Quick Answer
The right plastic dryer depends on your material, throughput requirements, available floor space, and drying needs. Desiccant wheel dryers are commonly used for applications requiring low-dew-point drying, hot air dryers are designed for non-hygroscopic materials, and compressed air dryers offer a compact solution for smaller applications. Understanding your material’s drying requirements is the first step in selecting the right system.
Choosing the right dryer is an important step in plastics processing. The correct drying system can help prepare material for injection molding, extrusion, or blow molding while supporting consistent processing performance and production efficiency.
Because plastic materials have different drying requirements, there is no single dryer that is right for every application. The best choice depends on the material being processed, required throughput, available floor space, drying temperature, dew point requirements, and overall system design.
AEC offers a wide range of dryers for processors handling as little as 5 lb/hr to more than 5,700 lb/hr. Dryer options include desiccant wheel dryers, compressed air dryers, hot air dryers, compact portable units, and large central drying systems.
Why Does the Type of Plastic Material Matter When Choosing a Dryer?
The type of plastic material matters because different materials have different drying needs.
Some materials require low-dew-point drying to remove moisture before processing. Other materials may only require heated air drying.
Hygroscopic materials absorb moisture from the surrounding air and typically require low-dew-point drying before processing. Non-hygroscopic materials generally do not absorb moisture in the same way and often require less intensive drying.
Factors such as whether the material is hygroscopic or non-hygroscopic, the required drying temperature, and the amount of material being processed all influence dryer selection.
Choosing the wrong drying approach can affect production efficiency and material preparation. By selecting the right dryer, processors can help ensure the material is properly conditioned before it reaches the processing machine.
What Types of Plastic Resin Dryers Does AEC Offer?
AEC offers several types of dryers for plastics processing applications, including:
- Desiccant wheel dryers
- Hot air dryers
- Compressed air dryers
- Compact portable drying systems
- Large central drying systems
AEC’s dryer offering includes equipment for small applications as well as systems designed for high-throughput production environments.
How Do Different Plastic Resin Dryer Technologies Compare?
Understanding the differences between dryer technologies can help narrow down your options. Desiccant wheel dryers provide low-dew-point drying for moisture-sensitive materials. Hot air dryers work well for non-hygroscopic materials, while compressed air dryers offer a compact solution for smaller applications. Ultimately, the best choice depends on your material, throughput requirements, drying temperature, and available floor space.
When Should I Use a Desiccant Wheel Dryer?
A desiccant wheel dryer is a strong choice when a plastics processing application requires consistent low-dew-point drying.
AEC developed its AD Series desiccant wheel dryers for plastics processing applications such as injection molding, extrusion, and blow molding. These dryers offer drying temperatures up to 365°F / 185°C and adjustable dew points down to –58°F / –50°C.
Desiccant wheel dryers may be a good fit when your application requires:
- Low-dew-point drying
- High drying performance
- Energy-efficient operation
- Consistent drying control
- Support for injection molding, extrusion, or blow molding
- Reduced maintenance compared to traditional desiccant systems
AEC’s desiccant wheel dryer options include the ADC Series, ADW Series, ADW Compact Series, and ADP Series.
AEC Desiccant Wheel Dryer Options
AEC offers several desiccant wheel dryer configurations to support different processing requirements. Some models mount directly on the drying hopper to save floor space, while others provide integrated conveying or flexible installation options. Each configuration delivers low-dew-point drying while addressing different processing needs.
What Is the ADC Series Desiccant Wheel Dryer?
Processors can position the ADC Series Desiccant Wheel Dryer next to the processing machine as a flexible drying solution.
The ADC Series combines a desiccant wheel dryer with an integrated pneumatic conveying system, a receiver for the drying hopper, a receiver for the injection molding machine, and related accessories.
As a result, processors often choose the ADC Series when they need an independent dryer with integrated conveying capabilities.
Key ADC Series features include:
- Drying temperatures up to 365°F / 185°C
- Adjustable dew points down to –58°F / –50°C
- Integrated pneumatic conveying system
- Material selection table with preset or programmable drying parameters
- Smart Mode for adapting the drying process to production needs
- Material Protection Management to help protect material from overdrying and degradation
- Safety Loading System to help prevent undried material from reaching the production machine
What Is the ADW Series Desiccant Wheel Dryer?
The ADW Series mounts directly on the drying hopper to help save floor space.
For processors with limited floor space, the ADW Series provides desiccant wheel drying performance without taking up unnecessary space around the machine.
The ADW Series includes features such as:
- Dryer installed on the drying hopper
- Drying temperatures up to 365°F / 185°C
- Adjustable dew points down to –58°F
- Adjustable process air flow
- Material selection table with preset or programmable drying parameters
- Smart Mode
- Material Protection Management
- Safety Loading System
When floor space is limited, the ADW Series provides a practical way to achieve desiccant wheel drying performance.
What Is the ADW Compact Series?
Processors often choose the ADW Compact Series for low-throughput applications that require a compact, energy-efficient dryer.
AEC designed the ADW14 and ADW25 models for applications with limited floor space. These models are among the smallest desiccant wheel dryers available and are suitable for small injection molding or extrusion processes, including applications in medical manufacturing.
The ADW Compact Series offers:
- Ultra-compact design
- Throughput capacity from 1–30 lb/hr, depending on material
- Up to 40% energy savings compared to conventional desiccant or compressed air dryers
- Four-stage desiccant wheel conditioning
- Preset or adjustable dew point control
- Small drying hoppers sized to the application
Because of its compact footprint, the ADW Compact Series is a strong option for smaller applications or space-constrained production environments.
What Is the ADP Series Desiccant Wheel Dryer?
Processors install the ADP Series separately from the drying hopper.
This configuration gives processors flexibility when designing their drying and material handling system layout.
The ADP Series includes many of the same desiccant wheel dryer benefits, including:
- Drying temperatures up to 365°F / 185°C
- Adjustable dew points down to –58°F / –50°C
- Adjustable process air flow
- Material selection table with preset or programmable drying parameters
- Smart Mode
- Material Protection Management
- Safety Loading System
The ADP Series may be a good fit when the dryer needs to be installed separately from the hopper as part of a larger material handling setup.
Other Plastic Dryer Technologies
While many processors choose desiccant wheel dryers for moisture-sensitive materials, hot air dryers and compressed air dryers can also provide effective drying solutions. Material requirements, throughput goals, and available floor space often influence which technology makes the most sense.
When Should I Use a Hot Air Dryer?
Processors use hot air dryers to dry non-hygroscopic materials.
AEC’s HA-F Series Hot Air Dryers feature a single blower that provides heated air to dry non-hygroscopic materials. Processors should pair these dryers with an appropriately sized drying hopper.
The HA-F Series offers:
- Process temperatures up to 250°F / 121°C
- Airflow range from 85–2500 CFM
- Compact design
- Low power consumption
- Simple maintenance
- High reliability
- Direct-drive blowers with no belts or sheaves
A hot air dryer may be the right choice when the material does not require low-dew-point drying and the application calls for reliable heated-air drying.
When Should I Use a Compressed Air Dryer?
A compressed air dryer may be a good option for compact drying applications with lower airflow requirements.
AEC’s ACD Series Compact Compressed Air Dryer is designed for 5–15 CFM applications and fits into tight spaces. Processors can mount the ACD Series on the floor or directly to a hopper.
The ACD Series can reduce incoming compressed air source dewpoint by up to 50°F, to as low as –10°F, or –40°F with the optional membrane dryer.
Key ACD Series features include:
- Ultra-compact cabinet
- 5–15 CFM applications
- Average dewpoint of –10°F
- Heating capabilities up to 400°F
- Low compressed air usage
- Floor or hopper-mounted configuration
- 24-hour continuous use
- Automatic shut-off system
In space-constrained applications, compressed air dryers can provide an effective and compact drying solution.
How Does Throughput Affect Dryer Selection?
Throughput is one of the most important factors when choosing a plastic resin dryer.
Throughput refers to the amount of material a dryer can process, typically measured in pounds per hour (lb/hr).
AEC manufactures dryers for applications processing as little as 5 lb/hr to more than 5,700 lb/hr. Smaller applications may require compact portable dryers, while high-volume processing environments may need larger central drying systems.
Before selecting a dryer, processors should understand how much material must be dried per hour and whether the dryer needs to support one machine or multiple processing machines.
Should I Choose a Portable Dryer or a Central Drying System?
The choice between a portable dryer and a central drying system depends on the production environment.
A portable dryer may be a good choice when flexibility is important or when dried material needs to be delivered directly to a single processing machine. Many of AEC’s drying solutions are available as compact portable dryers with integrated conveying.
A central drying system may be better suited for larger facilities that need to support multiple machines or higher overall material throughput.
AEC’s system expertise can help processors plan drying and material handling systems based on their facility layout and production requirements.
Are Drying Hoppers the Same as Dryers?
No. Drying hoppers and dryers are not the same.
A dryer generates and conditions the air used to dry the material. A drying hopper holds the material during the drying process while conditioned air flows through it.
Drying hoppers are important parts of a drying system, but they are not dryers by themselves.
AEC offers different drying hoppers, but they should be understood as supporting equipment used with dryers, not as standalone drying units.
What Questions Should I Ask Before Choosing a Plastic Resin Dryer?
Before selecting a dryer, ask:
- What material am I drying?
- Is the material hygroscopic or non-hygroscopic?
- What drying temperature is required?
- What dew point is required?
- What is the required throughput in lb/hr?
- How much floor space is available?
- Do I need a compact, portable, or central drying system?
- Will the dryer serve one machine or multiple machines?
- Is integrated conveying needed?
- What level of energy efficiency is desired?
These questions can help identify the dryer technology that best fits your application.
Which Dryer Is Right for My Plastic Material?
The right dryer depends on the material, throughput, drying requirements, and production setup.
For applications requiring low-dew-point drying, an AEC desiccant wheel dryer may be the right solution. For non-hygroscopic materials, a hot air dryer may be appropriate. For compact applications with lower airflow needs, a compressed air dryer may be a good choice.
AEC offers a full range of drying solutions, from compact portable units to large central systems, to help processors select the right drying technology for their material and production needs.
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