In the plastics processing and recycling sectors, PET (Polyethylene Terephthalate) is a widely used material. However, its strong hygroscopicity can lead to quality degradation when the material is dried or processed improperly. The Wensui PET Crystallizer is a core pre-treatment equipment for PET materials. The crystallizer is designed to significantly improve the drying efficiency and regeneration quality, making it an indispensable part of plastic production lines.

What is a Crystallizer?

A crystallizer is a device that induces crystallization in PET materials through precise temperature control. PET pellets in their natural state are mostly amorphous and prone to moisture absorption, which causes clumping and affects subsequent melting processes. The crystallizer heats and gradually cools PET pellets or regrinds, enabling molecular chains to align into an orderly crystalline structure. This enhances moisture resistance and thermal stability.

How Does a Crystallizer Work?

The crystallizing system converts amorphous PET raw material pellets into a crystalline state for drying, enabling high-temperature drying to achieve low-moisture feedstock without concerns about clumping. It consists of a high-temperature heat source, an insulated hopper with an agitator, and a rotary discharge valve. It can be easily integrated with other material handling equipment.

Functions & Importance in PET Drying

Untreated PET pellets entering a dryer directly may soften and stick together, leading to uneven drying or poor hot air penetration. This ultimately affects the injection molding quality

Wensui PET Crystallizer

Wensui’s crystallizer delivers three key advantages:

1. Reduced Moisture Absorption: Crystallized PET absorbs far less moisture, shortening drying time.
2. Enhanced Heat Resistance: The crystalline structure prevents deformation during high-temperature drying (e.g., 180°C).
3. Lower Energy Consumption: Drying efficiency increases by 30%, reducing overall energy use by 20%.

Features of PET crystallizer

1. Hopper with blender prevents lump and deformation.
2. Constant agitation and orientation pole prevent agglomeration.
3. Automatically monitors hopper temperature to ensure continuous and reliable output of crystallized material.
4. Processed material can be discharged or stored.
5. Material tank is equipped with door, and blender is detachable, both of which are easy to access and clean.