Road marking is an indispensable part of every urban traffic, and it undertakes the important responsibility of regulating traffic. Now the main marking construction in the market is divided into two types, hot melt marking and cold spray marking.
The normal temperature paint used in general hot-melt marking lines includes ester glue, epoxy, acrylic and chlorinated rubber.
Acrylic paint and chlorinated rubber have a faster drying time, epoxy paint has better adhesion and durability, and ester paint has a limited amount due to poor wear resistance. The effective service life of normal temperature solvent-based paint is 4 to 8 months.
It is a heating solvent-based coating, which has a low heating temperature and is formed into a film by solvent volatilization and resin oxidation polymerization in the air. The drying speed is fast, the coating film is thick, the service life can reach 8~15 months, and the reflective effect is good.
For hot-melt coatings, it is necessary to heat up the powder coatings during construction to melt them, apply them to the road surface with special equipment, and form markings after condensation. This kind of marking line solidifies quickly, has strong wear resistance, has an effective life of 20~36 months, and has good reflectivity. It is suitable for many urban roads.
Two-component marking paint refers to the marking formed by the chemical reaction of two or more components
Generally divided into two types: epoxy resin marking and PMMA marking
Epoxy resin generally needs to be cured at above 10°C. If the temperature is too low, the curing time will be too long. In summer, the temperature is over 30°C, and the curing time can be released for traffic in only 20 minutes. When the temperature is below 10°C, the curing time will be more than 8 hours. . At the same time, the aromatic ether bonds existing in the molecule are easily broken under the irradiation of ultraviolet light, thus resulting in poor outdoor weather resistance of the coating film.
The wear resistance of the PMMA two-component marking refers to the ability of the coating film to not fall off after repeated friction. The film-forming principle of the two-component marking line is to form a macromolecular network structure through chemical reaction, which determines that the two-component marking line has inherent advantages, and the formed two-component marking line does not produce low temperature fracture and high temperature softening phenomenon. , forming a strong adhesion with the road surface, the glass beads on the surface of the two-component marking line are not easy to fall off, and have good wear resistance, thereby ensuring the continuous reflection of the marking line.
Especially in the highway dashed lines, zebra crossings and other road sections that require high wear resistance with large traffic flow, two-component scraping type markings are used, usually 1.2-1.5mm. Through the guarantee of thickness, the two-component marking can be The advantages of high wear resistance are even more prominent, and even the wear resistance of the two-component spray marking line of 0.6mm and the thickness of the hot-melt marking line of 2mm is equivalent. These data show that the excellent wear resistance of the two-component PMMA marking line makes the people are convinced.
Tianshi produces waxes for road marking paint, please feel free to contact us.
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