PLA Foam Extrusion Line

As is known to us all, plastic pollution is getting more and more serious all around the world. Plastic dish plates, the whole world has more than 4 million consumptions, most of which are non-biodegradable. In order to make our earth green, COWELL has made his own contribution, we have developed the CO2 super-critical PLA foam extrusion line which can minimize plastic pollution.

During the constant foaming process, the cleating and growing of bubbles is the main influence on the foam products. While the factors which affect the bubbles’ cleating and growing are the processing parameters, such as pressure, temperature, and shearing, surely the raw materials function, and size also affect it. So we can improve the processing parameters to control the bubble cleating and growth to improve the quality.

What we do on our unique PLA foam extrusion line specially?

1. We convey the Super Critical CO2 by a precise close-loop injection system, insuring the accurate conveying of the CO2 and that it is at the supercritical status.
2. Increase the mixing and dispersion screw elements to improve the capability and contact area of the CO2 and polymer, thus the mixing and dispersion will be sufficient
3. The injection port is located at the second stage of the extruder, It will prevent the back flow of CO2 which might cause unstable in the system.
4. Accurate controlling for the screw speed and the temperature is essential to improve the melt pressure and viscosity and increase the solubility & dispersion of CO2.

Technical Parameters