PET (polyethylene terephthalate) is a widely used plastic material for making preforms and bottles for various applications, such as beverages, food, cosmetics, pharmaceuticals, and household products. PET has many advantages, such as transparency, strength, recyclability, and barrier properties. However, PET is also highly hygroscopic, meaning it absorbs moisture from the air and environment. This moisture can cause various problems during processing and application, such as degradation, discoloration, bubbles, cracks, and reduced strength. Therefore, it is essential to dry PET before processing to ensure optimal quality and performance.
LIANDA MACHINERY, is a globally recognized plastic recycling machine manufacturer who specializes in waste plastic recycling machine and plastic dryer. Since 1998, LIANDA MACHINERY has been producing plastic recycling machines that are simple, easy, and stable for plastic producers and recyclers. More than 2,680 machines have been installed in 80 countries, including Germany, UK, Mexico, Russia, America, Korea, Thailand, Japan, Africa, Spain, Hungary, Columbia, Pakistan, Ukraine, etc.
One of the products that LIANDA MACHINERY offers is the Infrared Crystallization Dryer for PET Preforms making, a solution for the manufacturing of qualitative preforms and bottles made of PET virgin and R-PET resins. The Infrared Crystallization Dryer for PET Preforms making is designed to dry and crystallize PET in one step, achieving a final moisture content of ≤50ppm. The Infrared Crystallization Dryer for PET Preforms making uses a rotary drying system that ensures uniform crystallization, good mixing, and no clumping. The Infrared Crystallization Dryer for PET Preforms making also has accurate temperature control and quick drying time, preventing yellowing and degradation of PET.
The Infrared Crystallization Dryer for PET Preforms making has the following features:
• Drying and crystallization in one step: The dryer can dry and crystallize PET in one step, saving time and energy. The dryer can also handle 100% R-PET, making it suitable for recycling applications.
• Final moisture ≤50ppm: The dryer can achieve a final moisture content of ≤50ppm, which is the optimal level for PET processing. This prevents hydrolytic degradation of the viscosity and increasing AA levels for materials with food contact.
• Energy cost 0.06kwh/kg: The dryer has a low energy consumption of 0.06kwh/kg, which is up to 60% less than conventional drying systems. This reduces the operating cost and environmental impact of the dryer.
• Drying time 20mins: The dryer has a fast drying time of 20mins, which is much shorter than conventional drying systems. This increases the capacity of the production line up to 50% and improves the product quality and stability.
• Rotary drying system: The dryer adopts a rotary drying system, which ensures a very good mixing behavior of the material and a special program design. Even sticky resin can be dried well and evenly crystallized. The rotary drying system also prevents segregation of products with different bulk densities and pellets clumping and stick.
• Independent temperature and drying time set: The dryer has an independent temperature and drying time set, which allows users to adjust the parameters according to the different properties and requirements of the material. The dryer also has a state-of-the-art Touch Screen control, which provides total process visibility and allows users to save different settings and recipes for different materials.
• Easy clean and change material: The dryer has an easy clean and change material feature, which makes it convenient and efficient for users to switch between different materials and colors. The dryer also has an automatic refilling and discharging feature, which simplifies the operation and maintenance of the dryer.
• Careful material treatment: The dryer has a careful material treatment feature, which ensures that the material is not damaged or degraded during the drying and crystallization process. The dryer also has a 360-degree shielding EMC protection, which minimizes electromagnetic interference and ensures a stable connection.
The Infrared Crystallization Dryer for PET Preforms making works as follows:
• At the first step, the only target is to heat up the material to a preset temperature. The dryer adopts a relatively slow speed of drum rotating, and the infrared lamps power of the dryer will be at a higher level. Then the plastic resin will have a fast heating until the temperature rises to the preset temperature.
• Once the material reaches 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 and crystallization. Then the drum rotating speed will be slowed down again. Normally, the drying and crystallization process will be finished after 15-20 minutes. (The exact time depends on the property of the material)
• After finishing the drying and crystallization process, 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.
The Infrared Crystallization Dryer for PET Preforms making is suitable for a wide range of applications, such as:
• Injection molding: The dryer can dry PET for injection molding, ensuring high-quality preforms and bottles with smooth surfaces, accurate dimensions, and consistent properties.
• Extrusion: The dryer can dry PET for extrusion, producing uniform and stable products with excellent mechanical and thermal properties.
• Blow molding: The dryer can dry PET for blow molding, creating hollow products with high strength and durability.
• 3D printing: The dryer can dry PET for 3D printing, enabling complex and precise shapes with high resolution and accuracy.
Overall, the Infrared Crystallization Dryer for PET Preforms making is a solution for the manufacturing of qualitative preforms and bottles made of PET virgin and R-PET resins. LIANDA MACHINERY is proud to offer this product to its customers, along with a wide range of plastic recycling machines and plastic dryers.
For more information, please contact us:
WhatsApp: +86 13773280065 / +86-512-58563288
article source: https://www.ld-machinery.com/news/infrared-crystallization-dryer-for-pet-preforms-making-properties-and-performance/