JP2006057401A - Waterproof sheet and waterproof construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waterproof sheet for a pressure sensitive adhesive construction method and a waterproof construction method, for quickly and easily performing construction work without generating waste such as a film and releasing paper for covering and protecting a pressure sensitive adhesive layer in construction, in the pressure sensitive adhesive construction method of the waterproof sheet. <P>SOLUTION: This waterproof sheet has a body part, an insulating part and a joining part on its both surfaces or any one surface. This waterproof construction method is composed of the waterproof sheet for constituting the joining part of the pressure sensitive adhesive layer 3 and a soluble protective layer 6 for preventing pressure sensitive adhesion by covering a surface of this pressure sensitive adhesive layer, and the following processes. (α) the process of applying a primer to a backing surface, (β) the process of exposing the pressure sensitive adhesive layer 3 by dissolving the soluble protective layer 6 of the waterproof sheet having this joining part composed of the pressure sensitive adhesive layer 3 and the soluble protective layer 6 for coveting this layer by a liquid or pasty predetermined material, by having the insulating part and the joining part on a reverse surface of the body part, and (γ) the process of sticking the waterproof sheet of exposing the pressure sensitive adhesive layer to the reverse surface in the process (β) to the ground surface. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a waterproof sheet in which an adhesive material layer is coated with a soluble protective layer and a waterproof construction method using the waterproof sheet. Specifically, the soluble protective layer is dissolved in a predetermined liquid or paste to easily expose the adhesive material layer surface. The present invention relates to a waterproof sheet that can quickly adhere to various construction surfaces including an underlayer of an adhesive material layer and a waterproof construction method using the waterproof sheet.

As a waterproof layer used for waterproofing construction of buildings, a waterproof sheet such as a synthetic resin type, a rubber type, an asphalt type, or a urethane type waterproof coating material is used. In this waterproofing work, a solvent-based adhesive is used for bonding to a base such as concrete or mortar, and in the case of asphalt, an affixing operation is performed while applying asphalt melted at a high temperature.

Among these, the formation of the waterproof layer by sticking a waterproof sheet has seen many examples of construction from the viewpoint of the reliability of waterproof performance and good workability. The application of the waterproof sheet on the construction surface is roughly classified into a bonding method using an adhesive, a bonding method using an adhesive, and a bonding method using a mechanical fixing means. Among these, the bonding method using an adhesive and the bonding method using an adhesive are superior to the bonding method using a mechanical fixing means in terms of simplicity and speed in construction.
However, the bonding method using an adhesive takes time to develop adhesive force, and many use a large amount of solvent containing toluene, which may adversely affect the human body and the environment. It is considered that the bonding method using an adhesive becomes the mainstream.

FIG. 7 is a cross-sectional view showing a conventional waterproof sheet used in a bonding method using an adhesive.
In the figure, reference numeral 1 denotes an asphalt roofing material as a waterproof sheet. Mineral sand 2 is scattered on the surface, and adhesive layers 3 are alternately formed with insulating portions 4 on the back surface. Reference numeral 5 denotes a peelable protective film for the pressure-sensitive adhesive layer 3. At the time of construction, the asphalt roofing material 1 is attached by pressure-bonding the pressure-sensitive adhesive layer 3 to a construction surface, for example, a concrete base surface, which has been peeled off and smoothed by applying a primer. In this pasting, a gap is formed between the insulating portion 4 and the base surface, and a ventilation path is formed by the communication between the gaps, and water vapor generated from the base surface is discharged from the deaeration device or the like through the ventilation path. It is designed to prevent swelling of the waterproof layer.
Related art is disclosed in the following documents.
JP 2003-321905 A JP 2003-105936 A JP 2003-103704 A JP 2003-322769 A JP 2001-28897A

However, in the above-described conventional waterproof sheet and a waterproof method using the same, it is necessary to press the waterproof sheet to the base after exposing the adhesive layer by peeling off the protective film when the waterproof sheet is applied. . For this reason, there is an inconvenience that a large amount of film, release paper, and the like peeled off at the enforcement site are generated, and a large amount of work and cost are required for the processing.

The present invention provides a waterproof sheet, comprising a main body portion and a joint portion formed on both surfaces of the main body portion or one of the main body portions, and the joint portion covers the adhesive material layer and the surface of the adhesive material layer to prevent adhesion. It is intended to solve the above-mentioned conventional problems by comprising a soluble protective layer.

In the above waterproof sheet, an insulating portion for forming an air passage between the joint portion and the enforcement surface may be provided.

Furthermore, in any one of the above waterproof sheets, the soluble protective layer may be constituted by being dissolved by applying or spraying a predetermined liquid or paste-like material so that the adhesive layer can be easily exposed and activated.

Still further, in any of the above waterproof sheets, the soluble protective layer is made of any polymer such as polystyrene, styrene butadiene rubber, polyvinyl alcohol, polyvinyl acetate, acrylic resin, or a mixture thereof, There are cases where the adhesive material layer surface is easily exposed by dissolving with a paste-like material, and can be quickly applied to various construction surfaces such as an undersurface of the adhesive material layer.

Furthermore, in any of the above waterproof sheets, the soluble protective layer may have any form of a film, a nonwoven fabric, or a powdery body.

In the above waterproof sheet, the film-like soluble protective layer may be formed by applying and drying the solution of the polymer or the emulsion containing the polymer on the surface of the adhesive layer.

Furthermore, in the waterproof sheet, the powdery body constituting the soluble protective layer may be made of a foamed foamed resin material.

In any of the above waterproof sheets, the predetermined liquid or paste-like material for dissolving the soluble protective layer and exposing the adhesive layer may be a C9 solvent, limonene, mineral oil, or a mixture thereof. is there.

In any of the above waterproof sheets, the main body portion may be made of an asphalt roofing material obtained by impregnating and coating a predetermined base material with asphalt.

The present invention further provides a waterproofing method comprising the following steps to solve the above-described conventional problems.
(B) A step of applying a primer to the lower ground as required,
(B) It has an insulating part and a joint part on the back surface of the main body part, and the joint part is formed of a predetermined liquid or paste-like material in the waterproof protective sheet composed of an adhesive material layer and a soluble protective layer covering the adhesive material layer. A step of dissolving the adhesive layer by application or the like to expose the adhesive layer;
(C) A step of pasting the waterproof sheet with the adhesive layer exposed on the back surface in the step (b).

The present invention is intended to solve the above-mentioned conventional problems by providing a waterproof construction method comprising the following steps.

(A) An insulating portion and a joint portion are provided on the back surface of the main body, and the joint portion dissolves the soluble protective layer when a waterproof sheet comprising a pressure-sensitive adhesive layer and a soluble protective layer covering the adhesive layer is applied to the base. Applying a predetermined liquid or paste-like material as a primer to the construction surface;
(B) a step of dissolving the soluble protective layer while bonding the soluble protective layer of the waterproof sheet to the primer application surface before drying the primer applied in the previous step;
(C) A step of pressing and fixing the waterproof sheet to the base surface in accordance with the adhesion layer being exposed by dissolution of the soluble protective layer.

In the waterproof method, the soluble protective layer is made of any one of polystyrene, styrene butadiene rubber, polyvinyl alcohol, polyvinyl acetate, acrylic resin, or a mixture thereof. In some cases, the adhesive material layer surface is easily exposed by the dissolution means, and the adhesive material layer surface can be easily exposed to various construction surfaces such as the lower ground of the adhesive material layer.

Furthermore, in the waterproof method described above, the soluble protective layer may be configured to have any form of a film, a nonwoven fabric, or a powdery body.

And in said waterproofing construction method, the main part of the waterproof sheet is an asphalt roofing material, the powdery body constituting the soluble protective layer is a powdered foamed resin material, and the soluble protective layer is dissolved to form an adhesive layer The predetermined liquid or paste-like material to be exposed may be composed of a C9 solvent, limonene, mineral oil, or a mixture thereof.

In any one of the waterproofing methods described above, a heat-resistant sheet is applied to the melting means of the soluble protective layer, and heat is applied when a further waterproofing layer is formed thereon by a thermal asphalt method and / or a torch method. Thus, the initial adhesive force may be increased.

In the present invention, since the protective layer for preventing the adhesion of the adhesive layer is formed of resins having solubility in a predetermined liquid or pasty predetermined material, the protective layer can be simply applied or sprayed in the minimum amount necessary for construction. Since the pressure-sensitive adhesive layer that can express the bonding force immediately after being dissolved is exposed and activated, the waterproof sheet can be pasted quickly and easily. As in the past, protective films, release papers, etc. are not generated as waste.

  Since the soluble protective layer formed on the pressure-sensitive adhesive layer needs to be dissolved as quickly as possible by contacting a predetermined liquid or paste-like material, the resins forming the soluble protective layer have a surface area. It is important to make it as large as possible. For this reason, it is desirable to form the soluble protective layer with a thin film-like resin layer or a small granular resin. Formation of a thin film-like resin layer is desirable from the viewpoint of production efficiency and the like by applying and drying a target resin solution or an emulsion containing a predetermined amount of the resin.

Moreover, as resin which has a small granular form, foamed resin or its fragment is suitable, for example. Foamed resin has an infinite number of small air chambers, and a large number of holes or recesses are present in the fragments, so that the surface area is extremely large.
When the solvent comes into contact with such fragments, dissolution immediately proceeds and the protective layer covering the pressure-sensitive adhesive layer is rapidly removed, the pressure-sensitive adhesive layer is exposed, and the waterproof sheet can be immediately bonded to the ground surface or the like. . The soluble protective layer can be composed of a film made of a resin dissolved in a predetermined solvent, a nonwoven fabric, or the like. However, as described above, it is possible to form the granular body by attaching it to the surface of the pressure-sensitive adhesive layer. It is also optimal from a viewpoint. The resins forming the soluble protective layer are polystyrene, styrene butadiene rubber, polyvinyl alcohol, polyvinyl acetate, acrylic resin, or a mixture thereof. As the predetermined liquid or paste-like material in which these resins are dissolved, a C9 solvent, limonene, various mineral oils, or a mixture thereof is used.

Next, the present invention will be further described with reference to examples. FIG. 1 is a partially cutaway sectional view showing an embodiment of a waterproof sheet according to the present invention. In addition, the same code | symbol is attached | subjected and demonstrated to the same location as a prior art example.
In the figure, reference numeral 1 denotes an asphalt roofing material as a waterproof sheet main body, mineral sand 2 is scattered on the surface, and adhesive layers 3 are formed alternately with insulating parts 4 on the back. Reference numeral 6 denotes a soluble protective layer stretched on the surface of each pressure-sensitive adhesive layer 3. The soluble protective layer 6 is made of styrene foam and easily dissolves in a C9 solvent, limonene, mineral oil, or a mixture thereof as a predetermined liquid or paste-like material that dissolves the soluble protective layer 6. That is, by applying or spraying these at the construction site, the soluble protective layer 6 is rapidly dissolved and removed, and the surface of the pressure-sensitive adhesive layer 3 is exposed and can be immediately applied to the construction surface.

FIG. 2 is a partially cutaway perspective view showing the back surface structure of the waterproof sheet of FIG. In this embodiment, the foamed styrene constituting the soluble protective layer 6 is formed in a thin-band shape and is stuck to the surface of the pressure-sensitive adhesive layer 3, but the crushed or crushed foamed polystyrene is spread on the surface of the pressure-sensitive adhesive layer 3. The soluble protective layer 6 may be formed by fixing. Further, in order to increase the production efficiency, it is possible to form the soluble protective layer 6 by a transfer method as shown in FIG.
That is, in FIG. 3 (a), reference numeral 7 denotes a protective layer forming sheet that is transported through the rotating rollers R1 and R2, and this protective layer forming sheet 7 is composed of a PET film 8 and polystyrene foam as shown in FIG. 3 (b). The thin film 9 is laminated.

  The foamed polystyrene thin film 9 of the protective layer-forming sheet 7 that has reached the rotating roller R3 with the foamed polystyrene thin film 9 on the back surface (lower surface in the figure) through the rotating rollers R1 and R2 is a main body that has reached the rotating roller R3 from another direction. The asphalt roofing material 1 in the state where the asphalt roofing material 1 is attached to and in contact with the adhesive layer 3 of the asphalt roofing material 1 and the protective layer forming sheet 7 is joined to the adhesive layer 3 on the upper surface reaches the rotating roller R4. Thus, only the PET film 8 on the surface of the protective layer forming sheet 7 is pulled and peeled in the direction of the arrow, and a waterproof sheet having a foamed polystyrene thin film 9 as the soluble protective layer 6 on the surface of the pressure-sensitive adhesive layer 3 is formed. The waterproof sheet thus obtained is sprayed or applied to the polystyrene foam thin film 9 at the site of operation by spraying or applying a liquid or paste-like material composed of a C9 solvent, limonene, various mineral oils (various aroma oils) or a mixture thereof. This is melt | dissolved, the adhesive layer 3 is exposed, and it affixes on an enforcement surface. In this embodiment, the polystyrene foam having a foaming ratio of 30 times is used, and the thickness of the polystyrene foam thin film 9 as the soluble protective layer 6 is approximately 2 to 300 μm, and the time required for dissolution may be almost instantaneous.

FIG. 4 is an explanatory diagram illustrating a manufacturing process of a waterproof sheet according to another embodiment. An emulsion containing 50% or more of styrene resin is sprayed from the direction of the arrow B on the surface of the adhesive layer 3 of the asphalt roofing material 1 that moves in the direction of the arrow A through the rotating rollers R and R. By drying this styrene resin emulsion, a very thin film-like soluble protective layer 6 is formed as a polystyrene film on the surface of the pressure-sensitive adhesive layer 3 as shown in a cutaway cross-sectional view shown at C in the figure. The film thickness of the soluble protective layer 6 is approximately 5 μm or less. Such a soluble protective layer 6 is dissolved at the site of application by applying a C9 solvent, limonene, various mineral oils (various aroma oils), or a liquid or paste-like material thereof, which is required for dissolution. The time is instantaneous at 20 degrees Celsius and about 1 to 3 minutes at zero degrees Celsius.
In addition, as the liquid or paste-like predetermined material for dissolving the protective layer in this embodiment, since the styrene resin has a high SP value, a C9 solvent, limonene, and an aromatic oil as a mineral oil are used. This embodiment has an advantage that no waste is generated in the process of forming the soluble protective layer 6.

In addition, after attaching an asphalt roofing waterproof sheet to the base, a waterproof layer may be further formed by a thermal method, and in this construction, the dissolving means of the soluble protective layer of the asphalt roofing waterproof sheet is the C9 The initial adhesive force can be increased by using heat from the heat method in addition to the system solvent, limonene, various mineral oils (various aroma oils) or a mixture thereof.

In this embodiment, the soluble protective layer 6 is made of foamed polystyrene powder that is coated or coated on the adhesive layer 3. During construction, after applying a predetermined amount (50 g / m 2) of limonene to the soluble protective layer 6 and pasting it on the base (slate plate), the asphalt roofing material as its waterproof sheet is further applied. A second waterproof sheet layer was formed from hot asphalt heated to 240 degrees Celsius.
FIG. 5 is a table showing the measurement results of the interface temperature between the slate plate substrate and the adhesive material in the above example. Table 1 shows the case where the outside air temperature during construction is 0 degrees Celsius, and Table 2 shows the case where the outside air temperature during construction is 25 degrees Celsius. Is shown.
As is apparent from Tables 1 and 2, due to the heat during the thermal asphalt construction, the temperature of the slate plate substrate and the adhesive interface rises to 30 degrees Celsius at an outside air temperature of 0 degrees Celsius, and the outside air temperature is 25 degrees Celsius. Rises to 40 degrees Celsius. As the temperature of the interface between the substrate and the adhesive increases, the protective layer covering the waterproof sheet can be instantly dissolved with a solvent such as limonene, and the initial adhesive strength and the subsequent adhesive strength are increased. The experimental results are shown in the graph of FIG. Graph 1 is for a construction temperature of 0 degrees Celsius, and graph 2 is for a construction temperature of 25 degrees Celsius.
Contents of the experiment related to the graph of FIG. 6 Purpose: To confirm the effect on the adhesive strength due to the residual heat of the thermal asphalt.
Evaluation method: Strength transition test condition in 180 degree Celsius peel test:
Fixed condition
Thermal asphalt construction temperature: 240 degrees Celsius
Limonene coating amount: 50g / square meter
Time from limonene construction to thermal asphalt construction
Variable conditions
Construction temperature: 0 degrees Celsius, 25 degrees Celsius

From the results of each experiment, the strength immediately after attaching the waterproof sheet is sufficient to temporarily fix the waterproof sheet even when it is attached with limonene alone. It turns out that higher strength can be expected.
Similar results are also obtained with C9 solvents, C9 solvents, limonene, various mineral oils (various aroma oils), or mixtures thereof.

Up to now, the present invention has been limited to asphalt waterproofing. However, the present invention can be applied to a method of dissolving and bonding a waterproof sheet body or a part thereof with a solvent or the like. That is, as is well known, there is a method of attaching a vinyl chloride waterproof sheet as one of the waterproof methods, but in this vinyl chloride waterproof sheet, a vinyl chloride foam layer is formed on the affixed surface, and the conventional foam layer is applied to this foam layer at the time of enforcement. Applying adhesive such as THF (tetra-hydrofuran) will quickly dissolve the foamed layer, so it will not take time to develop adhesive strength like conventional vinyl chloride waterproof sheets. The waterproof sheet can be immediately fixed to the working surface.

It is a partially cutaway sectional view showing one example of a waterproof sheet according to the present invention. FIG. 2 is a partially cutaway perspective view showing a back surface structure of the waterproof sheet of FIG. It is explanatory drawing which shows formation of the soluble protective layer 6 by the transfer method. It is explanatory drawing which shows the manufacturing process of the waterproof sheet which concerns on another Example. It is a table | surface which shows the effect of the residual heat of the thermal asphalt in Example 3. 10 is a graph showing a change in strength in Example 3. It is sectional drawing which shows the example of the conventional waterproof sheet.

Explanation of symbols

1. . . . . . Asphalt roofing material
2. . . . . . 2. Mineral sand . . . . . 3. Adhesive layer . . . . . Insulating part 6. . . . . . Soluble protective layer

Claims (9)

It has a main body part and a joint part formed on both surfaces of the main body part or any one surface, and the joint part is constituted by an adhesive material layer and a soluble protective layer for covering the surface of the adhesive material layer to prevent adhesion. Waterproof sheet characterized by. 2. The waterproof sheet according to claim 1, wherein the soluble protective layer is made of a polymer such as polystyrene, styrene butadiene rubber, polyvinyl alcohol, polyvinyl acetate, acrylic resin, or a mixture thereof, and is a predetermined liquid or paste-like material. A waterproof sheet that dissolves easily and exposes the surface of the adhesive material layer so that it can be quickly applied to various construction surfaces including the ground of the adhesive material layer. 3. The waterproof sheet according to claim 2, wherein the soluble protective layer is a film, a nonwoven fabric, a powder, a foamed shape, or a coating / drying film on the surface of an adhesive layer of an emulsion containing a solution of the polymers or a polymer. A tarpaulin characterized by being. 4. The waterproof sheet according to claim 1, wherein the predetermined liquid or paste-like material for dissolving the soluble protective layer and exposing the adhesive material layer is a C9 solvent, limonene, mineral oil, or a mixture thereof. A waterproof sheet characterized by that. Waterproofing method consisting of the following steps.
(B) A step of applying a primer to the lower ground as required,
(B) It has an insulating part and a joint part on the back surface of the main body part, and the joint part is formed of a predetermined liquid or paste-like material in the waterproof protective sheet composed of an adhesive material layer and a soluble protective layer covering the adhesive material layer. A step of dissolving the adhesive layer by application or the like to expose the adhesive layer;
(C) A step of attaching a waterproof sheet having an adhesive layer exposed on the back surface to the base surface in step (b). Waterproofing method consisting of the following steps.
(A) An insulating portion and a joint portion are provided on the back surface of the main body, and the joint portion dissolves the soluble protective layer when a waterproof sheet comprising a pressure-sensitive adhesive layer and a soluble protective layer covering the adhesive layer is applied to the base. Applying a predetermined liquid or paste-like material as a primer to the construction surface;
(B) a step of dissolving the soluble protective layer while bonding the soluble protective layer of the waterproof sheet to the primer application surface before drying the primer applied in the previous step;
(C) A step of fixing the waterproof sheet to the base surface by pressing the adhesive layer as the adhesive layer is exposed by dissolution of the soluble protective layer. 7. The waterproof construction method according to claim 5, wherein the soluble protective layer is a film, a nonwoven fabric, or a powdery body made of any one of polystyrene, styrene butadiene rubber, polyvinyl alcohol, polyvinyl acetate, acrylic resin, or a mixture thereof. The adhesive material has a foamed shape or a form of a coating dry film on the surface of the adhesive material layer of the polymer solution or the emulsion containing the polymer, and is dissolved by application of a liquid or paste-like predetermined material or other dissolving means. A waterproofing method characterized in that the layer surface can be easily exposed and can be quickly attached to various construction surfaces such as the ground of the adhesive layer. 8. The waterproof construction method according to claim 7, wherein the main body portion of the waterproof sheet is an asphalt roofing material, and the powdery body constituting the soluble protective layer is a powdered foamed resin material or a solution of the polymers or an emulsion containing the polymers. The coating or dry film on the surface of the material layer, and the liquid or paste-like predetermined material for dissolving the soluble protective layer and exposing the adhesive material layer were each composed of a C9 solvent, limonene, mineral oil or a mixture thereof. Waterproof construction method characterized by that. 9. The waterproof method according to claim 5, wherein a waterproof sheet is attached to the base for the dissolving means of the soluble protective layer, and a further waterproof layer is formed thereon by a thermal asphalt method and / or a torch method. A waterproofing method characterized by adding initial heat to increase initial adhesion.

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