PLA dry and crystallization by Infrared crystal dryer

Materials before and after treatment:

PLA is kind of very sensitive temperature material. PLA is a hygroscopic thermoplastic that easily absorbs water from the atmosphere.

Even small amounts of moisture will hydrolyze PLA in the melt phase, reducing molecular weight and causing loss of properties. This can cause sheet brittleness, internal holes, sagging of the web at the die exit, or other process and quality problems. With PLA, proper drying is not optional. It is absolutely essential. Resin manufacturers recommend that PLA be dried less than 250 ppm before processing. In fact, moisture levels below 200 ppm may be needed in order to ensure a reasonable safety margin and, in some cases, moisture levels below 50 ppm are recommended.

Using Infrared Crystal Dryer

• Crystallization and drying in one process step
• Drying and crystallization time
• Final moisture can be 200ppm or 50ppm ( by customers’ requirement)
• Drying temperature and drying time can be adjustable by material requirement
• Save about 40% energy consumption compared to conventional dehumidifier
• Excellent rotating properties will prevent PLA clumping during the processing
• Easy clean
• Capacities can be 100kg/h to 2500kg/h

Application examples:

• Drying and crystallizing of PLA to 50PPM
• Drying and crystallizing of PLA
• Drying of PLA
• PLA Dryer
• PLA Crystallizer
• Crystallization of masterbatch in small batches
• Drying and crystallizing of PET for pelletizing or sheet extrusion
• Drying and crystallizing of PLA for pelletizing or sheet extrusion
• Drying and crystallizing of PPS Pellets, amorphous Co-Polyester
• Drying, crystallizing and heating of bulk materials
• PET Dehumidifier and crystallizer

Pictures for reference:

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