Yushine-Plastic Resin Dryer

Plastic resin dryers are crucial for drying resin pellets in the plastic industry. Yushine provides a host of dryers that meet this industry’s needs. Our solutions are compact and portable, with integrated conveyors that can transfer dried materials into processing machines.

We supply three main types of plastic resin dryers: desiccant air dryers, hot air dryers, and insulated dryers. Which one is used depends on what kind of material will be dried, temperature settings, environmental conditions, and final product quality requirements. The market offers a vast selection of dryers, but our desiccant, hot air and insulated ones are preferred for their simplicity and efficiency. The desiccant dryer is highly versatile. It can handle different production throughputs and dries engineering plastics, commodity plastics, and highly moisture-sensitive hygroscopic resins.

Our versatile dryers can be directly mounted on the processing machine or installed independently on a stand. They can also be incorporated into a comprehensive drying system setup.

Customized options are also available, depending on your detailed requirements. Please contact us for more assistance.

Hot Air Dryer

The hot air dryer for plastic processing, the standard hopper dryer, is the most economical and widely used dryer model. It features temperature control settings with a maximum temperature capability of 180 degrees Celsius.

Desiccant Air Dryers

The desiccant air dryer, also known as a desiccant wheel resin dryer, is designed to remove moisture from plastic resin. It utilizes a desiccant wheel—a rotating drum filled with a desiccant material, typically molecular sieves—to dry the resin effectively.

Insulated Dryer

The insulated hopper dryer, also called the durable Drying Hopper with Insulated Walls, operates using “down-blowing” and “cyclonic exhausting” principles. Its double-layered construction enhances heat preservation, while its unique, compact design promotes mass flow, making it highly effective for drying processes.

Highlights of Plastic Resin Dryer

Efficient and Fast
High-Efficiency

High-efficiency, Energy-Saving Dryers with Overheat Protection and Unique Airflow Design for Even Heat Distribution and Optimal Drying Performance

Superior SUS304 Materials
Smart Control System

Equipped with advanced microcomputer LCD controllers featuring 24-hour and weekly timers, Optional Rs485 communication supports smart factory integration. Includes world-class electrical components.

Safe
Efficient User Design

Features a humanized design with a stainless steel hopper and inspection window, side glass on the material tank for easy monitoring, and a low-noise, efficient copper blower that provides ample heating energy.

Cost-Effective
Advanced Safety Features

It features low maintenance, an alert protection system, an emergency stop switch, and malfunction lights. The compact design includes a mobile cart option for enhanced portability.

Resin Dryers for Various Plastics

When choosing a resin dryer, consider the following factors to ensure the dryer meets the specific needs of the plastic resins being processed and operates efficiently.
1. Types of Resin Dryers
Hot Air Dryers: These dryers work well with non-hygroscopic plastics like polyethylene (PE) and polypropylene (PP). They effectively remove surface moisture.
Desiccant Dryers: Desiccant dryers should be used for hygroscopic plastics such as nylon, polyethylene terephthalate (PET), and polycarbonate (PC) that tend to reabsorb moisture. These dryers can reach very low dew points to remove moisture trapped inside the plastic.
2) Material properties
Hygroscopic Plastics: Materials like nylon, PET, PC, and ABS that can reach the low dew points required to remove internally bound moisture effectively.Non-Hygroscopic Plastics: Hot air dryers designed to eliminate only surface moisture will benefit PP and PE, among other non-hygroscopic resins.

 

 

 

Resin Dryers for Various Plastics
Relevance to Resin Dryer Selection

Relevance to Resin Dryer Selection

Selecting a resin dryer itself is one of the major aspects to consider, specifically designed for efficient and safe drying of plastic resins. These factors focus on optimizing the performance of the drier with different types of plastics. The following are summaries.
1. Dew Point
Hygroscopic plastics like PET or Nylon absorb moisture, impacting mechanical properties and aesthetics if not adequately dried. Adequate dehumidification ensures water removal during drying without reabsorption into the resin.
2. Air Flow
Consistent, controlled airflow inside the material batch ensures uniform drying. Different materials may need adjustable airflow rates, and some batches might be too small for certain areas, risking over-drying.
3. Temperature Control
Different plastics have different optimal drying temperatures. At high temperatures, sensitive plastics may decompose, so accurate temperature control is necessary. Correct temperature settings in resin dryers reduce thermal degradation risks and uphold quality control for end products.
4. Capacity
Undersized dryers can’t handle production volumes; oversized ones waste energy. Matching capacity to demand boosts efficiency.

Why Choose Yushine Plastic Resin Dryers

Product Detailes
Why Choose Yushine Plastic Resin Dryers

Yushine plastic resin dryer provides a comprehensive range of plastic resin dryers for the plastic industry and is widely used in many factories. With the popularity of energy-saving injection molding machines, the Yushine hopper drying machine has developed and applied a dual-efficient and long-lasting drying system for many years and can save energy by 20% -40% compared with traditional systems. This system does not overheat due to blower failure, so it is safer and more reliable without potential damage.
The Yushine Honeycomb Dehumidifying Dryer Machine is a versatile solution for dehumidifying various materials, especially high-hygroscopic plastics like PA, PC, PBT, and PET. Available in semi-closed or fully closed designs Compact design with dehumidifier, dryer, and loaders, especially for high request materials, such as TPU for medical, new energy, which could dry and directly load seamlessly without air exposure, avoiding secondary contamination.

Choose Yushine for efficient, reliable resin drying solutions.

Working Principle of Desiccant Dryer

Working Principle of Dehumidifying Dryer that Uses Molecular Sieves in a Rotating Wheel
The main part of this dryer is the ceramic fiber paper wheel which can endure temperatures over 500 °C. A honeycomb arrangement is given to the wheel, then filled with molecular sieves rather than conventional silica gel; this modification makes it work better for dehumidification while keeping it safe from combustion or melting. Good moisture-absorbing material should have been selected for physical adsorption, such as molecular sieves, since they do not react chemically, thus making them environmentally friendly and highly efficient in terms of process performance, too.

Installation Schematic Diagram

To boost functionality further, we also offer a variety of optional features, such as:
Dew Point Monitors, which help control moisture levels accurately for the most favorable operational settings.
Touchscreen Controllers: These simplify operations while giving precise control over every function.
Suction Boxes: They make material handling more efficient
Hopper Loaders: Automatic materials loading becomes possible with these; hence, workflow and productivity improve.

Plastic Auxiliary Equipment Manufacturer

More About YuShine Plastic Resin Dryer

Three-in-One Structure Diagram
Three-in-One Structure Diagram
ModelDimension HxWxD(mm)Weight(KG)Process Blower(kw)Drying Heater(kw)Regeneration Blower(kw)Regeneration Heater(kw)
SD-40H1260X510X8601450.1240.44
SD-80H1360X530X(8201700.7560.43
SD-120H1360*530*8201700.7560.43
SD-200H1560*660*10502651.5120.44
SD-400H1560*660*10503303.75180.757.2
SD-700H1935*900*13804807.5241.510
SD-1000H2145*1300*155070013323.7515
SD-15002060x1410x212010109*2587.528
SD-2000H2060X1410X21510130013*2807.528
SD-3000H2240X2035X2160160013*396932
SD-4000H2060X2750X2250220013*41285.5*256
Weight(KG)Heating Power(kW)Process Blower(kW)Capacity(kg)
403.3/3*0.1225
453.9/4.2*0.1250
554.2/4.8*0.1275
706/6.6*0.12100
756.6/7.2*0.12150
1008.4/9.6*0.18200
1209.60.18300
165180.55400
17019.20.55500
240210.55600
280241.1800
300321.11000
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What are the Challenges and Drawbacks of Compressed Air Dryers in Resin Processing

Compressed air dryers are straightforward and low-maintenance; the following are the several  significant  drawbacks:
First, lts dew point couldn’t be higher than-40degrees Fahrenheit, while its range is between-10   and +10 degrees Fahrenheit.
Second, because the drying process is not always uniform, part rejection may occur, and sometimes, the dryer may be shut down intermittently.
Third, they have a low throughput capacity of about 50 pounds per hour. In addition, compressed air dryers are less cost-effective and, therefore, consume more energy dried resins.This limits the use of dehumidifiers for compressed air in a straight line. However, they don’t always provide the best efficiency or performance when used at various working conditions.

 

How does a Desiccant Wheel Dryer operate, and what are its main advantages?

A rotating desiccant wheel containing materials like silica gel or molecular sieves removes moisture from plastic resin. In contrast, Yushine’s desiccant wheel dryer uses molecular sieves to remove moisture from plastic resin. The drying section involves pulling moist air through the wheel, absorbing moisture, and heating the dried air as it passes over the resin. In this stage, ambient air is heated to remove moisture from the desiccant and reuse it in a new cycle.

Main Advantages Include:

Less Energy Consumption: It uses less electricity than other machines, which makes it economical.

Minimal Footprint Size: It uses a crystalline pure desiccant, so less metal surface area needs to be heated, reducing its footprint by as much as 75%.

Consistent Operation: The continuous rotation of the desiccant wheel ensures no temperature fluctuation or dew point variations, eliminating the need for “Change.”

Low Maintenance Costs: With more advanced controls available for easy troubleshooting, low maintenance is needed due to design and operation simplicity.

Constant Dew Point: This dryer maintains a -40° dew point throughout for improved efficiency.

Such features make the desiccant wheel dryer highly effective and reliable for drying resins, especially under changing humidity conditions.

Why is it important to know the initial moisture content of plastic pellets?

Water can undermine the structural integrity and overall quality of finished products. Pellet moisture, whether superficial or molecular, can result in melting issues such as hydrolytic degradation, leading to substandard outputs. There are two types of moisture that may exist within a plastic pellet: surface and bound moisture. Bound moisture is difficult to remove since it goes into the pellets at the molecular level.

How to Install a Regenerative Desiccant Air Dryer?

Here are the concise installation steps for the desiccant dryer:

Step 1: Connect the Inlets and Outlets

Attach the water inlets and outlets on the right side.

Step 2: Install the Vacuum Hopper

Place the vacuum hopper on top of the dehumidifier and secure it with a gasket.

Connect the hopper’s signal line to Position Indicator No. 1.

Step 3: Install the Vacuum Hopper Pipelines

Short Pipe Installation:

Connect one end to the upper outlet of the vacuum hopper.

Attach the other end to Directional Valve No. 1.

Long Pipe Installation:

Connect one end to the lower outlet of the vacuum hopper.

Attach the other end to the suction gun.

Step 4: Install the Sensor Hopper

Connect the sensor hopper’s signal line to Position Indicator No. 2.

Connect the feed pipe, one end to Port No. 2, the other to the top of the sensor hopper.

Step 5: Connect the Third Long Pipe

One end to Port No. 3 on top of the dehumidifier.

The other end is to the outlet below the photo-eye hopper.

These steps will ensure a proper setup of your dehumidifying dryer. Ensure all connections are secure before use.

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