What is a plastic grinding mill and what is its function

I. What is a plastic grinding mill?
Plastic grinding mills are key equipment in plastic recycling and processing. They break down hard or soft plastics (such as PE, PVC, ABS, etc.) into uniform powder through mechanical force. According to structural differences, they are mainly divided into three categories:

1. Blade mill: It uses high-speed rotating blades to cut plastics, suitable for brittle materials (such as PVC sheets), with an adjustable particle size range of 20-100 mesh (0.84-0.15 mm).

2. Turbine grinding mill: Through turbine air flow classification, it achieves ultrafine grinding (up to 300 mesh), suitable for high molecular materials such as PP and PC.

3. Cryogenic grinding mill: It crushes tough plastics (such as nylon) at low temperatures (-196℃ in liquid nitrogen environment) to prevent material adhesion.

Ii. Detailed Explanation of the Function of Plastic Grinding Mills
1. Plastic recycling and regeneration

Waste plastics (such as beverage bottles and packaging films) can be crushed, washed and melted for re-granulation. According to statistics from the China Recycling Resources Association, one ton of PET plastic powder can reduce the consumption of 3.2 tons of crude oil (data source: "2022 China Plastic Recycling White Paper").

The particle size of the powder directly affects the quality of the recycled product. For instance, ABS powder with a mesh size of 80-120 (0.175-0.125 mm) is often used in injection molding.

2. Reduce processing costs

Directly using plastic powder to produce products (such as PVC flooring and automotive interiors) saves approximately 15% to 20% energy compared to traditional granulation processes (data source: German Institute for Plastics Engineering).

3. Special industry applications

In the medical field: Medical-grade PE powder (particle size ≤0.045 mm) is used for 3D printing custom prostheses.

- Coatings industry: Adding PVC powder can enhance the wear resistance of the coating.

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