Brief Overview and Advantages of Waste Diaphragm Recycling Processes

1. After opening the lithium battery plastic film, tear it to the appropriate length.

2. After tearing, the plastic film undergoes friction-based dry cleaning. The rotor blades, spinning at high speed, frictionally remove impurities such as copper and aluminum black powder that are mixed within the membrane. The black powder is collected under negative pressure, while copper and aluminum particles are discharged from the bottom outlet of the dry cleaner, thereby achieving waterless dry cleaning and impurity removal for the plastic film.

3. After frictional dry cleaning, larger plastic particles and heavy impurities are separated via air classification based on specific gravity, resulting in a relatively pure separator membrane.

4. Add modified additives to the diaphragm after frictional dry cleaning, then carry out polymerization modification at a temperature of approximately 190°C, enabling the different plastic films to become mutually soluble and be transformed into a relatively stable polymeric material, thereby creating a new modified material.

5. After polymerization, the new plastic material is cut into small pieces and then fed into a buffer‑type quantitative feeding system for metered delivery to the compression molding equipment.

6. Molding equipment extrudes polymer materials into products such as plastic lithium-ion battery trays and plastic baskets, which are then cooled and shaped to produce finished plastic products.

7. During the polymerization and molding processes, the generated flue gas—primarily consisting of water vapor and a small amount of organic waste gas—is treated through filtration and catalytic adsorption before being discharged in compliance with emission standards.

Advantages

1. Environmental Protection and Cost Advantages: Waterless dry cleaning avoids wastewater generated by wet processes at the source, making it more environmentally friendly. At the same time, converting waste separators into high‑value products reduces both solid waste disposal costs and raw material costs.

2. Performance Improvement: By using precise modification formulations—such as adding compatibilizing toughening agents—their mechanical properties can be restored and enhanced, meeting the required strength and toughness for pallets.

3. Achieve “downgrade” utilization: This technology successfully transforms waste separators into high‑value plastic pallets, serving as a model for resource recycling.

Equipment and Products for the Reuse of Spent Diaphragms