Marking paint manufacturers share several common problems and solutions of hot melt coatings in construction

Multiple types of coatings can be used for the construction of marking machines. The coatings used for highway markings mainly include solvent based coatings, heating based coatings, hot melt coatings (also known as melt based coatings), two-component coatings, water-based coatings, and other types.

Next, let’s discuss several common problems and solutions in the construction of hot melt coatings with everyone:

一、 Color change issue

During the melting process, the temperature is too high or the bottom of the hot melt kettle is burnt. The solution is to strictly control the temperature and clean the bottom of the hot melt pot before operation.

二、 Poor reflection effect at night

1、During construction, glass beads are blown away by strong winds; The uneven distribution of glass beads on the surface is caused by factors such as the shaking and tilting of the spreader. The solution is to install a windproof cover on the glass wave spreader and prepare for the coating operation, and control the construction progress speed.

2、Too many impurities, low roundness rate, poor particle size distribution, coating flowability that does not meet technical requirements, insufficient viscosity, and low softening point on the pre mixed surface can all cause poor reflection effect at night. These all belong to substandard quality. Qualified products should be used during construction.

三、 Crack problem

1、During winter construction, the coating shrinks when exposed to cold, resulting in internal stress. When this stress is concentrated in one location, it is prone to cracking; The cracks that appear due to cold are related to the construction season and the performance of the paint, as well as to the condition of the road surface. Especially for newly laid cement pavements with fragile mortar layers or curing films, they are prone to cracking. To prevent cracking caused by cold weather, the first step is to choose a suitable construction season and try to avoid marking construction in the cold winter. At the same time, it is important to pay attention to the reasonable use of hot melt coatings and choose the appropriate coating ratio for different seasons. The newly laid cement pavement should be maintained for at least 2 weeks, and the fragile mortar layer or maintenance film on the pavement should be cleaned before the construction of road markings.

2、Reflection cracks caused by roadbed cracks.

Cracks in road markings caused by the expansion or contraction of roadbed materials, or uneven settlement. In general, it is unavoidable to strengthen the construction quality of the roadbed.