JPH01278648A - Exposure waterproof finished sheet - Google Patents

Abstract

PURPOSE:To improve the efficiency of exposure waterproof execution by applying a removable protective cover member to the surface of a finished sheet. CONSTITUTION:A removable protective cover member 2 is applied on the surface of a finished sheet 1 used on the uppermost layer of an exposure waterproof sheet. Thus, since the surface of the finished sheet 1 is not stained in the execution, the efficiency of the execution can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a finishing sheet that is applied to the top layer when exposed waterproofing is performed in waterproofing work for buildings.

[Prior art]

Waterproofing work is divided into two types: so-called press waterproofing, in which a protective layer such as concrete is placed on top of the completed waterproofing layer, and exposed waterproofing, in which the construction is completed with the waterproofing layer exposed and ready for use. Separated.

The top layer in exposed waterproofing is always exposed, unlike in presser waterproofing, so it must be particularly weather resistant and durable. In addition, since the exposed waterproof top layer is exposed to the outside as one side of the building, a beautiful finish is also required.

Furthermore, as a recent trend, the number of buildings with unique exteriors has increased,
As a result, exposed waterproofing is often applied not only to flat roofs, such as rooftops, but also to sloped surfaces.

Particularly in the case of pitched roofs, the exposed waterproof layer is exposed to the public's eye as often as the exterior wall surface, and design is increasingly required in addition to aesthetics.

Currently, asphalt waterproofing and sheet waterproofing using synthetic polymer sheets are overwhelmingly used for exposed waterproofing work.

In the case of asphalt waterproofing, the overwhelming majority is the so-called thermal method in which a waterproof layer is formed by laminating multiple layers of asphalt roofing while using molten asphalt as an adhesive, and the top layer of the exposed waterproof layer is coated with asphalt or modified. Roofing with sand, which is made by scattering sand grains on the surface of asfilt roofing, is often used. With sand-covered roofing, the sand grains act as a protective layer, so deterioration of the asphalt or modified asphalt layer directly under the sand grains due to ultraviolet rays, etc. can be prevented to some extent.Moreover, due to the shading and texture of the sand grains, colored sand grains can be prevented. By using , it also has an aesthetic and design quality. In addition, as a finishing sheet for asphalt waterproofing, asphalt or modified asphalt roofing with metal foil laminated on the top layer is also used instead of partially sanded roofing. Metal foil minimizes deterioration of the underlying coating layer, and the use of colored or embossed metal foil provides an excellent aesthetic appearance.

In the case of sheet waterproofing, by far the most common case is to form a waterproof layer using a single sheet of synthetic polymer while pasting it together using an adhesive, so the sheet used becomes the exposed waterproof finishing layer as it is. For this reason, materials with particularly excellent weather resistance and durability are used.Currently, EPDM-based vulcanized rubber sheets are the most commonly used, followed by PvC sheets.In both cases, pigments are mixed in to create colorful colors, and the sheet surface is coated with Efforts have been made to give the sheets a beautiful appearance and design by applying chromatic paints and embossing the sheet surface to create patterns.

Unfortunately, with the conventional finishing materials mentioned above, the beautiful surface of the finished material is often contaminated by adhesives, asphalt, and other adhesives during construction, resulting in a poor finish. That is, the adhesive inevitably adheres to the soles of gloves and shoes during work, and the surfaces become dirty every time the worker touches the finished material with his hands or walks.

Furthermore, excess adhesive or asphalt protrudes from the joints between the finishing materials, spoiling the aesthetics. For this reason, efforts are made to maintain a clean finish by frequently replacing gloves and gloves, and pasting curing tape on areas where excess adhesive or asphalt is expected to protrude. There are limitations, and in the end, not only will it make a mess, but work efficiency will also drop significantly. In particular, in the case of thermal asphalt waterproofing, since the finish sheet is pasted while spreading a large amount of molten asphalt, and the asphalt itself is black, the degree of staining is much worse than in the case of sheet waterproofing, and the shoes are dirty. You can't expect any effect from changing gloves at all.

Therefore, in both asphalt waterproofing and sheet waterproofing, dirt during construction is usually ignored to some extent, and there are many cases in which paint is applied to the entire surface of the construction machine to improve the appearance. However, this also causes uneven coating and results in a very flat finish, making it difficult to obtain a satisfactory finish. Moreover, this lengthens the construction period and increases costs. Furthermore, even after waterproofing work has been completed, workers in other occupations often continue to work on or around the waterproofed surface, and in doing so, they often inadvertently stain or damage the waterproofed surface. It happens.

〔the purpose〕

The present invention relates to a finished sheet for exposed waterproofing that can reasonably and economically solve the above-mentioned problem of surface contamination during construction, which occurs in the top layer of conventional exposed waterproofing.

[Means to solve the problem]

The exposed waterproof finishing sheet of the present invention is characterized in that the surface of the finishing sheet is coated with a removable protective material.

The configuration of the present invention will be explained with reference to FIG.

A protective material 2 is adhered to the surface of the exposed waterproof finishing sheet 1. This protective material 2 must be firmly attached to the surface of the finishing sheet 1 to the extent that it will not peel off during construction when the finishing sheet 1 is pasted by conventional methods using adhesives, asphalt, etc. It is pasted. During construction, the surface of the finishing sheet 1 is always covered with the protected forest 2 and is not exposed.

After the construction is completed, this protective material 2 can be easily peeled off and removed from the surface of the finishing sheet 1 as needed, and the finishing sheet 1 is exposed to the surface only after it is removed. .

In addition to attaching the protective material 2 over the entire surface of the finishing sheet 1, depending on the joining method between the sheets, it may be applied with a partial retreat as shown in FIG. This is convenient because it eliminates the need to remove the protective material from each section during construction.

The type of finishing sheet 1 may be either an asphalt waterproofing type sheet or a sheet waterproofing type sheet, as long as it is a sheet conventionally used for exposed waterproof finishing materials.
Those with excellent design and weather resistance are preferred.

In the case of asphalt waterproofing, roofing with sand is generally used, but it is more preferable to use asphalt laminated with metal foil or modified asphalt roofing, which has better aesthetics and durability. It is even more preferable to use a metal foil that has been previously colored with a highly durable paint or embossed with a desired pattern.

Aluminum, iron, copper, stainless steel, etc. are used as the metal foil, and aluminum is preferable since it is well-balanced in terms of workability, workability, economy, and durability.

Also, instead of metal foil, PVC, EPDM, Hypalon,
Asphalt or modified asphalt roofing made of laminated films or sheets of synthetic polymers with excellent weather resistance such as fluororesin may also be used.

When using a sheet waterproofing system as the finishing sheet 1, PVC and EPDM, which are generally used for exposed waterproofing, are used.
, Hypalon, etc. are preferred.

Next, as for the protective material, a pressure-sensitive adhesive type is preferable in consideration of final peeling and removal, and a material in which an adhesive layer is laminated on a base material such as paper or film is used. Regarding the degree of adhesion, consider that during construction, you may rub the protective material on the surface of the sheet with dirty gloves, or apply adhesive or asphalt to the protective material with the material attached to the back of the shoe. The protective material must not peel off or tear from the sheet surface even when walked on. For this purpose, the protective material usually has an adhesion force of about 50 g/inch or more to the sheet surface and a tear strength of about 20 g or more so that it will not cause problems during construction. However, when pasting sheets using the asphalt thermal construction method, it is better to stick them more strongly, especially since the asphalt is highly sticky at high temperatures.
Preferably, the adhesive strength is about 100 g/inch or more.

Also, if you consider peeling off and removing the protective material, it will take about 2
If the peel strength is 00 g/inch or less, it can be easily peeled off and removed.

Therefore, the degree of adhesion of the protective material is preferably in the range of about 50 g/inch or more and 200 g/inch or less.

Also, regarding the material of the adhesive layer, the adhesive layer deteriorates between the time the waterproofing work is completed and the time the protective material is peeled off, making it extremely difficult to peel and remove the protective material, or the finishing sheet It is preferable to use one with excellent weather resistance so that no adhesive layer remains on the surface.

The base material for the protective material can be selected depending on the method of pasting the finishing sheet, and usually an inexpensive synthetic resin film such as polyethylene or polypropylene is sufficient, but it is especially suitable for finishing sheets for thermal construction. In that case, 20
Since the sheets are pasted with high-temperature asphalt at a temperature of about 0 to 300°C, it is preferable to use single paper or a laminate of paper and synthetic resin film, especially a laminate of polypropylene or polyethylene film to prevent the protective material from melting or deforming due to heat. .

In addition, when applying the back side of a finishing sheet made of asphalt or modified asphalt by heating and melting it with a burner using the so-called torch method, there is a risk that the protective material may melt or burn due to the flame of the burner. It is a good idea to use a non-flammable protective material such as ceramic paper on the protective material that is directly exposed to the flame of the burner.

Furthermore, in the case of paper, it is assumed that after construction, it will absorb water due to rainfall, resulting in a significant decrease in strength, making it impossible to peel and remove the protective material.

Therefore, it is also preferable that the surface of the paper be treated with water repellent treatment or laminated with a thin film of inexpensive synthetic resin such as polypropylene or polyethylene.

〔Example〕

Example 1 A polyvinyl chloride sheet was used as the finishing sheet 1, and a polyethylene film with an adhesive layer was used as the protective material 2. As the peelable adhesive material, an acrylic rubber adhesive material coated at a rate of 20 g/square meter was used. The peel strength of the protective material was 65 g/inch.

Example 2 A synthetic fiber non-woven fabric was selected as the base material 5, and its upper and lower surfaces were coated with improved asphalt as coating layers 4, 4', mineral powder particles as an anti-adhesive material 6 were applied to the lower surface, and colored sand particles 3 were applied to the upper surface.
are adhered to each, and polyethylene film laminated kraft paper (layering order: polyethylene film, kraft paper, adhesive material) is further laminated as a protected forest 2 on the top surface using a removable adhesive material.

An acrylic rubber adhesive was used as the removable adhesive. The peel strength of the protective material was 150 g/inch.

Example 3 Coatings M4 and 4' made of improved asphalt were formed on both upper and lower surfaces of a synthetic fiber nonwoven fabric as a base material 5, mineral powder particles as an adhesive waterproofing material 6 were applied to the lower surface side, and metal particles were applied to the upper surface thereof. As foil 7, embossed colored aluminum foil is laminated,
The top layer is polyethylene film laminated kraft paper using a removable adhesive (layering order: polyethylene film,
Kraft paper, adhesive material) were laminated.

As the removable adhesive material, an acrylic rubber adhesive material was used.

Peel strength was 130 g/inch.

〔effect〕

If the exposed waterproof finishing sheet of the present invention as explained above is used, even if it is applied using conventional adhesives, molten asphalt, etc., it will not stick to the surface of the finishing sheet. Due to the protective material provided, the surface of the sheet will not be contaminated at all during construction. In addition, there is no need for extremely troublesome care such as frequently changing shoes and gloves, and there is no problem even if the construction is carried out normally. Therefore, work efficiency is further improved. After construction, the protective material can be removed when other construction work is completed, revealing a beautifully finished sheet surface that is completely uncontaminated.

Especially when constructed using the asphalt thermal method.

Since there is no staining caused by black asphalt, the finish is much improved compared to conventional thermal construction methods.

Furthermore, when metal foil laminated asphalt or modified asphalt roofing is used, a finished surface with even greater beauty, design, and durability can be obtained, which further enhances the image of the finish achieved by conventional thermal construction methods.

Furthermore, damage to the surface of the finishing sheet during application of the finishing sheet or during other construction work can be avoided to a considerable extent. Of course, since there is no need for the conventional paint application work to improve the appearance, the construction period is shortened and the economic burden is also drastically reduced.

[Brief explanation of the drawing]

1 to 4 are cross-sectional views showing various aspects of the exposed waterproof finishing sheet of the present invention. 1... Finishing sheet 2... Protective layer 3... Sand grains 5... Base material 6... Adhesive waterproofing material 7... Metal foil patent applicant Tajima Roofing Co., Ltd. Agent Patent attorney Sa 1) Mamoru 2 males, 1 cold bird, 4 birds

Claims (1)

[Claims] 1. A finishing sheet for exposed waterproofing used as the top layer of exposed waterproofing, characterized in that the surface of the sheet is covered with a removable protective material.