How To Choose the Right Pelletizing System for Your Recycling Machine
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Strand pelletizer is usually used for PET, and materials with a high melting index are difficult to process using a water-ring pelletizing system.
In a strand pelletizing system, the plastic materials (like PET, PP, and PE) melt first passes through a water bath where it is cooled and turned solid. The plastic waste is then pelletized by air knives, where the water is removed from the surface of the pellets at the same time.
In a water-ring pelletizing system (also known as hot die face pelletizing), the plastic waste melt coming from the recycling extruder is directly cut by the rotating knives attached to the surface of the die head.
Round-shaped plastic pellets are produced and cooled inside the water ring immediately, flushed out, separated from water on the vibration table, and pass through a centrifugal dryer at the end.
Water ring pelletizing system has been the most popular choice for PE and PP recycling plastics. If you are processing post-industrial or post-consumer plastic film, raffia and regrind - water-ring pelletizing is without a doubt the most recommended and efficient system on the market today.
However, if you mainly recycle plastic material with high melting index, it might be more suitable to go for the strand pelletizing instead.
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Content:
0:00 Introduction
0:16 Pelletizing systems
0:27 Strand pelletizing
0:47 Water ring pelletizing
1:14 Most popular for PE/PP
1:34 Suitable system for higher MFI
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