Why does hot melt road marking dry slowly after construction? TOP ROAD tells you

In the process of hot melt marking, in addition to common problems such as bubbles, deformation, and tooth edges, there is also a common situation where the drying speed is slow after marking. But the slow drying speed of the markings is particularly tricky. Below, the TOP ROAD editor will provide a detailed analysis of several key factors that affect the drying speed of marking lines. Let’s take a look together.

High ambient temperature

The standard environmental temperature is 23 ℃. Everyone should have an understanding of this. The drying time for the hot melt marking is at 23 degrees Celsius, not exceeding 3 minutes. If the ambient temperature is higher than this temperature, the drying time will be correspondingly extended.

High road surface temperature

After the hot melt marking construction, due to the high temperature of the road surface, the temperature of the asphalt road surface can reach over 60 degrees Celsius in summer. Once the temperature of the hot melt marking drops to the same level as the road surface temperature, it will not cool down again, and the marking will not dry out.

This phenomenon is generally more likely to occur during the noon period (around 11-16 pm), especially the double yellow line in the middle of the road surface.

Factors related to the coating itself

The use of resins, waxes, and other raw materials with low softening points, as well as the use of white oil, can also slow down the cooling process of the hot-melt marking and cause the marking to soften.

Add excessive leveling agent

Adding excessive leveling agents and other additives, as well as improving leveling properties, to reduce coating costs can also lower the softening point of marking coatings, slow down the drying of hot-melt markings, and cause them to soften.

Solution

1. Try to avoid construction during high temperature periods, and in case of urgent tasks, work overtime in the morning and evening.

Why does the hot melt marking line dry slowly after construction?

2. When encountering a road section that must be opened quickly, row it for 3-5 minutes and then cool it with water spray.

Why does the hot melt marking line dry slowly after construction?

3. Try to use hot melt coatings with a higher softening point and compressive strength.

Why does the hot melt marking line dry slowly after construction?

In summary, for hot-melt marking construction, in addition to maintaining a suitable temperature and strictly controlling the ratio, it is recommended to use hot-melt coatings produced by reputable manufacturers that meet national standards.

TOP ROAD has been deeply involved in the marking paint industry for 30 years, and is a high-tech, specialized, and innovative enterprise that integrates research and development, production, sales, and technical services.

Our company is a professional manufacturer of road hot-melt coatings, road retroreflective measuring instruments, and road marking machines. If you are interested, please feel free to communicate with me via email at any time export@toproadtraffic.com