The underwater pelletizing unit is similarly suitable for pelletizing of practically all thermoplastics. However, its ideal use is

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for thermoplastics which tend to clog the die plate and stick to the knives (e.g. PP, LDPE copolymers), and

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in large production plants for mass plastics such as polyolefins and polystyrene (underwater pelletizing sizes in the upper output range)

Special features and advantages of underwater pelletizing

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Constant pellet quality

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Partly automated, simple start-up procedure

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Lower personnel requirement for start-up procedure

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When using a low-pressure pocket die plate, there are further benefits:

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Low pressure build-up due to optimized flow channels saves energy and protects the product

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Large number of bored holes per die plate size – thanks to the patented structure – facilitates high outputs

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Optimized heating flue system ensures even and intensive heating of the die plate

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No freezing up of the liquefied material in the holes on the die plate when starting up

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Long lifetimes for die plate and pelletizing knife, thanks to specially-developed wear-resistant materials alloys

Technical data on output for the underwater pelletizer

* = steam or heat transfer oil

** = the output figures are valid for thermoplastic synthetics which can be pelletized on the underwater pelletizer such as polyolefins, TPU, TPE, styrene products, filled and/or strengthende polyolefins