Drying and Crystallization of PET chips/scraps/pellets

If you use Twin-screw or Multi screw extruder with vacuum degassing system, why still need to use Infrared crystal dryer to work together?

lContinuous material feeding into Sheet extruder

lIncreased output: up to 50% higher

lIncreased bulk density of material: normally 20-50% depends on material type

lReducing the complexity of vacuum system

lIncreased stability of the operation of extruding line and product quality

lLower requirement for raw material used

lLow down the operation cost up to 20% compared to the systems without IRD (Infrared crystal dryer )

Our processing

Normally the PET Bottle flakes or sheet scrap with initial moisture level of up to 10000-13000ppm. The PET Bottle flakes or sheet scrap (Virgin or mixed ) 

will be recrystallized in a continuous IRD in 10-15mins.The drying temperature will be 150-180℃and dried to 1000ppm,

then fed to Double screw extruding system for further processing 

lLimiting the hydrolytic degradation of the viscosity.

lPrevent increasing AA levels for materials with food contact

lIncreasing the capacity of the production line up to 50%

lImprovement and make the product quality stable-- Equal and repeatable input moisture content of the material


Processing explanation

Continuously processing ( Production without interruption with PET Sheet production line )

1. Material Feeding 

By vacuum dosing feeder to convey the raw material continuously to the rotating drum

2. Drying and Crystallization

Thermal treatment and mixing. There are the spirals welded into the rotary drum to ensure the well mixture of material and continuous transfer to the outlet. 

And the material will also be dried continuously

3. Discharging

The dried and crystallized material will be discharged after minutes drying by drum rotary. Finally the dried and crystallized material will be conveyed to the next processing.

Advantage of IRD Processing 


 Rotary drum design

To dry the material evenly



The spiral coils design of the drum ensure the good mixture of the raw material to avoid material clumping


Retention time

Depends on the speed of Rotary drum



The speed can be adjustable by the property of drying material


PLC Controlling system

The material retention time,drum rotating speed



The Infrared lamps performance, drying temperature



The feeding speed of Vacuum feeder



Recipes and process parameters can be stored in the controlling system to ensure opimal and reproducible results


In one step

Drying and crystallization in one step


High efficiency

Minutes drying and crystallization instead of hours( Compared to conventional dehumidifier and crystallizer)


Fast cleaning

Allow for easy and fast cleaning.
     Rapid product change-over


● In order to ensure the accuracy of each part, we are equipped with a variety of professional processing equipment 

   and we have accumulated professional processing methods over the past years.
● Each component before assembly needs strictly control by inspecting personnel.
● Each assembly is in charged by a master who has working experience for more than 20 years
●After all the equipment are completed, we will connect all the machines and run the full production line to ensure the stable running in customers' factory

Our Service
1.We will provide testing if the customer comes to visit factory to see the machine.
2.We will provide detail machine technical specification ,electric diagram,installation,operation manual and all the documents 

   which customer needed for clearing customs and using the machine.
3.We will provide engineers for helping installation and training the workers at customer's site.
4.Spare parts are available when they are needed .Within warranty time,we we will provide spare parts free,and over warranty time,

   we will provide spare parts with factory price.
5.We will provide technical support and repair service in the whole lifetime .

Machine photos

Application examples:

lDrying and crystallizing of PET to 50PPM

lDrying and crystallizing of PLA

lDrying of TPU

lDrying and heating of PE pellets to remove volatiles

lCrystallization of masterbatch in small batches

lDrying and crystallizing of PET for pelletizing or sheet extrusion

lDrying and crystallizing of PLA for pelletizing or sheet extrusion

lDrying and crystallizing of PPS Pellets, amorphous Co-Polyester

lDrying, crystallizing and heating of bulk materials

lPET Masterbatch Crystallization

lPP Masterbatch dryer

lCo-PET Crystallization

lPBT Crystallization

lPEEK Crystallization

lPPS Crystallization

lDrying of plastic granules, and  PET, PBT, ABS/PC, HDPE, LCP, PC, PP, PVB, WPC, TPE, TPU etc.( free-flowing bulk materials)

lRemoval of rest oligomeren and volatile components



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If you have any questions about our products or services, feel free to reach out to customer service team. 
Specializes in post-industrial (in-house) recycling of waste bottle recycling machine line, PE/PP packaging film and PP raffia/woven, plastic dryer providing the most simple, easy-operating recycling system in the market today.

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