JPH0449195Y2 - - Google Patents

Description

[Detailed explanation of the idea] Industrial applications The present invention relates to a waterproof sheet for use as a base for painting.

Conventional Technology As a base for painting mainly wooden buildings, whether for interior or exterior, lath mortar surface using waterproof paper such as asphalt felt or tar felt and metal lath is overwhelmingly used.

Problems that the invention aims to solve However, in the conventional construction method described above, many holes are made in the waterproof paper by the staples used to attach the metal lath, and the moisture seeping through these holes can cause corrosion of the loose boards and plywood of the base panel. It has been pointed out that this can significantly shorten the lifespan of housing. Furthermore, since painting can be performed after the mortar has sufficiently hardened and dried, it is common knowledge to provide a mortar curing period of at least two weeks or more. If you begin painting work before the paint has sufficiently cured and dried, it may adversely affect the adhesion of the paint and cause accidents such as cracking and peeling.

In order to prevent water from entering through the holes created by staples, attempts have been made to use waterproof sheets made of adhesive non-vulcanized synthetic rubber or rubber/asphalt in place of waterproof paper, and this method has become more reliable. It's starting to get picked up.

However, the problem of mortar curing period still remains, and the construction period has not been shortened.

Although it is possible to omit the mortar work and apply the paint directly to the surface of these waterproof sheets, the adhesion of architectural paints to the surface of rubber compounds is far from sufficient, and especially paints for butyl rubber waterproof sheets (mainly The adhesion of synthetic resin emulsion paints is extremely poor. Furthermore, the softener in the rubber compound may leak into the paint film, causing discoloration and staining of the paint film.

On the other hand, some recent paints have a relatively high degree of waterproofness, and are sometimes applied directly to the base panel without waterproofing or mortar work, but the scum from the base panel may ooze out. This is not a desirable construction method as it can stain the paint film and cause cracks in the paint film at the joints of the underlying panels.

The present invention was made with the aim of eliminating these conventional problems.

Means for Solving the Problems The present invention is characterized in that a composite material having a synthetic fiber non-woven fabric as a surface layer and a synthetic resin film as a back layer is pasted on the top surface of an adhesive rubber sheet to form a paint adhering surface. Pertains to waterproof sheets for painting bases.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.

The waterproof sheet for a paint base according to the present invention includes an adhesive rubber sheet 1 as a waterproof layer. The adhesive rubber sheet 1 contains adhesive non-vulcanized rubber as a main component, and examples of the non-vulcanized rubber include natural rubber, synthetic rubber compounds (such as butyl rubber, polybutadiene, styrene-butadiene rubber, etc.),
Examples include recycled rubber and rubber/asphalt compounds obtained from blends of rubber and asphalt. Rubber sheet 1 from such non-vulcanized rubber
When molding, tackiness improvers, fillers, etc. can be added and kneaded as necessary. Although the thickness of the adhesive rubber sheet 1 is not particularly limited, it is suitably about 0.3 to 2.0 mm, particularly about 0.5 to 1.2 mm.

A synthetic fiber nonwoven fabric 2 is placed on the top surface of the adhesive rubber sheet 1.
A composite body 2 having a surface layer a and a synthetic resin film 2b a back layer is pasted using the adhesiveness of the rubber sheet 1, for example.

The surface synthetic fiber nonwoven fabric 2a of the composite 2 is
It is used to form a paint adhering surface on the surface of the waterproof sheet, and it is preferable to use synthetic fibers that have good adhesion to paint and high strength as possible for the nonwoven fabric 2a, such as polyester fibers. , polyolefin fibers, nylon fibers, etc. can be advantageously used. Nylon fibers are particularly preferred because they have good water absorption and are compatible with paints. The basis weight of the synthetic fiber can be selected from a wide range, but 20 to 100 g/m ² , particularly about 30 to 50 g/m ² is appropriate.

On the other hand, the synthetic resin film 2b of the back layer is for preventing the softening agent and the like in the rubber sheet 1 from oozing out and transferring to the nonwoven fabric 2a side, and it is preferable to use a synthetic resin film that has as good an effect of preventing oozing as possible. For example, synthetic resin films such as polyester and polyolefin can be advantageously used.

If the thickness of the film is too thin, it will not be able to sufficiently prevent oozing, and if it is too thick, it will increase the weight burden and cost, but hardly any improvement in the oozing prevention effect can be expected. Especially 10
~30μ is appropriate. Synthetic resin film 2b
is bonded and integrated with the nonwoven fabric 2a by applying adhesive bonding means or thermal welding means. In the diagram, 3
is a release paper stuck to the back side of the adhesive rubber sheet 1.

A practical use of the waterproof sheet of the present invention is shown in FIG.
will be affixed to. When pasting this, apply chloroprene solvent-based adhesive (Sekai Nagaku) to the base panel a in advance.
Co., Ltd., product name: Everbond-NP-2) or a styrene-butadiene rubber latex adhesive (Sekaicho Co., Ltd., product name: Everbond CL-2) as primer b. , the adhesiveness of the adhesive rubber sheet 1 to the base panel a can be further improved. In the present invention, the waterproof sheet can be attached to the base panel a using the adhesiveness of the rubber sheet 1, so as the base panel a,
It may be made of a brittle material that cannot be stapled, such as plywood, gypsum board, calcium silicate board, particle board, or hardboard.

By pasting the waterproof sheet of this invention, the base panel a
A paint adhering surface is formed on the surface, and this paint adhering surface is made of a synthetic fiber nonwoven fabric 2a. When the paint is directly applied to the surface of the non-woven fabric 2a by appropriate means such as spraying, roller coating, or brush coating, the paint entangles and firmly adheres to the non-woven fabric 2a, thereby achieving the desired paint finish. c can be easily formed, and there is no need to form a mortar base as seen in conventional construction methods.

A rubber sheet 1 is interposed between the paint finish c formed in this way and the base panel a,
This prevents moisture, humidity, etc. from entering the base panel a side, so the painted part c does not need to be particularly waterproof. Therefore, the film thickness and pattern of the paint finish c are no longer subject to restrictions in terms of waterproofing, and the paint finish c can be formed from a thin material such as ricin or a discontinuous material such as beading, for example. . Furthermore, due to the waterproof effect of the rubber sheet 1, even non-water resistant materials can be used as the base panel a without any problems, and the base panel a can be protected from water and moisture for many years, preventing corrosion of the base panel a. .

Furthermore, since the rubber sheet 1 is stretchable and has cushioning properties, it can absorb the movement of the base panel a due to aging, prevent the occurrence of cracks in the paint finish c, and prevent the synthetic resin between the paint finish c and the rubber sheet 1 from forming. Since the film 2b prevents the softening agent in the rubber sheet 1 from oozing out to the painted finish c, and further preventing contamination and cracking of the painted finish c, which is a concern due to the oozing migration, the formation of a mortar base is omitted. No matter what, you can maintain a beautiful appearance forever.

In this way, the waterproof sheet for painting bases of the present invention allows paint to be applied directly to the base panel surface, without any deterioration in the quality or performance of the paint finish, and therefore without the need to form a mortar base. It is now possible to apply a paint finish, simplifying the painting process,
It has the advantage of shortening the construction period and reducing construction costs.

[Brief explanation of the drawing]

FIG. 1 is a partially enlarged sectional view showing an embodiment of the present invention, and FIG. 2 is a partially enlarged sectional view showing one usage situation. In the figure, 1 is an adhesive rubber sheet, 2 is a composite,
2a is the synthetic fiber nonwoven fabric, 2b is the synthetic resin film, and 3 is the release paper.

Claims (1)

[Scope of utility model registration request] A waterproof sheet for use as a paint base, characterized in that a composite material having a synthetic fiber nonwoven fabric as a surface layer and a synthetic resin film as a back layer is pasted on the top surface of an adhesive rubber sheet to form a paint adhering surface.