Pre-crystallization and dryer for PET chips/scraps/pellets for PET
/PLA Sheet extrusion machine line
Field of applications.
Heating.Heating granules and regrind material prior to further processing
(e.g. PVC, PE, PP,…) inter alia to improve the throughput in the
Crystallization.Crystallisation of PET (Bottleflakes, granules, flakes), PET
masterbatch, co-PET, PBT, PEEK, PLA, PPS, etc.
Drying.Drying of plastic granules, and –ground material (e.g. PET, PBT,
ABS/PC, HDPE, LCP, PC, PP, PVB, WPC, TPE, TPU) as well as other
free-flowing bulk materials.
Coating.Coating of adhesives (e.g. Hot melt, EVA+lime,…)
High input moisture.Drying processes with high input moisture >1%.
Diverse.Thermal processes for the removal of rest oligomeren and volatile
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 Infrared crystal dryer in 20mins, the drying temperature will be 150-180℃ and dried to
50-70ppm,then fed to Single screw extruding system for further
l Limiting the hydrolytic degradation of the viscosity.
l Prevent increasing AA levels for materials with food contact
l Increasing the capacity of the production line up to 50%
l Improvement and make the product quality stable-- Equal and
repeatable input moisture content of the material
1. Material Filling
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
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.
|Transfer medium||None||Hot air|
|Heat transfer||Both inside & outside particles together.||From outside to inside particle gradually.|
|Energy||Save at least 20~50% energy compared to traditional dryer.||Consume much energy.|
|Process time||1. Crystallization & drying: They are processed simultaneously
within about 8~15 minutes.|
2. Drying and crystallization at a time
|1. Crystallization: About 30~60 minutes.|
2. Drying: About 4~6 hours.
|Moisturecontent||1. Under 50-70 PPM after IRD processed.||1. Spend 30~60 minutes to change amorphous PET to crystallized PET
2. Under 200PPM after about 4 hours dehumidifier processed.
3. Under 50 PPM after about more than 6 hoursdehumidifier
|Lead time||20mins||More than 6 hours.|
|Material changeover||1. Easy & faster.|
2. There are only 1~1.5 times capacity of material hourly
consumption in the buffer hopper.
|1. Difficult & slowly.|
2. There are 5~7 times capacity of material hourly consumption in
the crystallizer & hopper.
Simple--- By Siemens PLC control
|It is difficult such as it must put a little crystallized PET in
the crystallizer when beginning operation.|
2. Lower maintenance cost.
2. Higher maintenance cost.
|pprox. power consumption||A-PET||0.08 KW / KG,HR (Crystallization only)|
|C-PET||0.12 KW / KG,HR (Drying only)|
|FLAKE||0.20 KW / KG,HR (Crystallization & drying)|
HOW TO ENSURE THE QUALITY!
● 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
● 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
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