JPH10166509A - Moistureproof sheet and moistureproof structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a moistureproof sheet having excellent operating environment, safety and handleability by executing without necessity of high temperature heat treatment and excellent executing efficiency by efficiently laying in a high place or narrow space without generating waste such as separator at the time of executing, and a moistureproof structure having excellent operating efficiency and reliability of moistureproofing treatment. SOLUTION: The moistureproof sheet 3 comprises a laminated fixed material of a flexible moistureproof layer 1 for shielding flow of moisture and 2 a rubber layer 2 having small deforming stress to prevent occurrence of crack in the moitureproof layer. The sheet of the buffer layer side is fixed to a moistureproofing surface via an adhesive layer made of water dispersion adhesive. Thus, release of a separator is not necessary, and the sheet can be adhered in the state that the adhesive is undried.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moisture-proof sheet which is suitable for waterproofing a building and has excellent workability, work environment, safety and handling, and a moisture-proof structure using the same.

[0002]

2. Description of the Related Art Conventionally, as a moisture-proof structure of a building or the like, there has been known a hot asphalt layer formed by heating and melting asphalt and applying the asphalt to a moisture-proof treated surface. However, there was a problem in that a bad odor was generated when asphalt was heated and melted, resulting in inferior working environment, and because the melting temperature was high, workers were easily burned, safety was poor, and handling was poor. .

[0003] On the other hand, in view of the above, there is also known a moisture-proof structure of a pressure-sensitive adhesive sheet laying type which does not require a heat treatment at a construction site. In this method, a pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer provided on a rubber sheet or asphalt sheet is bonded and laid on the moisture-proof treated surface via the pressure-sensitive adhesive layer, and the pressure-sensitive adhesive sheet can be handled as a roll or the like. Therefore, a separator is temporarily attached to the adhesive layer. Therefore, at the time of construction, the separator is peeled off to expose the adhesive layer, and is adhered to the moisture-proof surface through the adhesive layer.

[0004] However, in such an adhesive sheet, a separator for temporarily protecting the adhesive layer becomes a waste at the time of construction and causes a disposal problem, and a small space such as under a floor or the like,
There is a problem that the laying work while stripping the separators at high places such as the side walls and the ceiling requires much time and labor and the construction efficiency is poor.

[0005]

The present invention can be carried out without the need for high-temperature heat treatment, and is excellent in work environment, safety and handling properties. In addition, it does not generate waste such as separators at the time of construction. Another object of the present invention is to develop a moisture-proof sheet that can be efficiently laid and has excellent construction efficiency, and a moisture-proof structure that has excellent work efficiency and reliability of moisture-proof treatment.

[0006]

The present invention is characterized in that it comprises a laminated fixed body of a flexible moisture-proof layer for shielding the inflow of moisture and a buffer layer having a small deformation stress for preventing cracks from being generated in the moisture-proof layer. A moisture-proof sheet, and a moisture-proof structure, wherein the buffer layer side of the moisture-proof sheet is fixed to the moisture-proof treated surface via an adhesive layer made of a water-dispersed adhesive. .

[0007]

According to the moisture-proof sheet of the present invention, it can be constructed without generating waste such as separators and without the need for high-temperature heat treatment, and can be laid efficiently even in high places or in small spaces. Moisture-proof treatment of structures and the like can be easily and efficiently achieved, and the work environment, safety and handling during construction are excellent.

Further, according to the moisture-proof structure of the present invention using the above-mentioned moisture-proof sheet, the separator does not need to be peeled off. It has excellent work efficiency because it can be bonded, and also has excellent reliability in its moisture-proof treatment.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The moisture-proof sheet of the present invention comprises a laminated fixed body of a flexible moisture-proof layer for shielding the inflow of moisture and a buffer layer having a small deformation stress for preventing the moisture-proof layer from cracking. . Examples thereof are shown in FIGS. 3 is a moisture-proof sheet, 1 is its moisture-proof layer, and 2 is its buffer layer.

[0010] The moisture-proof layer is intended to shield moisture inflow.
Therefore, for the formation thereof, a suitable water-resistant base material that does not transmit moisture, has flexibility, and is easy to apply can be used. In general, an aluminum foil alone, or an aluminum foil, a plastic film, a rubber sheet, or the like to which a reinforcing material such as a warif, a mesh, or a plastic film is bonded is used. The thickness of the moisture-proof layer can be appropriately determined according to the strength and the like, and is usually 1 mm or less, especially 10 to 500 µm, particularly 30 to 300 µm.

The plastics and rubbers forming the above-mentioned films and sheets are also exemplified by polyolefins such as polyethylene and polypropylene, ethylene-propylene copolymer rubber, ethylene-propylene-diene copolymer rubber, butyl rubber and neoprene rubber. An appropriate water-resistant material can be used, and there is no particular limitation.

The purpose of the buffer layer is to prevent cracks from being generated in the moisture-proof layer based on stress caused by a dimensional change caused by a temperature change between the moisture-proof layer and the moisture-proof treated surface. Therefore, for its formation, an appropriate material which is easily deformable, such as non-woven fabric, woven fabric, felt, paper or foam, is less likely to generate stress due to the deformation, and can reduce the acting force transmitted to the moisture-proof layer. Can be used.

Above all, a buffer layer which is hygroscopic and adheres well to the water-dispersed adhesive from the viewpoint of improving the working efficiency by bonding in a wet state without the drying time of the water-dispersed adhesive. Is preferred. The formation of the hygroscopic buffer layer can be performed, for example, by using a hygroscopic material or a substrate having voids such as a nonwoven fabric.

An adhesive layer may be used for forming the buffer layer. In this case, as shown in FIG. 2A, the outer surface of the adhesive layer 21 is made non-adhesive as in the buffer layer forming material exemplified above,
The structure is covered with a hygroscopic substrate 22. This makes it unnecessary to use a separator for the adhesive layer, thereby avoiding the problem of waste and the difficulty in laying work in high places and small spaces. In the case where the buffer layer shows tackiness, such as when the buffer layer is made of an unvulcanized rubber sheet, a coating treatment according to the above-mentioned pressure-sensitive adhesive layer can be applied as necessary.

As shown in FIG. 2B, it is permissible to temporarily attach the separator 4 to the exposed portion of the adhesive layer while leaving the exposed portion of the adhesive layer about the overlap width, since this does not complicate the work of laying. In this case, from the viewpoint of the adhesion processing efficiency of the overlap portion, and
It is also preferable to compare the amount of waste (separator) generated and the like.

The lamination and fixation of the moisture-proof layer and the buffer layer may be performed by any suitable method such as a method using an adhesive or a pressure-sensitive adhesive, a heat-sealing method, a pressure bonding method or a heat-pressure bonding method, and is not particularly limited. The thickness of the moisture-proof sheet can be appropriately determined according to the moisture-proof treated surface, etc., but in general, the thickness is 5 mm or less from the viewpoint of handleability based on weight and flexibility at the time of construction or winding property. It is 0.3 to 3 mm, especially 0.4 to 2 mm.

The moisture-proof sheet of the present invention can be used to prevent water or water vapor from being applied to an appropriate place such as an outer wall or a ceiling of a house or the like, a kitchen, a dirt floor or the like for the purpose of preventing the inflow of moisture. It can be used for any appropriate application that is required to block transmission. When used as a wall sheet or the like, necessary layers such as a moisture-proof layer and a buffer layer can be treated with an appropriate agent such as a fungicide, an antibacterial agent, a deodorant, an insect repellent, and a quencher.

In the above description, a preferred method of applying the moisture-proof sheet is as shown in FIG.
In this method, the buffer layer 2 side of the moisture-proof sheet 3 is fixed via an adhesive layer 5 made of an aqueous dispersion adhesive. According to this method, since the adhesive layer is made of the water-dispersed adhesive, after applying the adhesive to the moisture-proof treated surface or the like, even if the adhesive is in a wet state, even if the moisture-proof sheet is adhered, the reliability is improved. It is possible to form an excellent moisture-proof structure, shorten the drying time of the adhesive, and improve the construction efficiency.

As the above-mentioned water-dispersed adhesive, a suitable adhesive such as rubber or synthetic resin based on latex or emulsion can be used, and the water-dispersed adhesive is not particularly limited. .

[0020]

【Example】

Example 1 Thickness 0.1 mm made of aluminum foil reinforced with warif
And a 0.5 mm-thick butyl rubber-based unvulcanized rubber sheet were pressure-bonded via the warif side, and a rayon cloth was pressure-bonded to the exposed surface of the unvulcanized rubber sheet to obtain a moisture-proof sheet.

Next, an acrylic adhesive made of an emulsion is applied to the wooden outer wall material. While the adhesive is in a wet state, the moisture-proof sheet obtained above is subjected to an adhesive treatment via the rayon cloth side. Thus, a moisture-proof structure was formed.

In the above, the separator was not required to be peeled off, no waste such as a separator was generated, and the moisture-proof sheet could be laid efficiently with no need for high-temperature heat treatment. Further, the obtained moisture-proof structure was left in a natural environment for 3 days to try to peel the moisture-proof sheet, but could not be peeled with bare hands.

[Brief description of the drawings]

FIG. 1 is a cross-sectional side view of an example of a moisture-proof sheet.

FIG. 2A is a side sectional view of another example of the moisture-proof sheet. FIG. 2B is a front sectional view of the example of the moisture-proof sheet.

FIG. 3 is an explanatory sectional view of a moisture-proof structure.

[Explanation of symbols]

 3: Moisture-proof sheet 1: Moisture-proof layer 2: Buffer layer 21: Adhesive layer 22: Hygroscopic substrate 5: Water-dispersed adhesive layer 6: Moisture-proof treated surface

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tsukasa Ochikai 18-Hirayama, Nakahara-cho, Toyohashi-shi, Aichi Nitto U-Tech Co., Ltd.

Claims (3)

[Claims] 1. A flexible moisture barrier that blocks the inflow of moisture;
A moisture-proof sheet comprising a laminated fixed body with a buffer layer having a small deformation stress for preventing cracks from occurring in the moisture-proof layer. 2. The method according to claim 1, wherein the moisture-proof layer is an aluminum foil, an aluminum foil bonded to a reinforcing material, a plastic film, or a rubber sheet, and the buffer layer is a nonwoven fabric, a woven fabric,
A moisture-proof sheet having a thickness of 0.3 to 3 mm, which is a paper, a foam, or an adhesive layer whose outer surface is coated with a non-adhesive and hygroscopic substrate. 3. A moisture-proof structure, wherein the buffer layer side of the moisture-proof sheet according to claim 1 is fixed to the moisture-proof treated surface via an adhesive layer made of a water-dispersed adhesive.