Moisture permeable waterproof building material sheet

Abstract

To provide a moisture permeable waterproof building material that does not rot lumber constituting a wooden building structure such as a roof board or a wallboard by having high fastening hole waterproofness and quickly eliminating condensation generated on the roof board or the wallboard, can be easily attached to whole surface of the roof board and the like without using a non-moisture-permeable waterproof building material, has moisture permeable property to ventilate moisture, and does not permeate liquid moisture such as water droplet by having windbreaking property as required.SOLUTION: A moisture permeable nonwoven fabric layer 52 consisting of a moisture permeable waterproof resin film 52c and a nonwoven fabric 52d, or a moisture permeable nonwoven fabric layer 52 formed of spunbonded nonwoven fabric is covered by a metal containing layer 11 having moisture permeable pores 15 opened on an upper surface side and attached with a moisture permeable adhesive layer 14 on a lower surface side in a moisture permeable waterproof building material sheet.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a moisture-permeable, waterproof building sheet used for construction of roofs and walls of wooden buildings, particularly for construction of roofs. [Background technology]

[0002] In wooden buildings such as wooden houses, waterproof asphalt-containing or polyolefin sheets that prevent the infiltration of rainwater are laid on the sheathing boards and wall boards that make up the roof as roof and wall bases to prevent the infiltration of rainwater from causing the wooden frame to rot. These base sheets are stored in rolls.

[0003] When laying on a roofing board or the like, the base sheet is unwound from a roll and cut to a desired length. The unwound roll, cutting, and laying are repeated in sequence to cover the entire roofing board or the like. The ends of the base sheets are arranged with a slight overlap so that no gaps are formed between the sheets to prevent the infiltration of rainwater. As a result, the entire roofing board is covered with the base sheet without any gaps. The base sheet is fixed to the roofing board or the like by fasteners such as nails or staples. Therefore, these base sheets are required to have not only waterproofness to prevent rainwater from infiltrating, but also fastening hole water-stopping properties to prevent rainwater from leaking through the fastening holes of the nails or staples even when the nails or staples penetrate the base sheet. Examples of such base sheets include asphalt sheets and moisture-permeable waterproof sheets.

[0004] As an asphalt sheet, for example, Patent Document 1 describes a modified asphalt roofing in which a sand grain layer, an asphalt layer, a base layer, an asphalt-based self-adhesive layer, and a thermoplastic synthetic resin film layer are laminated. With such an asphalt sheet, the flexible and elastic asphalt adheres closely to the nails and staples that penetrate it, and thus exhibits high fastening hole water-stopping properties. Here, it is known that condensation occurs on the sheathing boards and wall boards due to water vapor and moisture generated by human breathing and heating, bathing, and cooking in wooden houses, causing the wood that is the framework of the wooden house to rot. Although asphalt sheets have high waterproofing and fastening hole water-stopping properties, they do not have sufficient moisture permeability, so condensation that occurs between the asphalt-impregnated nonwoven sheet and the sheathing boards, etc., cannot be eliminated. This condensation causes the sheathing boards, etc. to rot.

[0005] Meanwhile, Patent Document 2 describes a composite building material in which a three-dimensional mesh body formed by irregularly crossing continuous filaments is attached to a building material sheet, which is a moisture-permeable, waterproof sheet in which a metal film material having 100 to 2000 μm pores and a nonwoven fabric are integrated with an adhesive. This composite building material has both moisture permeability and waterproofness because the moisture-permeable nonwoven fabric is integrated with a metal film material having a pore size within a certain range so that it does not transmit rainwater but transmits water vapor and moisture, and the three-dimensional mesh body forms a vent between the building material sheet material and roofing materials such as sheathing boards or roof tiles to promote ventilation and prevent the retention of water vapor and moisture, effectively preventing decay of sheathing boards and the like caused by condensation.

[0006] When a nail used for fixing to a sheathing board or a wall board penetrates the sheet for building materials, a hole is formed there. In the sheet for building materials of Patent Document 2, the metal film material is poor in flexibility and elasticity, and the nonwoven fabric has many voids connected in the thickness direction to give moisture permeability. Therefore, gaps are generated between the sheet for building materials, which is merely an adhesive that integrates the metal film material and the nonwoven fabric, and the nail. As a result, rainwater may penetrate through the gaps, and this sheet for building materials has poor nail hole water stopping properties. On the other hand, if a sheet for building materials is made using a nonwoven fabric that does not have interconnected voids or is thicker to give sufficient nail hole water stopping properties, moisture permeability is impaired or reduced. In this case, the water vapor or moisture that is condensation generated on the sheathing board is difficult to penetrate the nonwoven fabric and does not reach the three-dimensional net-like body, and it becomes impossible to prevent the sheathing board from decaying due to condensation.

[0007] Furthermore, when the composite building material having the three-dimensional mesh attached to the building sheet is laid on a roofing board or the like, the three-dimensional mesh prevents the ends of the composite building material from overlapping each other. Therefore, in order to overlap the ends of the composite building material so that no gaps are formed between the composite building materials, the three-dimensional mesh existing at the ends of the composite building material must be cut or removed each time. This makes the laying work complicated.

[0008] In a patent application (Patent Application No. 2022-131216: Patent Document 3), the applicants have already been granted a patent for a waterproof and breathable material which comprises a moisture-impermeable waterproof sheet made of resin and / or rubber and which has openings on the upper surface of the base sheet and recessed portions which are scattered and / or arranged in rows on the underside of the sheet, and anti-slip portions which have at least one anti-slip protrusion selected from non-annular protrusions and / or annular protrusions protruding from the upper surface of the sheet between the openings, and annular protrusions protruding from the upper surface of the sheet while surrounding the openings, wherein the protrusions have deformation recovery or are non-recoverable from deformation, and the recesses have strength such that they do not collapse, and the moisture-impermeable waterproof sheet is flexible enough to be rolled up into a roll. The waterproof and breathable material is made of a non-breathable waterproof sheet, and therefore has excellent waterproofing properties, prevents water leakage from the roof or exterior wall, and allows water vapor and moisture generated inside the house to be discharged from the indoor side to the outdoors through the ventilation sections, which are the gaps between the recesses of the non-breathable waterproof sheet, preventing condensation on the sheathing boards and wall panels and preventing water from accumulating in the recesses, allowing moisture to be discharged outdoors. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Japanese Patent Application Publication No. 11-336266 [Patent Document 2] JP 2013-76210 A [Patent Document 3] Patent application 2022-131216 Summary of the Invention [Problem to be solved by the invention]

[0010] The present invention has been made to solve the above-mentioned problems, and aims to provide a moisture-permeable waterproof building material sheet which has high fastening hole waterproofing properties and can quickly eliminate condensation that has formed on sheathing boards and wallboards, thereby preventing the wood that makes up wooden buildings such as sheathing boards and wallboards from rotting, can be simply attached and laid over the entire surface of sheathing boards etc. without the use of a non-moisture-permeable waterproof sheet, has moisture permeability to allow moisture to pass through, and has windproof properties as needed to prevent the passage of liquid moisture such as water droplets. [Means for solving the problem]

[0011] The moisture-permeable waterproof building material sheet of the present invention, which has been made to achieve the above-mentioned object, is characterized in that a moisture-permeable nonwoven fabric layer consisting of a moisture-permeable waterproof resin film and a nonwoven fabric, or a moisture-permeable nonwoven fabric layer consisting of a spunbonded nonwoven fabric, is covered on the upper side with a metal-containing layer having moisture-permeable holes and attached on the lower side with a moisture-permeable adhesive layer.

[0012] This moisture-permeable waterproof building material sheet may be such that a moisture-permeable nonwoven fabric layer consisting of the moisture-permeable waterproof resin film and nonwoven fabric has water-impermeable, moisture-permeable gaps, pores and / or fusion sites made of nonwoven fibers formed with an adhesive containing a moisture-permeable resin and / or moisture-permeable rubber, and the nonwoven sheets are fused to both sides of a moisture-permeable adhesive layer made of adhesive having adhesive properties and being impermeable to water droplets but having moisture-permeable gaps, pores and / or fusion sites.

[0013] In this moisture-permeable waterproof building sheet, it is preferable that the moisture-permeable adhesive layer is attached onto the nonwoven fabric fibers exposed on the lower surface side without blocking the voids in the nonwoven fabric layer.

[0014] In this moisture-permeable waterproof building sheet, the moisture-permeable adhesive layer is preferably a layer made of a hot melt adhesive.

[0015] In this moisture-permeable waterproof building sheet, the moisture-permeable adhesive layer has a basis weight of 10 to 100 g / m 2 The present invention also provides a layer made of the hot melt adhesive.

[0016] In this moisture-permeable waterproof building sheet, the hot melt adhesive is preferably a tacky synthetic rubber-based hot melt adhesive.

[0017] This moisture-permeable waterproof building material sheet is, for example, such that the nonwoven fabric layer is composed of the moisture-permeable waterproof resin film made of polyethylene terephthalate, polyethylene, or polypropylene, and the nonwoven fabric selected from polyamide (nylon) fibers, rayon fibers, polyester fibers, polyolefin fibers (polyethylene fibers, polypropylene fibers, etc.), acrylic resin, vinylon fibers, polyethylene terephthalate, polybutylene terephthalate, polyamide, rayon, polyester, acrylic resin, vinylon resin, and aramid resin, or the spunbond nonwoven fabric selected from polyamide (nylon) fibers, rayon fibers, polyester fibers, polyolefin fibers (polyethylene fibers, polypropylene fibers, etc.), acrylic resin, vinylon fibers, polyethylene terephthalate, polybutylene terephthalate, polyamide, rayon, polyester, acrylic resin, vinylon resin, polyvinyl acetate resin, and aramid resin.

[0018] In this moisture-permeable waterproof building material sheet, the metal-containing layer is an aluminum foil layer or an aluminum vapor-deposited layer, and the pores have an opening rate of 1.2 to 7.0%, and / or an average diameter or void size of 0.5 to 4000 μm, and / or an opening number of 5000 pcs / m 2 More than 1 million pieces / m 2 The following may be used. Effect of the Invention

[0019] The moisture-permeable waterproof building material sheet of the present invention has excellent waterproofing and / or windproofing properties, prevents water leakage from the roof side or the exterior wall side, and has moisture permeability, allowing water vapor and moisture generated inside the house to be discharged from the indoor side to the outdoors, preventing condensation on the roofing boards and wallboards. Furthermore, since the moisture-permeable waterproof building material sheet has an adhesive layer, particularly a sticky adhesive layer, it can be easily laid by pasting it over the entire surface of a roofing board or the like, and can be pasted and laid on the roofing board while achieving the contradictory effects of having moisture permeability to allow moisture to pass through, but having windproofing properties to prevent the penetration of liquid moisture, especially water droplets.

[0020] The moisture-permeable waterproof building material sheet is installed by attaching the moisture-permeable waterproof building material sheet to the sheathing board and then laying the sheet, and if necessary, laying a waterproof and breathable material on top of it or fixing the battens to the sheathing board with nails, etc., thereby allowing for easy and quick construction.

[0021] The moisture-permeable waterproof building material sheet exhibits the following effects: moisture permeability, which allows only moisture to pass through; waterproofness and / or windproofness (droplet leakage prevention); and fastening hole watertightness, which prevents water droplets from passing through.

[0022] A breathable waterproof sheet made simply of nonwoven fabric will exhibit breathability and ventilation but will be inferior in waterproofing, wind resistance and hole watertightness, whereas this breathable waterproof building material sheet has a metal-containing layer with breathable holes attached to the top surface of the nonwoven fabric and a breathable adhesive layer attached to the bottom surface of the nonwoven fabric, and by adjusting the amount and area etc. of the adhesive layer, it is possible to ensure waterproofing, wind resistance and hole watertightness while maintaining voids in the nonwoven fabric to ensure breathability and breathability, and to adjust the properties so that liquid moisture, especially water droplets, does not pass through.

[0023] This breathable waterproof building sheet meets the standards (JIS A6111:2016) for breathability, wind resistance, waterproofness, and water tightness of fastening holes.

[0024] This breathable waterproof building sheet prevents water leakage from the outdoors by providing wind and water resistance and a waterproof hole seal, while allowing water vapor and moisture from inside to pass through and be discharged outdoors, preventing condensation, thus preventing the decay of roofing boards and the like.

[0025] This moisture-permeable, waterproof building sheet can be easily manufactured and can be quickly and easily applied. [Brief description of the drawings]

[0026] [Figure 1] 1 is a schematic cross-sectional view of a moisture-permeable, waterproof building sheet to which the present invention is applied. [Diagram 2] 1 is a partially cutaway perspective view showing a method of using a moisture-permeable, waterproof building material sheet to which the present invention is applied. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] Hereinafter, embodiments for carrying out the present invention will be described in detail, but the scope of the present invention is not limited to these embodiments.

[0028] The moisture-permeable waterproof building material sheet 1 of the present invention is a moisture-permeable nonwoven fabric layer made of a moisture-permeable waterproof resin film and a nonwoven fabric, or a moisture-permeable nonwoven fabric layer made of a spunbonded nonwoven fabric, covered on the upper side with a metal-containing layer having moisture-permeable pores and attached on the lower side with a moisture-permeable adhesive layer. This moisture-permeable waterproof building material sheet is a moisture-permeable nonwoven fabric layer made of the moisture-permeable waterproof resin film and the nonwoven fabric, which is heat-welded, or a moisture-permeable adhesive layer made of nonwoven fibers formed with an adhesive containing a moisture-permeable resin and / or a moisture-permeable rubber, which has water droplet impermeable and moisture-permeable gaps, pores and / or fusion sites and has adhesive properties, and nonwoven sheets are fused to both sides of the moisture-permeable adhesive layer at the fusion sites of parts of the moisture-permeable adhesive layer.

[0029] More specifically, one embodiment of the moisture-permeable, waterproof building sheet of the present invention is shown in FIG. In this form of moisture-permeable waterproof building material sheet 1, a nonwoven fabric layer 12 which is a spunbond nonwoven fabric consisting of a spunbond nonwoven layer 12a and a moisture-permeable meltblown nonwoven layer 12b made of nonwoven fabric sandwiched between the spunbond nonwoven layers 12a is covered on the upper side with a metal-containing layer 11 having moisture-permeable pores 15 and is attached on the lower side with a moisture-permeable adhesive layer 13 (see Figure 1(a)).

[0030] The moisture-permeable waterproof building material sheet 1 is a roofing base material that is fixed to wood that constitutes a wooden house, such as a roofing board 26. The moisture-permeable waterproof building material sheet 1 is a flexible, long, rollable material that extends continuously in the longitudinal direction.

[0031] The moisture-permeable waterproof building material sheet 1 is shown as an example in which a metal-containing layer 11 with moisture-permeable holes, a moisture-permeable nonwoven fabric layer 12 made of spunbonded nonwoven fabric, and a moisture-permeable adhesive layer 13 are laminated in this order (see Figure 1(a)), but it is preferable that the nonwoven fabric layer 12 is made of spunbonded nonwoven fabric such as polyester.

[0032] In the moisture-permeable waterproof building sheet 1, as shown in FIG. 1(a), a spunbond nonwoven layer 12a is laminated on both sides of a meltblown nonwoven layer 12b. The meltblown nonwoven layer has a density of, for example, 0.26 g / cm 3 More than 0.7g / cm 3 The thickness of the spunbonded nonwoven layer 12a is preferably 20 μm or more and 60 μm or less, and the constituent fibers are preferably not fused to each other, but may be fused. On the other hand, the thickness of the spunbonded nonwoven layer 12a is not particularly limited, but as long as it is within the range of 100 μm or more and 300 μm or less, which is the thickness of the entire nonwoven fabric, it can be appropriately adjusted according to the thickness of the meltblown nonwoven layer 12b. The thickness of the spunbonded nonwoven layer 12a is, for example, preferably in the range of 40 μm or more and 140 μm or less per layer. The thickness of the spunbonded nonwoven layer 12a may be different on both sides of the meltblown nonwoven layer 12b. The density of the spunbonded nonwoven layer 12a is not particularly limited, but is preferably 0.1 g / cm 3 More than 0.8g / cm 3 The following is the result.

[0033] As shown in FIG. 1(b), the moisture-permeable waterproof building material sheet 1 may be formed by laminating in order a metal-containing layer 11 having moisture-permeable holes 15, a nonwoven layer 12d made of nonwoven fabric, a moisture-permeable waterproof resin film 12c, and, if necessary, a further nonwoven layer 12d made of nonwoven fabric, and a moisture-permeable adhesive layer 13.

[0034] The moisture-permeable waterproof building sheet 1 has a moisture-permeable adhesive layer 13 that does not close the gaps in the nonwoven fabric layer 12 and has a basis weight of 10 to 100 g / m on the nonwoven fabric fibers exposed on the lower surface side. 2 , preferably 20 to 100 g / m 2 , more preferably 30 to 80 g / m 2, and even more preferably 30 to 75 g / m 2 , and even more preferably 30 to 50 g / m 2 By attaching it with this material, it has excellent wind and waterproof properties and excellent moisture permeability, prevents water leakage from the roof and exterior walls, and allows water vapor and moisture generated inside the house to be discharged from the indoor side to the outdoors, preventing condensation on the sheathing boards and wall panels, and prevents water leakage by sealing the fastening holes.

[0035] The moisture-permeable adhesive layer is preferably a layer made of a tacky hot melt adhesive, and the hot melt adhesive may be a tacky synthetic rubber hot melt adhesive, such as iMelt PA-17A (trade name, manufactured by Taikyo Corporation), whose main component is synthetic rubber.

[0036] This moisture-permeable waterproof building material sheet 1 is a moisture-permeable adhesive layer having gaps, pores and / or fusion sites that are impermeable to water droplets and moisture-permeable due to nonwoven fibers formed with a hot melt adhesive containing a moisture-permeable resin, and nonwoven sheets are fused to both sides of the moisture-permeable adhesive layer at the fusion sites of the moisture-permeable adhesive layer, and the nonwoven fabric is 0.1 denier or more and 4 denier or less, and the nonwoven fabric layer 12b is made of polyethylene terephthalate or polyamide (nylon), and the nonwoven fabric layer 12b is made of a moisture-permeable material such as polypropylene (OPP). The film may be made of a moisture-permeable waterproof resin film 12c, a moisture-permeable waterproof resin film selected from polyethylene terephthalate, polyethylene, and polypropylene, and a nonwoven fabric selected from polyamide (nylon) fibers, rayon fibers, polyester fibers, polyolefin fibers (polyethylene fibers, polypropylene fibers, etc.), acrylic resin, vinylon fibers, polyethylene terephthalate, polybutylene terephthalate, polyamide, rayon, polyester, acrylic resin, vinylon resin, and aramid resin.

[0037] In the moisture-permeable waterproof building material sheet 1, it is possible to achieve the contradictory effects of having moisture permeability to allow moisture to pass through, while having windproof properties to prevent liquid moisture, especially water droplets, from passing through, by mainly adjusting the adhesive layer 13 and the nonwoven fabric layer 12. By adjusting the basis weight while the adhesive layer 13 is attached to the nonwoven fabric fibers exposed on the lower surface side without blocking the voids in the nonwoven fabric layer 12, the moisture-permeable waterproof building material sheet 1 can exhibit moisture permeability to allow moisture and water vapor to pass through, while exhibiting windproof and waterproof properties that prevent liquid moisture from passing through.

[0038] In the moisture-permeable waterproof building material sheet 1, the metal-containing layer 11 is made of aluminum, for example, and has a thickness of 5 μm or more and 30 μm or less. The opening ratio, which is the ratio of the opening area of ​​the moisture-permeable pores to the surface area of ​​the metal-containing layer 11, for example, an aluminum foil layer or an aluminum vapor-deposited layer, is 1.2% or more and 7.0% or less. The diameter of each moisture-permeable pore is preferably 0.5 to 4000 μm, for example, 0.5 to 3 μm or 3 μm to 0.2 mm, and may be 0.2 mm or more and 4 mm or less, and preferably 3.3 mm or less. There are no particular limitations as long as the opening ratio is within the above range, but it is preferably 5000 pores / m 2 More than 1 million pieces / m 2 It is preferable that the diameter is 5.0 μm or less, and the thickness may be 5.0 μm or more and 30.0 μm or less. Within these ranges, the moisture-permeable, waterproof building material sheet 1 can exhibit moisture permeability that allows moisture and water vapor to pass through, while exhibiting windproof and waterproof properties that prevent liquid moisture from passing through. If the diameter is below this range, it becomes difficult for moisture and water vapor to pass through, while if it exceeds this range, it becomes easy for liquid moisture to pass through.

[0039] In the moisture-permeable waterproof building material sheet 1, the nonwoven fabric is not particularly limited in terms of the total basis weight. For example, the basis weight is 30 g / m 2 More than 120g / m 2 If the following nonwoven fabric is used, the water pressure resistance is at least 100 cmw.c., so the nonwoven fabric alone can meet the requirement of 100 cmw.c. or more as stipulated in JIS A6111:2016, which is the standard for moisture-permeable waterproof sheets. More preferably, the basis weight of the nonwoven fabric is 50 g / m 2 More than 80g / m2 If it is below this value, the balance between moisture permeability, strength, and water resistance is good.

[0040] In the moisture-permeable waterproof building sheet 1, the fibers used in the spunbonded nonwoven layer 12a are preferably 1.5 denier or more and 4 denier or less, and the fibers used in the meltblown nonwoven layer 12b are preferably 0.1 denier or more and 0.3 denier or less.

[0041] If the spunbond nonwoven layer 12a and the meltblown nonwoven layer 12b have the fiber diameter, density, etc. as described above, they can exhibit moisture permeability that allows moisture and water vapor to pass through while exhibiting windproof and waterproof properties that prevent liquid moisture from passing through. If the fiber diameter, density, etc. are below these ranges, it becomes difficult for moisture and water vapor to pass through even if the unattached area and basis weight of the adhesive layer 13 are adjusted, while if the fiber diameter, density, etc. are above these ranges, it becomes easy for liquid moisture to pass through.

[0042] In the moisture-permeable waterproof building sheet 1, the spunbond nonwoven layers 12a on both sides of the meltblown nonwoven layer 12b may be of the same type and thickness, or may be of different types and thicknesses.

[0043] The nonwoven fabric may contain at least one type of fiber selected from polyethylene terephthalate fibers, polybutylene terephthalate fibers, polyamide (nylon) fibers, rayon fibers, polyester fibers, polyolefin fibers (polyethylene fibers, polypropylene fibers, etc.), acrylic resin, vinylon fibers, and aramid fibers.

[0044] It is sufficient that the spunbond nonwoven layer 12a is laminated on both sides of the meltblown nonwoven layer 12b, and the spunbond nonwoven layer 12a may be a plurality of layers. Specifically, a nonwoven fabric selected from the group consisting of spunbond nonwoven layer-meltblown nonwoven layer-spunbond nonwoven layer (SMS), spunbond nonwoven layer-meltblown nonwoven layer-meltblown nonwoven layer-spunbond nonwoven layer (SMMS), and spunbond nonwoven layer-meltblown nonwoven layer-meltblown nonwoven layer-spunbond nonwoven layer (SMMMS) can be used. More preferably, the nonwoven fabric is SMS (one layer of middle meltblown nonwoven layer (M)), SMMS (two layers of middle meltblown nonwoven layer (M)), or SMMMS (three layers of middle meltblown nonwoven layer (M)), which are preferred because they provide stable performance.

[0045] In the moisture-permeable waterproof building material sheet 1, the spunbond nonwoven layer 12a is, for example, a moisture-permeable hot melt adhesive layer having gaps, pores and / or fusion sites 16b that are impermeable to water droplets and moisture-permeable due to nonwoven fibers formed with a hot melt adhesive containing a moisture-permeable resin, and a nonwoven sheet is fused to both sides of the moisture-permeable hot melt adhesive layer at the fusion sites 16b of the moisture-permeable hot melt adhesive layer. This spunbond nonwoven fabric 12a may be, for example, a laminated sheet consisting of a meltblown nonwoven layer 12b sandwiched between the spunbond nonwoven layers 12a. The spunbond nonwoven fabric 12a and the adhesive layer 13 form gaps between the meltblown laminated fibers and the adhesive layer that allow water vapor to pass through, and are entangled and adhered to the screw nail, so that the sheet has moisture permeability, excellent nail hole water stoppage properties, and further wind resistance as necessary. The hot melt adhesive is applied in an amount of, for example, 5 g / m 2 More than 75g / m 2 The upper limit is preferably 50 g / m 2 Less than or equal to 30 g / m 2 More preferably, 20 g / m or less 2 The lower limit is preferably 5 g / m 2 That's all.

[0046] In the moisture-permeable waterproof building material sheet 1, the spunbond nonwoven layer 12a is an aggregate of numerous nonwoven fibers 16, as shown in the partially enlarged schematic cross-sectional view of Fig. 1(a). The nonwoven fibers 16 are formed by spinning a hot melt adhesive containing a moisture-permeable resin by the melt blowing method, and then crushing the nonwoven fibers 16 with a heat-pressing roll (not shown). As a result, the spunbond nonwoven layer 12a has linear regions 16a in which the nonwoven fibers 16 that retain their fibrous shape are irregularly overlapped or entangled, and fused regions 16b in which some of the nonwoven fibers 16 have lost their fibrous shape due to crushing and are fused to each other.

[0047] In the moisture-permeable, waterproof building material sheet 1, the nonwoven fabric preferably has numerous micropores. More preferably, these micropores have an average diameter of 0.1 to 0.3 μm. When the structure of the web made of adhesive is within the above range, water vapor particles with diameters on the order of nm can pass through, but rainwater particles with diameters on the order of several hundred μm to several mm cannot pass through. As a result, the web made of adhesive can have moisture permeability and waterproofness in addition to strong adhesiveness.

[0048] The nonwoven fibers 16 in the fused portion 16b are crushed and expanded in an unhardened softened state by the heat compression process, and are fused together to form a sheet-like shape by losing the fibrous shape in some parts. Therefore, the fused portion 16b at the interface between the meltblown nonwoven layer 12b and the spunbonded nonwoven layer 12a on the bottom side as the base layer and the spunbonded nonwoven layer 12a on the front side as the surface layer is in surface contact with the fibers of both spunbonded nonwoven layers 12a and fused while covering them. As a result, the spunbonded nonwoven layer 12a and the meltblown nonwoven layer 12b are firmly fused together, so that the moisture-permeable waterproof building material sheet 1 having the spunbonded nonwoven layer 12a exhibits waterproofness capable of withstanding a water pressure of 10 kPa or more as specified in JIS A6111:2016, and windproofness as necessary.

[0049] Moreover, since the meltblown nonwoven layer 12b formed with the hot melt adhesive contains a moisture-permeable resin, moisture permeability is not impaired even though it has sheet-like fused portions 16b. Countless fused portions 16b are scattered throughout the nonwoven fabric layer 12. This makes the tensile strength and tear strength of the nonwoven fabric layer 12 much higher than that of an aggregate of fibers that are simply overlapped or entangled while maintaining their fiber shape.

[0050] In the linear portion 16a, the nonwoven fibers 16 overlap and intertwine to form minute gaps and pores between them even without calendaring. Furthermore, the linear portion 16a existing at the interface between the spunbond nonwoven layer 12a and the meltblown nonwoven layer 12b is bonded at points to the fibers of the spunbond nonwoven layers 12a and 12a by the adhesive force of the hot melt adhesive which is the material of the linear portion 16a.

[0051] The width of the gaps or pores in the linear portions 16a is preferably 10 to 80 μm, more preferably 10 to 50 μm, and even more preferably 10 to 30 μm, and thus the gaps or pores exhibit waterproofing by not allowing, for example, drizzle having a diameter of 100 to 500 μm or raindrops having a diameter exceeding 500 μm to pass through, and also exhibit moisture permeability by allowing water vapor particles and steam having a diameter on the order of nanometers to pass through.

[0052] In addition, in the moisture-permeable waterproof building material sheet 1, as shown in FIG. 1(b), the moisture-permeable waterproof resin film 12c, the nonwoven layer 12d, and the adhesive layer 13 can exhibit moisture permeability that allows moisture and water vapor to pass through, while also exhibiting waterproofness that prevents liquid moisture from passing through and windproofness as necessary. If the film thickness of the moisture-permeable waterproof resin film 12c or the fiber diameter of the nonwoven layer 12d is below this range, it will be difficult for moisture and water vapor to pass through even if the unattached area and basis weight of the adhesive layer 13 are adjusted, while if it exceeds this range, it will be easy for liquid moisture to pass through. In addition, this moisture-permeable waterproof building material sheet 1 has waterproofness, fastening hole water stopper, and windproofness as necessary.

[0053] In this way, the moisture-permeable waterproof building material sheet 1 comprises a moisture-permeable nonwoven fabric layer 12 consisting of a spunbond nonwoven layer 12a and a meltblown nonwoven layer 12b, or a moisture-permeable nonwoven fabric layer 12 consisting of a moisture-permeable waterproof resin film 12c and a nonwoven layer 12d, which is covered on the upper side with a metal-containing layer 11 having moisture-permeable holes 15 and attached on the lower side with a moisture-permeable adhesive layer 13, thereby combining excellent wind resistance, moisture permeability, waterproofing, nail hole water stopper properties, and wind resistance as needed, thereby reliably preventing rainwater from entering the house through the roof or walls, while at the same time allowing water vapor inside the house to pass through, preventing the occurrence of condensation.

[0054] When the moisture-permeable waterproof building sheet 1 is used, it can be easily applied by adopting the following configuration.

[0055] The moisture-permeable waterproof building material sheet 1 has a release paper 14 attached to the adhesive layer 13 (see Figs. 1(a) and (b)). When the sheet is wound into a roll, the release paper 14 is peeled off at the construction site, and the moisture-permeable waterproof building material sheet 1 is unrolled and can be easily attached to a roofing board 26 (see Fig. 2). When the moisture-permeable waterproof building material sheet 1 is wound into a roll after a release agent layer is provided on the metal-containing layer 11 so as not to block the moisture-permeable pores 15 (not shown), the moisture-permeable waterproof building material sheet 1 can be simply unrolled and attached to a roofing board 40 without the need to peel off the release paper. The moisture-permeable waterproof building material sheet 1 can be attached to a desired length while remaining long, but is attached by overlapping the edges of adjacent moisture-permeable waterproof building material sheets 1 in the long direction.

[0056] The moisture-permeable waterproof building sheet 1 is attached and laid on a roofing board 26 as shown in FIG. 4, for example, and the crosspieces 21a together with the moisture-permeable waterproof building sheet 1 are fixed to the roofing board 26 by nails 40.

[0057] The moisture-permeable waterproof building material sheet 1 may be connected by being driven into the building with a driving tool such as a staple, tacker, needle, nail, tack, split tack, or hook instead of nails 40, and by being screwed together with a fastening tool such as a bolt and nut or a screw, or by being connected with a connecting tool such as a wire or string.

[0058] Water vapor and moisture that are generated inside a wooden house 20 (see FIG. 2) and permeate the sheathing boards 26 pass through the moisture-permeable waterproof building material sheet 1 and are released from inside the wooden house 20 to the outside. As a result, water vapor and moisture do not accumulate on the sheathing boards 26 or the roofing material 30, so condensation on the sheathing boards 26 is suppressed. Even if some of the water vapor and moisture condenses, it gradually evaporates and is released to the outside.

[0059] Therefore, the moisture-permeable waterproof building material sheet 1 has good ventilation from the indoors or sheathing board 26 to the outdoors or the outside world, and dew is unlikely to remain, so that the dew does not drip onto the sheathing board 26 and dew formation on the sheathing board 26 can be effectively prevented, preventing the sheathing board 26 from decaying, as well as preventing the crosspieces 21a and roofing material 30 from decaying. In addition, the staples, nails 40, etc. used to fasten the crosspieces 21a to the moisture-permeable waterproof building material sheet 1 are not corroded.

[0060] The nail 40 fixed to the roofing board 26 penetrates the moisture-permeable waterproof building material sheet 1. The nail 40 has a sharply pointed tip, a body, and a head with a larger diameter than the body. The moisture-permeable waterproof building material sheet 1 has a thickness and elongation rate within an appropriate range, and therefore has sufficient strength, flexibility, and elasticity. As a result, even if a hole is made by the penetrating nail 40, the moisture-permeable waterproof building material sheet 1 adheres closely to the body of the nail 40 and does not form a gap between the sheet and the nail 40. As a result, the moisture-permeable waterproof building material sheet 1 exhibits high waterproofing properties, fastening hole water stopper properties, and windproof properties as necessary, and does not allow moisture to penetrate into the roofing board 26.

[0061] Adjacent moisture-permeable waterproof building material sheets 1 are overlapped at the edges in the longitudinal direction, so that even if rainwater leaks from the roofing material 30, it cannot enter the room from the roofing material 30 side due to the presence of the moisture-permeable waterproof building material sheet 1. Even if water vapor or moisture from inside the room enters from the underside of the moisture-permeable waterproof building material sheet 1, it can be released to the outside due to the presence of the moisture-permeable waterproof building material sheet 1, so condensation does not occur.

[0062] Furthermore, according to the moisture-permeable waterproof building material sheet 1, the metal-containing layer 11 with the moisture-permeable pores 15, the nonwoven fabric layer 12, and the adhesive layer 13 provide waterproofing properties, fastening hole water-tightness, and, if necessary, wind resistance and moisture permeability, and allow indoor moisture and water vapor to be released to the outside without allowing moisture from the outside to penetrate the sheathing board 26.

[0063] During roof construction, this moisture-permeable waterproof building material sheet 1 is laid on the sheathing boards 26, for example, as follows: A worker unrolls the moisture-permeable waterproof building material sheet 1 from a wound roll, and installs it by attaching it to the eaves 23 side so as to cover the sheathing boards 26. Next, while overlapping the edges of the moisture-permeable waterproof building material sheet 1 in the longitudinal direction, it is sequentially attached to the ridge 21 side, and installed by attaching it to the entire surface of the sheathing boards 26 of the roof 21 portion. If necessary, it is fixed with staples, nails, etc. Next, the crosspieces 21a are fixed to the moisture-permeable waterproof building material sheet 1 and the sheathing boards 26 with nails 40. Finally, the roof 21 is formed by covering and attaching the roofing material.

[0064] This moisture-permeable waterproof building material sheet 1 can be laid to fit the shape of a house roof simply by pasting it on. As a result, the time required to lay the roof underlayment can be reduced compared to conventional methods, and the burden on workers can be reduced.

[0065] A method for producing the moisture-permeable, waterproof building sheet 1 will now be described. First, the moisture-permeable waterproof building material sheet 1 (see FIG. 1(a)), in which a moisture-permeable nonwoven fabric layer 12 made of a spunbonded nonwoven fabric is covered on its upper surface with a metal-containing layer 11 having moisture-permeable pores 15 and attached on its lower surface with a moisture-permeable adhesive layer 13, is produced by preparing a moisture-permeable nonwoven fabric layer 12 made of a spunbonded nonwoven fabric in which a spunbonded nonwoven layer 12a, a meltblown nonwoven layer 12b, and a spunbonded nonwoven fabric 12a are laminated by a spunbonding method or a meltblown spunbonding method, bonding or heat-melting the metal-containing layer 11 having moisture-permeable pores 15 to the upper surface of the nonwoven fabric layer 12 with an adhesive, and applying an adhesive to the lower surface of the nonwoven fabric layer 12 (for example, preferably by spraying). Alternatively, a moisture-permeable waterproof building material sheet 1 (see FIG. 1(b)), in which a moisture-permeable nonwoven fabric layer consisting of a moisture-permeable waterproof resin film 12c and a nonwoven layer 12d is covered on the upper side with a metal-containing layer 11 having moisture-permeable holes 15 and attached on the lower side with a moisture-permeable adhesive layer, is produced by bonding a nonwoven fabric to the moisture-permeable waterproof resin film 12c with an adhesive or by heat melting the nonwoven fabric to prepare the nonwoven fabric layer 12, bonding the metal-containing layer 11 having moisture-permeable holes 15 to the upper surface of the nonwoven fabric layer 12 with an adhesive or by heat melting the metal-containing layer 11, while applying an adhesive to the lower surface of the nonwoven fabric layer 12 (for example, preferably by spraying). After the metal-containing layer 11 is applied by vapor deposition, the moisture-permeable pores 15 may be formed.

[0066] Fig. 2 shows a partially cutaway perspective view of the moisture-permeable waterproof building material sheet 1 being laid on a wooden house 20. The moisture-permeable waterproof building material sheet 1 is a roof underlayment laid evenly on a sheathing board 26. Crosspieces 21a are fixed to the sheathing board 26 together with the moisture-permeable waterproof building material sheet 1 by nails 40. A metal roofing material 30, such as galvalume steel sheet (a registered trademark of Nippon Steel Corporation), is fixed to the crosspieces 21a.

[0067] In winter, the roof 21 separates the cold outdoors from the warm interior of the wooden house 20, which is heated by heating, etc., so that the temperature difference and the water vapor and humidity generated inside the wooden house 20 make it easy for condensation to form on the sheathing boards 26. However, as described above, by providing the moisture-permeable waterproof building material sheet 1 made of a waterproof and breathable material, the water vapor that has permeated the sheathing boards 26 also permeates the moisture-permeable waterproof building material sheet 1 and is discharged to the outdoors, so condensation does not form on the sheathing boards 26 or the battens 61a, preventing them from rotting.

[0068] Moreover, since the moisture-permeable waterproof building material sheet 1 does not transmit water vapor or moisture generated inside the wooden house 20 and has windproof, waterproof, and fastening hole waterproofing properties, this water vapor and moisture does not reach the metal roofing material 30. As a result, the moisture-permeable waterproof building material sheet 1 prevents not only the decay of the sheathing boards 26 but also the corrosion of the metal roofing material 30.

[0069] Furthermore, the roof 20 is sometimes exposed to heavy rain. At this time, rainwater may seep in through the joints between the multiple roofing materials 30 and reach the upper surface of the moisture-permeable waterproof building material sheet 1. The moisture-permeable waterproof building material sheet 1 is highly flexible and elastic, and adheres closely to the surface of the body of the nail 40 that penetrates it, providing high fastening hole waterproofing properties, so that rainwater does not seep into the wooden house 20.

[0070] The moisture permeability, waterproofness, and, if necessary, wind resistance are measured in accordance with JIS A6111:2016 and relate to watertightness. A moisture permeable waterproof building material sheet 1 (see FIG. 1(a)) in which a moisture permeable nonwoven fabric layer 22 made of spunbond nonwoven fabric is covered on the upper side with a metal-containing layer 11 having moisture permeable pores 15 and attached on the lower side with a moisture permeable adhesive layer 23 meets the moisture permeability and waterproofness standards of JIS A6111:2016 and also has excellent wind resistance. In addition, a moisture-permeable waterproof building material sheet 1 (see Figure 42 (b)), in which a moisture-permeable nonwoven fabric layer 12 consisting of a moisture-permeable waterproof resin film 12d and a nonwoven layer 12d is covered on the upper side with a metal-containing layer 11 having moisture-permeable holes 15 and attached on the lower side with a moisture-permeable adhesive layer 13, also complies with the moisture permeability and waterproofness standards of JIS A6111:2016 and has excellent wind resistance.

[0071] The moisture-permeable, waterproof building sheet 1 will be described below.

[0072] The moisture-permeable, waterproof building sheet 1 exhibits waterproof properties by preventing rainwater from passing through, while exhibiting excellent moisture permeability by allowing water vapor and moisture to pass through, and also exhibits excellent wind resistance as required.

[0073] The length (length in the longitudinal direction) of the moisture-permeable waterproof building material sheet 1 is not particularly limited, but should be easy to wind into a roll and easy to unwind, and should be 1 to 100 m, preferably 1 to 10 m. On the other hand, the width (length perpendicular to the longitudinal direction) is not particularly limited, but should be 10 to 1000 mm.

[0074] The roofing material 30 is not limited to metal roofing material, and may be, for example, slate as specified in JIS A5423:2013. Slate roofing material is manufactured by compressing cement and then drying and curing it. Slate roofing material is prone to cracking when it is repeatedly absorbed and dried. When the slate roofing material is laid on the moisture-permeable waterproof building material sheet 1 as a roofing base, the water vapor and moisture generated in the wooden house 20 are prevented from reaching the slate roofing material by the waterproof and breathable material 1, so that the slate roofing material does not absorb water due to condensation, especially in dry seasons (winter on the Pacific Ocean side and summer on the Sea of ​​Japan side). This prevents the slate roofing material from repeatedly absorbing water and drying, and suppresses cracking.

[0075] Meanwhile, the moisture-permeable waterproof building sheet 1 has been described with reference to an example in which it is applied to a roof, but it can also be used when constructing a wall.

[0076] The moisture-permeable waterproof building material sheet 1 can also be used as a base for an exterior wall 22 by being fixed so as to cover the wall panel 22a. In this case, the exterior wall 22 is formed by applying lath 22b, mortar 22c, and paint film 22d on the moisture-permeable waterproof building material sheet 1. When used for the exterior wall 22, the moisture-permeable waterproof building material sheet 1 does not allow rainwater to penetrate into the exterior wall 22 and does not cause condensation due to its excellent fastening hole water-stopping properties and waterproofing, just as when used for the base for a roof 21. As a result, wood, which is the framework of the wooden house 20, such as the sheathing board 26 and wall panel 22a, is not rotten due to rainwater penetration and condensation.

[0077] An example of the moisture-permeable waterproof building material sheet 1 is a multi-layer sheet having holes with a diameter of several hundred μm to several mm that are permeable to water vapor particles with a diameter on the order of nm while not permeating rainwater, in which a metal-containing layer 11 is aluminum-deposited or aluminum foil is bonded with an adhesive on one side of a sheet made of a nonwoven fabric layer 12 made of a resin nonwoven fabric, and a moisture-permeable adhesive layer 13 is laminated on the other side. The moisture-permeable waterproof building material sheet 1 has moisture permeability, waterproofness, and fastening hole water-stopping properties that meet the requirements of JIS A6111:2016. The sheet made of the nonwoven fabric layer 12 may be a synthetic polymer sheet, such as a polyolefin sheet, such as polyethylene or polyvinyl chloride; a polyurethane sheet; a polyvinyl butyral sheet; a thermoplastic elastomer sheet; a polyvinyl acetate sheet, such as an ethylene-vinyl acetate copolymer, a vinyl acetate homopolymer, or a partially or completely hydrolyzed polymer thereof; or a rubber sheet, such as a vulcanized rubber or a non-vulcanized rubber; or an asphalt sheet, such as an asphalt roofing felt. The synthetic polymer sheet is preferably a product conforming to JIS A6008:2002 synthetic polymer roofing sheet, and the asphalt sheet is preferably a product conforming to JIS A 6013:2005 modified asphalt roofing sheet.

[0078] Examples of sheets made of nonwoven fabric layer 12 include commercially available products such as Roof Airtex and Super Airtex KD (manufactured by Fukuvi Chemical Industry Co., Ltd., "Airtex", "Roof Airtex", and "Super Airtex" are registered trademarks of Fukuvi Chemical Industry Co., Ltd.), Lamitect Hi·S (manufactured by Seiren Co., Ltd., "Lamitect" is a registered trademark of Seiren Co., Ltd.), Tyvek (manufactured by DuPont, "Tyvek" is a registered trademark of DuPont), and East Roof Silver (manufactured by Nagai Co., Ltd., "East" is a registered trademark of Nagai Co., Ltd.). The moisture-permeable, waterproof building material sheet 1 may be a laminate in which a metal film material and / or a resin film is bonded or joined to a nonwoven fabric, preferably a laminate in which an aluminum-deposited polyethylene resin film is bonded to a polyethylene nonwoven fabric by heat fusion or adhesive, with an aluminum foil having holes as described above being formed. EXAMPLES

[0079] An embodiment to which the present invention is applied will be described below.

[0080] Example 1 Covered with a 30μm thick porous polyethylene film and laminated to a thickness of 0.8mm, with a basis weight of 180g / m 2 The fiber diameter is 50, 100 and 200 μm, and the basis weight is 65 g / m 2 The nonwoven fabric layer 12 is made of a polyethylene terephthalate nonwoven fabric of SMMMS, and has 1.22 μm moisture-permeable pores 15 at 496,000 pores / m 2 Vapor-deposited aluminum with a density of 30 g / m2 and a count of 106 2 The metal-containing layer 11 is attached to the nonwoven fabric layer 12, and the basis weight is set to 0, 10, 30, 50 and 80 g / m 2 An adhesive layer 13 made of SBR-based iMelt PA-17A (trade name manufactured by Taikyo Corporation) as an adhesive hot melt adhesive was prepared, and a moisture-permeable, waterproof building material sheet 1 with a release paper for covering the adhesive layer 13 as necessary was prepared and wound into a roll (see Figure 1(b)). This moisture-permeable waterproof building material sheet 1 was unwound from a roll and appropriately cut to match the length of a roof or wall to prepare a prototype, which was then used in the construction of the roof or wall.

[0081] The waterproof property and moisture permeability of the obtained moisture-permeable waterproof building material sheet 1 were measured in accordance with JIS A6111: 2016. The results are summarized in Table 1.

[0082] [Table 1]

[0083] As is clear from Table 1, even if the fiber diameter is the same, the water resistance value increases and the moisture permeability value decreases as the basis weight of the adhesive hot melt adhesive increases. On the other hand, even if the basis weight of the adhesive hot melt adhesive is the same, the water resistance value decreases and the moisture permeability value increases as the fiber diameter increases.

[0084] According to the JIS A6111:2016 section on moisture-permeable waterproof sheets, the moisture-permeable waterproof sheet A for walls has a water pressure of 10 kPa or more and a moisture permeability (moisture permeability resistance) of 0.19 (m 2 s Pa / μg) = 190(m 2 ·s·mPa / μg) or less and water resistance is 10(s) or more. To make the waterproofing of the exterior wall moisture permeable waterproof sheet 1000 Pa or more to meet the JIS standard, the amount of adhesive hot melt adhesive applied must be 30 g / m. 3 It is preferable that the fiber diameter is about 50 to 100 μm, but waterproofness decreases when the fiber diameter is 200 μm. In addition, the adhesive hot melt adhesive is 80g / m 3 Above this level, the waterproofing is good, but the moisture permeability is low and it no longer complies with JIS standards. For windproofing, apply 50-100g / m of adhesive hot melt adhesive. 3 It is preferable that the amount is equal to or more than that.

[0085] On the other hand, according to the JIS A6111:2016 section on moisture-permeable waterproof sheets, a moisture-permeable waterproof sheet for roofing has a water pressure of 10 kPa or more and a moisture permeability (moisture permeability resistance) of 0.65 (m 2 s Pa / μg) = 650(m 2 ·s·mPa / μg or less. Windproofness is not regulated. Therefore, as shown in the table, the moisture-permeable, waterproof building material sheets 1 of Examples 1 to 12 almost meet the requirements for a moisture-permeable, waterproof sheet for roofing set forth in the regulation.

[0086] (Example 13) The moisture-permeable waterproof building material sheets 1 of Examples 1 to 12 are A moisture-permeable waterproof building material sheet 1 of Example 13 was obtained in the same manner as in Example 1, except that the shape of the moisture-permeable porous material and the basis weight of the adhesive hot melt adhesive of Example 1 were changed as shown in Table 2. The moisture-permeable waterproof building material sheet 1 was measured for waterproofness, moisture permeability, and wind resistance in accordance with JIS A6111:2016. The results are summarized in Table 2.

[0087] [Table 2]

[0088] Therefore, as can be seen from the table, the moisture-permeable, waterproof building sheet 1 of Example 13 almost meets the requirements for a moisture-permeable, waterproof sheet for roofing set forth in the same regulation. According to the section on breathable waterproof sheets in JIS A6111:2016, breathable waterproof sheet A for exterior walls has a water resistance of 10 kPa or more in terms of water pressure and a wind resistance of 10 seconds or more in terms of wind penetration time. [Industrial Applicability]

[0089] The moisture-permeable, waterproof building sheet of the present invention is used as an undercoat for the roof or exterior wall of a house. [Explanation of symbols]

[0090] Reference numeral 1 denotes a moisture-permeable waterproof building material sheet, 11 denotes a metal-containing layer, 12 denotes a nonwoven fabric layer, 12a denotes a spunbond nonwoven layer, 12b denotes a meltblown nonwoven layer, 12c denotes a moisture-permeable waterproof resin film, 12d denotes a nonwoven layer, 13 denotes an adhesive layer, 14 denotes release paper, 15 denotes a moisture-permeable porous layer, 16 denotes nonwoven fiber, 16a denotes a linear portion, 16b denotes a fused portion, 20 denotes a wooden house, 21 denotes a roof, 21a denotes a batten, 22 denotes an exterior wall, 22a denotes a wall panel, 22b denotes a lath, 22c denotes mortar, 22d denotes a paint film, 23 denotes an eaves, 24 denotes a ridge, 30 denotes a roofing material, and 40 denotes a nail.

Claims

1. This moisture-permeable waterproof building material sheet is characterized in that a moisture-permeable nonwoven fabric layer consisting of a moisture-permeable waterproof resin film and a nonwoven fabric, or a moisture-permeable nonwoven fabric layer consisting of a spunbonded nonwoven fabric, is covered on the upper surface side with a metal-containing layer having moisture-permeable holes, and is attached on the lower surface side with a moisture-permeable adhesive layer.

2. The moisture-permeable waterproof building material sheet according to claim 1, characterized in that the moisture-permeable nonwoven fabric layer consisting of the moisture-permeable waterproof resin film and nonwoven fabric is formed of nonwoven fibers formed with an adhesive containing a moisture-permeable resin and / or moisture-permeable rubber, and has water-impermeable, moisture-permeable gaps, pores and / or fused sites, and is adhesive, and nonwoven sheets are fused to both sides of the moisture-permeable adhesive layer at the fused sites of a portion of the moisture-permeable adhesive layer.

3. 2. The moisture-permeable waterproof building sheet according to claim 1, wherein the moisture-permeable adhesive layer is attached to the nonwoven fabric fibers exposed on the lower surface side without filling the gaps in the nonwoven fabric layer.

4. 3. The moisture-permeable waterproof building sheet according to claim 1, wherein the moisture-permeable adhesive layer is a layer made of a hot melt adhesive.

5. The moisture-permeable adhesive layer has a basis weight of 10 to 100 g / m ２ 5. The moisture-permeable waterproof building sheet according to claim 4, further comprising a layer of the hot melt adhesive.

6. 5. The moisture-permeable waterproof building sheet according to claim 4, wherein the hot melt adhesive is a tacky synthetic rubber-based hot melt adhesive.

7. The moisture-permeable waterproof building material sheet according to claim 1, characterized in that the nonwoven fabric layer is composed of the moisture-permeable waterproof resin film made of polyethylene terephthalate, polyethylene, or polypropylene, and the nonwoven fabric selected from polyamide (nylon) fibers, rayon fibers, polyester fibers, polyolefin fibers (polyethylene fibers, polypropylene fibers, etc.), acrylic resin, vinylon fibers, polyethylene terephthalate, polybutylene terephthalate, polyamide, rayon, polyester, acrylic resin, vinylon resin, and aramid resin, or the spunbond nonwoven fabric selected from polyamide (nylon) fibers, rayon fibers, polyester fibers, polyolefin fibers (polyethylene fibers, polypropylene fibers, etc.), acrylic resin, vinylon fibers, polyethylene terephthalate, polybutylene terephthalate, polyamide, rayon, polyester, acrylic resin, vinylon resin, polyvinyl acetate resin, and aramid resin.

8. The metal-containing layer is an aluminum foil layer or an aluminum vapor deposition layer, and the pores have an aperture ratio of 1.2 to 7.0%, and / or an average diameter or void size of 0.5 to 4000 μm, and / or an aperture number of 5000 pcs / m ２ More than 1 million pieces / m ２ 2. The moisture-permeable waterproof building sheet according to claim 1, characterized in that:

Images