JP2001279880A - Structural body for roof substrate material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roof substrate material having a slip preventive property, water repellency, moisture permeable waterproof, and watertightness and allowing safe work even at a high lift place. SOLUTION: A non slip layer 2 having air permeability, no adhesiveness, a slip factor of 0.1 or more, and water repellency of 60 points or more is arranged on a surface, a moisture permeable waterproof film 4 having vapor permeability of 2,000 to 20,000 g/m2/24 hr is arranged in a second layer, and a protection layer 1 is provided in a third layer to constitute a structural body for roof substrate material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet material comprising a water-repellent non-slip layer, a moisture-permeable and waterproof layer, and a protective layer and having excellent workability, and is suitable as a roof base material. .

[0002]

2. Description of the Related Art In recent years, a highly airtight construction method has been implemented in which a sheet having moisture permeability and waterproofness is pasted to prevent the invasion of wind and rain into a room, and to escape water vapor in a room to prevent dew condensation in a wall structure. Have been. However, only the roof surface has no moisture permeability, for example, asphalt felt is provided to prevent rainwater from entering.

Japanese Unexamined Patent Publication (Kokai) No. 2-269277 discloses a roofing and roofing material excellent in waterproofness, in which a stretchable and sticky resin is applied to the surface of a cloth, and a resin having low adhesiveness is further applied thereon. However, since this roof underlaying material is formed from a plurality of resin layers, it lacks moisture permeability and leaves room for improvement in watertightness when nailed.

[0004] As an improvement of the above-mentioned base material having poor watertightness, Japanese Patent Application Laid-Open No. Hei 4-309649 discloses a method in which a stretchable and adhesive resin is applied to the surface of a nonwoven fabric or a microporous film, and the watertightness is improved. It discloses an excellent architectural base material, but if it is covered with such a base material, it will be damaged by the condition of the base plate, or if the base material is wet such as when working in rainy weather, it will slip It has been pointed out as a problem. Further, such a cloth has adhesiveness, and thus has a drawback that workability is poor, such as taking time to release the roll-shaped cloth.

Further, Japanese Patent Application Laid-Open No. 9-291657 discloses that a water-impermeable chlorine-containing polymer film having ventilation holes is provided on both sides of a water-repellent and moisture-permeable film, and a ventilation film is provided on the other surface. It discloses a composite waterproofing sheet for construction and civil engineering that has properties and cushioning properties, but when used as a base material, it will not be damaged due to the condition of the surface such as the covered base plate, but when working in rainy weather etc. The base material lacks anti-slip properties when wet.

[0006]

In the base material represented by asphalt felt, there is no moisture permeability.
Moisture builds up in the back of the roof, especially in winter, when water droplets form on the back of the roof slab, causing the water content of the baseboard to exceed 80%. The moisture content of the roof base material (wood or plywood) becomes 20% or more, resulting in an environment that is easily rotten. In addition to the above-described roof base material, even if the roof base material has moisture permeability, the conventional roof base material lacks safety in work at high places, especially in rainy weather.

[0007] Therefore, there is a requirement for the roof base material to be moisture permeable and waterproof. Water tightness is maintained even when nails are driven. It has good handleability and good workability as a roof base material. No damage to the sheet during construction. It is a roof base material that can be safely operated in rainy weather as well as in fine weather.
Good productivity of sheet material as base material. The lowering of the production cost is expected as a base material.

[0008]

Means for Solving the Problems The present invention has been made as a result of intensive studies to solve the above-mentioned problems, and has reached the present invention. The structure thereof is as follows.

That is, according to the present invention, there is provided (1) a structure comprising three layers of a non-slip layer, a moisture-permeable waterproof and water-tight layer, and a protective layer. sex there and water repellency is not less than 60 points no, and a moisture permeability of 1,000~20,000g ^/ m 2 ^/ 24hr as a structure, waterproof measured according to JIS L1092 is 500~10,000mm A structure for a roof base material characterized by the following.

(2) The anti-slip layer is formed of at least one synthetic resin selected from polyamide, polyacryl, and polyurethane, and at least one water-repellent resin selected from fluorine, silicon, and wax. At least the one blowing agent selected from the sex and inorganic compounds, basis weight 10 to 100 g / m ² of natural or synthetic fibers of the nonwoven fabric, the roof of the above (1), characterized in that it is composed of woven or knitted fabric In the structure for the base material.

(3) The moisture-permeable, water-tight layer is a synthetic resin film of at least one thermoplastic elastomer selected from the group consisting of microporous polyethylene, polypropylene, polyvinyl alcohol, and polyurethane.
The structure for a roof base material according to the above (1), wherein the structure has a thickness of 0 to 300 μm and a Young's modulus of 1 to 30 kg / mm ² .

(4) The structure according to the above (1), wherein the non-slip layer is provided on the entire outermost surface on one side of the three-layer structure without impairing moisture permeability. Exist.

(5) The non-slip layer is unevenly distributed on one outermost side of the structure.
In the structure for roof base materials.

(6) The structure for a roof base material according to the above (1), wherein the moisture-permeable, waterproof and water-tight layer is located in a central layer.

(7) The protective layer is on the opposite side of the non-slip layer with the moisture-permeable, water-tight layer interposed therebetween, and has a basis weight of 10 to 10
The structure for a roof base material according to the above (1), comprising a nonwoven fabric, a woven fabric or a knitted fabric of 0 g / m ² of natural and / or synthetic fibers.

As described above, in the three-layer structure of the present invention in which the moisture-permeable waterproof and water-tight layer is protected by the non-slip layer and the protective layer, the three-layer structure has moisture-permeable waterproof property, water-tight property and water repellency. When used as a roof base material, the workability is good, and in the subsequent construction, even in rainy weather, work can be performed safely even at high places without impairing the slip resistance.

[0017]

Next, the main structure of the structure will be described. First, the non-slip layer will be described. The base material of the anti-slip layer has air permeability and a basis weight of 10 to 100.
If it is g / m ² , it may be a nonwoven fabric made of spunbond or needle punch, or a woven or knitted fabric. The material may be natural fiber or synthetic fiber, and there is no limitation.

The anti-slip agent has anti-slip properties,
Those having no tackiness are preferred, and examples thereof include rubbery materials and resins. Specifically, polyamide-based, polyester-based,
Examples include polyolefins, synthetic rubbers, acrylics, urethanes, epoxies, and asphalts. Organic and inorganic blowing agents are added to further increase the anti-slip effect. The use of this foaming agent is one of the points of the present invention, and the moisture permeability can be maintained even by coating the entire surface.

Examples of the method for applying the anti-slip agent include a coating method, a gravure roll method, a relief printing method, and a screen printing method. The application area of the anti-slip agent may be the entire surface as long as the air permeability is not impaired, or may be the minimum area where the anti-slip effect is exhibited.

The water repellent applied to the surface of the anti-slip layer may be any one which can exhibit a water repellency of 60 points or more, and includes fluorine, silicon and wax. As a method of applying, a padding method, a gravure roll method,
Spray method and the like can be mentioned.

Next, the moisture-permeable waterproof watertight layer will be described. The purpose of the moisture-permeable waterproof watertight layer is to prevent rainwater from entering from outside and adjust the humidity inside and outside the house when used as an inner wall material or a roof base material.

The film as a basic material of the moisture-permeable waterproof watertight layer is polyethylene, polypropylene, polyurethane,
Synthetic polymers such as polyvinyl alcohol and urethane-based thermoplastic elastomers can be mentioned, and microporous polyethylene having good processability and high moisture permeability is preferably used. 2,000 g / m ² as moisture permeability
/ 24 hr or more, preferably 6,000g ^/ m ^2/24
hr or more. Regarding the waterproofness of the film, no matter how much the film is exposed to the wind and rain, there is no problem if the water pressure is 500 mm or more. By incorporating the film into the three-layer structure, the water resistance is further improved. Also, from the point of water tightness,
Those having a size of 50 μm or more are required, and those having a size of 50 to 300 μm are used. Preferably 80-150 μm is used. Further, the Young's modulus is preferably 1 to 30 kg / mm ² from the viewpoint of water tightness and handleability.
３０30 kg / mm ² is used.

As a method of laminating the three layers of the anti-slip layer, the moisture-permeable waterproof water-tight layer, and the protective layer, that is, the lamination method includes dry lamination, wet lamination, heat lamination and the like. The adhesive may be a solvent type, an emulsion type or any other resin, but has an adhesive strength of 0.5 kg / inch.
It is necessary to choose so that it becomes above.

The moisture permeability of the entire structure, which is a laminate of three layers, is 1,000 g / m 2/24 hr or more, preferably ² g / m ² , in order to prevent water drops on the roof base plate and improve the environment during the rainy season. requires 000g ^/ m 2 ^/ 24hr or more. In addition, the thickness of the laminated product is 0.5 to
1.5 mm is appropriate.

[0025]

Next, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not necessarily limited to the following Examples.

The method for measuring various characteristics described in the present invention is as follows.

[Adhesive strength waterproofing property] JIS L 1089
5.10.2 (peel strength). Unit K
g.

[Young's modulus] According to JIS L 1096
It was determined according to 6.12 (tensile strength and elongation).

[Waterproof] JIS L 1092-5.
1.1 Determined by the B method (test method for waterproofness of textile products). Unit: mm.

[Moisture permeability] 4.1 of JIS L 1099
It was determined by Method A (test method for moisture permeability of textiles). Unit g ^/ m 2 ^/ 24hr.

[Slip resistance] JIS A 1454 6.1
2 (slipperiness test). In addition, the sliding piece is a polyester spunbond nonwoven fabric made by Unitika (20557F
LV) A basis weight of 55 g / m ² was used.

[Water repellency] JIS L 1092 5.2
(Water repellency test).

[Watertightness] An iron round nail N38 was driven into a 9 mm board (plywood) through various structures.
In 5430 5.6 (permeability test), the nail column waterproofness was evaluated based on the change in height after leaving the water column at an initial height of 250 mm for 24 hours.

[0034]

Example 1 The first layer which is a non-slip layer has a basis weight of 25 g.
/ M ² of polyester nonwoven fabric (Unitika), a polyurethane resin (Hodogaya Co., Ltd.) Iizelux S-1085 as a lubricant was applied at a solid content of 15 g / m ² by a full-surface coating method, and after drying, fluorine A 5% aqueous solution of Asahigard AG-710 (Asahi Glass Co., Ltd.), which is a system water repellent, was applied at 10 g / m ² using a gravure roll to prepare a non-slip layer surface. The second layer, which is moisture-permeable and water-tight, is made of Tokuyama's 50μ polyethylene film (trade name: PH50, moisture-permeable)
7,000g ^/ m 2 ^/ 24hr) was used. For the third layer as the protective layer, a polyester nonwoven fabric (Unitika) having a basis weight of 25 g / m ² was used. The lamination from the first layer to the third layer was performed by a so-called dry lamination method using a phthalic acid-based polyester resin, and the non-adhered portion was adjusted to 60%. The coating amount of the phthalic acid-based polyester resin at this time was 3 g / m ² in solid content. FIG. 1 shows a cross-sectional view of the three-layer structure obtained by the above configuration. As shown in Table 2, the structure obtained by the present invention was evaluated as a roof base material, and good results were obtained.

[0035]

Example 2 The first layer was a polyester nonwoven fabric (Unitika) having a basis weight of 25 g / m ^{2 and} a polyurethane resin (Hodogaya Co., Ltd.) Iizelux S-1085 as an anti-slip agent.
Was applied at a solid content of 8 g / m ² by a roller printing method capable of giving a dot shape. Also,
Thereafter, a water repellent was applied in the same manner as in Example 1. The second layer and the third layer were formed in the same manner as in Example 1. Also, the lamination of the first to third layers was performed by the dry lamination method in the same manner as in Example 1. FIG. 2 shows a cross-sectional view of the structure obtained by the above configuration. As shown in Table 2, good results were obtained as a roof base material.

[0036]

Comparative Example 1 The first and third layers had a basis weight of 25 g / m ^2.
Polyester nonwoven fabric (Unitika) only. The second layer is made of Tokuyama 5 which can provide a moisture permeable and waterproof function.
Only 0 μm polyethylene film was used. Lamination of the first and third layers was performed in the same manner as in Example 1. FIG. 3 shows a cross-sectional view of the structure obtained by the above configuration.

[0037]

Comparative Example 2 The first layer was formed with the same structure as in Example 2, and was used as a sheet alone. FIG. 4 shows a cross-sectional view of the above configuration.

The compositions of Examples 1 and 2 and Comparative Examples 1 and 2 are shown in Table 1, and their performance evaluation and overall evaluation as a roof base material are shown in Table 2.

[0039]

[Table 1]

[0040]

[Table 2]

[0041]

By using the structure according to the present invention as a base material for a roof, the water repellency and non-slip of the surface of the structure prevent the accumulation of rainwater not only on a sunny day but also on a rainy day. Construction can be done safely even on the roof. Even after a few years after construction, the structure's moisture permeability allows moisture inside the house to escape to prevent dew condensation, and its waterproofness and nail hole sealing prevent rainwater from entering from outside. It was able to prevent the corrosion of the roof base plate and the rafters, and also prevented the leakage of rainwater, and could be suitably used as a roof base material. Furthermore, among these effects,
The reason why the nail hole sealing property can be exhibited is that a gap generated between the nail and the structure is corrected by the elastic force of the synthetic resin sheet used for the moisture-permeable waterproof layer.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment in which an anti-slip agent is applied over the entire surface while maintaining air permeability.

FIG. 2 is a cross-sectional view showing an embodiment in which a lubricant is applied in a dot shape.

FIG. 3 is a cross-sectional view showing a form of a three-layer product without a non-slip layer.

FIG. 4 is a cross-sectional view showing a form in which only a non-slip agent is applied in a dot shape to a nonwoven fabric.

[Explanation of symbols]

 1. 1. polyester nonwoven fabric Anti-slip agent 3. Hot melt adhesive 4. Breathable waterproof film

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C08L 33/04 C08L 33/04 75/00 75/00 77/00 77/00 E04D 5/10 E04D 5 / 10 DF term (reference) 4F071 AA15 AA20 AA29 AA53 AH03 BC01 4F074 AA48 AA71 AA78 BA31 DA54 DA59 4J002 BG031 CK021 CL001 FD326 GL00

Claims (7)

[Claims] An anti-slip layer, a moisture-permeable and water-tight layer, and a protective layer.
In the structure composed of layers, one surface of the structure has a slip resistance coefficient of 0.1 or more, has no tackiness, and has a water repellency of 60.
Points and the structure has a moisture permeability of 1,000 to 1
And a ^{5,000g / m 2 / 24hr, JIS} L10
The waterproofness measured based on 92 is 500 to 10,000
mm, a structure for a roof base material. 2. A non-slip layer comprising at least one synthetic resin selected from non-adhesive polyamides, polyacryls and polyurethanes and at least one water-repellent resin selected from fluorines, silicones and waxes. At least the one blowing agent selected from organic and inorganic compounds, basis weight 10 to 100 g / m ² of natural or synthetic fibers of the nonwoven fabric, roof according to claim 1, characterized in that it is composed of woven or knitted fabric Structure for base material. 3. The moisture-permeable and water-tight layer is a synthetic resin film of at least one thermoplastic elastomer selected from the group consisting of microporous polyethylene, polypropylene, polyvinyl alcohol and polyurethane, and has a thickness of 50 to 300 μm.
Roof bed material for a structure according to claim 1, wherein the Young's modulus, comprising the 1 to 30 kg / mm ^2. 4. An anti-slip layer without impairing moisture permeability.
The three-layer structure for a roof base material according to claim 1, wherein the three-layer structure is located on the entire outermost surface on one side of the three-layer structure. 5. The structure according to claim 1, wherein the non-slip layer is unevenly distributed on the outermost layer on one side of the three-layer structure. 6. The structure according to claim 1, wherein the moisture-permeable, waterproof and water-tight layer is located in a central layer. 7. A protective layer is provided on the opposite side of the non-slip layer across the moisture-permeable and water-tight layer, and is composed of a nonwoven fabric, woven fabric or knitted fabric of a natural and / or synthetic fiber having a basis weight of 10 to 100 g / m ² . The structure for a roof base material according to claim 1, wherein: