Hot melt marking whitening agent is a special chemical substance, and its whitening mechanism is mainly based on optical principles. It can absorb ultraviolet light (usually the ultraviolet part of sunlight) and then emit blue purple fluorescence. This fluorescence overlaps with the original color of the marking, effectively enhancing the whiteness and brightness of the marking. For example, in white hot melt markings, whitening agents can make the markings more prominent under various lighting conditions, especially at night or in low light environments, and improve the driver’s recognition of road markings.
Therefore, the use of non yellowing whitening agents is crucial for a hot melt marking coating, but why do some whitening agents cause yellowing of hot melt marking coatings after use? What type of whitening agent does not turn yellow after use?
Whitening agent, also known as fluorescent whitening agent, is a type of optical whitening agent that uses visible light absorption to excite its own blue and white light, which is used to remove yellowing and improve whiteness. When combined with physical masking and whitening of titanium dioxide, it can make it whiter on the basis of titanium dioxide. There are many types of fluorescent whitening agents on the market, and traditional fluorescent whitening agents such as OB, 127, and OB-1 have been used by customers of hot-melt marking coatings. They gradually choose not to use them because they have good whiteness just added, but after a week or even overnight, yellowing problems occur. This is because the weather resistance level of these traditional whitening agents is relatively low, with good weather resistance level at level 5 and poor at level 2, far from reaching that of hot-melt marking coatings. Due to usage requirements, yellowing occurred.
Hot melt marking whitening agents play an indispensable role in road traffic safety. Correctly selecting and using appropriate whitening agents can improve the quality of hot-melt markings, provide stronger guarantees for road traffic safety, and enable drivers to recognize road markings more clearly during driving, ensuring driving safety.
Shandong Subang Fluorescent Technology Co., Ltd. has devoted several years to continuous research and development, testing and demonstration, and has developed a hot melt marking coating whitening agent. The weather resistance level has been improved, and the product contains anti yellowing factors, which not only remove yellowing but also prevent yellowing. After use, the whiteness of the hot melt marking coating is greatly improved, and it can be maintained for a long time without yellowing or fading. It is a good choice for hot melt marking coating whitening agents.
Post time: Nov-13-2024