JP4684676B2 - Line powder, drawing method using the same, and line erasing method - Google Patents

Description

  The present invention relates to a line powder used for drawing a sign or drawing a line for competition at a school playground, a sports ground, a golf course or a plaza, and a line drawing using the line powder. The present invention relates to a method and a line erasing method.

Conventionally, a white powder made of slaked lime or calcium carbonate is used for this type of line powder. As a method of drawing, generally, the white powder of slaked lime or calcium carbonate is put into a drawing device (line marker) to draw a predetermined mark or line.
Japanese Patent Publication No. 7-10971

  However, the above-described conventional products sometimes absorb moisture and solidify during rainfall, making it difficult to erase.

  On the other hand, in a ground that employs natural turf or long pile artificial turf, the method of drawing a sign and the method of drawing a white line differ depending on the type of competition and various events. In other words, the ground is often provided with lines and signs suitable for the purpose, and especially in the artificial grass ground, the lines and signs are white line artificial grass (partially the pile itself is white). (Artificial grass) Therefore, when the ground is used for purposes other than the intended purpose, it is necessary to tentatively draw lines other than the original competition lines and signs. Moreover, it was necessary to erase this line as soon as the competition or event ended, and to restore it or redraw the line for the next competition or event.

  In such a case, since the conventional product solidifies when it comes into contact with water, it cannot be easily erased by spraying water, and there is a problem that the quick response cannot be satisfied. For this reason, there is a need for a line powder that, once drawn, produces a clear white line and, on the contrary, can be erased without a trace after use.

The present inventor has solved the problems of the conventional products, and at the same time, has made various studies in order to satisfy the above-mentioned demands in recent years.
In other words, the present invention adopts diatomaceous earth that has whiteness close to those of conventional products and does not solidify in place of conventional slaked lime and calcium carbonate, and adds an appropriate amount of sodium carbonate in order to further increase the degree of whiteness. A line powder that can achieve almost the intended purpose was obtained, and is proposed here.

  Therefore, the object of the present invention is to use a conventional line marker without requiring a special device or machine for drawing, and the line can be drawn clearly and clearly, and can be easily erased without any trace. An object of the present invention is to provide a powder, a drawing method using the powder, and a line erasing method.

In order to solve the above technical problem, the line powder according to the present invention, first, firing Ri name from diatomite and calcined mixed sodium carbonate with 1-5% by weight at the time, the apparent specific gravity 0.25 The gist is that the powder is a water-dispersed powder having a particle size of 0.35 and a particle size of 15 to 50 μm .

With the above configuration, by sodium carbonate to increase the white degree firing the entrained diatomite with 1-5% by weight, the resulting powder Ri a higher more white degree, in powder form, Does not solidify even when associated with water.

  The calcination temperature of diatomaceous earth is in the range of 600 ° C to 1200 ° C, preferably in the range of 1000 ° C to 1200 ° C.

  If the temperature is lower than 600 ° C, the desired whiteness level cannot be obtained. On the other hand, if the temperature is higher than 1200 ° C., the porous diatomaceous earth melts and collapses, and part of the diatomaceous earth is transformed into crystalline silica, which is not desirable. Desirable whiteness and a desirable range in which the modification of crystalline silica can be suppressed are 800 ° C. to 1200 ° C., and powder obtained as a flux fired diatomaceous earth is desirable.

Sodium carbonate (Na ₂ CO ₃ ) is added to further increase the whiteness of the diatomaceous earth and enlarge the particles. The added sodium carbonate is in the range of 1% to 5% by weight, desirably in the range of 2% to 4% by weight.

  If the amount added is less than 1% by weight, the effect of enhancing the white color will be diminished. On the other hand, if it is 5% by weight or more, the moisture tends to be absorbed too much, the powder tends to be solidified, and there is a possibility that the powder may melt, together with lack of economic efficiency. Absent. From the viewpoint of economic efficiency, it is desirable to set the preferred whiteness level and suppress the solidification of the powder, and the range of 2% weight ratio to 4% weight ratio is desirable. A desirable whiteness level was obtained.

  In the present invention, “line” is defined to mean general lane markings and all of various markers and signs drawn in each competition. Specific examples include foul lines, batter boxes, waiting circles in baseball fields, side lines, half lines, yard lines, goal lines and off-line decorative signs in football and rugby stadiums, and soccer In the center line, touch line, halfway line, goal area, penalty arc, athletic field, etc., the course line, start line, goal line, throwing circle, railroad crossing line, runway line, tennis court base line, center mark, Service lines, service side lines, double side lines, and the like are referred to as lane lines, signs, and markers. For convenience, these lines are simply referred to as lines including lane lines, signs, and markers. In addition, “drawing” means so-called drawing of division lines, and it is also called “drawing” including drawing a marker or a marker, and is defined as such.

Therefore, this invention has the following effects.
Unlike conventional products, the line powder according to the present invention basically employs diatomaceous earth, which is a material that does not solidify even when there is moisture, and adds sodium carbonate that increases the degree of whiteness thereto. Therefore, the obtained powder can be easily drawn by using a conventional line marker. In addition, since it does not solidify, the lines that are no longer needed can be washed away simply by spraying water and easily erased. Furthermore, the whiteness is excellent and the specific gravity (apparent specific gravity) is small. The apparent specific gravity of the conventional calcium carbonate line powder is about 1.50 to 1.80, while that of the line powder according to the present invention is 0.25 to 0.35. That is, the line powder according to the present invention is much lighter than the conventional product, and is much more workable.

In the above configuration, the line powder according to the present invention is preferably mixed with a pigment as described in claim 2.
This is because, in addition to white, a desired colored powder such as yellow, green or even an un-toker color can be obtained. That is, for example, in addition to the white line, there is a demand for a yellow or green line, for example, but such a case can be dealt with quickly and easily. Or, in the case of artificial turf for white lines, by drawing yellow, green or untukered powder from the top of this turf, the colored line drawing and the original line can be integrated with the base ground color. This is because the line can be erased.

  As a material used for coloring, for example, pigments having various shades are employed. The pigment may be organic or inorganic. In particular, considering safety and economy, an iron oxide pigment is desirable when yellow, and trivalent inorganic chromium oxide is desirably employed as green. In addition, for example, metal oxides such as titanium oxide, zinc oxide and iron oxide, other inorganic pigments such as molybdenum red, cobalt blue, manganese violet, bitumen and ultramarine, phthalocyanine pigments such as phthalocyanine blue and phthalocyanine green, monoazo Azo pigments such as red, permanent yellow and disazo yellow, perylene pigments such as perylene red, quinacridone pigments such as quinacridone red, isoindolinone pigments, methine, azomethine pigments, benzimidazolone pigments, dioxazines Various pigments such as organic pigments such as pigments, metal powder pigments such as aluminum, nickel and stainless steel, special pigments such as pearl pigments, fluorescent pigments and phosphorescent pigments are employed. Also, it is preferable to use pigments that have cleared environmental hormones, PRTR, amine regulations, and the like. For example, neocolor (trade name: manufactured by Matsui Dye Chemical Co., Ltd.) yellow / orange / green pigments are suitable. These may be used alone or in combination of two or more as required.

  The line powder of the present invention is difficult to solidify even when it encounters water, can be easily drawn with a line marker, and has a property that a desired color can be easily obtained by mixing a colorant such as a pigment. ing. By utilizing this property, as described in claim 3, a liquid having adhesiveness is sprayed in advance on the ground, and a line is drawn thereon by the line powder according to claim 1 or claim 2. The line drawing method characterized by this is a preferred method of use.

  A liquid with adhesive properties such as water or adhesive is sprayed in advance by dew, etc., and the ground and turf stalks and leaves are moistened or sticky, and then a predetermined line is drawn with a line marker. Since the ground and turf stems and leaves are moistened by applying an adhesive liquid in advance, and these are imparted with adhesion, the line powder is easily and accurately attached to the ground and turf stems and leaves.

  In addition, a preferred method of using the line powder of the present invention is that, as described in claim 4, a liquid having adhesiveness is sprayed on a previously drawn line, and a ground ground is placed on the line. 3. A method for erasing a line, characterized in that the colored powder according to claim 2 is drawn in substantially the same color.

  An adhesive liquid such as water or adhesive is sprayed in advance along an existing white or green line, for example. Next, powder of the same color as the ground is sprayed using a line marker or the like in the manner of drawing from above the existing line. The sprayed powder is similar to the ground color, for example, Untuker or green (in the case of natural or artificial turf), or even earth, so other existing lines are colored to the ground color. Is done. In this case as well, the ground powder and turf stalks and leaves are moistened by spraying an adhesive liquid in advance, and they are given adhesion, so the line powder adheres to the ground and turf stalks and leaves in a simple and accurate manner. Further enhance its effectiveness.

  In recent years, the ground color is mostly Untuker or green, but it goes without saying that in any case, the various pigments described above are employed.

  The “ground color” in the present invention does not necessarily mean the color of the ground. For example, if the ground is a natural turf ground, the ground color is green (turf color), the ground is earthy, and if the ground is an un-to-car specification, it is a brick color. Therefore, the background color in the present invention means such various colors.

  In addition, as understood from the above description, in the present invention, the “ground” refers to artificial grass provided on the ground in addition to the so-called ground including artificial ground such as untucker, asphalt, and concrete. Or natural grass is included. However, depending on the method of use, the target to which the line powder is sprayed is the ground or the stalks and leaves of the turf. Therefore, the described method is expressed as “ground or turf” for convenience.

  As described above, the line drawing method described in claim 3 is a simple and accurate method for drawing powder by using a ground or turf stalk and leaves, for example, by using water or an adhesive to improve the adhesion. Can be attached to the ground or turf stalks and leaves, so the line powder is less likely to fall on the ground, especially on turf stalks and leaves, and the amount used can be greatly reduced. And even if the amount used is small, since it is excellent in adhesion, a clearer line can be drawn with respect to the ground and the foliage of turf.

  According to a fourth aspect of the present invention, there is provided a line erasing method in which a line of the same color as the color of the ground other than the line or the artificial grass for the line is placed on the line previously drawn to the ground or the artificial grass for the line. By drawing with powder, the existing lines can be easily erased.

In addition, water or an adhesive solution is employ | adopted for the above-mentioned adhesive liquid.
This is because the line powder adheres better to the ground and turf foliage by spraying the adhesive solution in advance, and it is preferable because it can draw a clear line even if the amount of line powder used is small. It is. In particular, if a sticky solution is used, the line powder can be better adhered to the ground and turf, that is, the existing line of the ground and the stalks and leaves of the turf, and the amount of line powder used can be further reduced, At least, a clear line can be drawn, which is preferable.

  And the line powder of this invention is provided with the characteristic property which does not solidify as demonstrated previously. Therefore, in any of the above methods of use, the drawing and erasing operations are simple, can be performed efficiently and in a short time, and the value of industrial use is great.

The purpose of drawing diatomaceous earth is to use conventional line markers, draw lines clearly and clearly, and easily erase without traces. The tint was achieved using sodium carbonate to bring it closer to white.
Hereinafter, the line powder according to the present invention and the utilization method thereof will be described.

  First, in order to obtain a line powder, 3% of sodium carbonate (soda ash) is mixed in a powdery diatomaceous earth by weight. Next, this was fired at 1200 ° C. to obtain a flux fired diatomaceous earth. The obtained flux-fired diatomaceous earth had a whiteness level much higher than before firing, and a white powder made of conventional slaked lime or calcium carbonate and a line powder comparable to that of white powder was obtained.

  This white line powder was sprayed directly on the ground and sprinkled with dew from above, but no solidification was observed. Furthermore, when watering continuously, it disperse | distributed with water, osmose | permeated in the soil, and disappeared without a trace.

  Further, as a result of various experiments, it was found that the calcination temperature of diatomaceous earth was good in the range of 600 ° C to 1200 ° C, preferably in the range of 1000 ° C to 1200 ° C.

  When the temperature was lower than 600 ° C., a desired whiteness degree could not be obtained. On the other hand, when the temperature is higher than 1200 ° C., the porous diatomaceous earth is melted and crushed, and part of the diatomaceous earth is transformed into crystalline silica. It has been found that the desired whiteness and the desired range in which the modification of the crystalline silica can be suppressed is 800 ° C. to 1200 ° C., and the powder obtained at 1200 ° C. is most desirable.

Next, in order to examine the degree of whiteness, several tests were performed with various adjustments of the amount of sodium carbonate added. The test was judged visually.
As a result, when the added amount was less than 1% by weight, the original reddish powder of diatomaceous earth was obtained, and the effect of increasing the white color was not obtained. On the other hand, if the weight ratio exceeds 5%, moisture tends to be absorbed too much, the powder tends to be solidified, and may be melted, resulting in poor economic efficiency. That is, adding more than 5% is not desirable because the whiteness is not further improved and becomes useless. From the viewpoint of economic efficiency, it is desirable to set the preferred whiteness level and suppress the solidification of the powder, and the range of 2% weight ratio to 4% weight ratio is desirable. A desirable whiteness level was obtained.

  Moreover, the preferable particle size of powder was 15-50 micrometers, More preferably, it was 25-30 micrometers. If the particle size is too small, the scattering property is too high and it is difficult to handle as a line powder. On the other hand, if the particle size is too large, the adhesion and water dispersibility will decrease, and it will not be possible to draw a clear line, and it will take a lot of trouble to redraw It becomes. From such experimental results, it was judged that the above particle size was desirable.

Next, a colored powder obtained by adding a pigment to the white line powder obtained by the above method will be described.
Inorganic chromium oxide was appropriately added to the white line powder obtained by the above method, and the mixture was stirred using a stirrer so that the entire color became uniform, thereby obtaining a green colored powder.

  The obtained green colored powder was filled into a line marker in the same manner as described above, and was drawn along a 50 m white line. In this case, it is important to moisten the line by lightly sprinkling water on the existing white line artificial turf (long pile artificial turf).

  As a result, the white line from the existing artificial grass for white lines has been brilliantly changed to the same green color as the surrounding artificial grass.

Next, a drawing method using the white line powder obtained as described above will be described.
The white line powder obtained as described above was filled into a line marker and drawn on a long pile artificial grass. Before drawing the line, sprinkle lightly on the planned line and moisten the pile (the foliage of the lawn). After drawing a line of 50 m, the amount of each powder used in the case of drawing using conventional slaked lime and calcium carbonate was comparatively measured.

  As a result, the line powder according to the present invention finished drawing the line at a use amount of about 70% as compared with the conventional product. The degree of sharpness of the drawn lines was equal to or slightly clearer than that of the conventional product, though visually.

Next, a method for erasing lines using the colored powder obtained in Example 2 will be described.
The green line powder obtained in Example 2 was filled into a line marker and drawn on a white line drawn on a long pile artificial grass ground. Before drawing the line, sprinkle lightly with dew on the planned line and moisten the pile (the foliage of the lawn). When the 50 m line was drawn and the lines were drawn using conventional slaked lime and calcium carbonate, the amount of each powder used was also comparatively measured.

  As a result, the colored line powder according to the present invention finished drawing the line at a use amount of about 70% compared with the conventional product. The drawn line was in one with the green of the ground, and the white line was erased brilliantly.

  Next, water was sprayed to each line carried out in Examples 3 and 4 above, and the powder was washed away. In either case, the powder was washed with water, penetrated into the ground and erased brilliantly. I found out that

In Examples 3 and 4 described above, it was observed that the sprayed water flowed down and the foliage of the pile was not sufficiently wet. This is presumably because the resin pile (mainly polyethylene pile) in the long pile artificial turf used in the experimental example has water repellency.
Therefore, in such a case, by using an adhesive solution, the solution can easily stop even at the tip of the pile, and the adhesion of the line powder can be further enhanced.
Examples of the adhesive solution employed instead of water include a 2 to 5% aqueous solution of PVA. In addition to this PVA, any adhesive solution can be used as long as it does not deviate from the intended purpose of the present invention. For example, various pastes, CMC, polyethylene oxide, etc. are used. it can. However, it goes without saying that it is desirable to be water-soluble for line erasing.

  As described above, the line powder according to the present invention can be drawn using an existing line marker in the same manner as conventional calcium carbonate and slaked lime. However, since it has excellent adhesion, a clear line can be obtained in a much smaller amount than conventional calcium carbonate or slaked lime. The lines that are no longer needed can be sprayed with water to disperse in water without solidification, flow down to the ground or soil, or penetrate and easily erase without traces. Furthermore, the existing line can be deleted by drawing on the existing line.

  In addition, the line powder according to the present invention is excellent in that the whiteness is excellent and the specific gravity (apparent specific gravity) is small. The apparent specific gravity of the conventional calcium carbonate line powder is about 1.50 to 1.80, while that of the line powder according to the present invention is 0.25 to 0.35. That is, it was found that the line powder according to the present invention is much lighter than the conventional product and is much more workable.

  The line powder of the present invention and the method for using the line powder are described as examples when applied to artificial turf for long piles, but the object to be applied is, for example, short pile artificial turf, natural turf, or even planting turf. Needless to say, it may be a general ground.

Claims (4)

Ri Na from diatomite and calcined mixed sodium carbonate with 1-5% weight during the firing, the apparent specific gravity of powdery watering distributed particle size of 15~50μm at 0.25-0.35 line Powder . The line powder according to claim 1, which is colored by mixing a pigment. 3. A line drawing method comprising: spraying a liquid having adhesive properties on a ground in advance, and drawing a line with the line powder according to claim 1 or 2. A liquid having adhesiveness is sprayed on a previously drawn line, and the colored powder according to claim 2 is drawn on the line, which is substantially the same as the color of the ground. How to erase lines.