JPS6320074A - Surface finishing method for interlocking block - Google Patents

Abstract

PURPOSE:To form a coating layer which is bright in colors, is thick-walled and is robust, and has high wear resistance and large slipping resistance value by spraying gaseous flow contg. a high-polymer powder paint and inorg. granular material melted by heating to the surface of an interlocking block. CONSTITUTION:The gaseous flow contg. the high-polymer powder paint (e.g., thermosetting type epoxy paint) and inorg. granular material (e.g., quartz particles having 0.1-3mm grain size) melted by heating is sprayed to the surface of the interlocking block 7 to form the coating layer 8 of 0.2-5mm thickness contg. the high-polymer powder paint and inorg. granular material to the surface of the block 7. The mixing ratio of the high-polymer powder paint and the inorg. granular material is adequately specified to 10-100pts.wt. inorg. granular material per 100pts.wt. high-polymer powder paint. As a result, the coating layer which is bright in colors, is thick-walled and is robust and has the high wear resistance and large sliding resistance value is formed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a surface finishing method for interlocking blocks, and in particular, interlocking blocks made of polymer resin and inorganic granules, which are brightly colored, thick, robust, and wear-resistant. The present invention relates to a method for finishing the surface of an interlocking block, in which a coating layer with excellent properties and high slip resistance is formed on the surface.

[Prior Art] Interlocking blocks are widely used for paving parks, plazas, parking lots, roads, etc., and are usually colored to give them an aesthetic appearance. Conventionally, this coloring method has generally been carried out by mixing pigments when mixing concrete.

However, interlocking blocks colored by mixing pigments into concrete inevitably fade due to efflorescence, which is the fate of cement products, and it is difficult to maintain the bright colors at the time of manufacture for a long period of time. It is extremely difficult.

Incidentally, it is possible to apply a colored coating film to the surface of the interlocking block by brushing, spraying, or other methods using ordinary paint. However, the coating film produced by such a method has extremely poor performance and disappears due to abrasion or peeling within a few days after use, so it is not practical.

Kiyoto Kide discovered that an extremely excellent coating layer could be formed by spraying a molten polymer powder coating onto the surface of a hardened cement product in order to impart good color to the surface of cement products. A patent application was filed in 1988 (Japanese Unexamined Patent Publication No. 61-21988, hereinafter referred to as the "prior application").

By employing the method of the prior application, it is possible to produce interlocking blocks that have vivid colors with little fading.

[Problems to be Solved by the Invention] However, depending on the intended use of the interlocking block, its surface is generally required to have wear resistance and high slip resistance. That is, the wear and tear caused by driving cars and people walking, especially in the winter months in northern countries, the wear and tear caused by driving cars equipped with spiked tires is severe, and for this reason,
The surface of the interlocking block requires a high degree of wear resistance. Furthermore, when the surface gets wet with water, such as during rainy weather, the slip resistance decreases, making it difficult for people to walk or cars to drive safely, so the surface should have a high slip resistance value. Bigness is also required.

In response to these required characteristics of interlocking blocks, the coating layer made of the molten polymer powder coating of the previous application cannot be said to have sufficient abrasion resistance and slip resistance. The reality is that this is what is required.

[Means for Solving the Problems] The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide a surface that does not easily fade in color and has abrasion resistance and slip resistance. It is an object of the present invention to provide a method for finishing the surface of an interlocking block, which forms a thick coating layer on the surface of the block that significantly improves the surface finish.

To achieve this objective, the interlocking block surface finishing method of the present invention involves simultaneously conveying not only the molten polymeric powder coating but also the inorganic particulates by a gas stream and blowing it onto the surface of the interlocking block. By applying this, a coating layer containing a polymer powder coating and inorganic particles is formed on the surface of the interlocking block.

The present invention will be explained in detail below.

In the present invention, the polymer powder coating used is:
There are no particular restrictions, and various polymer powder coatings can be used, but in particular, ethylene vinyl acetate, polyethylene, polybutene, and thermosetting epoxy coatings can be used to improve acid resistance, chemical resistance, and abrasion resistance. This is extremely advantageous since it allows formation of an excellent coating layer.

Inorganic granules are required to be strong in order to impart wear resistance to the coating layer, and it is desirable that the particles fall within a certain particle size range. There are no particular restrictions on the material, etc. As the inorganic particulate matter, glass beads, quartz particles, sand, crushed blast furnace slag, metal particles, etc. can be used.

If the particle size of these particles is too small, the effect of improving the sliding resistance value will be low, and if the particle size is too large, they will peel off from the surface coating layer, resulting in poor wear resistance. The particle size of inorganic granules is
A thickness in the range of 0.1 to 3 mm is suitable.

The mixing ratio of the polymer powder coating and the inorganic particulate matter is determined by the wear resistance of the N layer formed when the ratio of the inorganic particulate matter is small;
Both the sliding resistance value becomes small, and if the proportion of inorganic particulates is large, surface peeling occurs. Therefore, the mixing ratio is 1 part by weight of the inorganic particulate material to 100 parts by weight of the polymer powder coating.
The amount is preferably 0 to 100 parts by weight.

In addition, in carrying out the present invention, the polymer powder coating and the inorganic particulate matter may be mixed in advance and supplied from a supply device.
It may also be supplied by a separate device.

In the interlocking block surface finishing method of the present invention, the polymer powder coating and the inorganic granules are heated while being conveyed by a gas flow to bring the polymer powder coating into a molten state. Then, a gas flow containing the molten polymer powder coating and inorganic granules is sprayed onto the surface of the interlocking block, and the polymer powder coating containing the inorganic granules collides with the surface to form a coating layer. do.

Such a method of the present invention includes a gas flow generating means for conveying the polymer powder coating and inorganic granules, a heating means for melting the polymer powder coating conveyed by the gas flow, and a heating means for the inorganic granules. This can be carried out using a device having a A device that heats inorganic granules while melting them.

■ A device that uses plasma instead of combustion gas in the device described in ■.

etc. can be used.

The method of the present invention can also be carried out using an apparatus in which the polymer powder coating and inorganic particulates are immersed in a high-temperature gas stream such as combustion gas while being dispersed therein.

More specifically, the method of the invention can be carried out using conventional thermal spray equipment. As for the thermal spraying equipment, various gas type and plasma type ring types can be adopted.

FIG. 1 is a cross-sectional view illustrating a state in which surface finishing according to the present invention is performed using a gas-type thermal spraying apparatus.

In FIG. 1, reference numeral 1 denotes a thermal spray gun nozzle of a thermal spraying device, which has a triple-pipe structure having a supply hole 2 for polymer powder coating and inorganic particulate matter, a conveying air blow-off hole 3, and a combustion gas supply hole 4.

The polymer powder coating 5 and inorganic granules 9 ejected from the injection ports of the polymer powder coating and inorganic granule supply holes 2 are conveyed by air from the conveying air blow-off holes 3, and are conveyed through the combustion gas supply holes. The polymer fluid paint 5 is heated by the combustion flame 6 of the combustion gas from 4 and becomes molten, collides with the surface of the interlocking block 7, and adheres to the surface to form a polymer powder paint with inorganic particulates dispersed therein. coating layer 8
form.

The thickness of the N layer 8 to be formed can be easily adjusted by changing the thermal spraying time, and according to the method of the present invention, a thickness of 0.2 to 5 m can be formed by one thermal spraying process.
A coating layer consisting of a polymer powder coating material and an inorganic particulate material having a thickness of m can be arbitrarily formed.

In addition, when a gas flow containing a thermally fused polymer powder coating and inorganic particulates is sprayed onto a hardened cement body according to the method of the present invention, the surface temperature of the interlocking block increases due to the thermal energy possessed by the gas flow. The amount of moisture in the block evaporates increases, and bubbles may appear on the surface of the coating layer formed on the surface of the interlocking block. For this reason, it is preferable that the surface of the interlocking block is sufficiently dry.

By heating the surface of the interlocking block to a temperature similar to that of the adhesive material before thermal spraying, it is possible to prevent the formation of bubbles in the coating layer, and to ensure that the surface of the interlocking block dries well. As a result, the adhesion of the cured polymer of the coating layer is improved, and a stronger coating layer can be obtained.

In forming the coating layer according to the method of the present invention, before the coating layer of the polymer powder paint and the inorganic granules sprayed on the surface of the interlocking block is fixed, the spraying further coats the surface with the inorganic granules. It is also possible to increase the proportion of inorganic particles on the surface by spraying a gas stream containing.

The coating layer of the polymer powder coating and the inorganic particulate material is prepared by spraying a gas flow containing the heated and melted polymer powder coating onto the surface of the interlocking block, and before it solidifies.
This spraying can also be done by spraying a gas stream containing inorganic particles onto the surface and fixing it.
This method has low practicality due to the adhesion of inorganic particles.

[Function] In the present invention, the polymer powder coating is heated and molten, and is carried along with the inorganic particulates by an air current, and is sprayed onto the surface of the interlocking block and fixed thereon. Therefore, a thick coating layer of a polymer powder coating containing inorganic particulates can be formed in a short time, and there is no need to use a solvent.

In addition, the resulting coating layer has a clear color with almost no fading, and due to the presence of the inorganic particulate matter, the coating layer has excellent abrasion resistance and high slip resistance.

[Examples] The present invention will be described below in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples unless the gist thereof is exceeded.

Examples 1 to 4 Polymer powder was applied to the surface of the interlocking block by using a gas spraying device (manufactured by 5hort, UK) shown in Figure 1 and varying the mixing ratio of inorganic particulates as shown in Table 1. A coating layer consisting of body paint and inorganic granules was formed.

The specific conditions are as follows.

Type of polymer powder coating: Ethylene vinyl acetate particle size, 0.08~0.2mm Type of inorganic granule: Glass beads particle size: 0.1~0.84mm Gas spraying equipment (manufactured by Shori'1!L in the UK) )
Air blowout amount: 12QIL/min Combustion gas type,
Distance between LP gas gun and block: Approximately 20 cm Thickness of the formed coating layer: Approximately 1 mm Area: Approximately 250 crn' The surface of the formed coating layer exhibits a vivid color tone, and this color tone does not easily fade and is extremely durable. It was recognized that In addition, the surface was smooth, had elasticity, and had a good feel.

The formed coating layer was subjected to a labeling test (Alphalt Pavement Guidelines) used to evaluate the abrasion resistance of asphalt to examine the amount of wear. It is expressed as the ratio of the amount of wear when In addition, the slip resistance test (ASTM E
303) to examine the slip resistance value.

The results are shown in Table 1.

Table 1 Comparative Example 1 A coating layer was formed in the same manner as in Example 1 except that no inorganic granules were used, and its wear ratio and sliding resistance were determined, and the results are also listed in Table 1.

Comparative Example 2 For the interlocking block that does not form a coating layer, its wear ratio and slip resistance value are determined, and the results are used as the first
Also listed in the table.

From Table 1, it is clear that by forming a coating layer made of ethylene vinyl acetate and glass beads according to the present invention, the abrasion resistance is significantly improved and the sliding resistance value is also increased. Therefore, for this effect of improving wear resistance, it is preferable that the proportion of inorganic particulates be large to some extent, and the sliding resistance value increases as the proportion of inorganic particulates increases.

[Effects of the Invention] As detailed above, according to the surface finishing method for an interlocking block of the present invention, it is possible to obtain an interlocking block having a coating layer that is excellent in wear resistance and has a high sliding resistance value. Moreover, this coating layer has a clear color and does not fade due to efflorescence or the like.

It also has excellent chemical resistance and oxidation resistance.

Therefore, according to the method of the present invention, there is less wear and tear caused by driving a car or walking by a person, and the slip resistance value is high, so the method is highly safe, beautiful, and durable when driving a car or walking by a person. An interlocking block is provided.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view illustrating a method of forming a coating layer of a polymer powder coating and inorganic granules on an interlocking block according to the method of the present invention. 1... Thermal spray gun nozzle, 2... Polymer powder coating and inorganic particulate material feeding hole, 3...
・・Transport air blow-off hole, 4・・Combustion gas supply hole, 5・
...Polymer powder coating, 6...Combustion flame, 7...
Interlocking block, 8... coating layer,
9...Inorganic particulate matter.

Claims (4)

[Claims] (1) A gas flow containing heated and melted polymer powder paint and inorganic particulate material is sprayed onto the surface of the interlocking block to form a coating layer containing the polymer powder paint and inorganic particulate material on the surface of the interlocking block. A surface finishing method for interlocking blocks characterized by forming. (2) The method for finishing the surface of an interlocking block according to claim 1, which comprises forming a coating layer with a thickness of 0.2 to 5 mm. (3) The method for surface finishing an interlocking block according to claim 1 or 2, wherein the inorganic particulates have a particle size of 0.1 to 3 mm. (4) The interface according to any one of claims 1 to 3, characterized in that the ratio of the inorganic particulates to 100 parts by weight of the polymer powder coating is 10 to 100 parts by weight. Surface finishing method for rocking blocks.