation absorbent sheet according to claim 6.

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