EN
Road markings are important in directing traffic particularly during the dark or during bad weather. Markings must be visible by reflecting headlight beams back toward the driver. This important role is accomplished by using glass micro beads in the marking material. Hebei Runhuabang New Material Technology Co., Ltd. is engaged in the crushing, processing and distribution of non-metallic minerals such as glass beads.
How Glass Micro Beads Create Retroreflectivity
The quality whereby a surface sends light back to its source is known as retroreflectivity. Glass micro beads do so due to the spherical shape and high refractive index. As the light of the headlights of a vehicle passes through a glass bead, it curves at the surface and passes through the sphere, bounces back at the rear surface and moves out to the driver. This optical effect requires the beads to be partially embedded into the road marking with the top hemisphere being open to the air to achieve proper functioning. The exact index of the glass, which is used, defines the efficiency of the returned light. Hebei Runhuabang New Material Technology Co., Ltd. manufactures glass micro beads whose refractive index and sphericity are controlled to achieve the maximum retroreflective brightness. Beads that are poorly shaped or those that have air bubbles within them are not able to provide the same visibility.
Standards and Specifications for Road Marking Beads
Production standards for glass beads for road markings differ regionally but their requirements are generally the same. The allowable limits for bead size distribution, refractive index, roundness and chemical durability are prescribed by various international standards, such as EN 1423 and EN 1424 in Europe, AASHTO M247 in the USA, and KS L 2521 in Asia. Beads for road markings are usually classified by size. The bigger beads will be on the surface first giving a very high retroreflectivity initially, and the smaller ones become visible as the marking material is worn down. For a road marking to remain visible throughout its service life, a road marking mixture must consist of different sizes of beads. Hebei Runhuabang New Material Technology Co., Ltd. applies a high standard in its quality management so that its glass microbeads meet or exceed these international standards. Each lot is tested for sphericity, particle size distribution and cleanness.
Application Methods for Maximum Performance
The manner in which glass micro beads are used on road markings has a big influence on their performance. Two methods of application are used. Drop-on application is a process where beads are applied onto the wet paint or thermoplastic right after its application. As a result of gravity, the beads get slightly settled within the coating and the other half is visible on the surface. Premix application is where the beads are introduced into the marking material in such a way that as the surface wears away new beads are revealed. The combination of the two techniques in many high-performance road markings has large drop-on beads providing high reflectivity in the short term and smaller premix beads giving high reflectivity in the long term. Hebei Runhuabang New Material Technology Co., Ltd. offers technical advice on how to choose the correct bead sizes and application rates to their individual marking systems and traffic conditions.
Factors That Affect Retroreflectivity Over Time
The retroreflectivity of road marking is not constant over the life of the marking. A number of things lead to slow deterioration. Traffic abrasion erodes the marking surface and may remove or break off glass beads. Vehicle dirt and oil deposits on the marking surface and coats the beads and reducing light transmission. The snowplows may actually plow away the beads and the marking compound. High quality glass micro beads of good chemical durability and high adhesion to the marking material are used to slow this degradation. Hebei Runhuabang New Material Technology Co., Ltd. is a company that processes glass beads that are resistant to abrasion and have their optical properties even with heavy traffic loads. The trust and after sales service will guarantee road marking contractors to deliver quality services in bulk projects.
Environmental and Safety Benefits of Proper Bead Selection
The selection of the appropriate glass micro beads enhances safety and environmental performance. Retroreflective road markings are used to provide the road user with a lot of information about the lanes boundaries and guidance at a distance to afford more time to respond. This is especially significant to the older drivers whose night vision might be lesser. Properly retained retroreflectivity also allows lighting of some roads to be saved on overhead lighting to save energy. Environmentally, the use of durable glass beads which will not fall off the marking during its lifetime will minimise the microplastic contamination that may arise when using poor quality marking materials. Hebei Runhuabang New Material Technology Co., Ltd. believes in manufacturing glass micro beads that can help support safer roads with a minimal impact on the environment.
Conclusion
The micro beads made of glass are the crucial elements of the contemporary system of road marking, which turns the usual paint or thermoplastic into the most noticeable protective elements. Knowing the mechanism of retroreflectivity, maintaining international standards and proper use of beads will help road authorities ensure the safety of driving at night greatly. Hebei Runhuabang New Material Technology Co., Ltd. is a company that integrates a strong technical and economic power with advanced production technologies to provide glass micro beads that can provide consistent retroreflective performance. We invite both the domestic and international traders to cooperate with one another and develop together.