Household plastic waste refers to discarded plastic products generated from daily life activities. It includes a variety of types, is widely dispersed, and is difficult to collect. Examples include plastic bottles, plastic packaging bags, paper-plastic composite materials, and other plastic products that have lost their utility. After the fragmentation of household plastic waste, material separation can be achieved through several methods:
Silicone rubber sorter: Specifically designed to remove impurities such as silicone, rubber, and sawdust from plastics. It can eliminate some other impurities in plastics, reducing the complexity of the material.
Plastic electrostatic separator: Used for separating plastics of different materials, capable of simultaneously separating 2-5 types of plastic materials. In addition, over the past two decades, with the development and maturity of technology, optical sorting techniques such as infrared sorting, X-ray sorting, and color camera sorting have become increasingly widespread in the recycling and regeneration of waste plastics.
Wind shaking bed sorting: Wind shaking bed sorting is a special method of wind sorting. Its principle is to use the vibration of the bed surface and the rising airflow to stratify particles based on density.
Magnetic separation: Magnetic separation is a method of separating ferrous metals using magnets. The main purpose is to remove metal debris such as steel that is mixed into waste plastics.
Density separation (floatation): Density separation utilizes the property that different plastics have different densities for sorting. The specific method involves placing mixed waste plastics into a solution with a certain density, and then sorting them based on the floating or sinking state of waste plastics in the solution.
Manual sorting: Manual sorting involves manually separating impurities mixed in waste plastics and distinguishing between different types of plastics. This method is time-consuming, labor-intensive, and inefficient, but it has low investment, is easy to start, and offers flexible operation.
These methods can be selected and combined based on actual conditions and requirements to achieve the best separation results.