JP2019190227A - Moisture permeable waterproof sheet with projection and its manufacturing method, and outer wall structure and construction method - Google Patents

Abstract

To provide a moisture permeable waterproof sheet with projection capable of assuring a ventilation space between a face bar for structure and an outer wall material for a long period without using a ventilation furring edge.SOLUTION: The moisture permeable waterproof sheet with projection is composed of a first sheet layer having moisture permeable feature and waterproof feature and a second sheet layer having waterproof feature and heat resistance feature bonded together by an adhesive material and on a surface of the second sheet layer of an opposite side of a side bonded with the first sheet layer, a plurality of projection consisting of resin is spaced apart from one another.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a moisture permeable waterproof sheet with protrusions for securing a ventilation space in an outer wall structure, a manufacturing method thereof, an outer wall structure, and a construction method.

Conventionally, a ventilation construction method in an outer wall structure is known. As shown in FIG. 6, the outer wall structure 50 by the ventilation construction method is provided with a structural face material 53 such as a structural plywood on the outdoor side of a frame material composed of columns 51 and inter-columns 52 and the like, and waterproof properties on the structural surface material 53. A moisture permeable waterproof sheet 54 is installed, and a ventilation trunk edge 56 is arranged so that a ventilation space is formed between the outer wall material 55 such as ceramic siding and lightweight cellular concrete panel and the moisture permeable waterproof sheet 54. The structural face material 53 is penetrated by screws or nails 57 to fix the ventilation trunk edge 56 to the frame material, and the outer wall material 55 is fixed on the ventilation trunk edge 56 by screws 58. Thereafter, the heat insulating material 59 is filled between the frames, and the moisture-proof film 60 and the interior material 61 are installed on the indoor side.
By providing a ventilation space between the outer wall material 55 and the moisture-permeable waterproof sheet 54, rainwater that has entered from the outside is dripped from the lower end of the outer wall, and water vapor generated from the rainwater or water that enters from the indoor side is allowed to enter the ventilation space. By discharging with the flow of air moving upward, wetting of the wood, which is the casing, is prevented and the dry state is maintained, and as a result, the durability of the casing is improved.

  In order to construct an outer wall having a ventilation space, all operations including the installation of the ventilator rim must be performed on site. In addition, it takes a long time to install an outer wall having a continuous ventilation space from the lower end portion to the upper end portion of the outer wall, and there is a problem that the construction cost including material cost and labor cost becomes high. .

On the other hand, while maintaining heat insulation, it is possible to prevent the intrusion of water leakage and to have a breathability capable of preventing the occurrence of condensation, and a wall structure with good workability has been proposed (see, for example, Patent Document 1). ).
In addition, in order to prevent the occurrence of condensation inside the walls and roofs, protrusions were provided on one surface of the sheet base material as a material that can easily ensure the air permeability inside the walls and roofs. A spacer sheet has been proposed (see, for example, Patent Document 2).

Japanese Utility Model Publication No. 60-124419 JP 2001-279839 A

  By the way, in a building, it is common to form openings such as windows using a sash on the outer wall. In this opening, there is an opening reinforcing material composed of a vertical member having a length corresponding to the distance between the upper and lower beams and a cross member having a length corresponding to the widthwise dimension of this opening. Is done.

  For example, the sash constituting the window is arranged in a square space formed by the opening reinforcing material at a position where the lower frame of the sash covers the upper end of the exterior material, and the sash frame is directly on the opening reinforcing material or the opening reinforcing material. It is indirectly fixed to the opening reinforcing material via a load bearing face material arranged outside the.

  However, in the wall body structure described in Patent Document 1, when the outer wall is configured using a lightweight cellular concrete panel (ALC panel) having a thickness of 37 mm as the outer wall material, the overhang (blur) becomes larger than that of the standard specification outer wall. . For this reason, in order to attach a standardized sash, since the dimensions are different, special labor is required.

  For example, the sash frame is not directly attached to the opening reinforcing material, but is attached to the outside using a wood spacer. In this case, additional materials and construction labor for attaching the wood spacers are required. In addition, it is necessary to use a wide decorative frame as the sash is spread outward. As another method, attachment of the sash is the same as usual, but it is necessary to provide a draining material covering the outer wall material separately from the sash on the lower side of the opening.

  In addition, in the spacer sheet described in Patent Document 2, a plasticizer is added to the thermoplastic resin to make it flowable, and then the set projections are formed. After that, it is described that it is cured and constituted by cooling. Therefore, it is exemplified that heating conditions of 2 to 3 minutes are required at a high temperature of 80 to 150 ° C. When manufacturing a sheet-like product, it is preferable and general to manufacture continuously by roll winding or the like. The line speed is a factor directly related to productivity and cost. Therefore, a speed of about 15 m / min is practically a necessary condition. Here, if a heating time of 2 to 3 minutes is required, a heater line for drying at 80 to 150 ° C. must be provided for about 30 to 45 m. In view of manufacturing a product that is as thin and light as a sheet, it must be said that this is a very large facility.

  Moreover, in the technique described in Patent Document 2, resin is placed or dropped directly on a moisture-permeable waterproof sheet, and a resin protrusion is formed by heating and cooling, and is adhered to the sheet. Here, the moisture-permeable waterproof sheet used for the outer wall needs to have both waterproof and moisture-permeable properties, and is generally composed mainly of polyethylene. Generally, the usable temperature of the polyethylene resin is 100 ° C. or lower, and it is not preferable to expose the resin to 80 to 100 ° C. in the step of heating and gelatinizing the vinyl chloride resin as described above.

  In addition, a method in which a thermoplastic resin is heated and melted and dropped directly onto a moisture permeable waterproof sheet to form a protrusion is also conceivable, but in this case, since the resin temperature in the melted state is high, a polyethylene system is used. There is a high possibility of damaging the moisture-permeable waterproof sheet as the main component and causing problems on the waterproof surface.

  Furthermore, even if it becomes possible to form resin protrusions by dropping molten resin directly on the cooled or moisture-permeable waterproof sheet after heating, the resin protrusions are directly bonded to the moisture-permeable waterproof sheet. The projections formed on the sheet are intended to have a ventilation effect for the height, but when used in buildings (mostly wooden detached houses), for example, the seam in the longitudinal direction of the sheet, around the opening There are many parts that need to be stacked together, such as the coping part of the caps. Here, the protrusions are provided at intervals of at least about several tens of millimeters. However, if there are protrusions on each sheet of the overlapping portion, it is difficult to superimpose and install, and the ventilation space due to the original protrusion height The width of cannot be secured.

  In order to solve this problem, remove the resin protrusions adhered to the lower part of the sheet at the overlapping part, or prepare a sheet without resin protrusions only for the part to be overlapped. Need to be placed. In the former case, when the bonded resin protrusion is removed, the first sheet layer that is the bonded base material is damaged, and this functions as a moisture-permeable waterproof sheet that is expected to have a waterproof function. It will not be fulfilled. In the latter case, it is necessary to prepare a moisture-permeable waterproof sheet without protrusions separately from the sheet with protrusions, and cut and set the dimensions and shapes of the portions corresponding to the overlapping portions. . In this case, it is contrary to the simplification of the construction of the moisture permeable waterproof sheet and the reduction in the number of man-hours, and a considerable part of the significance of using this technique is lost.

  The present invention has been proposed in view of such a conventional situation, and an object of the present invention is to provide a sufficient ventilation space between the structural face material and the outer wall material without using a ventilation drum edge. Is to provide a moisture permeable waterproof sheet with protrusions, a manufacturing method thereof, an outer wall structure, and a construction method.

The inventors of the present invention have intensively studied to achieve the above object, and conceived that the above object can be achieved by laminating the first sheet layer and the second sheet provided with the resin protrusion in advance. It came to complete. That is, the present invention is as follows.
[1]
A first sheet layer having moisture permeability and waterproof properties and a second sheet layer having moisture permeability and heat resistance are bonded together with an adhesive,
A plurality of protrusions made of resin are provided on the surface of the second sheet layer opposite to the side bonded to the first sheet layer, spaced apart from each other, Moisture permeable waterproof sheet with protrusions.
[2]
The first sheet layer is made of a sheet mainly composed of polyethylene,
The moisture permeable waterproof sheet with protrusions according to [1], wherein the second sheet layer is made of a sheet mainly composed of polyester.
[3]
The moisture permeable waterproof sheet with projections according to [1] or [2], wherein the projections are made of a thermoplastic resin.
[4]
The moisture permeable waterproof sheet with protrusions according to [3], wherein the thermoplastic resin is a polyamide resin.
[5]
The moisture permeable waterproof sheet with protrusions according to any one of [1] to [4], wherein the protrusions have a height of 3 to 5 mm.
[6]
The moisture permeable waterproof sheet with projections according to any one of [1] to [5], wherein the interval between the adjacent projections is 50 to 70 mm.
[7]
The moisture permeable waterproof sheet with protrusions according to any one of [1] to [6], wherein the protrusions are arranged in a staggered pattern.
[8]
The moisture permeable waterproof sheet with protrusions according to any one of [1] to [7], wherein the adhesive is a polyolefin-based adhesive.
[9]
Dropping a resin melted by heat onto a second sheet having moisture permeability and heat resistance, and cooling to form a plurality of protrusions on the second sheet; and
Bonding the first sheet layer having moisture permeability and waterproofness to the surface of the second sheet layer opposite to the surface on which the protrusions are formed using an adhesive;
A method for producing a moisture permeable waterproof sheet with protrusions, comprising:
[10]
Pillars fixed to the foundation of the building,
A structural face material attached to the outside of the column;
An outer wall material arranged on the outdoor side of the structural face material;
An outer wall structure provided with the moisture permeable waterproof sheet with protrusions according to any one of [1] to [8],
The moisture permeable waterproof sheet with protrusions is directly or indirectly attached to the structural surface material with the surface on which the protrusions are formed facing the outdoor side,
An outer wall material is arranged on the outdoor side of the moisture permeable waterproof sheet with protrusions,
The outer wall material is an outer wall structure that is attached to the pillar by a screw that penetrates the moisture permeable waterproof sheet with protrusions and the structural surface material.
[11]
The outer wall structure according to [10], wherein a heat insulating material is disposed between the structural surface material and the moisture permeable waterproof sheet with protrusions.
[12]
The outer wall structure according to [10] or [11], wherein the outer wall material is a lightweight cellular concrete panel.
[13]
Pillars fixed to the foundation of the building,
A structural face material attached to the outside of the column;
An outer wall material arranged on the outdoor side of the structural face material;
It is a construction method of the outer wall structure provided with the moisture permeable waterproof sheet with protrusions in any one of [1]-[8], Comprising:
Attaching the moisture permeable waterproof sheet with protrusions directly or indirectly to the structural face material with the surface on which the protrusions are formed facing the outdoor side;
Arranging an outer wall material on the outdoor side of the moisture permeable waterproof sheet with protrusions; and
A method for constructing an outer wall structure, comprising: attaching the outer wall material to the pillar with a screw that penetrates the moisture permeable waterproof sheet with protrusions and the structural surface material.

  According to the present invention, a moisture-permeable waterproof sheet with protrusions that can secure a sufficient ventilation space between the structural face material and the outer wall material over a long period of time without using a ventilation trunk edge, a method for manufacturing the same, and An outer wall structure and a construction method can be provided.

It is sectional drawing which shows one structural example of the moisture-permeable waterproof sheet with a protrusion of this invention. It is a top view which shows one structural example of the moisture-permeable waterproof sheet with a protrusion of this invention. It is a disassembled perspective view which shows the example of 1 structure of an outer wall structure. It is sectional drawing which shows one structural example of an outer wall structure. It is a figure which shows the compression test result about the moisture-permeable waterproof sheet with a protrusion of this embodiment. It is a disassembled perspective view which shows an example of the conventional outer wall structure.

Hereinafter, exemplary modes for carrying out the present invention (hereinafter abbreviated as “embodiments”) will be described in detail.
<Moisture permeable waterproof sheet with protrusions>
FIG. 1 is a cross-sectional view showing a preferred embodiment of the moisture permeable waterproof sheet with protrusions of the present invention, and FIG. 2 is a plan view.
In the moisture permeable waterproof sheet 1 with protrusions of the present invention, a first sheet layer 2 having moisture permeability and waterproof properties and a second sheet layer 3 having moisture permeability and heat resistance are bonded together with an adhesive. A plurality of protrusions 4 made of resin are provided at intervals on the surface of the second sheet layer 3 opposite to the side bonded to the first sheet layer 2. It is characterized by.

  Such a moisture permeable waterproof sheet with protrusions 1 is indirectly or directly attached to the structural surface material 14 with the surface on the side where the protrusions 4 are formed facing the outdoor side in the outer wall structure 10 as described later. The ventilation wall 21 can be secured between the structural surface material 14 and the outer wall material 15 by the projection 4 by being attached and the outer wall material 15 being disposed on the outdoor side of the moisture permeable waterproof sheet 1 with the projection. Furthermore, this ventilation space 21 can be maintained over a long period of time.

(First sheet layer)
The first sheet layer 2 having moisture permeability and waterproofness is a sheet that does not allow water to pass through but allows gas (such as water vapor) to pass through. Such first sheet layer 2, is not particularly limited, for example, the surface density of ^60g / ^{m 2 ~120g} / m 2 of polyolefin microporous film, the surface density of 40 g ^{/ m} 2 ~ 120 g / m ² of HDPE (High Density Polyethylene) extra fine continuous long fiber nonwoven fabric is used.

  The first sheet layer 2 is preferably a sheet mainly composed of polyethylene. The first sheet layer 2 is preferably a high-density polyethylene ultrafine continuous long fiber nonwoven fabric from the viewpoint of chemical resistance, breakage, and piercing strength. This non-woven fabric is a three-dimensional web and has air permeability due to the interstices between the fibers, but it also has excellent smoothness due to flat embossing, is hydrophobic from a material called high-density polyethylene, and is breathable (breathable) and waterproof. Are both at the same time.

The thickness of the first sheet layer 2 is, for example, about 0.03 to 0.5 mm, and preferably 0.1 to 0.3 mm (measured with a micrometer MDC-25M manufactured by Mitutoyo).
The basis weight of the first sheet layer 2 is, for example, about 15 to 250 g / m ² , and preferably 50 to 150 g / m ² .

(Second sheet layer)
The second sheet layer 3 having moisture permeability and heat resistance may be woven or knitted as long as it has moisture permeability (breathability), heat resistance and resin adhesiveness. Nonwoven fabric is preferred from the viewpoint.
The nonwoven fabric is not particularly limited, but a thermoplastic synthetic fiber nonwoven fabric is preferable, and a nonwoven fabric by a spunbond method, a thermal bond method, a needle punch method, a water column entanglement method, etc. using fibers having a fiber diameter of 1 to 30 μm. Particularly preferred.

  Examples of the constituent fibers of the nonwoven fabric include polyester fibers such as polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, and copolyester, polyamide fibers such as nylon 6, nylon 66, and copolyamide fibers, polypropylene, and copolymer. Polyolefin fibers such as polypropylene.

  The second sheet layer 3 is preferably made of a sheet mainly composed of polyester. In particular, as the second sheet layer 3, a spunbond polyester long-fiber nonwoven fabric is preferable from the viewpoint of strength, rigidity, heat resistance, and the like.

  The “heat resistance” as used in the present embodiment is not affected by heat during the manufacturing process such as the heat of the molten resin when the molten resin is dropped to form the protrusions 4 and the heat during bonding. Any degree of heat resistance is sufficient.

The thickness of the second sheet layer 3 is, for example, about 0.025 to 0.25 mm, and preferably 0.05 to 0.15 mm (measured with Mitutoyo Micrometer MDC-25M).
The basis weight of the second sheet layer 3, for example, 5 to 50 g / ^{m 2} approximately, 10 to 30 g / ^{m 2} is preferred.

(Projection)
The protrusion 4 is made of a thermoplastic resin. Examples of the thermoplastic resin include a polyamide resin, a polyethylene resin, a polypropylene resin, and a polystyrene resin. Among these, a polyamide resin is preferable.

The height of the protrusion 4 is not particularly limited, but is preferably 3 to 5 mm.
The height of the protrusion 4 formed on the second sheet layer 3 is the width of the ventilation space 21 formed between the structural face material 14 (outer insulation 18) and the outer wall material 15, The ventilation performance in the outer wall structure 10 is determined by the height of the protrusion 4. As a measure of the required ventilation performance, it is reasonable to consider the performance value of the ventilation construction method normally used in the conventional outer wall construction method. Table 1 compares the ventilation performance in the conventional construction method and the ventilation performance (effective opening area (cm ² )) measured by changing the width of the ventilation space.

As the test body, an outer wall structure according to the main construction method having a ventilation space formed by pins assuming projections between an ALC panel as an outer wall material and a plywood as a structural face material, and a ventilation lateral trunk edge were used. An outer wall structure by a conventional construction method was prepared. The dimensions (mm) of the outer wall structure were width 910 × height 910, and the width (mm) of the ventilation space of the test body in this construction method was 2.1, 3.3, and 4.5. The test body in the conventional construction method (ventilated horizontal trunk edge) was made to have a gap of 15 mm for the width of 910 mm in accordance with the ratio of the thickness of the ventilated trunk edge of 15 mm and the gap between the horizontal trunk edges of 30 mm every 1820 mm which is the standard module. .
The lower part of the outer wall structure as a test body was opened, air was flowed into the ventilation layer from above using a fan, and the effective opening area (αA) was determined from the relationship between the pressure and the ventilation rate. Since the relationship varies depending on the pressure, it is generally indicated by a value at a pressure of 9.8 Pa.

  From Table 1, it is inferior to the performance of the conventional construction method when the width of the ventilation space is 2.1 mm, and exceeds the conventional performance at 3.3 mm. Therefore, in order to ensure the width of the ventilation space, it is preferable that the height of the protrusion 4 is 3 mm or more in consideration of the deformation of the protrusion due to the installation. When the height of the protrusion 4 is increased, this performance is further improved. However, increasing the protrusion 4 causes an increase in the amount of resin and a decrease in manufacturing speed. From this viewpoint, the height of the protrusion 4 is 5 mm or less. It is preferable that

  The shape of the protrusion 4 is not particularly limited as long as the ventilation space 21 can be secured between the structural surface material 14 (outer insulation 18) and the outer wall material 15. The cross-sectional shape of the protrusion 4 is not particularly limited. For example, a hemispherical shape, a semi-elliptical shape, etc. are mentioned. Also, the planar shape of the protrusion 4 includes, for example, a circle, an oval, an ellipse, a polygon, and a combination of these.

  Although it does not specifically limit as a magnitude | size (diameter) in the planar view of the processus | protrusion 4, For example, it is preferable that it is 5-10 mm. If the protrusion 4 is too small, it is difficult to ensure the necessary height as described above. If the protrusion 4 is too large, the amount of thermoplastic resin constituting the protrusion 4 increases, leading to an increase in cost.

  It is preferable that the space | interval of the adjacent protrusion 4 is 50-70 mm. If it exceeds 70 mm, a sufficient ventilation space 21 can be secured through the top, bottom, left, and right of the wall surface, but the strength is lowered and the protrusion 4 is crushed. There is a possibility that it is difficult to secure the ventilation space 21 for a long period of time. On the other hand, if the thickness is less than 50 mm, the strength can be ensured, but the number of the protrusions 4 increases, and the amount of the thermoplastic resin constituting the protrusions 4 increases, leading to high costs. If the interval is too small, there is a possibility that a sufficient ventilation space 21 penetrating the top, bottom, left and right of the wall surface cannot be secured. By setting it as the said range, sufficient ventilation space 21 can be ensured over a long period of time between the structural surface material 14 (exterior heat insulating material 18) and the outer wall material 15, preventing the increase in the amount of resin used.

  The arrangement method of the protrusions 4 is not particularly limited, but it is preferable that the protrusions 4 are arranged in a staggered manner as shown in FIG. By arranging the protrusions 4 in a staggered manner, another protrusion 4 is disposed above and below the center of the two protrusions 4 adjacent in the horizontal direction in the figure, so that there is a sheet slack generated between the protrusions 4 during construction. The ventilation performance is ensured.

(adhesive)
The first sheet layer 2 and the second sheet layer 3 are bonded together with an adhesive.
Although it does not specifically limit as an adhesive agent, A polyolefin-type adhesive agent is preferable. Examples of the resin constituting the polyolefin adhesive include a homopolymer of ethylene, a copolymer of ethylene and one or more α-olefins such as propylene, butene-1, hexene-1, and octene-1, and ethylene. Polyethylene resins such as copolymers with polar comonomers such as vinyl acetate and acrylic acid, polypropylene resins such as propylene homopolymers, copolymers of propylene and one or more α-olefins, etc. Is mentioned. Among these, polyethylene resins are preferable because they can be firmly bonded at a melting temperature of 160 to 170 ° C.

<Method for producing moisture permeable waterproof sheet with protrusions>
Next, the manufacturing method of the moisture permeable waterproof sheet 1 with a protrusion as mentioned above is demonstrated.
The method of manufacturing the moisture permeable waterproof sheet with protrusions of the present embodiment includes a step of forming a plurality of protrusions 4 by dropping and cooling a resin melted by heat on the second sheet layer 3;
A step of bonding the second sheet layer 3 on which the protrusions 4 are formed and the first sheet layer 2 with an adhesive.

(1) The thermoplastic resin is dripped onto the surface of the second sheet layer 3 in a state where the thermoplastic resin is thermally melted, and then cooled to cure the thermoplastic resin, thereby forming a plurality of protrusions 4.
The thermoplastic resin is melted in a tank that can be heated in advance.
The thermoplastic resin may be used as it is as the resin alone, but for example, for the purpose of cost reduction, it can be used by foaming as long as the required strength is satisfied. For example, a method of foaming a polyamide resin with nitrogen 2 to 3 times can be mentioned.

(2) The second sheet layer 3 on which the protrusions 4 are formed and the first sheet layer 2 are bonded together using an adhesive.
The sheet of this embodiment as shown in FIGS. 1 and 2 can be manufactured by bonding the second sheet layer 3 on which the protrusions 4 are formed to the first sheet layer 2 using an adhesive. it can.

According to such a method of the present embodiment, the problems of the technique described in Patent Document 2 described above can be solved.
Specifically, for example, the amount of resin used to form the protrusions 4 depends on the height of the protrusions 4 and the distance between them, but the height of the protrusions 4 is 3 mm and the distance between the protrusions 4 is 50 mm. Assuming that, it is about 20 g / m ² (sheet length 1 m). Furthermore, assuming that the line speed is 15 m / min and continuous operation for 6 hours, the total sheet length is 5400 m and the amount of resin used is 108 kg. The size of the tank having this capacity and the difficulty of installation are far less than when a 30-45 m drying line, which is considered necessary for producing the sheet with protrusions described in Patent Document 2, is provided. is there.

For example, when the second sheet layer 3 is a polyester nonwoven fabric, the softening temperature is 200 ° C. or more, and even if a resin melted by heat is dropped, the second sheet layer 3 is not damaged and is practically used. There is no problem.
In the method of the present embodiment, the second sheet layer 3 on which the protrusions 4 are formed in advance is bonded and integrated with the first sheet layer 2 with an adhesive, so that the first sheet layer 2 that is relatively inferior in heat resistance. Is not directly exposed to high temperatures, and problems due to high temperatures can be solved.

<Outer wall structure>
Next, an embodiment of an outer wall structure provided with the above-described moisture-permeable waterproof sheet with protrusions 1 will be described.
FIG. 3 is an exploded perspective view showing a configuration example of the outer wall structure of the present embodiment, and FIG. 4 is a cross-sectional view.
The outer wall structure 10 includes an interior material 11, a column 12 and an intermediary column 13, a structural surface material 14, and an outer wall material 15 in order from the indoor side, and adopts a structure used in a wooden frame wall construction method. Yes.
The interior material 11 constitutes a wall surface on the indoor side of the outer wall structure 10. The interior material 11 is a gypsum board attached to the indoor side of a structural member such as a pillar 12, for example.
A moisture-proof film 16 may be disposed on the outdoor side of the interior material 11.

  The pillar 12 is fixed to a base (not shown) of the building and stands up. Further, an inter-column 13 is disposed between the columns 12.

In order to ensure the heat insulating performance of the outer wall structure 10, a filling heat insulating material 17 may be disposed between the pillars 12 and the intermediate pillars 13 and between the intermediate pillars 13 and the intermediate pillars 13. For example, glass wool having a density of 16 kg / m ³ , fiber-based heat insulating material such as rock wool, or foamed plastic heat insulating material can be used as the filling heat insulating material 17.

  The structural face material 14 is fixed to a frame (not shown) composed of a beam and a base and a column 12 by nailing, and is provided on the outdoor side with respect to the frame and the column 12. In this manner, the frame and column 12 and the structural face material 14 are integrated, thereby exhibiting performance as a structural member.

As the structural face material 14, for example, a structural plywood conforming to Japanese Agricultural Standards having a thickness of 9 mm and a density of 0.55 g / cm ³ can be used.

In order to further improve the heat insulating performance of the outer wall structure 10, an outer heat insulating material 18 can be installed. The outer heat insulating material 18 is provided on the outdoor surface of the structural face material 14. As the external heat insulating material 18, for example, a heat insulating material defined in JIS A 9521 heat insulating material for building can be used. In the case where a foamed plastic heat insulating material is used, it is easy to form as an external heat insulating construction method. Further, among them, the phenol foam heat insulating material is excellent in heat insulating performance, and therefore, when the same heat insulating performance is required, the thickness of the outer heat insulating material can be reduced, which is more preferable. The foamed plastic heat insulating material is attached to the outdoor side of the structural face material 14 using, for example, a nail or a tape.
The moisture permeable waterproof sheet with projections 1 of this embodiment is attached to the outdoor side of the structural face material 14 (outer insulation 18). The moisture permeable waterproof sheet with protrusions 1 is attached to the structural surface material 14 (outer insulation material 18) by, for example, hammering, with the surface on which the protrusions 4 are formed facing the outdoor side.

An outer wall material 15 is disposed on the outdoor side of the moisture permeable waterproof sheet 1 with protrusions.
The outer wall material 15 is a member that forms a wall surface on the outdoor side of the outer wall structure 10. The outer wall material 15 is, for example, a standardized lightweight cellular concrete (ALC) panel used for an industrialized house as a building material. A plurality of the outer wall materials 15 are arranged on the outdoor side (that is, the side opposite to the indoor side) rather than the pillar 12 which is one of the building structures. The end faces of the outer wall members 15 arranged side by side are in contact with each other at the position where the pillars 12 are arranged.
The outer wall material 15 is attached to the column 12 with a screw 19 that penetrates the moisture permeable waterproof sheet 1 with protrusions and the structural face material 14 (outer insulation 18).
An external finishing material 20 (painting material) may be further arranged on the outdoor side of the outer wall material 15.

  In such an outer wall structure 10, the moisture permeable waterproof sheet with protrusions 1 is attached to the structural surface material 14 (outer insulation 18) with the surface on which the protrusions 4 are formed facing the outdoor side. By providing the outer wall material 15 on the outdoor side of the moisture permeable waterproof sheet 1, the ventilation space 21 is secured between the structural surface material 14 (outer heat insulating material 18) and the outer wall material 15 by the protrusion 4. Further, since the protrusion 4 made of resin is sufficiently hard, the ventilation space 21 can be maintained for a long time.

<External wall structure construction method>
The construction method of the outer wall structure 10 includes the following steps:
A step of directly or indirectly attaching the moisture permeable waterproof sheet with protrusions 1 to the structural surface material 14 with the surface on which the protrusions 4 are formed facing the outdoor side;
Disposing the outer wall material 15 on the outdoor side of the moisture permeable waterproof sheet 1 with protrusions; and
Attaching the outer wall material 15 to the column 12 with a screw 19 penetrating the moisture permeable waterproof sheet 1 with protrusions and the structural face material 14.

(1) The moisture-permeable waterproof sheet with protrusions 1 is directly or indirectly attached to the structural face material 14 with the surface on which the protrusions 4 are formed facing the outdoor side.
The moisture permeable waterproof sheet with protrusions 1 is attached to the structural surface material 14 (outer insulation 18) by, for example, hammering using a tucker.
At this time, at the joint portion of the moisture permeable waterproof sheet with protrusions 1, the end portions of the sheets are overlapped with each other with a predetermined width. At this time, since there is the protrusion 4, unevenness is generated in the overlapping portion, and there is a possibility that the attachment to the structural face material 14 (outer heat insulating material 18) is not performed well or it is difficult to secure the ventilation space 21. is there.

  In the moisture permeable waterproof sheet with protrusions 1 according to the present embodiment, the resin protrusions 4 are directly bonded to the second sheet layer 3. In the portion where the two layers are joined together, the first sheet layer 2 may be damaged even if the protrusions 4 provided on the moisture-permeable waterproof sheet with protrusions 1 are removed after the overlapping. No, moisture and waterproof performance is maintained. Thereby, the above-described problems are solved.

  The protrusions 4 formed by the method according to the present embodiment can be scraped off by using, for example, a scraper. However, when the second sheet layer is made of a nonwoven fabric, the work is further easy and The burden is extremely small.

(2) The outer wall material 15 is arranged on the outdoor side of the moisture permeable waterproof sheet 1 with protrusions.
(3) The outer wall material 15 is attached to the column 12 with a screw 19 that penetrates the moisture permeable waterproof sheet 1 with protrusions and the structural surface material 14 (outer insulation 18).

In the outer wall structure 10 of the present embodiment, by using the moisture permeable waterproof sheet with protrusions 1, the structural face material 14 (outer heat insulating material 18) and the outer wall material 15 can be provided without using the ventilator edge. Sufficient ventilation space 21 can be secured over a long period of time.
Further, since the ventilator rim is not used, the material cost of the ventilator rim itself, the construction period and labor cost for attaching the ventilator rim can be reduced.
Even when the moisture permeable waterproof sheet with protrusions 1 is used, the thickness of the outer wall can be kept in the same thickness as when the ventilator edge is used.

  In the above description, the case where the filling heat insulating material 17 is disposed between the pillars 12 and 13 and between the pillars 13 and 13 has been described as an example, but the present invention is not limited thereto. However, the filling heat insulating material 17 may not be arranged. In this case, an air layer is formed between the columns 12 and the inter-columns 13 and between the inter-columns 13 and the inter-columns 13.

Furthermore, in the outer wall structure 10, even when an ALC panel having a thickness of 37 mm is used as the outer wall material 15, the thickness of the moisture permeable waterproof sheet with protrusions 1 is much larger than that of, for example, a 15 mm thick ventilator edge. Therefore, the overhang of the entire outer wall structure can be kept small compared to the standard outer wall.
Therefore, when an opening such as a window is formed in the outer wall structure 10 using a sash, a standardized sash can be used. With the progress of standardization of detached houses, the use of non-standard parts is heavy in terms of parts availability and material costs, and the benefits of using such standardized parts are extremely high. large. Thus, as in the prior art (Patent Document 1), the effect of reducing labor and material costs for newly providing a wood spacer and a draining material is great.

The compression test after the protrusion deterioration process performed on the moisture permeable waterproof sheet with protrusions of this embodiment will be described.
1. Preparation of sheet A polyamide resin is melted by heating to 180 ° C., and a second sheet layer (thickness 0.08 mm (measured with Mitutoyo Micrometer MDC-25M)) made of a spunbond polyester fiber nonwoven fabric, basis weight A plurality of elliptical protrusions (plane size major axis radius 10 mm, minor axis radius 6 mm, height 3.2 mm, by dropping onto the surface of the second sheet layer by dropping it on the amount 18 g / m ² ) (Lattice arrangement with a protrusion interval of 55 to 60 mm).
Sheet made of high-density polyethylene fiber nonwoven fabric as the first sheet layer (thickness 0.17 mm, basis weight 61 g / m ² , moisture permeability resistance 0.12 m ² · s · Pa / μg, waterproof 17 KPa) (Asahi DuPont Flash) Span Products Co., Ltd. Tyvek House Wrap Hard Type) was prepared. By attaching the first sheet layer to the surface opposite to the side on which the protrusions of the second sheet layer are formed, using a polyolefin-based adhesive (weight per unit area 5 g / m ² ), the protrusion-coated transparency is obtained. A wet waterproof sheet was prepared.

2. Test Method (1) Deterioration Treatment Method of Resin Protrusion According to JIS A6111 (moisture permeable waterproof sheet) 7.7 Durability treatment method, after sunshine carbon arc irradiation, 90 ° C. heat treatment was performed. The heating period was 49 days according to JIS regulations, but it was 76 days, which is about 1.5 times as a stricter condition.

(2) Compression test After carrying out the deterioration treatment of (1), pressure was applied to the protruding portion of the sheet, the load and the amount of deformation were measured, and a comparison was made with the case where the deterioration treatment was not performed.
The test piece was a sheet having 6 protrusions, the protrusions were compressed with a universal testing machine TG-5KN, and the compressive force and the amount of deformation (the amount of protrusion collapsed) were measured.

3. Test results Fig. 5 shows the compression test results with and without deterioration treatment.
In addition, in FIG. 5, in order to make it easy to see the deformation amount in the compression force measured in “3.7.1 Compression force measurement at the time of screw driving”, this portion is enlarged and displayed.

Conversion to square meter load The moisture permeable waterproof sheet with protrusions in this experimental example has protrusions of 270 / m ² (working area).
In the compression test, since six protrusions are compressed, the compressive force on the vertical axis in FIG. 5 is multiplied by 270/6 = 45 times to obtain a value in terms of square meters (m ² ).

From FIG. 5, when the compression force (1.94 KN / m ² ) at the time of screwing in the compression test is used, there is no difference in the amount of deformation (the amount of crushing of the protrusion) depending on the presence or absence of the deterioration treatment. The amount was very small, about 0.2 mm.

  When used on the outer wall of a building, it is exposed to environmental factors of decades, but even if it is exposed to a deterioration environment equivalent to the durability regulations of the moisture-permeable waterproof sheet as a base material, When a force corresponding to striking is applied, the amount of crushing (size retention) is similar, and it can be determined that there is no deterioration over time.

  Although the embodiment of the present invention has been described above, the present invention is not limited to this, and can be appropriately changed without departing from the spirit of the invention.

  By using the moisture permeable waterproof sheet with protrusions according to the present invention, a sufficient ventilation space can be secured for a long time between the structural face material and the outer wall material, and it can be widely used as an outer wall structure of a wooden house. .

DESCRIPTION OF SYMBOLS 1: Moisture-permeable waterproof sheet with protrusion 2: 1st sheet layer 3: 2nd sheet layer 4: Protrusion 10: Outer wall structure 11: Interior material 12: Column 13: Inter-column 14: Structural surface material 15: Outer wall material 16: Moisture-proof film 17: Filling heat insulating material 18: Outer insulation heat insulating material 19: Screw 20: External finish material 21: Ventilation space

Claims (13)

A first sheet layer having moisture permeability and waterproof properties and a second sheet layer having moisture permeability and heat resistance are bonded together with an adhesive,
A plurality of protrusions made of resin are provided on the surface of the second sheet layer opposite to the side bonded to the first sheet layer, spaced apart from each other, Moisture permeable waterproof sheet with protrusions. The first sheet layer is made of a sheet mainly composed of polyethylene,
The moisture permeable waterproof sheet with protrusions according to claim 1, wherein the second sheet layer is made of a sheet mainly composed of a polyester.   The moisture permeable waterproof sheet with protrusions according to claim 1, wherein the protrusions are made of a thermoplastic resin.   The moisture permeable waterproof sheet with protrusions according to claim 3, wherein the thermoplastic resin is a polyamide resin.   The moisture-permeable waterproof sheet with protrusions according to any one of claims 1 to 4, wherein a height of the protrusions is 3 to 5 mm.   The moisture-permeable waterproof sheet with protrusions according to any one of claims 1 to 5, wherein an interval between the adjacent protrusions is 50 to 70 mm.   The moisture-permeable waterproof sheet with protrusions according to any one of claims 1 to 6, wherein the protrusions are arranged in a staggered manner.   The moisture-permeable waterproof sheet with protrusions according to any one of claims 1 to 7, wherein the adhesive is a polyolefin-based adhesive. Dropping a resin melted by heat onto a second sheet having moisture permeability and heat resistance, and cooling to form a plurality of protrusions on the second sheet; and
Bonding the first sheet layer having moisture permeability and waterproofness to the surface of the second sheet layer opposite to the surface on which the protrusions are formed using an adhesive;
A method for producing a moisture permeable waterproof sheet with protrusions, comprising: Pillars fixed to the foundation of the building,
A structural face material attached to the outside of the column;
An outer wall material arranged on the outdoor side of the structural face material;
A moisture permeable waterproof sheet with protrusions according to any one of claims 1 to 8, comprising an outer wall structure comprising:
The moisture permeable waterproof sheet with protrusions is directly or indirectly attached to the structural surface material with the surface on which the protrusions are formed facing the outdoor side,
An outer wall material is arranged on the outdoor side of the moisture permeable waterproof sheet with protrusions,
The outer wall material is an outer wall structure that is attached to the pillar by a screw that penetrates the moisture permeable waterproof sheet with protrusions and the structural surface material.   The outer wall structure according to claim 10, wherein a heat insulating material is disposed between the structural surface material and the moisture permeable waterproof sheet with protrusions.   The outer wall structure according to claim 10 or 11, wherein the outer wall material is a lightweight cellular concrete panel. Pillars fixed to the foundation of the building,
A structural face material attached to the outside of the column;
An outer wall material arranged on the outdoor side of the structural face material;
It is a construction method of the outer wall structure provided with the moisture permeable waterproof sheet with a projection according to any one of claims 1 to 8, Comprising:
Attaching the moisture permeable waterproof sheet with protrusions directly or indirectly to the structural face material with the surface on which the protrusions are formed facing the outdoor side;
Arranging an outer wall material on the outdoor side of the moisture permeable waterproof sheet with protrusions; and
A method for constructing an outer wall structure, comprising: attaching the outer wall material to the pillar with a screw that penetrates the moisture permeable waterproof sheet with protrusions and the structural surface material.

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