What is the principle of recycling and granulating PP/PE waste plastic film? What are the main mechanical equipment involved? ?

There are four main processes in the recycled PP PE process

The first step is the crushing process.

The effect of crushing and washing with water is better. Since some good high-pressure membranes are kept clean enough, they can be blown again without adding new materials. Therefore, pay attention to cleaning during the crushing process. When the crushed material flows into the sink, it is best to roll again for the purpose of further washing the clean spots.

The second step is the drying process.

Generally, the remaining water is dried in a spin dryer, and dried if possible, which can save electricity bills and improve quality. Of course, attention should be paid to prevent secondary pollution of materials during drying.

The third step is the granulation process.

The pellets produced by a special extruder have two basic uses: film blowing and injection molding. The material coming out of the 60 to 80 mesh filter can be blown again; the material coming out of the 40 to 60 mesh filter can meet the quality requirements of injection molding. Generally speaking, the high-pressure material is blown again, the good quality is good, and the black film and garbage bags are almost blown. The price after injection is lower.

The fourth step is the pelletizing process,

Usually cold water cutting. In this process, attention must be paid to distinguishing labels when packaging. One for blow molding and one for injection molding, so as not to make mistakes. In addition, the packaging bag used for blow molding must be lined with an outer bag to avoid secondary pollution.