Road Safety of Reflective Material In accordance with the marking of the visual function
Road traffic marking material classification is more, in addition to set by the way, the use of functional, form division, but also in accordance with the marking of the line to recognize the function, can be divided into reflective, non-reflective type, class. Reflective marking material is the standard material in the pre-mixed anti-reflective material or in the reticle construction when the surface sowing anti-reflective material; reflective type marking line, including dry anti-reflective marking and all-weather reflective marking; There is no retroreflective material in the reticle material or the surface does not sift the retroreflective material; the light storage type marking material is the material containing the powder in the marking material, and in the case of light, the powder absorbs and stores the light energy. When the light is below a certain level, the energy stored in the storage powder is emitted by light.
Talking about the characteristics of the anti-reflective markings, it is inseparable from the composition of the reflective line of the type of paint. At present, China's road traffic marking is in accordance with the standard coating material to divide, there are four: solvent, hot, water-based paint and two-component marking, there is a just started to use the anti-calibration band. According to China's "road marking paint" standard (JT / T 280-2004) requirements, road traffic marking material is divided into solvent-based road traffic marking materials, hot-melt road traffic marking material, two-component road traffic standard Line materials, water-based road traffic marking materials, and other four types.
Solvent-based paint, or is the first use of road traffic marking paint, mainly acrylic and chlorinated rubber type two categories. After years of development and application has been widely known and accepted by people, in general, construction is simple and convenient, easy, adaptable, for the old marking of the secondary coating is relatively easy, you can directly coated on the old coating New coating, drying time fast, cheap, easy repair, one-time investment less. However, due to its short life, the construction of a large number of paint in the organic solvent evaporation, serious pollution of the environment, endanger the health of construction workers, more stringent environmental requirements and limited service life, greatly limiting the development of such coatings, To show a decline in the application of trends in some economically underdeveloped areas of small and medium towns and rural roads, such products there is a certain market.
Hot melt type marking paint is the 20th century, 50 years first developed in Europe, because of its line appearance, durable, rapid development. In recent years, hot-melt marking paint in China's high-grade highways and urban roads have been widely used, such coatings in the quality of products, has a good reflective effect, durability, long life, fast drying time; But also its weaknesses, mainly the construction of the need for special heating equipment, emissions, construction costs are higher, accounting for almost the total cost of 1/3, the construction efficiency is also low, the standard line is difficult to make up, stain resistance by construction quality And the impact of road quality, sometimes not ideal.
Water-based road traffic marking paint in the United States, Western Europe and other developed for a long time, and has been a certain application, water-based paint is an environmentally friendly coating, the main advantages are: volatile organic content is low, non-flammable, Environmental pollution, will not harm the health and safety of construction workers; no need to clean up the old line, repair, update safe and convenient; mechanical equipment easy to clean. The main drawbacks are: water resistance and concrete floor adhesion to be further improved, the construction by the environment and the weather is greater, only in the temperature above 10 degrees, relative humidity below 80%, 24 hours without rain, no water pavement And sand in the case of construction.