JPH0710660A - Production of sheet having decorative aggregate loaded thereon - Google Patents

Abstract

PURPOSE:To simplify and facilitate the exposure and finish of a concrete aggregate by using a resultant sheet having a decorative aggregate loaded thereon by forming a binder layer on a support such as a plastic sheet, embedding a part of the decorative aggregate on the layer and fixing the decorative aggregate. CONSTITUTION:A decorative aggregate 3 is loaded onto a binder (a hot-melt- based tacky agent) 2 set on a sheetlike support (plastic sheet) 1 and the aggregate 3 is pressed by its own weight or under pressure and partially embedded in the binder layer 2. This binder 2 is then melted to fluidize at a lower temperature than the softening point of the support. The aggregate 3 is heated at a lower temperature than the softening point of the support 1 and a higher temperature than the flow temperature of the binder 2. A mortar is subsequently then placed on the sheet having the decorative aggregate loaded thereon and cured and the tacky sheet is peeled from the aggregate 3 to afford the Pc plate, excellent in appearance and having the exposed aggregate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to finishing of aggregate for landscape decorative concrete, and more particularly to a method for manufacturing a sheet for mounting decorative aggregate which can be simply and efficiently carried out.

[0002]

2. Description of the Related Art A method called a washing-out method has been used as a generally known method for exposing aggregate of concrete. This method is, for example, a method in which a mortar in which aggregate is kneaded is placed on a concrete base, and the surface mortar is washed out while the mortar is half-cured, or a part of the aggregate is exposed, or the aggregate is kneaded. A method of delaying the hardening of the surface of the mortar by using a hardening retarder, and when the inside of the mortar hardens, the uncured surface layer is washed away to expose a part of the aggregate.

[0003]

However, in the above washing method, since the mortar is washed away with a large amount of water, it is necessary to treat a large amount of an inorganic substance suspension containing heavy metals and the like, and expensive aggregates are required. As described above, there are problems in that a large amount of them must be used, and that it takes a long time and a high level of skill to perform decorative finishing of complicated patterns.

An object of the present invention is to solve the problems of the above-mentioned prior art and to provide a method for producing a decorative aggregate-carrying sheet suitable for use in exposed concrete aggregate that can be simply and efficiently carried out. To provide.

[0005]

The above-mentioned object is to provide a binder layer which melts and flows at a temperature lower than the softening point of the support on a sheet-like support, and the softening point of the support is set on the binder layer. And a decorative aggregate heated to a temperature higher than the flow temperature of the binder are placed, and the decorative aggregate is partially embedded in the binder layer by its own weight, and Alternatively, a binder layer that melts and flows at a temperature lower than the softening point of the support is provided on the sheet-shaped support, and the binder layer has a lower melting point than the softening point of the support and a flowing temperature of the binder on the binder layer. Placing a decorative aggregate heated to a higher temperature than the above, and a method for producing a decorative aggregate-carrying sheet, characterized in that the decorative aggregate is pressed and partially embedded in the binder layer, or The binder layer of melt flow at a temperature lower than the softening point of the support provided on the over preparative like support,
The decorative aggregate heated to a temperature lower than the softening point of the support and higher than the flow temperature of the binder is placed on the binder layer heated to the same temperature, and the decorative aggregate is partially contained in the binder layer by its own weight. This can be solved by using a method for manufacturing a decorative aggregate-mounted sheet characterized by being buried.

In this case, an effective effect can be obtained by burying and fixing a part of the aggregate by using a plastic sheet as the support and using an adhesive or the like having flexibility and bending resistance as the binder. it can.

Further, the binder such as an adhesive used here is required to have such a property that it can be fixed and held so that the aggregate does not fall off. Therefore, the adhesive strength to the aggregate at room temperature is sufficient. Must be big. In addition, it is necessary to have the property of easily removing the aggregate after fixing the aggregate with mortar, etc. Also, the adhesive force to the support such as plastics is sufficiently larger than the adhesive force to the aggregate. It is necessary. Furthermore, in addition to the above-mentioned performance, it must have physical properties such that aggregate can be easily embedded. A hot-melt pressure-sensitive adhesive that can be melted at a low temperature is most suitable as a binder having such performance.

On the binder of the aggregate mounting sheet obtained by coating the binder having the above-mentioned performance on the support, the aggregate heated above the melting temperature of the binder and below the softening point of the support. The above-mentioned problems can be solved by sprinkling and burying a part of each aggregate in the binder under its own weight or burying it under pressure. At this time, it is also effective to heat the aggregate-carrying sheet, if necessary.

[0009]

By fixing the aggregate on the sheet-like support with a binder, it is possible to obtain an aggregate-carrying sheet having a wide range of applicability for exposing exposed concrete aggregate for landscape decoration. In particular, by fixing the aggregate with a flexible binder, it is possible to obtain an aggregate sheet that can be applied to a curved surface. FIG. 1 is a schematic cross-sectional view showing the structure of an aggregate-carrying sheet manufactured by applying the method of the present invention, and shows that an aggregate 3 is fixed and mounted on a support 1 by a binder 2.

By molding mortar or concrete on the above-mentioned aggregate-carrying sheet and removing the support sheet together with the binder after the mortar or concrete has sufficiently hardened, a molded product with exposed aggregate can be obtained. In addition, it is also possible to easily finish the aggregate exposure by pouring mortar on the concrete foundation, immediately pressing the above-mentioned aggregate loading sheet to this, and after the mortar has hardened, similarly removing the support sheet. You can

As a method for producing an aggregate-carrying sheet, that is, a method of embedding a part of the aggregate in a binder and fixing it, (1) applying a fluid pre-adhesive on a support, A method in which the aggregate is placed in the pre-adhesive so that a part of it sinks, and then the pre-adhesive is cured, (2) A binder layer that can be deformed under pressure is provided on the support, and the aggregate is placed and then added. There is a method of embedding the aggregate in the adhesive by pressing, (3) applying a hot-melt binder on the support, placing the aggregate on it and then heating it to embed it in the binder, Furthermore, as a simple and more practical method, the present invention (4) heats the aggregate to a temperature at which the binder can melt and flow, and puts it on the binder, and melts the binder by the heat of the aggregate. There is a method of embedding. According to the method (4), the aggregate easily sinks in the binder layer by its own weight or light pressure. The degree of burial of the aggregate in the binder can be easily controlled by appropriately selecting the thickness of the binder layer.

As the above-mentioned support sheet, various materials such as plastic film, cloth, paper and non-woven fabric can be used. These sheets must be able to withstand the thermal shocks encountered in the manufacturing process for aggregate-loaded sheets. A plastic film such as polyethylene terephthalate is suitable in terms of strength and ease of handling.

The binder that fixes the aggregate must be flexible and have unique adhesive properties. Practically, it can withstand bending of about 90 degrees and has sufficient adhesive strength to aggregates, but it can be easily peeled off from aggregates after fixing them with mortar etc. Must. According to the experiment, the adhesive strength to the aggregate at room temperature, that is, the peeling strength is 3 N /
If it is more than cm, there is almost no risk of the aggregate falling off. on the other hand,
In order to drive the mortar or concrete into the mortar and harden it, and to peel off the sheet from the aggregate surface with a small force, it is desirable that the adhesive strength be 2 N / cm or less. Immediately after construction, the mortar is driven while holding a large amount of water, and some moisture is present at the interface between the adhesive and the mortar even when the sheet is peeled off. Also, the interface between the aggregate and the binder is gradually affected by moisture. Therefore, the use of a binder having a large adhesive force in a dry state and a decrease in contact with water makes it possible to satisfy the above-mentioned condition regarding the adhesive force. Furthermore, in order not to leave the binder on the surface of the aggregate when the sheet is peeled off, the cohesive force of the binder is 2
It should be sufficiently higher than N / cm, and the adhesive force to the support should be sufficiently higher than the adhesive force to aggregate and mortar. Further, since the binder is melted and fluidized by the heat of the heated aggregate to embed the aggregate, it is desirable that the binder be melted at a low temperature. As the binder having the above performance, a hot melt binder,
In particular, hot melt adhesives are suitable.

[0014]

EXAMPLES Hereinafter, the method for manufacturing the decorative aggregate-loaded sheet of the present invention will be specifically described with reference to Examples. In addition,
These examples represent part of the invention and the scope of the invention is not limited thereto.

[0015]

[Example 1] 300 mm x 300 m obtained by applying a styrene-butadiene-styrene-based adhesive to a thickness of 800 µm on a polyethylene terephthalate film having a thickness of 35 µm.
An adhesive sheet of m was prepared. Where, the above-mentioned pressure-sensitive adhesive 150 ℃
The melt viscosity at was 45 Pa · s. Next, on the pressure-sensitive adhesive layer of the above sheet, decorative pebbles having a size of 5 to 10 mm heated to 180 ° C., that is, aggregate, was sprinkled. As a result, the aggregate melted the adhesive and sunk into the adhesive layer under its own weight, whereby an aggregate-mounted sheet in which the aggregate was buried in the adhesive approximately half could be produced.

[0016]

[Example 2] 150 ° C on the adhesive layer of the adhesive sheet of Example 1
Sprinkle the heated pebbles with a size of 5 to 10 mm and then put a urethane rubber sheet with a thickness of 5 mm on it.
It was pressure-bonded with a roller having a diameter of 50 mm and a weight of 5 kg. As a result, the aggregate melted the adhesive and sank in the adhesive layer, whereby it was possible to produce an aggregate-mounted sheet in which about half of the aggregate was embedded in the adhesive layer.

[0017]

Example 3 A 300 mm × 300 mm pressure-sensitive adhesive sheet was prepared by coating the pressure-sensitive adhesive used in Example 1 on a polyethylene terephthalate film having a thickness of 35 μm to a thickness of 400 μm. Next, sprinkle a colored aggregate made of colored sand heated to 150 ° C. on the adhesive layer of the sheet, and place a urethane rubber sheet having a thickness of 5 mm on it, width 300 mm, diameter 50 mm, weight 5 kg.
It was possible to produce an aggregate-carrying sheet in which the colored aggregate was partially submerged in the pressure-sensitive adhesive layer by pressure bonding with the roller.

[0018]

Example 4 A large amount of a colored aggregate made of colored ceramics having a size of about 2 mm heated to 180 ° C. was sprinkled on the adhesive layer of the adhesive sheet used in Example 3 in a large amount, and a part of the aggregate was adhesive. Submerged in layers. After cooling this sheet, excess aggregate was removed, and an aggregate-loaded sheet could be obtained.

Mortar was driven into the aggregate-carrying sheets prepared in Examples 1 to 4 in a thickness of 2 cm, and after curing at 70 ° C. for 7 hours, the adhesive sheet was peeled off from the aggregate.
An aggregate exposed PC plate with an excellent appearance was obtained.

[0020]

As described above, by using the method for producing a decorative aggregate-loaded sheet as the method for producing the structure of the present invention, the problems of the prior art can be solved, and the method can be simply and efficiently performed. A viable method for producing a material suitable for use in exposed concrete aggregate exposure could be provided. By using this aggregate-loaded sheet, the washing method for exposing concrete aggregate, which has required a huge amount of time and labor in the past and complicated wastewater treatment, is no longer necessary, and the landscape decoration method is dramatically easier. I was able to train it.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing the structure of an aggregate-carrying sheet obtained by applying the method of the present invention.

[Explanation of symbols]

 1 ... Support, 2 ... Binder, 3 ... Aggregate.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masato Koyama, 3819 Noborito, Tama-ku, Kawasaki City, Kanagawa Prefecture, Sliontech Co., Ltd. (72) Inventor, Shigeru Inoue, 3819, Noborito, Tama-ku, Kawasaki, Kanagawa Prefecture (72), Sliontech Co., Ltd. Inventor Eisho Kobayashi 3819 Noborito, Tama-ku, Kawasaki City, Kanagawa Prefecture Sliontech Co., Ltd. (72) Inventor Hiroyuki Ogawa 1-4-3 Kotobukicho, Fuchu-shi, Tokyo Celtec Co., Ltd. (72) Yutaka Tamura, Tokyo Fuchu 1-4-3 Kotobuki-cho, Celtec Co., Ltd.

Claims (4)

[Claims] 1. A binder layer, which melts and flows at a temperature lower than the softening point of the support, is provided on a sheet-shaped support, and the binder layer has a softening point lower than the softening point of the support and a flow temperature of the binder on the binder layer. A method for producing a decorative aggregate-carrying sheet, characterized in that a decorative aggregate heated to a higher temperature is placed and the decorative aggregate is partially embedded in the binder layer by its own weight. 2. A sheet-like support is provided with a binder layer which melts and flows at a temperature lower than the softening point of the support, and the binder layer has a softening point lower than the softening point of the support and a flow temperature of the binder. A method for producing a decorative aggregate-carrying sheet, comprising placing a decorative aggregate heated to a higher temperature than the above and pressurizing the decorative aggregate to partially bury it in the binder layer. 3. A sheet-like support is provided with a binder layer which melts and flows at a temperature lower than the softening point of the support, and the temperature is lower than the softening point of the support and higher than the flowing temperature of the binder. A method for producing a sheet for mounting decorative aggregate, comprising the step of placing a heated decorative aggregate on the binder layer heated to the same temperature and partially immersing the decorative aggregate in the binder layer by its own weight. 4. The method for producing a decorative aggregate-carrying sheet according to claim 1, wherein the binder comprises a hot melt adhesive.