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PLASTIC DRYING AND DEHUMIDIFICATION EQUIPMENT

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Used Drying Equipment for Plastics Processing

At Gester, we offer a selection of used plastic resin dryers, drying hoppers and dehumidifying systems for plastics processing applications. Our second-hand equipment provides a cost-effective solution for manufacturers that need reliable drying performance without the investment required for new machinery.

Plastic materials must often be dried before injection moulding, extrusion or blow moulding. Excess moisture can cause bubbles, surface defects, loss of mechanical strength and inconsistent production results. Choosing the right plastic dryer helps maintain the correct moisture level and improves the quality of the finished product.

Browse our available machines or contact our team to request technical specifications, prices and current availability.

Plastic Resin Dryers for Different Materials

Many thermoplastic resins absorb moisture from the surrounding air. These materials are known as hygroscopic plastics and usually require controlled drying before processing.

A plastic resin dryer removes moisture from plastic pellets before they enter the production machine. Depending on the material and application, the drying process may require controlled temperature, airflow, drying time and dew point.

Plastic dryers can be used for materials such as:

  • PET
  • PA or nylon
  • PC
  • ABS
  • TPU
  • PMMA
  • PBT
  • Other hygroscopic polymers

Correct drying conditions depend on the type of resin, the initial moisture level and the required production capacity.

Types of Plastic Drying Equipment

Our inventory may include different types of drying equipment for plastics, suitable for individual machines or centralised production systems.

Dehumidifying and Desiccant Dryers

Dehumidifying dryers use low-dew-point air to remove moisture from hygroscopic plastic resins. They are commonly used when standard hot-air drying is not sufficient.

These systems can provide more stable drying conditions by controlling:

  • Air temperature
  • Airflow
  • Dew point
  • Drying time
  • Hopper capacity

Desiccant dryers are frequently used for PET, nylon, polycarbonate and other moisture-sensitive materials.

Hot-Air Hopper Dryers

Hot-air hopper dryers heat the material while it is stored in a hopper. The continuous airflow helps reduce surface moisture and keeps the plastic pellets at the required processing temperature.

A hopper dryer can be mounted directly on an injection moulding or extrusion machine, helping maintain a consistent material supply during production.

These machines are often suitable for non-hygroscopic materials or applications where intensive dehumidification is not required.

Central Plastic Drying Systems

A central plastic drying system can supply dried material to several processing machines from a single installation. These systems may combine dehumidifying units, drying hoppers, material loaders and conveying equipment.

Central systems can help manufacturers:

  • Manage several materials simultaneously
  • Reduce manual material handling
  • Improve process control
  • Maintain consistent drying conditions
  • Supply multiple production lines

The most suitable configuration depends on production volume, material type and the number of processing machines.

Benefits of Buying Used Plastic Dryers

Purchasing a second-hand plastic dryer can reduce the cost of upgrading or expanding a plastics processing line.

Used equipment can offer several advantages:

  • Lower initial investment
  • Faster availability compared with new machinery
  • Access to established industrial brands
  • Suitable solutions for temporary or additional production capacity
  • Reduced depreciation costs

Before purchasing a used plastic material dryer, it is important to check its specifications and confirm that it is compatible with the material and production process.

How to Choose a Used Plastic Dryer

The correct plastic dryer should be selected according to the technical requirements of the application.

Important factors include:

Material type

Different plastic resins require different drying temperatures, drying times and dew-point levels.

Production capacity

The dryer must be able to process enough material to supply the production machine continuously. Capacity is normally expressed in kilograms per hour.

Hopper capacity

The hopper must provide sufficient residence time for the material to dry correctly before processing.

Drying temperature

The operating temperature must be compatible with the resin to avoid incomplete drying or material degradation.

Dew point

Hygroscopic materials often require dehumidified air with a controlled low dew point.

Airflow

Correct airflow ensures that the heated or dehumidified air passes evenly through the plastic pellets.

Electrical requirements

Voltage, frequency, power consumption and connection requirements must be compatible with the installation.

Machine dimensions

The dryer, hopper and associated equipment must fit within the available production area.

Our team can help you review the available equipment and identify a machine that matches your production requirements.

Used Plastic Dryers Available from Gester

Our stock changes regularly and may include:

  • Plastic resin dryers
  • Desiccant dryers
  • Dehumidifying dryers
  • Hot-air hopper dryers
  • Drying hoppers
  • Central drying systems
  • Material drying and conveying equipment
  • Auxiliary equipment for plastics processing

Each available machine may differ in brand, model, year, capacity, power and condition. Contact us for updated information about the equipment currently in stock.

Request Information About Our Plastic Drying Equipment

Looking for a specific plastic dryer, drying hopper or dehumidification system?

Send us your required material, production capacity and preferred specifications. We will help you check the available second-hand machinery and find a suitable solution for your plastics processing line.

Contact Gester to request technical details, photographs, price and availability.

We recommend you to get to know our pneumatic and hydraulic pistons and our cooling machines.

Frequently Asked Questions

What is a plastic dryer used for?

A plastic dryer is used to remove moisture from plastic resins before processing, helping to prevent defects such as bubbles, poor surface finish and reduced mechanical strength.

Why is moisture control important in plastic processing?

Excess moisture can negatively affect product quality, causing imperfections during extrusion, injection moulding and other plastic manufacturing processes.

What is a drying hopper?

A drying hopper is a container that stores plastic material while hot air circulates through it, ensuring uniform drying before processing.

How does a desiccant dryer work?

Desiccant dryers use special moisture-absorbing materials to remove humidity from the drying air, allowing plastic resins to reach very low moisture levels before processing.

Which plastic materials require drying?

Many hygroscopic plastics such as PET, PA, PC, ABS and certain engineering polymers require drying before processing to achieve optimal results.

What are the benefits of using drying hoppers?

Drying hoppers help maintain consistent material quality, improve production efficiency, reduce defects and ensure a stable material feed to the processing machine.

Can drying hoppers be integrated with extrusion and injection moulding machines?

Yes. Drying hoppers are commonly installed above extruders, injection moulding machines and other plastic processing equipment to ensure continuous material supply.

What are the advantages of buying used plastic dryers?

Used plastic dryers provide a cost-effective solution, allowing manufacturers to reduce investment costs while still benefiting from reliable drying equipment.

How do I choose the right plastic drying system?

The selection depends on factors such as material type, required throughput, moisture specifications, hopper capacity and compatibility with existing production equipment.

Why buy plastic dryers and drying hoppers from Gester?

Gester offers reliable second-hand drying equipment, technical advice and a wide selection of plastic dryers and drying hoppers suitable for extrusion, recycling and injection moulding applications.

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