Cheyoe Group: Teach you how to choose a high-quality chill roller!

In the BOPP film production line, the chill roller is usually installed in the casting system. It needs to quickly cool the BOPP melt flowing out of the die head to below its glass transition temperature to form a glassy and uniformly thick casting sheet. At the same time, the thick sheet is made into an amorphous structure to minimize crystallization and avoid adverse effects on the subsequent stretching process.

It can be seen that it is very necessary to choose a high-quality chilled roller. So how should we choose? Perhaps the following methods can help you:

1. Cooling performance: A chill roller with a reasonable internal flow channel design should be selected, such as a cross spiral flow channel, which can control the temperature difference within a small range, such as plus or minus 0.5 degrees. At the same time, the cooling medium flows smoothly, which can ensure the uniform temperature of the roller surface and the uniformity of film cooling.

2. Material and surface treatment: The roller material must have good thermal conductivity and mechanical strength, such as high-quality alloy steel. The surface can be treated for wear resistance, such as coating with a silicon carbide wear-resistant layer, to increase service life and ensure cooling effect and film quality under long-term use.

3. Speed stability: Choose a chill roller equipped with high-quality bearings and transmission devices to ensure uniform and stable speed and avoid affecting film cooling and thickness uniformity due to speed fluctuations.

4. Manufacturing accuracy: High-quality chill rollers have high manufacturing accuracy, and indicators such as roller surface flatness and cylindricity meet strict standards. They can be confirmed by checking the accuracy test report provided by the manufacturer to ensure film cooling and molding quality.

5. Welcome to contact us: Cheyoe Group! We have supplied many high-quality chill rollers, MDO stretching roller, corona roller for BOPP/CPP and other film production lines, and have rich experience and good feedback.