Plastic products play an important role in various fields of industrial and agricultural production and life with their excellent properties such as light weight, high strength, corrosion resistance, and easy processing. However, with the widespread application of plastic products, the disposal of waste plastics has become a difficult problem, among which the “difficult to degrade naturally” has become a chronic problem that needs to be solved urgently in global environmental pollution.
In recent years, with the rapid development of my country’s plastics industry, the plastic granulator industry has also developed rapidly. The granulator can make recycled plastic products into plastic pellets through various processes to achieve the effect of plastic recycling. The granulator industry involves many areas of the national economy. It is not only an indispensable basic production link for a large number of industrial and agricultural products, but also plays an important role in solving my country’s plastic pollution, increasing the recycling rate of plastic products, and establishing a perfect plastic recycling system. .
For recycled plastics companies, how to choose a pelletizer suitable for their own use is very important, because a plastic pelletizer cannot produce all plastics due to different plasticization and extrusion pressures. General granulators can recycle and granulate plastics in daily life, but like some special plastics, such as engineering plastics, cross-linked polyethylene, spun cloth, etc., special granulators need to be recycled and granulated. Therefore, manufacturers must pay attention to the types of plastics they need to recycle when purchasing a pelletizer, and then choose a suitable pelletizer.
In addition, when purchasing a granulator, you also need to pay attention to the following points:
Clarify the purpose and purpose of purchasing the granulator. At present, there are roughly three types of customers who buy granulators in the market. They are invested and started by individual or private companies. Plastic manufacturers buy granulators to solve the problem of leftovers from their own factories. Then there are distributors and trading businesses. For customers who start their own businesses or private enterprises, they must clarify the types of plastics produced by the enterprise when purchasing a pelletizer. General pelletizers can only recycle and produce general-purpose plastics based on PP and PE, which are also common plastic raw materials in the plastics market. The PS foam material market is relatively small. If there is a clear sales channel for special plastics, users can also purchase corresponding pelletizers.
The performance of the granulator. Granulators can be divided into single-screw granulators and twin-screw granulators according to the number of screws. When the single-screw granulator is working, the plastic is conveyed forward in a spiral in the barrel. When the twin-screw granulator is working, the plastic is conveyed forward in a straight line in the barrel. According to the working principle, when the twin-screw machine is stopped, the material in the machine can be basically emptied, and the single-screw machine can store a small amount of residual material. Most plastics can be pelletized, and the single- and twin-screw can be used without distinction.
However, when making recycled plastics, due to the larger surface of the mold changing screen and easier blanking, the single-screw machine is more effective; when making modified plastics, color masterbatches, and mixed color pumping, the effects of the two machines are equal. ; When making lengthened glass fiber and cross-linked submarine cable materials, only twin-screw granulators can be used. In addition, in terms of machinery procurement costs and later production costs, single-screw granulation opportunities are much lower, while twin-screw granulators are at a significant disadvantage. Therefore, when purchasing equipment, it is necessary to select the corresponding equipment according to the different products produced by the enterprise.
Post time: Nov-25-2020