About Kreyenborg Industries


Kreyenborg Industries
720 Raco Drive
Lawrenceville, GA 30045
United States

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Product Name:   CrystallCut® Underwater Pelletizing System for PET

We start at the point where the PET melt has been extruded by the die and cut by the face cutter. The cut hot PET granulate is now rapidly transported in hot water (of up to 95°C) to a pellet dryer in the closed conveying pipes, where pellet cooling and solidifying takes place. Important criteria in the effectiveness of CrystallCut® are, the conveying medium and relatively short conveying distances between the die head and the pellet dryer. PET pellets exit the pellet dryer at a temperature of about 150 – 160°C onto a vibrating conveyor which is designed in a similar way to oscillating separators of undersize and oversize pellets (but there are no sizing screens). The conveyor is divided into several zones, the vibrators keeping the pellets in permanent motion which enables them to pass on their energy to other pellets. In each zone, circulation of PET pellets stops them sticking together. After about six minutes in the vibrating conveyor the PET pellets are crystallized to a degree of about 40 % and have a temperature of around 150°C. At this temperature PET pellets can be transported directly into the SSP without sticking together. Advantages of CrystallCut®: -degree of crystallization approx. 40% -almost dust-free product -up to 8% higher bulk density -lower energy consumption -reduced production costs -direct transportation into the SSP possible -quick start-up of the line and change of product -due to the even crystallinity, the PET cannot stick together

  


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