In the application of china reflective hot melt marking paint material, bubbles often appear, such as soybean and sesame. Although such defects do not affect the service life, they affect the beauty carefully, which has been a difficult problem for a long time!

After years of practice, industry exchanges and expert consultation, it is found that the bubbles of china reflective hot melt marking paint material mainly come from six aspects, a method to test where the bubbles come from and a shortcut to reduce bubbles. The specific analysis is as follows:

 Six aspects of bubbles in china reflective hot melt marking paint material

1. The air in the pavement gap is generated by heating

When the temperature of china reflective hot melt marking paint material is about 200 ℃, it will be coated (covered) on the road to form the marking. At the same time, it will take 3-8 minutes for the marking to dry. Within these minutes, the air in the fine seam of the road will be heated and expanded to the top.

Performance 1: if the bubble is large, the bubble top breaks and the film breaks, which is what we want, and there will be no bubbles when it comes out;

Performance 2: some small bubbles are left in the marking coating or at the bottom of the marking before they are pushed out and the marking is dry, which will not affect the appearance and will not be investigated;

Performance 3: the bubble has just emerged from the film surface, but it has not broken. The film has dried and left pitting. Although it does not affect the service life, it will be a headache once the owner makes in-depth research!

Solution: raise the temperature of china reflective hot melt marking paint material by 5-10 degrees, improve the leveling property of the paint, reduce the viscosity of the paint and let the bubbles out; Or reduce the material temperature by 5-10 degrees, improve the viscosity of the coating, prevent bubbles from jacking up and stay in the marking!

2. Air bubbles will be generated when the ground is wet

The moisture in the wet pavement will be heated and evaporated to produce bubbles. The construction can be carried out only after the pavement is dry. Pay special attention to the moisture of the pavement in the morning and evening of winter.

3. Bubbles will also be generated if the bottom oil is not dry

Before the bottom oil is dried, the solvent in the bottom oil is not completely volatilized, and bubbles will be generated when volatilized by heating. Do not scratch until the bottom oil is completely dry. Otherwise, in addition to bubbles, it is also very easy to cause deflagration of the dry bottom oil and safety accidents!

4. The modified asphalt is easy to produce bubbles when exposed to heat

Taking expressway as an example, high-grade highways often use modified asphalt, and the modifier often produces bubbles when it meets heat. In case of in-depth research and excessive pursuit of perfection by the owner, about one thousandth of soybean oil (or salad oil) can be added during burning, so as to sacrifice the compressive strength of the marking and improve the leveling of the material, so as to reduce bubbles to meet the requirements of the owner.

5. The alkaline cement pavement is easy to blister

The cement pavement with too heavy alkalinity is prone to blistering. I can only overcome it by cleaning the floating ash and the bottom oil twice! Also just reduce, not eliminate!

6. The cement pavement is loose and has many bubbles

When encountering this kind of pavement and symbolizing "winning the prize", we can only balance it by two times of bottom oil and adjusting the material temperature!