JP2005113678A - Roofing material with adhesive surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a moisture-permeable roofing material that can be fixed to a field without using a zigzag needle and that does not require a release paper that has been conventionally required.
SOLUTION: The present invention is a roofing material made of a laminate having an anti-slip layer, a moisture-permeable waterproof layer, and an adhesive layer, and the adhesive layer is opposite to the anti-slip layer with the moisture-permeable waterproof layer interposed therebetween. The moisture permeability resistance of the laminate is 1.0 m ² · s · Pa / μg or less. In addition, the roofing material of the present invention has a shear adhesive strength of 10 N / 12.5 cm ² or more for the plywood for the base plate on the surface of the adhesive layer, and a shear adhesive force of 50 N / 12. 5 cm ² or less.
[Selection figure] None

Description

  The present invention relates to a roofing material that enhances water leakage prevention (waterproofness) of a roof structure of a building, and in particular, air passes through the back surface of the roofing material that has a dew condensation prevention and moisture release function. By providing an adhesive layer with holes (perforated holes), it is possible to eliminate pinning of spelling needles and to further suppress the intrusion of water from the nail fixing part and to improve the handling at the construction site. Regarding materials.

  Gradient roofs of ordinary houses are wiped up with upholstery materials such as tiles, slate, metal plates. When these topping materials are applied to the top surface of the field material, it is referred to as a lower material that mainly has a waterproof function on the surface of the field plate prior to the construction of the top material, for example, asphalt roofing that is currently mainstream or In general, a synthetic polymer sheet is laid. In addition, as a roofing material (hereinafter referred to as “underlaying material”), it is a spunbond that combines waterproofing, moisture permeability, and watertight sealing around the nail axis in place of moisture-permeable asphalt roofing or synthetic polymer sheets. The use of a nonwoven fabric has also been proposed (see, for example, Patent Document 1).

  In addition, as a method for constructing these underlaying materials, for example, it has been proposed to lay a plurality of underlaying materials from the eaves side to the ridge side in the lateral direction while taking an appropriate overlap. At this time, in order to fix the lower covering material, it is fixed to the base plate side through the lower covering material with a spelling needle. After that, various topping materials are fixed with nails or the like to complete the roof structure. For this reason, the performance of the underlaying material requires a watertight seal against the spelling needle and the nail hole, and various undercoats having improved watertight sealability have been proposed.

  However, the watertight sealing performance of the spelling needle is manifested only when the spelling needle is driven in an ideal state. In actual construction sites, the spelling needle is generally called a hammer tacker. If the lower covering material is fixed on an inclined surface, sufficient water-tight sealability is not exhibited.Furthermore, when the lower covering material is fixed or when the upper covering material is installed, the surface of the lower covering material is It has been a problem that the holes of the needles become large due to wind in the period up to the construction of the lumbering material, and the watertight sealability is deteriorated.

  In addition, in recent years, even in strong winds such as typhoons, the topping material is less likely to fly, so the topping material fixing nail and the nail fixing the pier have also been changed. Although it has been devised to increase the resistance when nails are pulled out to field boards and rafters, it is a cause for lowering the waterproofness of nail holes for underlaying materials, and improvement is required.

  Therefore, there have been proposed a type in which an adhesive layer is provided on the back side of the underlaying material and a method in which the undercoat material is fixed with an adhesive or the like. Not only does it decrease, but there is also a risk of dust and the possibility of getting out of the release paper, and there is a need for improvement. In particular, it is difficult for the roofing material having moisture permeability to use this improvement method because the moisture permeability decreases due to the adhesive or adhesive layer.

JP-A-5-272045 JP 2001-232710 A JP-A-8-209867

  Therefore, the inventors of the present invention, as a result of earnestly examining a moisture-permeable roofing material that can be fixed to the field without using a zigzag needle and does not require a release paper that has been conventionally required. It was completed.

That is, the present invention is a roofing material made of a laminate having a slip-proof layer, a moisture-permeable waterproof layer, and an adhesive layer, wherein the adhesive layer is opposite to the slip-proof layer with the moisture-permeable waterproof layer interposed therebetween. The shear adhesive strength of the adhesive layer surface with respect to the plywood for the base plate is 10 N / 12.5 cm ² or more, and the shear adhesive strength of the adhesive layer surface with respect to the anti-slip layer surface is 50 N / 12.5 cm ² or less. The moisture permeability resistance of the laminate is 1.0 m ² · s · Pa / μg or less.

  Further, in the roofing material according to the present invention, the anti-slip layer is an anti-slip nonwoven fabric, the moisture-permeable waterproof layer is a spunbond nonwoven fabric, or the anti-slip layer is an anti-slip nonwoven fabric, and the moisture-permeable waterproof layer. Is a porous film, or the moisture-permeable waterproof layer is preferably a laminate in which a woven fabric is impregnated or coated with a polyurethane resin.

  Further, in the roofing material according to the present invention, it is preferable that the adhesive layer has a hole through which the air passes, and the hole through which the air passes independently exists in a size corresponding to a diameter of 1 cm or less. It is preferable that the hole through which the air passes is a portion where an adhesive is not applied on the moisture-permeable waterproof layer.

  Since the adhesive layer in the roofing material of the present invention has a specific adhesive property to the field board in use, the roofing material is fixed to the field board without using fixing by a spelling needle. be able to. Furthermore, since the adhesive layer in the roofing material of the present invention has a specific adhesive property to the anti-slip layer surface when winding, the roofing material can be wound and transported and stored without using release paper. It can be used, and at the time of use, it can be used by peeling off the roofing material wound at the construction site. The underlay material of the present invention has good adhesion to the field plate because it is difficult to form a gap between the field and the underlay material without fixing with a zigzag needle. Therefore, it is possible to remarkably improve the prevention of water intrusion from the nail hole (waterproof property of the nail hole), and it has the characteristics of excellent dew condensation prevention and dryness of the field.

  The roofing material of the present invention is an adhesive-type underlaying material, so that it is possible to take up and store it without using a release paper, although it does not require the fixing of the spelling needle. Workability is also good because no trash is produced. Further, since the roofing material according to the present invention is fixed to the field through an adhesive layer, even when the worker walks, there is no displacement between the field and the flooring material, and the walking property is good, and the roof has a large slope. It is also suitable for fields where it is difficult to drive a needle. In addition, if nails are used together when fixing the roofing material to the field, the roofing material is fixed to the field via an adhesive layer, so that the nail hole is difficult to spread, and the fielding from the nail hole of the lowering material Most of the water leakage can be suppressed without water diffusing. Furthermore, since the roofing material of the present invention has moisture permeability, it has an effect of suppressing condensation and promoting drying of the field.

The laminated body used for the roof base material of the present invention has a laminated structure in which an anti-slip layer, a moisture permeable waterproof layer, and an adhesive layer are integrated, and is not particularly limited. According to the measurement method shown, the waterproofness is 10 KPa or more (water resistance of 102 cm or more), the moisture permeability resistance is 0.19 m ² · s · Pa / μg or less, and the pass rate is 80% or more in the nail hole water-stopping test. Can be mentioned.

  The roofing material of the present invention is characterized by comprising a laminate having an anti-slip layer, a moisture-permeable waterproof layer, and an adhesive layer. Hereinafter, the moisture-permeable waterproof layer, the anti-slip layer, and the adhesive layer, which are constituent components of the laminate used in the present invention, will be described in order.

(1) Moisture permeable waterproof layer As the moisture permeable waterproof layer of the present invention, a porous substrate, for example, a synthetic fiber woven fabric, knitted fabric, nonwoven fabric, woven fabric or synthetic paper, or a synthetic polymer microporous film, A moisture permeable rubber sheet etc. can be mentioned. Examples of the material used for the porous substrate include, but are not limited to, synthetic fibers such as nylon, polyester, polyamide, and polyurethane, or synthetic polymer films and sheets. , Semi-synthetic fibers such as acetate, or semi-synthetic polymers, and natural fibers such as cotton, hemp, and wool may be appropriately combined. Among these materials, it is preferable to use polyolefin resins such as polyethylene and polypropylene. Among these porous substrates, it is preferable to use a woven fabric, a knitted fabric or a nonwoven fabric having a high porosity from the viewpoint of moisture permeability, and a microporous film or the like may be used from the viewpoint of waterproofness. preferable.

Examples of the microporous film include a plastic elastomer film containing one or more synthetic polymers such as polyethylene, polypropylene, vinyl alcohol, and polyurethane having microporosity. These microporous films preferably have a thickness of 50 to 300 μm and a Young's modulus of 1 to 30 kg / mm ² . These microporous films, moisture permeability is preferred to use 2,000g ^/ m ^2/24 hours or more films, it is more preferred to use 5,000g ^/ m ^2/24 hours or more films . A film having such physical properties can be produced, for example, according to the method disclosed in Patent Document 2.

Among woven fabrics, knitted fabrics, and nonwoven fabrics, it is preferable to use a nonwoven fabric from the viewpoint of cost and the like. When nonwoven fabric is used as the moisture permeable waterproof layer, it is not limited by the method such as spunbond or needle punch or the material used, but the tensile strength is 10 kgf / 3 cm or more, the water resistance is 100 cm or more, and the moisture permeability resistance. Is preferably 0.19 m ² · s · Pa / μg or less. The nonwoven fabric having such physical properties can be produced by a flash spinning method using a polyolefin resin such as polyethylene and polypropylene, and is commercially available as “Tyvek (trademark)” from Asahi DuPont Flash Spun Products, for example.

Furthermore, it is a non-woven fabric with high water resistance to nail holes, that is, a flash spinning three-dimensional network fiber nonwoven fabric with a basis weight of 60 to 200 g / m ² , a water pressure resistance of 2500 mmH ₂ O (water resistance of 250 cm) or more, and a moisture permeability of 2500 g / m ² / It is more preferable to use a nonwoven fabric that is 24 hours or longer. The above non-woven fabric not only has excellent moisture permeability, water resistance and nail hole water resistance, but also has excellent physical strength (ie, tensile strength, water pressure resistance and moisture permeability) as a single sheet, and is resistant to secular change. Is excellent. These sheets can be manufactured according to the method described in Patent Document 3, for example.

Sheets such as the above-mentioned nonwoven fabric and film used as the moisture permeable waterproof layer may be used as they are, but a specific treatment may be applied to the surface thereof. For example, in order to improve the nail hole water resistance of the film, a known superabsorbent polymer such as polyacrylate or maleate, rubber resin such as butyl rubber, styrene-butadiene rubber or the like is used for the porous substrate. You may apply | coat to the surface or may make a porous base material impregnate resin. Further, in order to improve water repellency and waterproofness, a fluorine-based, silicon-based or wax-based drug may be applied to the surface of the porous base material or impregnated with the drug. Alternatively, for example, a polyurethane resin solution may be applied to one or both sides of the porous base material, and then dried to form a polyurethane film to improve waterproofness. By performing such treatment, the water pressure resistance can be improved without significantly reducing the moisture permeability of the film. For example, a film having a water pressure resistance of 10,000 to 40,000 mmH ₂ O and a moisture permeability of 4,000 to 8000 g / m ² · 24 hours can be obtained by producing according to JP-A-11-131373. Further, for example, a predetermined amount of particles can be mixed in a polyurethane solution, and the obtained slurry can be coated on the porous substrate and dried with hot air to obtain a film. Alternatively, when a microporous film is used as the porous substrate, the microporous film is impregnated in a coagulation liquid mainly composed of water, and the solvent DMF (N, N-dimethylformamide) is removed into water. By doing so, the polyurethane may be gelled, washed with water and dried. Furthermore, a polyurethane film may be prepared, and the obtained film may be laminated on a porous substrate using an adhesive as necessary. Even with such treatment, the water pressure resistance can be improved without significantly reducing the moisture permeability of the film. For example, by manufacturing according to JP-A-2002-241518, a moisture-permeable waterproof sheet having a water pressure resistance of 2,000 mmH ₂ O or more and a moisture permeability of 3,000 g / m ² · 24 hours or more can be obtained. it can.

  As described above, as the moisture-permeable waterproof layer of the present invention, from the viewpoint of strength and anti-slip properties, the above porous base material is impregnated in polyurethane resin, or a laminate coated with polyurethane resin is used. Is preferred.

(2) Anti-slip layer The laminate used for the roofing material of the present invention is also characterized by having an anti-slip layer. The roof underlaying material is provided with a slip-proof layer so that there is no risk that the contractor slides his / her feet because the contractor walks on the roof during work. The surface is provided with an anti-slip function. The frictional resistance (see Examples) of the anti-slip layer surface (walking surface) of the roofing material is 0.3 or more, and preferably 0.5 or more so that the installer does not slide his / her feet. As shown below, the anti-slip layer exhibiting these friction coefficients can be obtained by subjecting the moisture-permeable and waterproof layer to various known anti-slip treatments.

  As a method of providing an anti-slip layer, a method of adhering using a binder such as an aggregate, a foaming agent, and various powders, a hot melt agent or the like that melts and exhibits adhesiveness in a dot shape or a streak shape Any method such as bonding may be used. At this time, mineral particles such as sand are used as aggregates, and low-boiling hydrocarbons such as n-butane, i-butane, pentane and neopentane are included in the core material as foaming agents, and vinylidene chloride, acrylonitrile and methyl methacrylate are included. (Meth) acrylic acid ester, foamable microcapsules with a wall film made of a thermoplastic resin whose main component is an aromatic vinyl compound such as styrene, synthetic resin particles, metal powder, glass beads as powder Plastic beads can be used. As the binder to be bonded, any of acrylic, urethane, styrene / butadiene, ethylene / vinyl acetate, vinylidene chloride and the like can be used. In addition, various coating methods and printing methods such as knife coater, gravure coater, kiss coater, bar coater are possible as the adhesion method, but if the binder is coated on the entire surface of the sheet, the original moisture permeability of the sheet is impaired, so the dot It is preferable to coat the binder in the form of stripes or stripes.

In addition, as a method for laminating a nonwoven fabric or the like as a non-slip layer on a moisture permeable waterproof layer, that is, as a laminating method, dry laminating, wet laminating, thermal laminating and the like can be exemplified, and a suitable method is suitably selected from these. Can be selected and used. As the adhesive, any resin such as a solvent type, an emulsion type and the like may be used. As explained above, as the non-woven fabric used as the anti-slip layer, a non-woven fabric that can be used as a moisture permeable waterproof layer, if the surface is subjected to a specific treatment as described above, if necessary, is used. Good. From the viewpoint of not lowering the moisture permeability of the entire roof under roofing materials, moisture permeability such as a nonwoven fabric for use as anti-slip layer is preferably 2000g / m ^2/24 hours or more, at 5000g / m ^2/24 hours More preferably it is.

  In this way, the anti-slip layer can be formed on the moisture permeable waterproof layer by laminating the anti-slip solution or the non-slip non-woven fabric. When using a non-woven fabric having the above-mentioned frictional resistance, it is preferable to laminate the non-slip layer on the moisture-permeable and waterproof layer. When a non-woven fabric having a certain thickness is laminated on the moisture-permeable waterproof layer, the anti-slip layer can also be provided with cushioning properties, and slipping during walking can be further reduced. In order to give cushioning properties to the anti-slip layer, the thickness of the nonwoven fabric is preferably 0.1 mm or more, more preferably 0.2 mm or more, and the porosity of the nonwoven fabric is preferably 70% or more. . In addition, the nonwoven fabric is preferably manufactured by a spunbond method using synthetic fiber as a raw material from the viewpoint of being hardly damaged even when rubbed with a shoe sole, and polypropylene, polyethylene, It is more preferable to use a nonwoven fabric mainly composed of polyester or polyamide.

  Furthermore, as a laminate comprising a moisture-permeable waterproof layer and a slip-proof layer, the above-mentioned known nonwoven fabric, synthetic paper, microporous film, moisture-permeable rubber sheet and the like are integrated with a suitable adhesive, A laminated sheet integrated with a sheet holding a water-absorbing polymer or a highly water-absorbing polymer may be formed and used, but when providing a sheet holding a highly water-absorbing polymer as an intermediate layer, at least an anti-slip nonwoven fabric and It is preferable that it is a laminated body comprised from a porous film.

(3) Adhesive layer The laminate used for the roofing material of the present invention has an adhesive layer on the opposite side of the anti-slip layer with the moisture-permeable waterproof layer interposed therebetween. Examples of the material for providing the adhesive layer of the present invention include rubbers such as natural rubber, SBR, butyl rubber, and isobutylene, acrylics based on acrylic acid esters as main raw materials, peroxide-curing and addition-type silicones, and hot melts. Styrene / isoprene / styrene, energy ray curable acrylic, tackifier resin, and the like. Among these, it is preferable to use acrylic or hot melt resins. These materials can be used as a pressure-sensitive adhesive by being dissolved or dispersed in a solvent, such as a solvent system, an emulsion system, a heat melting system, or a liquid curing system. As the solvent, water, various alcohols, and the like can be used. As a coating method, various coating methods and printing methods such as a knife coater, a gravure coater, a roll coater, and a comma coater can be used.

  In the present invention, it is preferable that the adhesive layer provided on the opposite surface of the moisture permeable waterproof layer to the anti-slip layer does not impair the original moisture permeability of the moisture permeable waterproof layer (for example, the moisture permeable waterproof sheet). For this reason, the adhesive layer is preferably a moisture-permeable layer, preferably a layer (a perforated layer) in which pores through which air passes are present throughout the layer. In addition, when the roofing material of the present invention is used by fixing it to a field board, in order to improve the adhesiveness between the field board and the roofing material and make it difficult to form a gap, The hole through which the air passes, that is, “the portion where the adhesive is not applied on the moisture-permeable waterproof layer” may exist independently with a diameter corresponding to 1 cm or less, preferably 0.5 cm or less. preferable.

  Such air holes can be applied to the moisture-permeable waterproof layer by appropriately adjusting the type, amount of adhesion, and application method of the material to be applied as the adhesive layer. An unexposed portion can be formed in the adhesive layer. Such an adhesive layer is formed by, for example, selecting a pattern (pattern) to be applied to a gravure coater on the surface opposite to the anti-slip layer of the moisture-permeable waterproof layer, a moisture-permeable waterproof layer, or an anti-slip layer. And a method of applying the entire surface of the nonwoven fabric used as a moisture permeable waterproof layer so that the thickness of the adhesive layer is 20 μm or less, so that it adheres only around the yarn constituting the nonwoven fabric, solids such as various powders, etc. And known adhesive coating techniques, such as applying a porous solution by mixing a gas such as air with a coating solution, or applying a hot melt adhesive in a thread shape Can be provided using.

The application conditions and the amount of adhesion for forming the adhesive layer as described above may be appropriately selected so that the moisture permeability resistance of the roofing material of the present invention is 1.0 m ² · s · Pa / μg or less. .

Further, when the roofing material of the present invention is used by being bonded to a field board (via an adhesive layer), the shear adhesive force between the surface of the adhesive layer and the field board (plywood) is 10 N / 12. .5Cm ² or more, preferably in the range of ^{15N / 12.5cm 2 ~50N / 12.5cm 2} .

If the shear adhesive strength for this plywood for field plate is smaller than 10N / 12.5cm ^{2, the} roofing material will be easily slipped off when the worker walks during construction, and the roofing material will be peeled off from the field and waterproofing the nail holes. It is not preferable because the property is not improved. In addition, "the shear adhesive force with respect to the plywood for field boards" is JIS Z0237 reference as described in the following measuring method (2). Measured according to "Shear adhesive strength test method".

Further, when the roofing material of the present invention is peeled off after being wound up so that the adhesive layer appears on the surface (that is, when the adhesive layer and the anti-slip layer of the roofing material are adhered and then peeled off), walking shear adhesion between the surface to become non-slip layer surface and the adhesive layer surface, 50 N / 12.5 cm ² or less, preferably ^{20N / 12.5cm 2 ~5N / 12.5cm 2} . Thus, by setting the shear adhesive strength (hereinafter referred to as “shear adhesive strength to the walking surface”) of the adhesive layer surface to the walking surface (anti-slip layer surface) to 50 N / 12.5 cm ² or less, It can be easily peeled off when used after being rewound from the state wound at the construction site. If the shear adhesive strength is greater than 50 N / 12.5 cm ² , not only is it difficult to peel off, but peeling from the wound state may damage the roofing material itself, which is not preferable. In addition, "shear adhesive strength with respect to a walking surface" is JIS Z0237 reference as described in the following measuring method (3). Measured according to "Shear adhesive strength test method".

  As described above, the roof underlay material of the present invention is used after being rewound from the wound state, and therefore various release agents are provided so that the adhesive in the adhesive layer is less likely to adhere to the anti-slip layer surface. It is preferable. As such a releasing agent, silicone-based, long-chain alkyl polymer-based, fluorine-based or wax-based polyolefin-based releasing agents can be used, but the friction resistance of the anti-slip layer surface should be 0.3 or more. It is preferable to use a long-chain alkyl polymer-based or polyolefin-based release agent in that the surface can be made difficult to slip even when wet.

(4) Roofing material according to the present invention The roofing material according to the present invention is composed of the laminate having the anti-slip layer, the moisture-permeable waterproof layer, and the adhesive layer as described above, on both surfaces of the moisture-permeable waterproof layer. The anti-slip layer and the adhesive layer are provided, but the manufacturing method is not particularly limited. The roofing material of the present invention can be wound on a roll without using a release paper, and before use, the adhesive layer is preferably wound and stored so that it is on the outer side of the winding. Store with release paper or release film. The roofing material of the present invention has a moisture permeability resistance measured based on JIS-A6111 of 1.0 m ² · s · Pa / μg or less, preferably 0.5 m ² · s · Pa / μg or less. More preferably, it is 0.19 m ² · s · Pa / μg or less. When the moisture permeability resistance is greater than 1.0 m ² · s · Pa / μg, it is not preferable because it prevents dew condensation and prevents drying of the field. The roofing material of the present invention preferably has a water resistance of 51 cm (5 kPa) or more, and more preferably 20 KPa or more, as a waterproof property. The thickness of the roofing material is not particularly limited, but is preferably 0.3 to 20 mm from the viewpoint of workability and the like.

  Furthermore, the roof base material of the present invention may be subjected to a known process (for example, a process described in JP-A-10-280623) such as a process for enhancing durability, weather resistance, and waterproofness. In particular, it is preferable that coloring is performed so as not to be blinded during construction, and an overlapping portion of the roofing material to be laid, a place where the spelling needle is driven, a method during construction, and the like are preferably printed or colored. Further, when walking, the surface strength of the roofing material may be improved by applying a known resin coating or impregnation in order to prevent the surface of the roofing material from being damaged or torn. Surface strength is the fastness of dyeing against JIS-L0849 friction (Friction tester 2 type 6.1 (2) condition, JIS-L1096 6.17 wear test c method (Taber type method) In this case, class A is preferred.

  As a method for constructing the roofing material of the present invention, a plurality of lowering materials are laid in the transverse direction from the eaves side to the ridge side in the same manner as in ordinary roofing, with appropriate overlap. At this time, in order to fix the lower covering material, it is preferable to apply pressure to the base plate side by applying pressure with a pressure roller or the like. In addition, when using a spell needle according to the type and condition of the field and the roof slope, it is preferable to use it for the lower layer of the overlapping part of the roofing material, and virtually no spell needle appears on the surface, waterproofing performance Does not decrease. As a method for fixing the overlapping needles, there is a fixing method described in Japanese Patent Application Laid-Open No. 2002-294941.

Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited thereto.
Each physical property of the underlaying material in the examples was measured by the following measuring methods.

(1) Friction resistance Plywood (ordinary plywood 1 type 1 or the like as defined in JAS) is used as a field material, and fixed with double-sided tape on a smooth stainless steel plate so that the back side of the underlaying material becomes the surface. Then, after contacting the surface of the field material and the back surface of the underlaying material, a load of 2 kg is placed on the field material, the field material is pulled at a speed of 100 mm / min, and the friction force (when the field material begins to slide) (Tensile stress) was measured at n = 5 and expressed as the average.

(2) Shear adhesive strength for plywood for field plate The shear adhesive force for plywood for field plate is JIS Z0237. Measured according to the method described in “Shear adhesive strength test”. Specifically, first, three test pieces having a width of 25 mm and a length of 150 mm are prepared. In addition, as a test board, a plywood for a field board made of “birch” made by Kanna is used. Then, the shear adhesive force is measured according to the following procedure.
(I) Adhere the adhesive sheet (test piece) to the test plate along the center line in the length direction. At this time, the test piece is bonded so that the adhesion surface thereof is 50 mm in the length direction and overlaps the test plate (that is, the adhesion area becomes 12.5 cm ² ).
(II) Apply 49N (5kgf) force for 15 minutes to the bonded part and press-fit.
(III) Immediately after crimping, use a tensile tester so that the center line of the test piece and the center line of the grip are in a straight line, and the force applied to the test piece is applied in parallel to the center line of the test piece. The force [N / length (cm) × width (cm)] when pulling and peeling off at a speed of 300 ± 30 mm or when the test piece is cut is obtained.
(IV) Conduct the test three times and obtain the average value.

(3) Shear adhesive strength to the walking surface (shear adhesive strength of the adhesive layer surface to the anti-slip layer surface)
The shear adhesive strength for the walking surface is JIS Z0237 as in (2) above. Measured according to the method described in “Shear adhesive strength test”. That is, as the test plate, instead of the plywood for the field plate, the roofing material of the present invention is used, and the anti-slip layer surface (walking surface) is bonded so as to be in contact with the adhesive surface of the adhesive sheet. The measurement is performed by the same method as in (2) “Shearing adhesive strength for plywood for base plate” except that.

(4) Waterproof (water resistance)
JIS-L-1092 (1998) Waterproof test method 4. (1) Water resistance test Measured by method A (hydrostatic pressure method) and expressed as an average (KPa).

(5) Moisture permeability resistance This is represented by moisture permeability resistance defined in JIS A6111.6.2.

(6) Nail hole water blocking structure A structure with a steel nail hole N50 (JIS-A-5508 specified) on a 12 mm-thick plywood (ordinary plywood specified by JAS, etc.) Drive to the extent that it passes through the body, and in accordance with JIS-A-5430 5.6 (water permeability test), a PVC pipe is set up in the nail driving portion. Water is poured into this to a height of 150 mm, and the reduced water height after 24 hours is examined. Measured with n = 10, and the pass was regarded as a reduced water height within 1 mm, and the pass rate (%) was expressed.

  Next, the evaluation method of the test body using the underlay material of the present invention and the undercoat material of the comparative example will be described.

(7) Workability (walking stability)
A test in which the roofing material of the example was covered with a base plate (12 mm thick plywood: ordinary plywood 1 type 1 or the like specified in JAS) while rolling, and then the entire surface was lightly crimped and fixed by hand. A body was prepared, and this specimen was fixed to a gradient of 5 dimensions (Tanθ = 0.5) and 8 dimensions (with handrails), and the slipperiness of the underlaying material when the operator walked (surface slip resistance) ) And the adhesion between the field and the underlaying material is evaluated according to the following criteria.
Anti-slip surface No slipperiness: ○
There is a feeling of slipping: ×
Adhesion The field and underlaying material are in close contact during walking ○
When walking, underlaying material can move or wrinkle on the surface of the field ×

  For the roofing material of the comparative example, use a hammer tucker (TH-P manufactured by Max Co., Ltd.) so that the entire surface of the roofing material of the comparative example is about 30 cm after being covered while rolling the baseing material of the comparative example. A test specimen was prepared in the same manner as the roofing material of the above example except that the specimen was prepared by fixing with a spelling needle (Max 1310JB shoulder width: 10 mm, foot length: 13 mm). After that, the surface slip resistance and the adhesion between the field and the underlaying material are evaluated.

(8) Needle leakage prevention property The roof underlaying material of the example is covered with a field plate (12 mm thick plywood: a normal plywood class 1 or the like as defined in JAS) and covered with the field plate. Is lightly crimped by hand and fixed, and then punched with a hammer until it penetrates the base plate at 10 locations with a screw nail (13 # 2.4Φ length 65 mm SUS304 Onchi Steel Co., Ltd.). A test specimen is created by driving with a screwdriver nail (4Φ 35mm in length, SUS410, manufactured by Wakai Sangyo Co., Ltd.) until it penetrates the 10 ground plates (approx. 15mm).

Next, this test body is fixed to a three-dimensional gradient, and a shower test is performed under the following conditions.
(Conditions) No topping material (tile), precipitation: 80 mm / m ² / hour, test time: 1 hour After shower test, is the baseplate wet due to water leakage from the nail fixing point and intrusion water from the overlapping part? Is determined visually. The case where the wetness of the base plate is 1 cm or more in diameter is counted as water leakage, and the result indicates the number of water leakages in the nail fixing points by the defect rate (number of water leakage points / number of nail fixing points). In addition, using a screw needle instead of a screw nail, a test body is prepared in the same manner as described above, a shower test is performed in the same manner, and a needle water leakage prevention failure rate is measured.

  As for the under roofing material of the comparative example, after covering the base plate with the rolling base material of the comparative example, the entire surface of the roof hammer hammerer (TH-P manufactured by Max Co., Ltd.) is about 30 cm. Except that the specimen is prepared using a screw needle or screw nail in the same manner as described above after fixing with a spelling needle (Max 13 Co., Ltd. 10 13JB Shoulder width: 10 mm, Foot length: 13 mm). In the same way as in the case of the roofing material in the example, after preparing a test body, a shower test is conducted, and the result is spelled out to indicate how many water leaks in the needle fixing point (number of water leaking points / nail fixing points). Number).

Moreover, the value measured by the following method is also shown about the physical property of the material which can be used for the roofing material of this invention.
(A) Moisture Permeability: Based on JIS-L-1099 breathable Test Method A-1 method (calcium chloride method), measured at n = 3, represented by the average (g / m ^2/24 hours).
(B) Tensile strength: In accordance with the JIS-L-1096 tensile strength and elongation test method, a sample having a width of 3 cm and a length of 20 cm was gripped using a constant-speed extension type Tensilon tensile tester, with a grip interval of 10 cm and a tensile speed of 20 cm. Measured under the condition of / min. It measures by n = 5 each in length and width, obtains an average value, and expresses the average of both (kgf / 3 cm).
(C) Water pressure resistance: JIS-L-1092 water resistance test method Based on the high water pressure method, measured at n = 5 and expressed as an average (mmH ₂ O).

Next, the underlaying material of Examples and Comparative Examples will be described.
(Example 1)
Gravure coating of polyester non-woven fabric (A5040 made by Asahi Kasei Co., Ltd. thickness 0.17mm, porosity 77%) with hydrophilic foam paint (PS-2 foam capsule-containing acrylic latex and wax resin made by Yamabun Yuka Co., Ltd.) It was applied at a solid content of 10 g / m ² by the method (plate depth 60 μm, full surface coating) and dried at 130 ° C. for about 2 minutes to obtain a non-slip nonwoven fabric. It was 8000 g / m < ² > / 24 hours when the moisture permeability of this nonwoven fabric was measured.

Polyethylene non-woven fabric “Tyvek (registered trademark) 1082B” manufactured by flash spinning as a moisture-permeable waterproof sheet having water resistance to nail holes (mass per unit area 105 g / m ² , manufactured by Asahi DuPont Flash Spun Products Co., Ltd., thickness 0.26 mm, transparent humidity 5500g / m ^2/24 hours, water resistance 220 cm, Kugianatome aqueous: using pass rate of 100%), a dry lamination method (solid adhering amount using the above-slip resistant nonwoven phthalate polyester resin thereon 5 g / m ² , 40% adhesion area lattice pattern), and a laminate having an anti-slip function was obtained.

Next, an acrylic pressure-sensitive adhesive (acrylic ester, polysol SUM-1201, Showa High) was formed on the surface (Tyvek surface) opposite to the non-slip non-woven fabric surface of the laminate by gravure coating method (plate depth 60 microns, lattice pattern: pattern). (Manufactured by Molecular Co., Ltd.) was attached to obtain a roofing material.
<Pattern> Line thickness: 5 mm (vertical flow, horizontal flow), pitch: 5 mm (uncoated part: 5 mm square), occupied area ratio 75%, adhesion amount about 12 g / m
About the roofing material obtained in this way, according to the above measurement method, friction resistance, shear adhesive strength (to ground base plate), shear adhesive strength (shear adhesive strength to the walking surface), waterproofness (water resistance), Moisture permeability resistance and nail hole water resistance were measured, and the results are shown in Table 1. Similarly, the workability (walking stability) and needle leakage prevention properties of the obtained roofing material were measured, and the results are shown in Table 2.

(Example 2)
In Example 1, a synthetic resin adhesive (HW1073 non-slip varnish manufactured by Toyo Ink Co., Ltd.) was used instead of an acrylic adhesive as an adhesive to be attached to the opposite surface of the anti-slip nonwoven fabric of the laminate by a gravure coating method. Obtained a roofing material by the same method as in Example 1. Friction resistance, shear adhesion (to ground plate), shear adhesion (shear adhesion to the walking surface), waterproofness (water resistance), moisture permeability resistance, and nail hole water resistance were measured, and the results are shown in Table 1. Shown in Similarly, the workability (walking stability) and needle leakage prevention properties of the obtained roofing material were measured, and the results are shown in Table 2.

(Comparative Example 1)
A non-woven fabric “Luxer (registered trademark) H4080ZZ (weight per unit: 105 g / m ² , thickness: 0.31 mm) commercially available from Asahi DuPont Flashspan Products Co., Ltd. is used as the base material for the underlaying material. A plurality of independent convex portions of a pattern to be described later by a gravure roll using the hot melt resin shown below, and linearly connected linear convex portions having a width of 3 mm and a height of 1 mm were provided in parallel from the end portion. Further, as an anti-slip process on the back surface, silica powder having an average particle diameter of 100 μm and a binder emulsion acrylic-styrene resin were mixed, and the mixture was sprayed almost uniformly by a spray method to obtain 30 g / m ² (silica: About 20 g / m ² , binder: about 10 g / m ² ) was adhered and dried to obtain a lower sowing material.
<Pattern> Circular shape with a diameter of 13 mm, pitch of 14 mm, height of 1.1 mm 25% area ratio occupied by the convex part, adhesion amount of about 60 g / m (only the pattern part)
<Hot melt agent> Fine tack E-3C (manufactured by Yamabun Yuka)
Main component: acrylic copolymer / hydrogenated petroleum resin / wax softening point: about 120 ° C.

(Comparative Example 2)
JIS A6013 defined modified asphalt roofing (commercially available) was used as the underlay material.

(Comparative Example 3)
As a commercially available asphalt roofing material with an adhesive layer, use Morasan No. 2 tack (manufactured by Nanao Industry Co., Ltd.), wind up while peeling off the release paper that was used, and use a roll shape as the underlaying material did.

  For the roof underglazing materials of Comparative Examples 1 to 3, the physical properties of the underglazing material and the evaluation results were measured in the same manner as in Example 1, and the results are shown in Tables 1 and 2.

(Evaluation results)
As can be seen from Table 1, the roofing materials of Example 1 and Example 2 do not cause a significant increase in moisture permeability resistance compared to the conventional moisture permeable type (Comparative Example 1), and are slip resistant and waterproof. It turns out that the nature is not inferior.

  Moreover, as can be seen from Table 2, in terms of practicality, the slope becomes large, and the conventional underlaying materials (Comparative Examples 1 and 2) have insufficient adhesion, wrinkles occur, It turns out that it loses to the tension of the foot, and it moves and the gait is lowered. In addition, in terms of prevention of nail leakage, in Example 1, water did not enter between the underlaying material and the field, and a good result was obtained. It was found that the conventional adhesive product (Comparative Example 3) does not have moisture permeability, and when the release paper is removed, it does not peel off and cannot be attached to the plywood.

The present invention relates to a roofing material that enhances the waterproof property of a roof structure of a building as a building material, and has a hole through which air passes on the back surface of the roofing material that has a dew condensation prevention and moisture release function. Providing a layer eliminates pinning of the needle and further suppresses the ingress of water from the nail fixing part, and improves handling at the construction site, and waterproofs the roof structure of the building It can be used as a roofing material that enhances performance.

Claims (6)

A roofing material comprising a laminate having a slip-proof layer, a moisture-permeable waterproof layer, and an adhesive layer, wherein the adhesive layer is provided on the opposite side of the moisture-proof waterproof layer with the moisture-permeable waterproof layer interposed therebetween, The adhesive strength of the adhesive layer to the plywood for the base plate is 10 N / 12.5 cm ² or more, the shear adhesive strength of the adhesive layer surface to the anti-slip layer surface is 50 N / 12.5 cm ² or less, and the laminate The roof perforation material is characterized by having a moisture permeability resistance of 1.0 m ² · s · Pa / μg or less.   The roofing material according to claim 1, wherein the anti-slip layer is an anti-slip nonwoven fabric, and the moisture-permeable waterproof layer is a spunbond nonwoven fabric or a porous film.   The roofing material according to claim 1, wherein the moisture-permeable waterproof layer is a laminate in which a fabric is impregnated or coated with polyurethane resin.   4. The adhesive layer according to claim 1, wherein the adhesive layer has holes through which air passes, and the holes through which the air passes independently exist in a size corresponding to a diameter of 1 cm or less. The roofing material according to claim 1. 5. The roofing material according to claim 1, wherein a shear adhesive force of the surface of the adhesive layer to the plywood for field plate is 15 N / 12.5 cm ² or more. 6. The roofing material according to claim 1, wherein a shear adhesive force of the surface of the adhesive layer to the surface of the anti-slip layer is 20 N / 12.5 cm ² or less.