PET Masterbatches crystallization by Infrared crystal dryer

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PET Masterbatches crystallization by Infrared crystal dryer



IRD Technology are often used in PET Application such as Thermoforming sheet, Strapping, Cast film and recycling production

Lianda has designed 2 types of Infrared crystal dryer to satisfy different customers’ requirement on the crystallization of PET Masterbatch. One is Continuous LIANDA IRD which can satisfy the companies who run rather large capacity of plastic masterbatches and don’t change the color very often. Another is Batch Lianda IRD which can satisfy the companies who run smaller capacity like 80-200kg/h with frequent color change. Such type design supply the proper and sufficient cleaning as well as quick start up times.

The ADVANTAGES of IRD crystallize PET color masterbatch


Infrared Crystal Dryer

Conventional Crystallizer

1

Easy to clean and change color

The drum can be opened completely,no hidden spots and can be cleaned easily with a vacuum cleaner

Have to be completely disassembled,cleaned and fixed

2

Rotary drying system, its rotating speed can be increased as high as possible to get an excellent mixing of pellets. It is good in agitation, the masterbatch will not be clumped

Poor agitation,easy to be clumped

3

Can satisfy different type of Masterbatch (Drying temperature and time can be adjustable by the property of raw material)

The drying temperature is fixed

4

Crystallization time 15-20mins depends on the material kind

Need 2 hours or more

5

Energy consumption of Infrared dryer is only 1/3 of Convention crystallizer



How Lianda Infrared dryer to crystallize PET Masterbatch ?

1. Working processing of Masterbatch Infrared dryer




Processing Explanation

1) At first step, the only target is to heat up the material to a presettemperature.
Adopt relatively slow speed of drum rotating, the Infrared lamps power of the dryer will be at a higher level, then the PET Masterbatch will have a fast heating till the temperature rises to the preset temperature
2) Crystallization step
Once the material gets to the critical crystallization temperature, the speed of the drum will be increased to a much higher rotating speed to avoid the clumping of the material. At the same time, the infrared lamps power will be increased again to finish the crystallization. Then the drum rotating speed will be slowed down again. Normally the crystallization process will be finished after 15-20mins. (The exact time depends on the property of material)
3) After finishing the crystallization processing, the IR Drum will automatically discharge the material and refill the drum for the next cycle

The automatic refilling as well as all relevant parameters for the different temperature ramps is fully integrated in the state-of-the-art Touch Screen control. Once parameters and temperature profiles are found for a specific material, theses settings can be saved as recipes in the control system.



Plastic IRD Dryer/ Infrared dryer Model

Model Number

IRD-80

IRD-200

IRD-300

IRD-500

IRD-1000

Output/Capacity

KG/H

80-120

200

300

500

800-1000

Installation Heating power

KW

18

27

36

48

90

Drying time

Normally 20mins

And the drying time can be adjustable by PLC on customer’s requirement on final moisture

Control

By Siemens Touch Screen PLC system

Processing

Dehumidifier and crystallized at a time

Final moisture

50-70ppm

Heating way

Infrared lamps

Energy saving

Up to 45%

Space saving

Up to 300%

Operation

Faster to start up

Quick change-over and shutdown time



Machine photos




Application examples:

●    Drying and crystallizing of PET to 50PPM

●    Drying and crystallizing of PLA

●    Drying of TPU

●    Drying and heating of PE pellets to remove volatiles

●    Crystallization of masterbatch in small batches

●    Drying and crystallizing of PET for pelletizing or sheet extrusion

●    Drying and crystallizing of PLA for pelletizing or sheet extrusion

●    Drying and crystallizing of PPS Pellets, amorphous Co-Polyester

●    Drying, crystallizing and heating of bulk materials







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