Infrared Crystallization Dryer for PET Preforms making

Short Description:

Solutions for the manufacturing of qualitative preforms and bottles made of PET virgin and R-PET resins

Drying&Crystallization : In one step
Final moisture : ≤50ppm
Energy cost: 0.06kwh/kg
Drying time : 20mins
Raw material of Bottle Preform making : can be 100% rPET

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Infrared Crystallization Dryer for PET Preforms making

Solutions for the manufacturing of qualitative preforms and bottles made of PET virgin and R-PET resins

Drying is the single most important variable in PET preform processing.

If drying procedures are not meticulously followed and residual moisture remains above 0.005％(50ppm)，the material will undergo a chemical change during melt processing, losing intrinsic viscosity (IV) and physical properties.

LIANDA has been working closely with resin suppliers and processors to develop equipment and procedures that can eliminate moisture-related quality issues while saving energy too.

1) Energy Consumption

Today, LIANDA IRD users are reporting energy cost as 0.06kwh/kg, without sacrificing product quality.

2) Total process visibility that the IRD system PLC controls make possible

3) To achieve 50ppm only IRD is enough by 20mins Drying&crystallization in one step

4) Widely application

IRD adopt rotary drying system--- very good mixing behaviour of the material+ Special program design (Even stick resin can be dried well and even crystallization )

Infrared Crystallization Dryer for PET Preforms making2

How to Work

>>At first step, the only target is to heat up the material to a preset temperature.

Adopt relatively slow speed of drum rotating, the Infrared lamps power of the dryer will be at a higher level, then the plastic resin will have a fast heating till the temperature rises to the preset temperature.

>>Drying &Crystallizing step

Once the material gets to the 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 drying&crystallization. Then the drum rotating speed will be slowed down again. Normally the drying &crystallization process will be finished after 15-20mins. (The exact time depends on the property of material)

>>After finishing the drying&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.