Introduction to the basics of grading of recycled plastic particles

Recycled plastic granules are mainly classified according to the different raw materials used and the characteristics of the processed plastic granules, and are generally classified into one, two and three grades.

The first-grade material means that the raw materials used are scraps that are not grounded, or called chamfers, some are spouts, rubber heads, etc., the quality is also good, that is, it has not been used, in the process of processing new materials. In the middle, the remaining small corners, or the raw materials of quality. The particles processed from the wool have good transparency and the quality can be compared with the new material, so it is a first-class material or a special material.

The secondary material means that the raw material has been used once, except for high-pressure granulation. In the high-pressure granulation, most of the imported large parts are used. If the imported large parts are industrial films, they are not exposed to the wind and the sun, so the quality is also very high. Well, the processed particles have good transparency, and should be judged according to the brightness of the particles and whether the surface is rough.

The tertiary material refers to the raw materials that have been used twice or more. The processed particles are not very good in terms of elasticity and toughness and can only be used for injection molding. The first and second materials can be used for blown film, wire drawing and the like.

Plastic special grade: close to raw materials, 80-90% of raw material price;

Level 1: 70-80% of the price of raw materials;

Level 2: 50-70% of the price of raw materials;

Level 3: 30-50% of the price of raw materials.

Sometimes from the quality points: drawing, blown film, spinning, primary, secondary, injection molding and so on. Sometimes it is reclassified at the same level.