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IRD Dryer for PET sheet production line

Short Description:

Solution for Drying&Crystallization of PET Regrind flake and virgin resin

Rotation drying system—No segregation of products with different bulk densities

Instant start-up and quicker shut down




  • Drying&Crystallization : In one step
  • Final moisture : ≤50ppm
  • Energy cost: 0.08kwh/kg
  • Drying time : 20mins
  • Machine control: By Siemens PLC

Product Detail

Product Tags

Infrared Crystallization Dryer for PET Sheet Making

Solutions for PET Sheet Making --- Raw material: PET Regrind flake + Virgin resin 


Drying is the single most important variable in the processing.

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.

>>Adopt Rotation drying system to keep sure uniform drying

>>Good mixing without stick or clumping during drying processing

>>No segregation of products with different bulk densities

Energy Consumption

Today, LIANDA IRD users are reporting energy cost as 0.08kwh/kg, without sacrificing product quality.

>>Total process visibility that the IRD system PLC controls make possible

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

>> Widely application

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.


Advantage we Make

 Limiting the hydrolytic degradation of the viscosity.

 Prevent increasing AA levels for materials with food contact

 Increasing the capacity of the production line up to 50%

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


→ Reduce manufacture cost of PET sheet: Up to 60% less energy consumption than conventional drying system

→ Instant start-up and quicker shut down --- No need pre-heating

→ Drying& crystallization will be processed in one step

→ To improve the tensile strength of PET sheet,Increase the added value --- Final moisture can be ≤50ppm by 20mins Dry &Crystallization

→ The machine line is equipped with Siemens PLC system with one key memory function

→ Covers an area of small, simple structure and easy to operate and maintenance

→ Independent temperature and drying time set  

→ No segregation of products with different bulk densities

→ Easy clean and change material  

Machine Running in Customers' factory



Q: What’s the final moisture you can get ? Do you have any limitation on initial moisture of the raw material ?

A: The final moisture we can get ≤30ppm (Take PET as example). Initial moisture can be 6000-15000ppm.


Q: We use Double parallel screw extruding with vacuum degassing system for PET Sheet extrusion, shall we still need to use pre-dryer?

A: We suggest to use Pre-dryer before extrusion. Usually such system has the strict requirement on initial moisture of PET material. As we know PET is kind of material which can absorb the moisture from atmosphere which will cause the extrusion line working badly. So we suggest to use pre-dryer before your extrusion system:

>>Limiting the hydrolytic degradation of the viscosity

>>Prevent increasing AA levels for materials with food contact

>>Increasing the capacity of the production line up to 50%

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


Q: We are going to use new material but we don’t have any experience for drying such material. Can you help us?

A: Our factory has Test Center. In our Test center, we can perform continuous or discontinuous experiments for customer’s sample material. Our equipment is furnished with comprehensive automation and measurement technology.

We can demonstrate --- Conveying/Loading, Drying& Crystallization, Discharging.

Drying and crystallization of material to determine residual moisture, residence time, energy input and material properties.

We can also demonstrate performance by subcontracting for smaller batches.

In accordance with your material and production requirements, we can map out a plan with you.

Experienced engineer will make the test. Your employees are cordially invited to participate in our joint trails. Thus you have both the possibility to contribute actively and the opportunity to actually see our products in operation.

Q: What’s the delivery time of your IRD?

A: 40 working days since we get your deposit in our company account.

Q: How about the installation of your IRD?

Experienced engineer can help installation the IRD system for you in your factory. Or we can supply guide service on line. The whole machine adopt aviation plug, easier for connection.

Q: What’s the IRD can be applied for ?

A: It can be pre-dryer for

  • PET/PLA/TPE Sheet extrusion machine line
  • PET Bale strap making machine line
  • PET masterbatch crystallization and drying
  • PETG Sheet extrusion line
  • PET monofilament machine, PET monofilament extrusion line,PET monofilament for broom
  • PLA /PET Film making machine
  • PBT, ABS/PC, HDPE, LCP, PC, PP, PVB, WPC, TPE, TPU, PET (Bottleflakes, granules, flakes), PET masterbatch, CO-PET, PBT, PEEK, PLA,PBAT, PPS etc.
  • Thermal processes for the removal of rest oligomeren and volatile components.


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