JPH1181623A - Member for civil engineering and construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve quality by stacking a restoring sheet and a adhesive sheet on an unhardened reaction hardening resin applied on a foundation base, and removing the same after hardening. SOLUTION: A restoring sheet 4 formed by a polyester film or the like and adhesive sheet 3 are sequentially stacked below the surface side resin layer 2 and integrated therewith to construct a member 1 for civil engineering and construction. In manufacturing the member 1, after the resin layer 2 is applied onto the plastics foundation base plastics while the resin layer 2 is unhardened, a restoring sheet 4 and a adhesive layer 3 are placed and pressed to the resin layer 2, and a peeling paper sheet 5 is stuck thereto at need. Secondly, the member 1 formed after the resin layer 2 is hardened is removed from the foundation base 1. Thus, the restoring sheet is provided between the resin layer and the adhesive sheet, whereby even if the lower surface of the adhesive sheet is uneven, the resin layer can be kept in a designated shape, and as the restoring sheet is integrated with hardening of the resin layer, the restoring force can be increased. Furthermore, the resin layer can be made thinner by the existence of the restoring sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a member for civil engineering and construction. Civil engineering building materials are walls, floors, ceilings,
It is used as a surface member such as a pillar or a structural member.

[0002]

2. Description of the Related Art The exterior wall of a building or the like is the appearance itself of the building, and should determine the aesthetics of the building. Both the designer and the owner of the building place great emphasis on the decorativeness and aesthetics. Therefore, the surface of the concrete is not simply subjected to waterproofing only, but surface finishing including decorative elements is always performed. As a conventional method for finishing an outer wall, there are a spraying material application, a tile covering, a natural stone covering, a brick covering and the like.

[0003] In recent years, lighter materials have been favored, and thin resin molded products are being used. This is either glued to the outer wall with an adhesive or fixed with bolts, and the construction is simple.

[0004]

However, such an outer wall material has the following disadvantages. Tiles and bricks require a lot of time and labor to construct, and the construction period is long. Also, it takes a long time to fix it with an adhesive or a bolt on site.

On the other hand, when a thin resin layer having a beautiful surface is formed on a substrate, if the strength or hardness of the substrate is insufficient for the force applied from the environment, the surface thin resin layer is formed. It may deform and impair the aesthetic appearance, and may also deteriorate other physical properties (such as waterproofness).

[0006]

In view of the above situation, the present inventor has completed a member for civil engineering and construction according to the present invention, and the feature thereof is that a reactive curable resin is provided on a substrate. At the point where the resin is uncured, a restoring sheet is placed from above, furthermore, an adhesive sheet is placed, and the reaction is cured and removed from the substrate, and in another aspect,
An adhesive sheet, a restoring sheet is placed thereon, and then a reactive curable resin is applied thereon, and at a time when the resin is not cured, the substrate is placed from above and the resin is reacted and cured. The point is that the substrate has been removed.

The present invention provides a method for preventing deformation of a resin layer.
Rather than simply providing a high-strength reinforcing material as in the prior art, it has been developed so as to be self-restoring even if deformed to some extent.

Here, the substrate is used for imparting various shape properties to the surface of the resin when the resin is cured, and the material may be plastic, metal, glass or the like. The various geometric properties include a simple smooth surface, a pattern having a smooth surface and an uneven surface, a pattern having a step, and a combination thereof. The smooth surface is literally smooth, and is a smooth portion such as a surface of glass or the like. The uneven surface means that the surface is free from fine irregularities such as sand blast, a natural stone flap finish style, a burner finish style, or the like, that is, it is not smooth. It also includes a non-smooth flat surface.

[0009] In short, various geometrical properties may have any shape and any surface condition, and mean only a desired form. Of course, characters, figures, and the like are naturally one type of shape.

[0010] It is also possible to move the substrate like a belt on a belt conveyor and to cure it on a long belt for continuous production. At this time, the substrates may be separated one by one or may be long like a belt.
If it is long, it may be cut into a desired size after curing or after semi-curing. Further, a type such as a parts feeder for feeding a resin by vibration without moving it like a conveyor may be used. It is shaped like a rectangular gutter.

[0011] When used on a moving belt, a plastic film or sheet such as polyethylene or polyvinyl chloride is inexpensive and suitable as the substrate. Particularly, a film or sheet obtained by embossing a film or a sheet is most suitable for producing subtle irregularities.

The problem here is the releasability between the substrate and the cured resin. Those with poor releasability require treatment such as applying a release agent to the substrate. However, when a release agent is applied, the substance impairs the smoothness of the substrate or the release agent penetrates the resin, thereby impairing the smoothness (macro or microscopic) of the cured resin. There are cases.
In order to prevent these, it is important to manufacture the substrate itself with good peelability. In the experiment of the inventor, a so-called resin hard coat was suitable. This is a polymer having a three-dimensional structure that is ultraviolet-cured with an acrylic resin. If this is used as a substrate or coated on the surface, very good peeling can be obtained. In addition, since no release agent is used, smoothness is also ensured.

The reaction-curable resin is a kind of plastic that reacts and cures, and is used as a concept including a monomer, a prepolymer, and a resin mortar before polymerization. One-pack type or two-pack type may be used. Usually, a curing agent is mixed, and the temperature rises slightly (about 80 ° C.) at the time of curing, and the reaction hardens in many cases. Of course, if a curing agent is mixed in, it may be cured immediately without raising the temperature. Further, the polymerization may be started by light or ultraviolet light.

Naturally, a conventional spraying material can be used as the resin used in the present invention. However, since the resin of the present invention needs to be cured or solidified while being sandwiched between the base material and a mold member described below, those requiring a high temperature, those using a solvent, and low molecules volatilize. Type (emulsion type etc.) is difficult to use. This is because the solvent and water of the emulsion do not volatilize because the upper and lower portions are covered.

Those which satisfy this requirement are those which undergo vinyl polymerization such as acrylate and those which undergo addition polymerization, and those which do not require very high temperatures are preferred. For example, acrylate, epoxy, etc. Particularly, methyl methacrylate (MMA) was suitable.

It is desirable to incorporate pigments and dyes into the monomer or resin in order to produce various colors. Further, it is free to add an additive used for a usual spraying material without directly relating to the present invention.

The most important point for obtaining the natural stone appearance is to mix the resin with the aggregate. Aggregate is natural stone,
It is a ceramic or the like and contains many oxides and hydroxides of metals. The size varies from powder to several mm. By mixing the aggregates of different colors, it becomes granite-like or marble-like. Further, luminous minerals or luminous ceramics may be used for aggregates or crushed aggregates. The luminous minerals here are those that appear to be different in color from themselves when irradiated with ultraviolet light. Therefore, what appeared to be blue due to sunlight during the daytime disappears at night and becomes red when irradiated with ultraviolet light. Of course, complex patterns and characters can also appear by combining various colors.
Of course, a normal luminous type may be used instead of the luminous type.

The main reason why the cured resin has the appearance of a natural stone-like luster is that ceramic sand (ceramic sand), powdered stone and other solids mixed with the resin precipitate downward due to gravity, and the resin upward. This is because the components are increased and the surface of the surface is provided with a smooth-type member, so that the surface becomes very smooth and glossy after curing the resin. This luster is very close to the polished state of natural stone, making it difficult for a viewer to distinguish it from natural stone.

In recent years, patterns that have no special meaning, such as pale colors that do not exist in nature, subtle combinations of various colors, and geometric patterns in which the primary colors are clear, have been favored. . The appearance of these patterns is also possible with the resin of the present invention. Combination with pigment, degree of mixing, aggregate size,
Depending on the selection of the viscosity of the resin and the like, a fantastic color tone that can not be imagined is obtained.

Instead of one kind of resin, a plurality of resins may be prepared and applied in layers. For example, a transparent resin is first applied on a substrate, and a resin containing an aggregate is applied in a semi-cured state. By doing so, a thin transparent layer is formed on the surface side, and the gloss becomes deeper. The thickness of the transparent surface layer is preferably about 0.1 to 2.0 mm, but depending on the type, a thick transparent part, for example, 2.0 mm or more is possible. For the purpose of further preventing the deformation of the resin layer, a top coat may be applied to the surface.

The restoring sheet is a sheet-like sheet that deforms in response to an applied force, but substantially recovers its original shape when the force is released. The shape of the restoration sheet is film, plate (including holes), net, cloth, paper,
There is a honeycomb shape or the like. The reinforcing force described above with these,
The material may be selected so as to have a restoring force. The film or the like does not appear to have a repulsive force (restoring force) by itself, but the unevenness of the resin layer is repaired relatively well by being integrated with the reaction curable resin. Examples of the film include a polyester resin, a polyphenylene sulfide resin, a polyacryl resin, a polyimide resin, a polyolefin resin, and a polyamide resin. A uniaxially or biaxially stretched and oriented film is preferable.

Examples of the plate-like material include a rubber plate, a plastic plate, a metal plate, a resin-impregnated fabric, and a plastic foam. Rubber or the like having a large restoring force is preferable.

These can be easily adhered when cured.
Surface treatment such as corona discharge treatment and blast surface treatment may be performed. Further, a resin having a net-like hole or the like is more integrated because the resin before curing enters.

The adhesive sheet is a sheet having at least one surface having adhesiveness, and may be a commercially available so-called butyl rubber sheet. Of course, the present invention is not limited to this, and an adhesive applied to a core material such as plastic or metal may be used. If there is no core material, net in the sheet,
A material containing a reinforcing material such as cloth may be used. The adhesiveness of the adhesive sheet may be only on one side. That is, the side fixed to the resin is fixed by the curing of the resin. Further, the adhesive strength of the adhesive sheet needs to be such that it does not drop for a long time when used on a wall surface or the like, but may be relatively weak when used on a floor or the like. It may be almost non-slip. This adhesive sheet is pre-bonded to the restoration sheet,
It may be integrated by adhesion or other methods.

It is better to attach a release sheet (paper or the like) to the adhesive surface of the adhesive sheet. This may be applied before fixing to the resin or after fixing.

The size of the member for civil engineering and construction according to the present invention is as follows.
The thickness is not particularly limited, but is preferably about 1.5 to 10 mm. This is because it is lightweight and it does not make sense to make it thicker. In addition, the size may be the same as that obtained by slicing a normal natural stone, but may be smaller or larger due to its light weight. Of course, not only a flat shape but also a curved shape (which can be used for a pillar or the like) may be used, and the outer shape may be not only a rectangular shape but also a polygonal shape or a circle. They are,
The substrate can be easily manufactured by bending the substrate or dividing it into a circle.

As a manufacturing method of the present invention, a substrate is used as a base and sequentially applied or laminated thereon, but the reverse method is also possible. That is, the adhesive sheet is placed first, then the resin, and then the substrate.

[0028]

FIG. 1 is a sectional view showing an example of a member 1 for civil engineering and construction produced by the method of the present invention. A resin layer 2 is provided on the front side, and an adhesive sheet 3 is fixed below the resin layer 2, and a restoration sheet 4 is sandwiched between the two. The restoration sheet 4 of this example is a plastic film made of polyester and having a thickness of 0.3 mm. A release paper 5 is removably attached below the adhesive sheet 3 for convenience of handling.

FIGS. 2A to 2C are process diagrams showing a method for manufacturing the civil engineering building member 1 of the present invention, and FIG. 2A shows a state in which the substrate 6 is filled with resin. The substrate 6 is a shallow (3 mm deep) container made of plastic. MMA7 mixed with aggregate is used as the resin. In this state, the resin 7 has not been cured yet. FIG. 2B shows a state in which the restoration sheet 4 is placed upward in this state. Next, the adhesive sheet 3 is placed and pressed from above so that air does not enter. In this example, release paper 5 has already been affixed.

After the resin is cured in the state shown in FIG. This is the state shown in FIG. 1 and is completed. For curing, the method of raising the temperature is simple. It may be about 70-80 ° C. In this example, it is assumed that it is smooth and has no steps like a normal natural stone sliced product.

FIG. 3 is a schematic side view showing a continuous manufacturing method. The resin 7 is applied to one of the long (for example, 50 m) belt conveyors 8 so as to have a predetermined height and a predetermined width. The width may be defined by walls provided on both sides of the conveyor, and the thickness may be adjusted by the amount applied, or may be passed through a thickness defining portion such as a tunnel after application. Then, the restoration sheet 4 is placed from above while the resin 7 is not yet cured, and then the adhesive sheet 3 is placed and pressed from above by a pressing roll or the like. In this state, it is slowly transferred and cured by a conveyor.

After curing, the sheet is removed from the conveyor (automatically possible) and cut into a predetermined size by a cutter 10 at a cutting table 9. Once cut, heat without curing (around 100 ° C)
To make it flexible, and it can be rolled up and stored as it is. Such materials are reheated when used or cut. Of course, this is due to the nature of the resin, and in the case of such a difficult resin, cutting is usually performed after curing. Further, if the sheet is not cured on the belt conveyor depending on the conditions, the sheet can be cut into an appropriate size as it is, transferred to a fixed shelf, cured and cured, and then cut to a predetermined size. .

[0033]

The member for civil engineering and construction according to the present invention has the following significant advantages. Since the restoration sheet is provided between the resin layer and the adhesive sheet, the resin layer is kept in a predetermined shape even if the lower surface of the adhesive sheet has irregularities. The restoring sheet is not only adhered but also integrated with the curing of the resin layer, so that the restoring force is large. Since the restoration sheet exists, the resin layer can be thinned.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of a member for civil engineering and construction according to the present invention.

FIG. 2 is a cross-sectional view showing a manufacturing process of one example of the member for civil engineering construction of the present invention.

FIG. 3 is a side view showing another example of the manufacturing process of the member for civil engineering construction of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Civil engineering building member 2 Resin layer 3 Adhesive sheet 4 Restoration sheet 5 Release paper 6 Substrate 7 Resin 8 Belt conveyor 9 Cutting table 10 Cutter

Claims (2)

[Claims] 1. A reactive curable resin is applied on a substrate, and when the resin is uncured, a restoration sheet is provided from above the resin.
A member for civil engineering and construction, further comprising a pressure-sensitive adhesive sheet placed thereon, cured by reaction, and then removed from the substrate. 2. A pressure-sensitive adhesive sheet, a restoring sheet is placed thereon, and then a reactive curable resin is applied thereon, and when the resin is uncured, a substrate is placed from above and the resin is placed on the adhesive sheet. A member for civil engineering construction wherein the substrate is removed after the reaction and curing.