ADD：Qingyang village, Pingdu town,Qingdao City, Shandong Province, China
Plastic placemat manufacturers take you to understand the cl
The first-grade material refers to the raw materials used are scraps that have not fallen to the ground, or are called scraps, some are nozzle materials, rubber head materials, etc., and the quality is relatively good, that is, they have not been used, and they are processing new materials. In the process, the remaining small corners, or the raw materials that are not of good quality. The particles processed with these wool materials have better transparency, and their quality can be compared with new materials, so they are first-grade materials or special-grade materials.
Secondary materials refer to raw materials that have been used once, except for high-pressure granulation. Imported large parts are mostly used in high-pressure granulation. If the imported large parts are industrial membranes, they have not been exposed to wind and sun, so their quality is also very good. Well, the processed particles have good transparency. At this time, it should be judged according to the brightness of the particles and whether the surface is rough.
The tertiary material refers to the raw material that has been used twice or many times, and the processed particles are not very good in various aspects such as elasticity and toughness.
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