JP5968122B2 - Anti-condensation face material and anti-condensation wall structure - Google Patents

Description

  The present invention relates to a dew condensation preventing face member attached to a wall for preventing dew condensation, and a dew condensation preventing wall structure using the dew condensation preventing face member.

The indoor side surface of the wall that separates indoors and outdoors is affected by outside air temperature. For this reason, in an environment where the outdoor temperature is low and the temperature and humidity on the indoor side are high, if the indoor side surface of the wall becomes below the dew point temperature, a large amount of condensation occurs on the indoor side surface of the wall. Condensation can penetrate the interior of the wall from fine cracks on the wall surface to contaminate the wall or cause mold. Condensation moves along the wall surface to other places, causing electric leakage or rusting the steel frame. In order to avoid such a situation, a dew-proof coating and a waterproof coating have been conventionally applied to the indoor surface of the wall, but the effect is low, and the waterproof coating prevents the occurrence of condensation itself. Can not.
On the other hand, in order to prevent dew condensation on the indoor side surface of the wall, the temperature of the indoor side surface should not reach the dew point temperature in the indoor environment. For this, it is conceivable that a heat insulating surface material such as a glass wool felt molded product or a rock wool felt molded product is adhered to the indoor side surface of the wall.

As a heat insulating face material, what was described in the following patent documents 1-5 can be illustrated.
The composite heat insulating material of Patent Document 1 is obtained by attaching an inorganic sheet to the surface of a phenol resin foam core material, and further joining and integrating an aluminum foil and a PET composite sheet (moisture-proof layer) on the surface of one inorganic sheet. .
In the heat insulating material of Patent Document 2, the heat insulating layer has a two-layer structure of glass fiber and rock wool, and there is a moisture barrier layer of PE film and aluminum foil between them, and a non-woven fabric of PET fiber is bonded to one side. .
In the rock wool panel of Patent Document 3, a composite of a fiber sheet and a metal foil sheet is bonded to the surface layer of rock wool as a heat insulating layer.
In the fire-resistant coating sheet of Patent Document 4, a non-woven fabric and an aluminum foil are pasted on the surface of rock wool as a heat insulating layer, and a non-combustible paint is applied on the back surface.
In the refractory heat insulating material of Patent Document 5, an exterior material layer (aluminum foil, cloth, resin film) is formed on the surface of a laminate of hard isocyanurate foam or other rock wool as a heat insulating layer.
However, these are all considered as refractory heat insulating materials, and are not technical ideas that are attached to the indoor side surface of the wall body to prevent condensation on the indoor side surface.

In addition, the fireproof and airtight structure of Patent Document 6 shows a heat insulating structure of a wooden framed house, and a technical idea of attaching a heat insulating material to the indoor side surface of a concrete wall cannot be found. The heat insulating material is obtained by laminating a resin layer such as paper, aluminum foil and PET on one surface of rock wool as a heat insulating layer and laminating a composite layer of resin and paper on the other surface.
The fire-resistant coating material of Patent Document 7 has a structure in which a fire-resistant adhesive layer is provided on both surfaces of a ceramic fiber blanket as a heat insulating layer and a metal foil or glass cloth is pasted on the surface. Attach it with insulpine.
In any case, it is intended to prevent fire or heat flow indoors and outdoors, and no technical idea can be found to prevent condensation by directly attaching a heat insulating material to the indoor surface of the wall.

JP 63-162230 A Japanese Patent Laid-Open No. 9-25670 JP-A-10-183857 JP-A-7-310379 JP 55-122941 A JP 2001-146798 A JP-A-6-226903

As described above, the heat insulating face materials of Patent Documents 1 to 7 are intended to prevent fire and heat flow between indoors and outdoors, and are not intended to prevent condensation on the indoor side surface of the wall.
An object of the present invention is to provide a dew condensation prevention face material that is attached to the indoor side surface of a wall body to prevent dew condensation, and to provide a dew condensation prevention wall structure using the dew condensation prevention face material.

In order to achieve the above object, the anti-condensation face material of the present invention is formed of a porous material, and is formed on a heat insulating layer having a first surface and a second surface forming front and back surfaces, and a first surface of the heat insulating layer. An outer surface protective layer, and a second nonwoven layer composed solely of a nonwoven layer formed only on the second surface of the heat insulating layer, the outer surface protective layer comprising a first nonwoven layer, an aluminum foil layer, It consists of a protective film layer and is bonded to the heat insulation layer with the first nonwoven fabric layer as the surface. Here, as the porous material, it is preferable to use a fibrous porous material, and it is more preferable to use rock wool.
In the dew condensation prevention wall structure of the present invention, the dew condensation prevention face material is used, and the second surface of the dew condensation prevention face material is attached so as to face the indoor side surface of the concrete wall. .

  Here, the dew condensation preventing face member and the wall body are fixed using a fixing member and an adhesive. The fixing member fixes the upper side of the dew condensation prevention face material, and the adhesive is applied between the dew condensation prevention face material and the indoor side surface of the concrete wall. Moreover, it is preferable to use what was formed with resin as said fixing member. Furthermore, it is preferable that the adhesive applied between the second surface and the indoor side surface of the wall body is provided with a region where the adhesive is applied and a region where the adhesive is not applied. It is.

The present invention has the following effects.
(1) In the anti-condensation face material, a nonwoven fabric layer is provided on one surface of the heat insulating layer made of a porous material, and an outer surface protection layer is provided on the other surface. The outer surface protection layer is formed of a nonwoven fabric layer, an aluminum foil layer, and a protection film layer. By comprising three layers, it is possible to prevent the temperature of the indoor surface of the dew condensation prevention face material attached to the indoor surface of the wall from reaching the dew point temperature in the indoor environment. Therefore, if it is a wall body to which the dew condensation preventive face material of the present invention is attached, dew condensation will not occur at the portion in contact with the indoor environment.
(2) Further, by providing a non-woven fabric layer on the back surface of the heat insulating layer, even if dew condensation occurs on the indoor side surface of the concrete wall, the non-woven fabric layer absorbs the moisture of the dew condensation, and dew condensation water enters the heat insulating layer. Prevent penetration. The generated condensed water is absorbed by the concrete and eventually diffused to prevent the condensed water from remaining inside.
(3) Furthermore, by providing an aluminum foil layer, the flow of air from the outside to the porous material can be highly prevented.
(4) Also, by providing a non-woven fabric layer on the outermost surface and not exposing the aluminum foil layer, the aluminum foil layer may be broken or rock wool even if it contacts the surface of the anti-condensation face material during construction. As a result, the surface of the heat insulating material is not roughened, and the dew condensation preventing face material can be easily handled. Moreover, it becomes easy to perform the construction even when bonding.
(5) Even when fixing the dew condensation prevention face material to the indoor side surface of the wall body, since the non-woven fabric layer is provided on the adhesion surface of the dew condensation prevention face material to the indoor side surface of the wall body, it is easy to perform adhesion. Adhesion performance is also improved.
(6) In addition to preventing condensation, a combination of a heat insulating material made of a porous material, an aluminum foil layer, and a non-woven fabric layer can provide good sound absorption performance particularly in a low frequency region.

FIG. 1 (a) is a cross-sectional view schematically showing the structure of the dew condensation preventing face material of the present invention, and FIG. 1 (b) is a view showing each layer separated for explanation. FIG. 2 is a cross-sectional view schematically showing a first example of a fixing means in a heat insulating wall structure using the dew condensation preventing face material of the present invention. FIG. 3 is a view schematically showing a fixing manner in the heat insulating wall structure using the dew condensation preventing face material of the present invention from an oblique direction. FIG. 4 is a cross-sectional view schematically showing a second example of the fixing means in the heat insulating wall structure using the dew condensation preventing face material of the present invention.

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 (a) is a cross-sectional view schematically showing a dew condensation preventing face material 1 of the present invention, and FIG. 1 (b) shows each layer of the dew condensation preventing face material 1 separately for explanation. FIG.
The anti-condensation face material 1 of the present invention is composed of a heat insulating layer 2, an outer surface protective film layer 5, and a second non-woven fabric layer 9, and the heat insulating layer 2 has a first surface 3 and a second surface forming the front and back surfaces. The outer surface protective film layer 5 is bonded to the first surface 3, and the second nonwoven fabric layer 9 is bonded to the second surface 4.
The heat insulation layer 2 is made of a porous material such as glass wool or rock wool having excellent heat insulation performance, and rock wool is used in this embodiment.
The outer surface protective film layer 5 includes a first nonwoven fabric layer 6, an aluminum foil layer 7, and a protective film layer 8. The protective film layer 8 is bonded to the first surface 3 of the heat insulating layer 2, and the first nonwoven fabric layer is formed. It is comprised so that the layer 6 may become the surface.
The protective film layer 8 uses a polyethylene film in this embodiment.
In this embodiment, the aluminum foil layer 7 is bonded to the first nonwoven fabric layer 6 and has a thickness of 7 μm.
In the present embodiment, the first nonwoven fabric layer 6 and the second nonwoven fabric layer 9 are both made of polypropylene having a basis weight of 12 g / m ² or a basis weight of 30 g / m ² .

Next, a fixing method for fixing the dew condensation preventing face material 1 shown in FIG. 1 to the indoor side surface of the concrete wall 11 will be described with reference to FIGS.
2 and 3 are examples in which a fixing pin 21 struck from the outer surface protective film layer 5 side of the dew condensation preventing face material 1 is used as the fixing member 20, and FIG. 2 schematically shows the fixing state from the cross-sectional direction. FIG. 3 is a diagram schematically showing the state of fixing from an oblique direction. The fixing pin 21 includes a head portion 22 and a pin portion 23. As shown in FIG. 3, after the hole 14 is drilled in the concrete wall 11 with a drill or the like, The head 22 is hit and fixed. The material of the fixing pin 21 is made of resin for preventing the thermal bridge effect. Furthermore, in order to improve moisture proof performance, the head 22 of the fixing pin 21 may be covered with a seal or the like.

  In fixing, as shown in FIG. 3, a hole 14 is formed in the upper side of the concrete wall 11, and then an adhesive 13 is applied to the surface of the concrete wall 11 with a gap therebetween to prevent dew condensation prevention face material 1. The fixing pin 21 penetrates from the front surface of the steel plate and the pin tip protruding from the back surface side is inserted and fixed in correspondence with the hole 14 of the concrete wall 11. Here, the adhesive 13 is not applied to the entire surface of the concrete wall 11, but a region 12 where the adhesive is not applied is formed between the applied regions.

According to the present embodiment, in the dew condensation preventing face material 1, an outer surface protective film comprising three layers of a first nonwoven fabric layer 6, an aluminum foil layer 7, and a protective film layer 8 on one surface 3 of the heat insulating layer 2 made of a porous material. By providing the second non-woven fabric layer 9 on the layer 5 and the other surface 4, first the indoor side surface of the dew condensation prevention face material 1 is shielded from the temperature change of the inner surface of the concrete wall 11 by the heat insulation layer 2. It is possible to prevent the temperature of the indoor surface of the camera from reaching the dew point temperature in the indoor environment. In addition, by providing the second nonwoven fabric layer 9 on the back surface of the heat insulating layer 2, in the unlikely event that the heat insulating layer 2 is formed in a porous material such as rock wool or between the indoor side surface of the concrete wall 11 and the heat insulating layer 2. Even if dew condensation occurs, it is possible to prevent moisture from remaining inside by absorbing moisture in the second nonwoven fabric layer 9 and then releasing the moisture to the outside. Furthermore, by providing the aluminum foil layer 7, it is possible to highly prevent the flow of air from the indoor side to the porous material, and to prevent a situation in which moisture flows in the porous material constituting the heat insulating layer 2. it can. Further, by providing the first non-woven fabric layer 6 on the outermost surface, even if the dew condensation prevention face material 1 is handled roughly at the construction site, the surface is not easily torn. In some cases, it will be easier to install.

  Further, when the dew condensation prevention face material 1 is fixed to the indoor side surface of the concrete wall 11, the second nonwoven fabric layer 9 is provided on the adhesion surface of the dew condensation prevention face material 1 to the concrete wall 11. It is easy to perform and the adhesion performance is improved. Further, since the region 12 where the adhesive is not applied is provided between the regions where the adhesive 13 is applied during the bonding, the above-described bonding is performed even when condensation occurs on the indoor side surface of the concrete wall 11. Condensation can be diffused to the outside from the region 12 where the agent is not applied.

  FIG. 4 shows an example in which a spindle rod 24 fixed to the indoor side surface of the concrete wall 11 is used as another example of the fixing member 20. Also in this embodiment, the base of the spindle rod 24 is made of resin in order to prevent the thermal bridge effect. Also in the present embodiment, the same effect as when the fixing pin 21 is used as the fixing means can be obtained.

Hereinafter, the experiment based on this invention is demonstrated concretely. The present invention is based on the findings obtained from the results of the following experiments.
(Experiment 1)
The following experiment was conducted to confirm the occurrence of condensation on the anti-condensation face material.
A surface material is provided on the heat insulating material and fixed to the indoor side of the concrete wall, and left for 3 days under conditions of an indoor temperature of 25 ° C, an indoor humidity of 60RH, and an outdoor temperature of -4 to 7 ° C to confirm the occurrence of condensation. did.
(Specimen 1)
Using rock wool as a heat insulating material, a non-woven fabric, an aluminum foil, and a polyethylene film were provided in this order from the heat insulating layer side as the outer surface protective film layer (surface material) provided on the surface side, and nothing was provided on the back surface side.
(Comparative Example 1)
About the structure of the heat insulating material and the outer surface protective film layer provided on the front surface side, the same as in Example 1, and the back surface side was prepared in the order of the nonwoven fabric, the aluminum foil, and the polyethylene film from the heat insulating layer side.
(result)
In Comparative Example 1, the presence of condensation was observed on the indoor surface of the concrete wall, but the presence of condensation was not observed in Test Sample 1. In any of the examples, it is considered that condensation occurs on the indoor surface of the concrete wall. However, the specimen 1 was found to exist because it absorbed, diffused and evaporated the condensation generated on the indoor surface of the concrete wall. It is considered impossible.

(Experiment 2)
In order to confirm the difference in the occurrence of condensation due to the difference in the fixing member, the following experiment was conducted.
(Specimen 2)
As in Example 1, using rock wool as the heat insulating material, as the outer surface protective film layer provided on the front surface side, from the heat insulating layer side, the nonwoven fabric, the aluminum foil, the polyethylene film are provided in this order, and the back side is provided with nothing. A plastic pin was used as a member to be manufactured and fixed to the wall.
(Comparative Example 2)
The structure of the heat insulating material and the outer surface protective film layer was the same as that of the test body 2, and a metal pin was used as a fixing member to the wall.
(result)
In Comparative Example 2, dew condensation occurred on the pins and shafts, but no dew condensation was observed on the specimen 2.

(Experiment 3)
In order to evaluate the difference in the dew condensation prevention performance due to the difference in the stacking order of the outer surface protective film layers provided on the surface of the dew condensation prevention face material, the following experiment was conducted.
(Specimen 3)
As with the test body 1, as a heat insulating material constituting the heat insulating layer, rock wool is used, and as an outer surface protective film layer provided on the surface, a polyethylene film, an aluminum foil, and a non-woven fabric are provided in this order from the heat insulating layer side. What was made to appear was produced.
(Comparative Example 3)
The structure of the heat insulating layer was the same as that of the test body 3, and the outer surface protective film layer provided on the surface was provided in the order of the non-woven fabric, the aluminum foil, and the polyethylene film from the heat insulating layer side so that the polyethylene film appeared on the surface. .

As a test method, a test was conducted in accordance with a measurement method of thermal resistance and thermal conductivity of JISA 1412-2 insulating material-second part: heat flow meter method (HFM method). Each physical property value is as follows.
Thermal resistance of rock wool layer R1 0.294 (m ² · K / W)
Thermal resistance of surface material R2 0 (m ² · K / W)
Surface heat transfer resistance inside outer wall R3 0.11 (m ² · K / W)
Thermal resistance of air layer R4 0.09 (m ² · K / W)
(result)
The value of the surface temperature of the test specimen is 21.7 ° C. in Comparative Example 3 with respect to 25.4 ° C. of the test specimen 3, and compared with Comparative Example 3, the surface of the heat insulating layer has a polyethylene film, aluminum. It can be seen that the specimen 3 provided in the order of foil and non-woven fabric has a higher surface temperature value and higher dew condensation prevention performance.

In the embodiment, rock wool is used as the heat insulating layer 2, but it may be made of other porous materials such as glass wool. Moreover, in the said Example, although the 2nd nonwoven fabric layer 9 is provided in the surface facing the concrete wall 11 of the dew condensation prevention face material 1, a porous material is directly fixed to the concrete wall 11 without providing a nonwoven fabric layer. You may do it. Moreover, in the said Example, although the aluminum foil layer 7 was adhere | attached and provided in the 1st nonwoven fabric layer 6, you may adhere and provide in the protective film layer 8, the 1st nonwoven fabric layer 6, aluminum foil The layer 7 and the protective film layer 8 may be provided separately.
In the embodiment, the shape of the adhesive 13 applied when fixing the concrete wall of the anti-condensation face material 1 is such that the applied portion crosses the cross and the regions 12 where the adhesive is not applied are regularly arranged vertically and horizontally. However, the shape of the application is not particularly limited as long as the adhesive application area and the adhesive non-application area are alternately arranged, and the circular shape or the adhesive application area radially from the center. Other application shapes such as alternating and non-adhesive areas can also be selected and used.

DESCRIPTION OF SYMBOLS 1 Condensation prevention face material 2 Heat insulation layer 3 First surface (of heat insulation layer) 4 Second surface (of heat insulation layer) 5 Outer surface protective film layer 6 First nonwoven fabric layer 7 Aluminum foil layer 8 Protective film layer 9 Second nonwoven fabric Layer 11 Concrete wall 12 Area where adhesive is not applied 13 Adhesive (area where adhesive is applied)
14 hole 20 fixing member 21 fixing pin 22 head 23 pin part 24 spindle shaft

Claims (8)

A heat-insulating layer formed of a porous material and having a first surface and a second surface that are front and back;
An outer surface protective layer formed on the first surface of the heat insulating layer;
Having a second nonwoven layer consisting only of a nonwoven fabric layer, formed solely on the second surface of the heat insulation layer,
The outer surface protective layer comprises a first nonwoven fabric layer, an aluminum foil layer, and a protective film layer, and is adhered to the heat insulating layer with the first nonwoven fabric layer as a surface. The dew condensation preventing face material according to claim 1, wherein the porous material is a fibrous porous material. The dew condensation preventing face material according to claim 2, wherein the fibrous porous material is rock wool. The dew condensation preventing face material according to any one of claims 1 to 3 is attached to the indoor side surface of the wall body so that the second surface faces the indoor side surface of the wall body. Prevention wall structure. The dew condensation preventing wall structure according to claim 4, wherein the wall body is a concrete wall. The dew condensation prevention surface material and the wall body are fixed by a fixing member and an adhesive, the fixing member fixes an upper side portion of the dew condensation prevention surface material, and the adhesive includes the second surface and the The dew condensation preventing wall structure according to claim 4 or 5, wherein the dew condensation preventing wall structure is applied between the wall and the indoor side surface. The dew condensation prevention wall structure according to claim 6, wherein the fixing member includes a portion that supports the dew condensation prevention face member and a portion that is fixed to the wall surface, and is formed of a resin. The adhesive applied between the second surface and the indoor side surface of the wall body is provided with a region where the adhesive is applied and a region where the adhesive is not applied. The dew condensation preventing wall structure according to any one of claims 5 to 7.

Images