JP2000006309A - Waterproof sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid the necessity of re-adhesion treatment in a next process caused by separation even in the case of a large uneven bonding surface by well keeping an adhesion state even in bending adhesion due to a protrusion of about 10 mm. SOLUTION: A waterproof sheet is constituted by arranging a metal foil 12 between a polymer sheet 11 and a self-adhesive layer 13 to closely bond the same to both of them. By this constitution, bending treatment becomes easy in the intermediate adhesion arrangement of the metal foil and execution efficiency is drastically enhanced and the deformation follow-up properties to the outer wall surface at a bending corner part is also enhanced to make it possible to suppress the generation of levitation (gap) and the adhesion area with the outer wall surface is enhanced to achieve perfect waterproof treatment to efficiently perform waterproof treatment with good execution properties.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof sheet which is excellent in maintaining adhesiveness of a folded portion and is suitable for waterproofing an outer wall.

[0002]

2. Description of the Related Art Conventionally, a waterproof sheet in which an adhesive layer is provided on one side of a rubber sheet has been known. Such a waterproof sheet,
As shown in FIG. 2, the adhesive is applied via an adhesive layer to the upper portion 21 of the outer wall 2 attached via the outer wall base material 3 of the unit house through the adhesive layer. In general, a method is employed in which the end portion 14 of the waterproof sheet 1 is protruded by about 10 mm from the outer wall 2 and bent to cover the upper portion of the outer wall.

[0003] However, the rebound force is strong due to the short fold length due to the protrusion, and the problem of peeling frequently occurs after bonding once, and it is necessary to bend and bond again in the next step, resulting in poor construction efficiency. There was a point. Such peeling problem occurs particularly when the unevenness of the bonding surface is large. Increasing the fold length can alleviate the problem, but in addition to the increase in the required amount of waterproof sheet, folds that are too long hinder the next process.

[0004]

In view of the above, the present invention has been made in consideration of the above, even in the case of bending and bonding by sticking out about 10 mm, the bonding state is maintained well, and even in the case where the unevenness of the bonding surface is large, peeling in the next step is performed. An object of the present invention is to develop a waterproof sheet capable of avoiding the need for re-adhesion treatment.

[0005]

The present invention provides a waterproof sheet characterized in that a metal foil is disposed between a polymer sheet and an adhesive layer.

[0006]

According to the waterproof sheet of the present invention, even in the case of bending and bonding by protruding about 10 mm, the bonding state can be maintained well, and peeling can be prevented for a long time even if the unevenness of the bonding surface is large. The re-adhesion treatment in the process can be made unnecessary, and the waterproof treatment can be efficiently performed with good workability. The above-mentioned peeling problem can be overcome by a simple process of placing a metal foil in close contact with the middle, and the bending process is facilitated, dramatically improving the construction efficiency and following the deformation of the outer wall surface at the corner of the bending. Thus, the occurrence of floating (gap) can be suppressed, and the area of adhesion to the outer wall surface can be improved, and the waterproofing can be more complete.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION A waterproof sheet according to the present invention comprises a metal sheet closely disposed between a polymer sheet and an adhesive layer. An example is shown in FIG. 11 is a polymer sheet,
12 is a metal foil and 13 is an adhesive layer.

[0008] The polymer sheet may be any water-resistant one that can block moisture. Accordingly, any conventional sheet made of a suitable polymer can be used for the sheet. By the way, as an example, ethylene propylene
Diene rubber (EPDM), ethylene / propylene rubber,
Ethylene-propylene terpolymer, silicone rubber, fluorine rubber, acrylic rubber, polyurethane rubber, polyamide rubber, natural rubber, polyisobutylene,
Polyisoprene, chloroprene rubber, butyl rubber, nitrile butyl rubber, acrylonitrile / butadiene rubber, chlorosulfonated polyethylene, styrene / butadiene rubber, styrene / butadiene / styrene rubber, styrene / isoprene / styrene rubber, styrene / ethylene / butadiene rubber, styrene / ethylene Vulcanized or non-vulcanized sheets made of rubber-based polymers such as butylene-styrene rubber and styrene-isoprene-propylene-styrene rubber.

Further, for example, polyvinyl chloride, polyether, acrylic polymer and silicone polymer, polyester and polyurethane, polyether sulfone and polycarbonate, polyamide and polyimide, polyolefin such as polyethylene and polypropylene, ethylene-vinyl acetate copolymer, A crosslinked or non-crosslinked sheet made of a plastic such as polystyrene, vinyl acetate polymer or polysulfone may also be used.

[0010] The polymer forming the sheet may comprise a mixture of two or more rubber-based polymers or plastics. The polymer sheet may be composed of a superimposed body of different kinds of polymer layers, or may be a sheet reinforced with fibers or a knitted structure thereof. A preferred polymer sheet is made of a rubber-based polymer such as EPDM, and is excellent in flexibility, workability, water resistance, durability and the like.

[0011] The thickness of the polymer sheet may be appropriately determined according to the strength and the like. Generally, from the viewpoint of workability due to flexibility and weight, etc., 10 μm to 3 mm, especially 50 μm to
It is 1.5 mm, especially 100-800 μm.

The metal foil to be adhered to the polymer sheet is
The purpose is to alleviate the repulsion caused by the bending stress of the polymer sheet. As the metal foil, an appropriate one can be used,
Aluminum foil can be preferably used in terms of water resistance and light weight. The thickness of the metal foil can be appropriately determined according to the bending repulsive force of the polymer sheet and the like, but is generally 500 μm or less, particularly 5 to 300
μm, especially 10 to 150 μm.

The adhesion treatment between the polymer sheet and the metal foil may be performed in such a state that the polymer sheet and the metal foil behave integrally and the bending stress of the polymer sheet is transmitted to the metal foil. Therefore, the contact treatment can be performed by an appropriate method. Incidentally, examples thereof include a bonding method using an adhesive containing a pressure-sensitive adhesive, a heat fusion method, a pressure bonding method, and a heat pressure bonding method. In the heat-compression bonding, a metal foil can be used as a wari or the like which is previously laminated with a heat-sensitive adhesive layer.

The adhesive layer is provided on the side of the metal foil 12 which is in close contact with the polymer sheet 11 as shown in FIG. The adhesive layer can be provided by an appropriate method such as a method of applying an adhesive on a metal foil or a method of transferring an adhesive layer provided on a separator onto a metal foil.

For forming the pressure-sensitive adhesive layer, an appropriate water-resistant pressure-sensitive adhesive such as a rubber-based pressure-sensitive adhesive using butyl rubber or the like, an acrylic-based pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, a urethane-based pressure-sensitive adhesive, or an amide-based pressure-sensitive adhesive is used. And there is no particular limitation. The thickness of the pressure-sensitive adhesive layer can be appropriately determined according to the adhesive force or the like, but is generally 3 mm or less, preferably 0.1 to 2 mm, particularly 0.3 to 1 mm.
It is said.

The overall thickness of the waterproof sheet according to the present invention can be appropriately determined according to the application location and the like. Generally, the handleability based on the weight and flexibility at the time of construction, the winding property, etc. From the point of 5 mm or less, especially 0.3 to 3 mm, particularly 0.4 to 2 mm. Note that the waterproof sheet should be placed in the distribution process in an appropriate form according to the related art, such as a sheet in which the adhesive layer is covered with a separator, or the back of the polymer sheet is treated with a release agent or the like to form a roll. Can be.

[0017] The waterproof sheet of the present invention is required to block the permeation of water and the like, such as a sheet applied for the purpose of preventing intrusion of moisture into the outer wall and ceiling of a building such as a house, a kitchen, a soil, or the like. It can be used for any appropriate application.
The waterproof sheet may be treated with an appropriate agent such as a fungicide, an antibacterial agent, a deodorant, an insect repellent, or a quencher.

[0018]

EXAMPLES Example 1 A 70 μm thick EPDM rubber sheet having a thickness of 0.31 mm
After a polyethylene wrap with a total thickness of 140 μm laminated with an aluminum foil having a thickness of 140 μm was heated and pressed through the polyethylene surface, a butyl rubber-based adhesive layer having a thickness of 0.5 mm was provided on the aluminum foil surface to obtain a waterproof sheet.

Comparative Example A waterproof sheet was obtained by providing a butyl rubber-based adhesive layer having a thickness of 0.5 mm on one side of an EPDM rubber sheet having a thickness of 0.45 mm.

Evaluation Test As shown in FIG. 2, the waterproof sheet 1 having a width of 40 mm obtained in Example 1 and Comparative Example was folded on the upper end 21 of an outer wall material 2 (surface: acrylic resin coating; stucco pattern) having a thickness of 30 mm. The length of 14 was 10 mm, and it was folded back and adhered manually at 0 ° C. or 23 ° C., subjected to a desired waterproofing treatment, and observed for peeling at the folded-back bonded portion for 7 days.

The results are shown in the following table.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment.

FIG. 2 is an explanatory cross-sectional view of a waterproof sheet application example.

[Description of Signs] 1: Waterproof sheet 11: Polymer sheet 12: Metal foil 13: Adhesive layer

Continued on front page F-term (reference) 2E110 AA14 AA27 AA42 AA65 AB03 AB04 AB22 AB43 BA03 BC01 DA06 DC21 GA15W GA15X GA23W GA29X GA32W GA32X GA32Z GA42W GA50W GB06Z GB43W GB44W GB45W GB46W GB47W GB47X GB48WGB52W GB52W GB52W GB52B GB44W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52W GB52X AK09 AK09J AK28 AK28J AK75 AL01 AN00A AN02 AR00C BA03 BA07 BA10A BA10C EC03 GB07 GB90 JD05 JK06 JL13C

Claims (2)

[Claims] 1. A waterproof sheet wherein a metal foil is disposed in close contact between a polymer sheet and an adhesive layer. 2. The waterproof sheet according to claim 1, wherein the polymer sheet is made of a rubber-based polymer and the metal foil is made of an aluminum foil.