Plastic particle density tester is widely used Zui for measuring the density value of plastic particles in rubber, plastics and other industries, but small bubbles are often encountered on the sample surface during measurement. Many people do not care about such a phenomenon. In fact, the bubbles attached to the product surface have a great impact on the result of sample density measurement.

Why emphasize the effect of bubbles on the density of plastic particles?

1. Measure the density of plastic particles and experience accumulated for a long time.

2. Because measuring plastics are the products of petrochemical industry, the particle surface contains oil. Due to the surface tension of water, bubbles are easy to adhere.

3. Plastic particles are mixed and melted → strip drawn for production → cut into particles of about 0.3cm × In the process of 0.8cm, it is easy to make plastic particles have pores and bubbles. This causes poor reproducibility when testing plastic particles.

4. Bubbles attached to plastic particles. According to the Research Report:

·One diameter Φ 0.5mm bubbles will cause a buoyancy less than 0.0001g;

·One diameter Φ 1mm bubbles will produce a buoyancy of 0.005g;

·One diameter Φ 2mm bubbles will produce a buoyancy of about 4.200g.

For example, how to reduce the bubbles attached to the sample surface when measured by the plastic particle density tester?

We need to understand the principle of bubble generation. As long as we soak the sample to be measured in anhydrous alcohol before putting it into the water tank to dissolve the oil on its surface, we can effectively remove the bubbles on the surface.