The plastic particle density tester measures the density value of plastic particles, which is widely used in industries such as rubber and plastics. However, small bubbles on the surface of the sample are often encountered during measurement, and many people do not pay attention to this phenomenon. In fact, the bubbles attached to the surface of the product have a significant impact on the results of the sample density measurement.

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

1. Measure the density of plastic particles and accumulate long-term experience.

2. Because measuring plastics is a product of the petrochemical industry, the surface of particles contains oil components. Due to the surface tension of water, bubbles are prone to adhere.

During the process of mixing and melting plastic particles, producing strips, and cutting them into granules of approximately 0.3cm × 0.8cm, it is easy for plastic particles to have pores and attach bubbles. Causing poor reproducibility when testing plastic particles.

4. Bubbles attached to plastic particles. According to the research report:

·A bubble with a diameter of Φ 0.5mm will cause a buoyancy of less than 0.0001g;

·A bubble with a diameter of Φ 1mm will generate a buoyancy of 0.005g;

·A bubble with a diameter of 2mm will generate a buoyancy of approximately 4.200g.

How to reduce the bubbles attached to the surface of the sample when measuring with a plastic particle density tester?

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