Thermal insulation material

Abstract

To provide a thermal insulation material that can improve workability of installation of the thermal insulation material including a moisture-proof sheet.SOLUTION: A thermal insulation material comprises a fiber type thermal insulation material, a moisture-proof sheet attached on one principal surface of the aforesaid fiber type insulation material, and a moisture-permeable sheet attached on the other principal surface opposite to the aforesaid first principal surface with the aforesaid fiber type thermal insulation material between them. The aforesaid fiber type thermal insulation material and the aforesaid moisture-proof sheet are not bonded.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a heat insulating material.

Background Art

[0002] Due to the increasing demand for energy conservation in recent years, heat insulation using a heat insulating material has been carried out in buildings and the like. The heat insulating material is used by being fitted into the structural frame of a building, and the heat insulating material suppresses the transfer of heat between the inside and outside of the building. Examples of such heat insulating materials include fibrous heat insulating materials and foamed plastic heat insulating materials.

[0003] By the way, moisture may penetrate from the inside of a building into the heat insulating material, causing condensation, and the heat insulating material may not be able to fully exhibit its performance. Therefore, as disclosed in Patent Document 1, a moisture-proof sheet is adhered to the indoor side of the main body of the heat insulating material with an adhesive to prevent condensation inside the heat insulating material. Further, in order to prevent scattering of the material (for example, fiber) constituting the main body of the heat insulating material and to allow moisture inside the heat insulating material to escape to the outside, the outdoor side of the main body of the heat insulating material is covered with a moisture-permeable sheet.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] When the heat insulating material is fitted into the structural frame of a building, the heat insulating material may be cut to fit the dimensions between the structural frames. In such a case, in the heat insulating material to which the moisture-proof sheet is attached with an adhesive, the moisture-proof sheet is peeled off from one end of the heat insulating material, and a part of the main body of the heat insulating material (for example, a fiber-based heat insulating material) is cut. Then, the main body of the heat insulating material with adjusted dimensions is filled between the structural frames, the moisture-proof sheet is attached again to the main body of the heat insulating material, and the moisture-proof sheet is fastened to the structural frame with a tucker or the like. Thus, in the heat insulating material having a moisture-proof sheet, in the construction work involving cutting, it takes time and labor, and simplification of the construction work has been desired.

[0006] An object of the present invention is to provide a heat insulating material capable of improving the workability of the construction of a heat insulating material including a moisture-proof sheet.

Means for Solving the Problems

[0007] According to the present invention, a fiber-based heat insulating material, a moisture-proof sheet disposed on one main surface of the fiber-based heat insulating material, a moisture-permeable sheet disposed on the other main surface opposite to the one main surface with the fiber-based heat insulating material interposed therebetween, are included, and the fiber-based heat insulating material is not adhered to the moisture-proof sheet, a heat insulating material is provided.

Effects of the Invention

[0008] According to the present invention, the workability of the construction of a heat insulating material including a moisture-proof sheet can be improved.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0010] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. Note that the following embodiments do not limit the invention according to the claims, and not all combinations of the features described in the embodiments are essential for the invention. Two or more of the plurality of features described in the embodiments may be arbitrarily combined. Also, the same or similar configurations are given the same reference numerals, and redundant descriptions are omitted.

[0011] [Heat Insulating Material According to the Present Embodiment] The heat insulating material according to the present embodiment includes a fibrous heat insulating material, a moisture-proof sheet disposed on one surface of the fibrous heat insulating material, and a moisture-permeable sheet disposed on the other main surface on the opposite side of the one main surface with the fibrous heat insulating material interposed therebetween. Further, the fibrous heat insulating material is not adhered to the moisture-proof sheet, and the heat insulating material according to the present embodiment can improve the workability of construction.

[0012] FIG. 1 shows a plan view of the heat insulating material according to the present embodiment, FIG. 2 shows a cross-sectional view taken along line A-A' of the heat insulating material according to the present embodiment, and FIG. 3 shows a cross-sectional view taken along line B-B' of the heat insulating material according to the present embodiment. As shown in FIGS. 1 to 3, the heat insulating material 1000 according to the present embodiment includes a fibrous heat insulating material 100, a moisture-proof sheet 200, and a moisture-permeable sheet 300.

[0013] As shown in FIGS. 2 and 3, the heat insulating material 1000 according to the present embodiment is configured by sandwiching the fibrous heat insulating material 100 between a moisture-proof sheet 200 and a moisture-permeable sheet 300. The fibrous heat insulating material 100 is in contact with and covered by the moisture-proof sheet 200 and the moisture-permeable sheet 300, but is not adhered (unadhered) to the moisture-proof sheet 200 and the moisture-permeable sheet 300. Thereby, when the fibrous heat insulating material 100 is cut and fitted into the structural frame of the building, the steps of peeling the moisture-proof sheet 200 from the fibrous heat insulating material 100 and reattaching the moisture-proof sheet 200 to the fibrous heat insulating material 100 with adjusted dimensions are eliminated, and the workability of installing the heat insulating material is improved.

[0014] Further, the moisture-proof sheet 200 is disposed on one main surface 100a of the fibrous heat insulating material 100 and is flat. The moisture-permeable sheet 300 is disposed on the other main surface 100b opposite to the one main surface 100a with the fibrous heat insulating material 100 interposed therebetween, and is further disposed along the side surface 100c of the fibrous heat insulating material 100, and a concave portion is formed. The fibrous heat insulating material 100 is accommodated in this concave portion.

[0015] The moisture-proof sheet 200 and the moisture-permeable sheet 300 have extending portions 200a and 300a that extend in the width direction (X direction) from both side surfaces along at least the length direction (Y direction) of the fibrous heat insulating material 100. The extending portion 200a of the moisture-proof sheet 200 and the extending portion 300a of the moisture-permeable sheet 300 are joined at a joining portion 400a. Further, the moisture-proof sheet 200 and the moisture-permeable sheet 300 may have extending portions 200b and 300b that extend in the length direction (Y direction) from both side surfaces along at least the width direction (X direction) of the fibrous heat insulating material 100, and the extending portion 200b of the moisture-proof sheet 200 and the extending portion 300b of the moisture-permeable sheet 300 may be joined at a joining portion 400b.

[0016] In one embodiment, the joining portions 400a and 400b are joined by heat fusion or an adhesive. Examples of the adhesive include hot melt polyolefin adhesives, styrene-butadiene rubber adhesives, polyurethane adhesives, acrylic adhesives, epoxy resin adhesives, silicone resin adhesives, and the like.

[0017] In FIG. 1, the central side of the moisture-permeable sheet 300, that is, the inner side surrounded by the joint portions 400a and, in some cases, the joint portions 400a and 400b is the housing portion of the fibrous heat insulating material 100. Further, including the joint portions 400a and 400b, the outer sides with respect to the housing portion are the extending portions 200a, 200b, 300a, and 300b. The lengths in the width direction (X direction) of the extending portions 200a and 300a, and the lengths in the length direction (Y direction) of the extending portions 200b and 300b are not limited. Also, in FIG. 1, the joint portion 400a and the joint portion 400b extend linearly, but they may extend in a curved or meandering manner. Further, in FIG. 1, the joint portion 400a extending in the length direction (Y direction) is formed to extend to both ends in the length direction (Y direction) of the moisture-permeable sheet 300, but it may be formed not to extend to both ends.

[0018] The heat insulating material 1000 according to the present embodiment can be used for installation between pillars of a wall, under a floor, or in a ceiling space or the like. In that case, the extending portions 200a and 300a of the heat insulating material 1000 can be fixed to structural members such as floor joists, wall plates, studs, and pillars of a building using staples, nails, or the like.

[0019] (Fibrous heat insulating material) In one embodiment, the fibrous heat insulating material 100 has a first main surface (one main surface) 100a, a second main surface (the other main surface) 100b, and a side surface 100c extending between the first main surface 100a and the second main surface 100b. The first main surface 100a and the second main surface 100b extend in the width direction (X direction) and the length direction (Y direction), and the side surface 100c extends in the thickness direction (Z direction). Note that the main surface refers to the surface with the largest surface area among the fibrous heat insulating material 100. In one embodiment, the fibrous heat insulating material 100 can have a rectangular parallelepiped shape, particularly a plate shape. For example, the dimensions of the fibrous heat insulating material 100 can be selected from the range where the length is 1000 mm or more and 3000 mm or less, the width is 265 mm or more and 910 mm or less, and the thickness is 50 mm or more and 140 mm or less.

[0020] In one embodiment, the fibrous heat insulating material 100 can be composed of at least one of inorganic material fibers and organic material fibers. For example, the fibrous heat insulating material 100 can be composed of inorganic material fibers, and glass fibers such as glass wool and rock wool can be used. The fibrous heat insulating material 100 may contain a binder. For example, the binder of the glass wool fibrous heat insulating material 100 may contain a phenolic resin, an acrylic resin, an epoxy resin, a melamine resin, a polyvinyl alcohol resin, or the like. Also, a binder mainly composed of a natural-derived material that does not substantially emit formaldehyde may be used.

[0021] The content rate of the binder with respect to the total weight of the fibrous heat insulating material 100 can be 3% by weight or more in one embodiment, 5% by weight or more in another embodiment, 7% by weight or more in a further embodiment, and can be 13% by weight or less in one embodiment, 11% by weight or less in another embodiment, 9% by weight or less in a further embodiment.

[0022] The density of the fibrous heat insulating material 100 is 20 kg / m 3 or more in one embodiment, 24 kg / m 3 or more in another embodiment, 30 kg / m 3 or more in a further embodiment, 40 kg / m 3 or more in a further embodiment, and can be 100 kg / m 3 or less in one embodiment, 80 kg / m 3 or less in another embodiment, 60 kg / m 3 or less in a further embodiment, 50 kg / m 3 or less in a further embodiment.

[0023] When a fibrous heat insulating material is fitted between the columns of a building, it may gradually move downward (slip down) in the direction of gravity. Therefore, conventionally, the fibrous heat insulating material has been attached to a moisture-proof sheet with an adhesive or the like, and the moisture-proof sheet has been fastened to the column with a tacker or the like to prevent the fibrous heat insulating material from slipping down. The fibrous heat insulating material 100 according to the present embodiment has an improved repulsive force by having the above-described density. Therefore, even if the fibrous heat insulating material 100 and the moisture-proof sheet are not adhered to each other, the slip-down of the fibrous heat insulating material is suppressed by the repulsive force, frictional force, etc. of the fibrous heat insulating material 100 in the heat insulating material 1000 according to the present embodiment.

[0024] (Moisture-proof sheet) The moisture-proof sheet 200 may be a sheet material having excellent moisture-impermeable performance, and can be an aluminum, resin sheet, or the like. Examples of the resin sheet include polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, and the like. Examples of the aluminum include a sheet obtained by vapor-depositing aluminum on these resin sheets, aluminum foil, and the like.

[0025] The water vapor transmission resistance value of the moisture-proof sheet 200 can be 0.003 m 2 ·s·Pa / ng or more and 0.150 m 2 ·s·Pa / ng or less. The water vapor transmission resistance value can be measured according to JIS A6930.

[0026] The length and width of the moisture-proof sheet 200 can be equal to or greater than the length and width dimensions of the fibrous heat insulating material 100. The thickness of the moisture-proof sheet 200 is, in one embodiment, 2 mm or less, in another embodiment, 1 mm or less, in a further embodiment, 0.2 mm or less, and in one embodiment, 0.01 mm or more, in another embodiment, 0.05 mm or more, and in a further embodiment, 0.1 mm or more. By setting the thickness in this way, the tear strength is improved and the weight does not become too heavy.

[0027] (Water vapor permeable sheet) The moisture-permeable sheet 300 may be a sheet material with excellent moisture-permeability, such as a resin sheet. Examples of the resin sheet include polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, and the like.

[0028] The moisture resistance value of the moisture-permeable sheet 300 can be 0.0001 m 2 ·s·Pa / ng or more and 0.001 m 2 ·s·Pa / ng or less. The moisture resistance value can be measured in accordance with JIS A6930. Further, in order to increase the moisture permeability efficiency of the moisture-permeable sheet 300, ventilation holes may be provided in the moisture-permeable sheet.

[0029] The length and width of the moisture-permeable sheet 300 can be equal to or greater than the length and width dimensions of the fibrous heat insulating material 100. The thickness of the moisture-permeable sheet 300 is, in one embodiment, 2 mm or less, in another embodiment, 1 mm or less, in a further embodiment, 0.2 mm or less, and in one embodiment, 0.01 mm or more, in another embodiment, 0.05 mm or more, and in a further embodiment, 0.1 mm or more. By setting the thickness in this way, the tear strength is improved and the weight does not become too heavy.

[0030] [Heat insulating material according to another embodiment] The heat insulating material according to another embodiment has recesses formed in a moisture-proof sheet and a moisture-permeable sheet. Hereinafter, the portions different from the moisture-proof sheet 200 and the moisture-permeable sheet 300 according to the present embodiment shown in FIGS. 2 and 3 will be described. The same components are denoted by the same reference numerals, and the description of the common components will be omitted.

[0031] FIG. 4 is a cross-sectional view corresponding to the A-A' cross-section of FIG. 1 of the heat insulating material according to another embodiment, and FIG. 5 is a cross-sectional view corresponding to the B-B' cross-section of FIG. 1 of the heat insulating material according to another embodiment. As shown in FIGS. 4 and 5, the heat insulating material according to another embodiment is configured such that the fibrous heat insulating material 100 is sandwiched between a moisture-proof sheet 200 and a moisture-permeable sheet 300. The fibrous heat insulating material 100 is in contact with and covered by the moisture-proof sheet 200 and the moisture-permeable sheet 300, but the moisture-proof sheet 200 and the moisture-permeable sheet 300 are not adhered (not adhered).

[0032] Accordingly, when the fibrous heat insulating material 100 is cut and fitted into the structural frame of a building, there is no need for the process of peeling the moisture-proof sheet 200 from the fibrous heat insulating material 100 and the process of reattaching the moisture-proof sheet 200 to the fibrous heat insulating material 100 with adjusted dimensions, improving the workability of the construction of the heat insulating material. Further, recesses are formed in the moisture-proof sheet 200 and the moisture-permeable sheet 300, and by overlapping them so that the recesses of both face each other, a housing portion for the moisture-proof sheet 200 and the moisture-permeable sheet 300 is formed. The fibrous heat insulating material 100 is housed in this housing portion.

[0033] [Method for constructing the heat insulating material according to the present embodiment] In the method for installing the heat insulating material according to this embodiment, a method of cutting and fitting the heat insulating material so as to match the dimensions between the structural frameworks will be described. In this installation method, the moisture-proof sheet 200 is peeled off from the moisture-permeable sheet 300 at the joint portions 400a and 400b therebetween, and a part of the fibrous heat insulating material 100 is cut so as to match the dimensions between the structural frameworks. Thereafter, the dimension-adjusted fibrous heat insulating material 100 is disposed on the moisture-permeable sheet 300, and the moisture-proof sheet 200 is disposed on the fibrous heat insulating material 100, and the moisture-proof sheet 200 and the moisture-permeable sheet 300 are re-bonded at the joint portions 400a and 400b. This heat insulating material 100 is filled between the structural frameworks, and the extended portion 200a of the moisture-proof sheet 200 and the extended portion 300a of the moisture-permeable sheet 300 are fastened to the structural frameworks with a tacker or the like. In this way, the steps of peeling the moisture-proof sheet 200 from the fibrous heat insulating material and re-attaching the moisture-proof sheet 200 to the dimension-adjusted fibrous heat insulating material are eliminated, and the workability of installing the heat insulating material is improved.

[0034] [Method for manufacturing the heat insulating material according to this embodiment] The method for manufacturing the heat insulating material of this embodiment includes forming a fibrous heat insulating material, sandwiching the fibrous heat insulating material between a moisture-proof sheet and a moisture-permeable sheet, and bonding the moisture-proof sheet and the moisture-permeable sheet to accommodate the fibrous heat insulating material in the moisture-proof sheet and the moisture-permeable sheet.

[0035] (Formation of the fibrous heat insulating material) The formation of the fibrous heat insulating material includes a fibrous aggregate forming step and a step of curing the fibrous aggregate. First, in the fibrous aggregate forming step, a raw material (such as glass) having a chemical composition substantially the same as the chemical composition of the desired fiber is melted, and the melt is ejected by a spinner to produce fibers having an average fiber diameter of about 3 to 7 μm.

[0036] Next, the obtained fibers are provided with a content of a binder containing a phenolic resin or a natural-derived material that does not substantially emit formaldehyde as a main component in an amount of about 3 to 13% by weight based on the total weight of the fibrous aggregate, and are deposited while being sucked by a suction device on a conveyor.

[0037] Next, in the curing process of the fibrous assembly, the fibrous assembly is heated and cured with a binder in an oven to produce a fibrous heat insulating material. Depending on the type and content of the binder, the heating temperature is 180 to 300 °C and the heating time is 30 to 300 seconds for heat curing, and the fibrous heat insulating material is produced.

[0038] (Place the fibrous heat insulating material inside the skin body) Place the fibrous heat insulating material at approximately the center of the moisture-proof sheet, stack the moisture-permeable sheet, and sandwich the fibrous heat insulating material between the moisture-proof sheet and the moisture-permeable sheet.

[0039] (Joining of the moisture-proof sheet and the moisture-permeable sheet) Join the moisture-proof sheet and the moisture-permeable sheet located on the outer periphery of the fibrous heat insulating material. The joining can be performed using an adhesive. Also, the method of applying the adhesive to the moisture-proof sheet and the moisture-permeable sheet is not particularly limited and can be performed using a spray. Also, the location to be joined can be made the same as the location of the joint portion described in [the heat insulating material according to this embodiment]. Thereby, the fibrous heat insulating material can be housed in the moisture-proof sheet and the moisture-permeable sheet.

[0040] (Summary of the embodiment) The disclosure of this specification includes the following heat insulating materials.

[0041] (1) A fibrous heat insulating material, A moisture-proof sheet disposed on one main surface of the fibrous heat insulating material, A moisture-permeable sheet disposed on the other main surface opposite to the one main surface with the fibrous heat insulating material sandwiched therebetween, and includes The fibrous heat insulating material is unbonded to the moisture-proof sheet, a heat insulating material.

[0042] (2) The moisture-proof sheet and the moisture-permeable sheet have extending portions extending from both side surfaces along at least the length direction of the fibrous heat insulating material, and the extending portion of the moisture-proof sheet and the extending portion of the moisture-permeable sheet are joined, the heat insulating material according to (1).

[0043] (3) The fibrous heat insulating material is the heat insulating material according to (1) or (2), which is a molded body of glass fiber.

[0044] (4) The density of the fibrous heat insulating material is 24 kg / m 3 or more, and is the heat insulating material according to any one of (1) to (3).

[0045] As described above, the embodiments of the invention have been described. However, the invention is not limited to the above embodiments, and various modifications and changes are possible within the scope of the gist of the invention.

Explanation of Reference Numerals

[0046] 100 Fibrous heat insulating material, 100a First main surface, 100b Second main surface, 100c Side surface, 200 Moisture-proof sheet, 200a, 200b Extended portions of the moisture-proof sheet, 300 Moisture-permeable sheet, 300a, 300b Extended portions of the moisture-permeable sheet, 400a, 400b Joint portions

Claims

1. A fibrous heat insulating material, a moisture-proof sheet disposed on one main surface of the fibrous heat insulating material, and a moisture-permeable sheet disposed on the other main surface opposite to the one main surface with the fibrous heat insulating material interposed therebetween, wherein the fibrous heat insulating material is not adhered to the moisture-proof sheet.

2. The moisture-proof sheet and the moisture-permeable sheet have extending portions extending from both side surfaces along at least the length direction of the fibrous heat insulating material, and the extending portion of the moisture-proof sheet and the extending portion of the moisture-permeable sheet are joined together. The heat insulating material according to claim 1.

3. The fibrous heat insulating material is a molded body of glass fibers. The heat insulating material according to claim 1.

4. The density of the fibrous heat insulating material is 24 kg / m ３ or more. The heat insulating material according to claim 1.

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