The physical recycling of PET plastic bottles is relatively simple, mainly drying and granulating the cleaned PET plastic bottle waste. The physical handling of PET plastic bottles is closely related to the sorting process.
There are two main types of physical recycling:
One is to shred waste PET plastic bottles into pieces, separate HDPE, aluminum, paper and adhesive from PET, and then wash, dry and granulate the PET pieces;
The second is to mechanically separate the non-PET bottle caps, bases, labels and other impurities on the waste PET plastic bottles, and then wash, crush and granulate. Recycled PET must not contain PVC impurities, otherwise it will affect the color of PET.
When the amount of PVC mixed in is small, it can be separated manually on the conveyor belt, that is, when subjected to torsion, PVC and PET plastic bottles have different melting points at the stressed part, and the broken PET and PVC fragments are passed through a heater and temperature Controlled conveyor belt, PVC is melted and adhered to the conveyor belt, which can be separated from PET.
However, for the recycling of PET beverage bottles, there are also special production lines. For example, the economical PET polyester bottle crushing, cleaning and recycling production line is mainly used to recycle waste mineral water bottles, beverage bottles and other PET polyester bottles in daily life. After a series of processing such as unified and centralized classification, label removal, crushing, cleaning, and dehydration of plastic containers such as cans, cans, clean PET polyester chips are obtained. Based on the reference of years of market survey data, Lvfeng Environmental Protection specially designed this set of economical PET bottles for medium and small PET recycling cleaning plants (with an annual production capacity of less than 10,000 tons) and some beginners in the field of recycled PET recycling. Cleaning recycling line. The processing technology of this production line is simple and practical, with low operating cost, high cost performance, and small equipment footprint. The PET polyester chips produced are mainly aimed at medium and low-end industrial applications such as chemical fiber short filaments and colored melt filling. The economical PET washing and recycling line is mainly composed of five parts: label removal, crushing, cap separation, hot washing and dehydration.
The recycling process of PET plastics is generally divided into labeling (labeling machine removes label paper), crushing (crusher crushing), screening (sorting different types of plastic bottles), cleaning (pre-cleaning and rinsing machine for cleaning), Drying (Pet bottle flake dehydrator, pipeline drying and other equipment for drying), granulation (using pet bottle flake granulator for granulation).