JPH0699888B2 - Method of forming road markings with good visibility in rainy or night time - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention provides quick drainage in rainy weather, and even if water collects on the road surface, the convex tops project above the water surface to retrace the light of the car headlights. The present invention relates to a method of forming a road marking that significantly improves visibility in a rainy place at night when it is reflected.

(Prior Art) As a conventional road marking forming method, a melting type using a petroleum resin or a rosin ester resin as a binder, or a solvent paint type paint containing an alkyd resin or an acrylic resin as a main component is used. In most cases, a construction machine or a mechanical type (paint marker car) is used to coat the road surface with a constant width and a constant film thickness, and in order to obtain visibility at night, glass beads are sprayed.

However, with this method, the surface is flat regardless of the size of the film thickness, and if a little water collects on the road surface due to rainfall, the road marking will be submerged and the car headlight light will be retroreflected at night. And there is almost no visibility.

In order to solve this problem and improve visibility in rainy weather or at night, various attempts have been made so far, for example, glass beads having a high refractive index are scattered on the coated surface.

Sprinkle large glass beads on the coated surface.

Install a metal or plastic molding with a reflector attached.

Install metal studs or bowl-shaped plastic moldings.

Add a convex pattern to the line at regular intervals.

Add a convex pattern to the line at regular intervals.

Make a groove in the line.

Etc.

However, some of them are adopted, but each has its drawbacks: is ineffective when submerged in water, is the risk of falling of a motorcycle, traffic obstacles, obstacles to snowplows,
The work efficiency such as removal or masking when repainting the line is reduced, is the retroreflective effect due to dirt, risk of peeling, low durability, low efficiency during repainting, is low durability, and dust is accumulated.

Etc., there are problems in each, and they have not become popular.

(Problems to be Solved by the Invention) An object of the present invention is to solve the above-mentioned drawbacks of the conventional road marking forming method, and to facilitate road construction without causing traffic obstacles (dangers). Of course, it is highly visible in rainy weather and at night. ・ It is necessary to establish a road marking construction method with long-term durability.

(Means for Solving the Problem) In the method of forming a road marking according to the present invention, the diameter of the road surface made of a solvent-free reaction-curable resin coating having a fast drying property and a high durability is 5 to 50.
It is characterized in that convex hemispheres having a diameter of mmφ and a height of 2 to 10 mm are applied and solidified at a constant width within a constant width and are then applied in a continuous line shape.

In addition, in the method of forming road markings, the diameter of the road surface made of solvent-free reaction-curable resin coating that is fast-drying and highly durable is 5 to 50
It is characterized in that convex hemispheres having a diameter of mmφ and a height of 2 to 10 mm are applied and solidified within a constant width at irregular intervals so as to be applied in a continuous line.

More specifically, in order to ensure daytime visibility, if necessary, pre-paint white or yellow paint (can be applied with a conventional paint marker), then based on the construction method of the present invention, A convex hemisphere is applied and solidified on the road surface or paint on the road surface, or after application, a reflecting material (glass beads or the like) is pressure-sprayed and fixed while not dried.

Specifically, paint spray system (paint tank, paint heating device, pump, spray gun, etc.), convex hemisphere construction system (paint tank, pump, two-liquid mixing device, coating device, etc.) and glass bead spraying Carry out with a marker car with the device set.

By the compressed air of the compressor loaded on the marker car,
After cleaning the road surface, spray paint as needed, immediately after that apply solventless reaction hardening type resin paint in dots by the convex hemisphere construction system, and press the glass beads immediately if necessary. Spray and stick to undried coating. Then, protect the paint with a safety cone until it hardens for about 20 minutes, open the traffic after solidification, and finish the construction.

In addition, the form of the road marking in the present invention is to obtain high visibility in rainy weather or at night, i. Rainwater should be drained promptly.

ii. Even if water collects on the road surface, project above the water surface.

iii. It emits high reflected brightness against light from any direction.

is necessary.

For this reason, as the marking form, it is best to construct the convex hemisphere independently on the road surface, and the shape of the convex hemisphere can be diameter: 5 to 50 mmφ, height: 2 to 10 mm But 2
Concerning the shape dimensions and arrangement of construction, including prevention of slip and fall of the wheeled vehicle, it is preferable that the diameter of the convex hemisphere is 5 to 20 mmφ and the height is 3 to 6 mm.
As in the first aspect of the present invention, if the tires of the vehicle are stepped on the rows in a row at regular intervals, rhythmic warning vibrations can be obtained. Further, if the arrangement is at random as in the second invention, almost no noise is generated,
It can be used as a "silent type". Further, in the first invention, the spacing between the rows and the lateral spacing of the hemisphere itself can be freely changed, but by appropriately changing the light, the light of the headlight can be efficiently received and a high retroreflective performance can be obtained. it can. The distance between rows is 3 to 10 cm, and the horizontal distance between the hemispheres is 2 to 10 cm. The horizontal arrangement of the hemispheres is 1
By displacing the center position for each row, the light from the headlight well hits a distant hemisphere having a small incident angle, and high reflected brightness can be obtained.

As a paint material, the existing petroleum resin melt-type paint (JIS K 5665 type 3) is the most advantageous from the viewpoints of drying speed and price, but this shape is maintained for a long time and glass beads are fixed and reflected. It is slightly inferior in durability for long-term performance. Therefore, as the coating material of the present invention, a two-component reactive acrylic resin is used as a material having a glass beads firmly fixed and a hemisphere shape maintained for a long period of time and having excellent durability, although the drying and curing speed is slightly slowed. , Epoxy resin, polyester resin, polyurethane resin and the like can be selected, and acrylic resin is most preferable in view of dry-curability, weather resistance, various physical properties and price.

As the properties of the paint, at the time of construction, in order to maintain the hemisphere, it is necessary to have a high degree of thixotropy, and in terms of compounding, in addition to the resin,
A color pigment, a filler, glass beads, a stabilizer and the like are appropriately mixed and prepared.

In order to ensure visibility of the daytime line, the primer to be painted in advance should be a paint for normal temperature or for heating (JIS
K 5665 Class 1 or Class 2 equivalent) can be used. Acrylic is suitable as the resin.

In addition, in order to obtain high durability of the primer portion (space between hemispheres), a two-component reactive resin coating material can be used.

Further, in the forming method of the present invention, the glass beads as a reflecting material mixed in the paint and scattered during the construction, if necessary, are used for ordinary road marking JIS R 3301 (refractive index 1.5, particle size 106 to 850 μm), but high refractive index glass beads having a refractive index of 1.9 or more can be used if higher reflection performance is desired. Particle size is 50-3000μ
m is possible, preferably 100-1500 μm.

These glass beads may be used alone or mixed to obtain intermediate performance.

Further, the construction machine used for carrying out the forming method of the present invention includes the one proposed by the present inventor in Japanese Patent Application No. 59-282079.

(Example) Hereinafter, the present invention will be described in detail.

Example-1 (Figs. 1 and 2) Paint preparation Main material A liquid * Acrylic prepolymer 30 Titanium dioxide 15 ** Glass beads 16 Cold water stone (0.1 to 0.8 mm) 25 Calcium carbonate (0 to 25 µm) 12 *** Additive (stabilizer) 2 100 (% by weight) Hardener B liquid benzoyl peroxide 40 Diluent 60 100 (% by weight) Mixing ratio A / B = 100/5 (parts by weight) * Example: Mitsubishi rayon Acrysirup DR-450 manufactured by Co., Ltd. * Example: Unibeads UB-108L manufactured by Union Co., Ltd. (refractive index 1.5, particle size 106 to 850) *** Example: Aerosil # 200 manufactured by Nippon Aerosil Co., Ltd. For, the main material A was mixed in its entirety and stirred with a high-speed disper. Curing material B is a material uniformly mixed and dissolved according to the handling method of peroxide.

The properties of these paints are: Viscosity of liquid A: 65 poise (20 ° C), specific gravity: 1.7 Viscosity of liquid B: 0.1 poise 〃 Viscosity of A / B mixed liquid is 55 poise, Thixo coefficient is 4.8 (B type viscometer 6 rotation viscosity divided by 60 rotation viscosity) The usable time after A / B mixing is about 10 minutes.

As the paint for the primer, an acrylic resin-based white paint corresponding to JIS K 5665 type 2 was used.

These paints and glass beads were filled in a paint marker and constructed on the outside line (15 cm width, solid line, white) of a general national road.

First, blow compressed air to clean dirt and dust on the road surface (A), spray paint acrylic resin paint (1) heated to 60 ° C (width 15 cm, film thickness 250 to 300 μm), and immediately after that. A two-component acrylic resin paint was applied to the road surface in a convex hemisphere shape. The shape of this hemisphere (2) is diameter (D): 15m
m, height (H): 5 mm, lateral spacing (L ₁ ) of hemispheres: 5 mm, vertical spacing between columns (L ₂ ): 60 mm, and applied in a horizontal striped pattern in a standard manner. Immediately thereafter, glass beads (JIS R 3301 No. 1, refractive index 1.5, particle size 106 to 850 μm) were pressure-dispersed and fixed to the undried paint and the two-component paint coating film. The amount of glass beads sprayed is about 65 g / m. I blocked and protected the traffic for about 30 minutes and then opened it.

When the retroreflective performance and the slip resistance value of this road marking were measured in a dry state and a wet state, the results shown in Table-1 were obtained, showing better performance than the conventional melting type standard line.

Example-2 Paint preparation Main liquid A * Acrylic prepolymer 30 Yellow lead pigment 12 ** Glass beads 16 Aggregate (Cold water stone diameter 0.1 to 0.8 mm) 25 Filler (Calcium carbonate diameter 0 to 25 μm) 15 Precipitation inhibitor 2 100 (% by weight) Curing agent B liquid Benzoyl peroxide 40 Diluent 60 100 (% by weight) Mixing ratio A / B = 100/5 (parts by weight) * Example: Acrysilap DR-450 manufactured by Mitsubishi Rayon Co., Ltd. * Example: Unibeads UB-108L manufactured by Union Co., Ltd. (refractive index 1.5, particle size 106 to 850 μm) In the same manner as in Example 1, the construction was performed on the general national highway prohibition line (center line). First, apply a yellow paint (JIS-K 5665 type 2 acrylic resin type) heated to 60 ° C as a primer (line width 15 cm, film thickness 200-250 μm, solid line).
Immediately after that, apply the above-mentioned two-component reactive acrylic resin paint in a convex hemisphere shape (D: 15mm, H: 5mm, L ₁ : 5mm, L ₂ : 60mm) and apply glass beads (UB-108 L). Scatter (65g / m), stick, approx.
The traffic was released after 20 minutes.

The retroreflective performance of this pavement marking is shown in Table 1 below, and showed better performance than the conventional melting type standard line.

Example-3 Paint Preparation Main Liquid A * Acrylic Prepolymer 30 Titanium Oxide 12 *** Glass Beads 16 Aggregate (Cold Water Stone Diameter 0.1-0.8 mm) 20 Filler (Calcium Carbonate Diameter 0-25 μm) 20 Precipitation Inhibitor 2 100 (% by weight) Curing agent B liquid Benzoyl peroxide 40 Diluent 60 100 (% by weight) Mixing ratio A / B = 100/5 (parts by weight) * Example: Acrysilap DR-450 manufactured by Mitsubishi Rayon Co., Ltd. ** Example: Unibeads UB-722M manufactured by Union Co., Ltd. (refractive index 1.93, particle size 106 to 1410 μm) As in Example-1, it was constructed as an outer line of a general national highway. First, spray paint with white paint heated to 60 ° C (line width 15 cm, film thickness 250-250 μm, solid line), and immediately after the above 2
Liquid-reactive acrylic resin paint applied in a convex hemisphere shape (D: 15
_{mm, H: 6mm, L 1} : 5mm, L 2: 90mm) , and glass beads (Ub-
722 M) was sprayed (about 65 g / m) and fixed, and traffic was released after about 20 minutes.

The retroreflective performance of this pavement marking is as shown in Table-1 and shows much higher retroreflective brightness than that of the conventional pavement marking and good visibility in rainy weather and at night.

Example-4 (Fig. 3) Paint preparation Main liquid A * Acrylic prepolymer 30 Yellow lead pigment 12 ** Glass beads 16 Aggregate (cold rock stone diameter 0.1 to 0.8 mm) 25 Filler (calcium carbonate diameter 0 to 25 μm) 15 Anti-precipitation agent 2 100 (wt%) Curing agent B liquid Benzoyl peroxide 40 Diluent 60 100 (wt%) Mixing ratio A / B = 100/5 (parts by weight) Construction on the prohibition line for general national highways. First, as a primer, yellow paint (1) heated to 60 ° C (JIS K 5665 2
Acrylic resin type) applied (line width 15 cm, film thickness
200-250 μm, solid line), and immediately after that, apply the above-mentioned two-component reactive acrylic resin paint on convex hemispheres at irregular intervals (D: 15m
m, H: 5 mm, L ₁ 2 to 3 mm, L ₂ 60 to 65 mm), and glass beads are sprinkled (about 65 g / m) on this hemisphere (2) to fix it,
The traffic was released after about 20 minutes.

The retroreflective performance of this pavement marking is as shown in Table-1 and showed higher retroreflective performance than the conventional pavement marking. Also,
When the tires of the car traveled on this road marking, the noise was small, which was not much different from the case of the conventional molten paint.

Next, a comparative example of Table 1 will be described.

Comparative Example-1 Preparation of paint (conventional melting type paint) Thermoplastic petroleum resin (C-5 type) 15 Yellow lead pigment 5 Glass beads 16 Kansui stone (0.1-0.7 mm) 27 Calcium carbonate (0-35 μm) 34 Plasticizer 3 100 (% by weight) As in Example-2, the construction was carried out on the general national highway prohibition line (center line). First, as a primer, yellow paint heated to 60 ° C (JIS K 5665 2nd class acrylic resin type)
(Line width 15 cm, film thickness 200-250 μm, solid line),
After drying, attach a heat-retaining device to the construction machine, fill with the above melt-type paint melted in another melting pot, and apply it in the shape of a convex hemisphere (D: 15mm, H: 5mm, L ₁ : 3mm, L ₂ : 60 mm), and glass beads (UB 108 L) were sprinkled (65 g / m) at the time of applying the melt-type paint, fixed, and the traffic was released after about 5 minutes.

The retroreflective performance of this road marking is as shown in Table-1. It shows excellent performance immediately after construction, but the shape of the convex hemisphere is rapidly broken due to abrasion and thermal softening, and the durability is poor. It was confirmed.

Comparative Example-2 is a normal melting type paint (JIS K 5665 3 type 1)
In the same manner as Comparative Example 1, the aging was carried out by a normal method as a line for prohibiting hammering of general national roads, and the visibility was remarkably deteriorated.

Although not listed in Table 1 below, when the convex hemisphere has, for example, the shape of a rice cake as illustrated in FIG. 5, it is possible to provide a road marking with better visibility at night and in the rain.
This kagami-mochi shape can be formed by using the above-mentioned construction machine with a resin coating material to which the coating dropping energy, surface tension and high thixotropy are imparted.

In the kagami-mochi shape, there are near vertical parts and near horizontal parts. The angle of incidence of the headlight on the glass beads becomes smaller in the near-vertical part, and as a result,
Excellent retroreflective performance. (It is known that the smaller the angle of incidence, the greater the amount of reflection.) Also, the near-vertical portion is well drained, and a water film is hard to form, so the retroreflection performance is excellent. Such a cross-sectional shape that allows many near-vertical parts is advantageous, and the height should be set to 2 mm or more, but if it is too high, there will be problems with the running safety of the vehicle, especially motorcycles, and the height will increase. If is over 10 mm, there is a clear safety problem. If it is less than 2 mm, it will be flooded in the rain and will not be reflective, resulting in poor visibility. Further, when the resin coating material is dropped and formed, it is advantageous that the coating material having a high viscosity and a small diameter has more vertical portions.

(Effects of the Invention) Therefore, the present invention has the following advantages.

It can be easily applied to road markings that have long-term durability, have little retroreflective performance and little deterioration in slip resistance over time, and have excellent visibility especially in rainy weather or at night.

Safety issues such as traffic obstacles have also been resolved, and it is possible to fully expect practical benefits.

[Brief description of drawings]

FIG. 1 is a plan view showing one construction example of the first invention in the method for forming a road marking according to the present invention. FIG. 2 is an enlarged sectional view taken along the line II-II in FIG. FIG. 3 is a plan view showing one construction example of the second invention. FIG. 4 is an enlarged sectional view taken along line IV-IV in FIG.
FIG. 5 is a vertical sectional view showing an example of a convex hemisphere. In the figure, (A) is the road surface (2) is a convex hemisphere

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-57-174507 (JP, A) JP-A-60-252666 (JP, A) Actual opening S50-145522 (JP, U) Actual opening 61- 89009 (JP, U) Japanese Patent Sho 51-6704 (JP, B2)

Claims (4)

[Claims] 1. A diameter of 5 to 50 mmφ and a height of 2 to 10 mm made of a solvent-free reaction-curable resin coating that is fast-drying and highly durable on the road surface.
A method of forming a road marking with good visibility in rainy weather or at night, characterized by coating and solidifying the convex hemispheres in a fixed width at a fixed interval and then applying them in a continuous line. 2. A road-surface made of a solvent-free reaction-curable resin coating that is quick-drying and highly durable, and has a diameter of 5 to 50 mm and a height of 2 to 10 mm.
A method of forming a road marking with good visibility in rainy or night time, characterized by applying and solidifying the convex hemispheres of No. 1 within a certain width at irregular intervals and solidifying them to form a continuous line. 3. The formation of any road marking with good visibility in rainy or night conditions according to claim 1 or 2, wherein the solventless reaction curable resin coating material is an acrylic type, an epoxy type, a polyester type, a polyurethane type or the like. Method. 4. The formation of a road surface display with good visibility in any rainy weather or at night according to claim 1, 2 or 3, wherein the convex hemisphere has glass beads on the surface or inside thereof. Method.