Compounding

Our primary focus here at Polymer Science Park is the compounding of post-production or post-consumer plastics. Additionally, we frequently utilise our equipment for R&D or pilot trials for new sustainable innovations. Consequently, the compounding line is often used to simulate the (thermo) mechanical recycling of thermoplastics, as well as for general extrusion trials. For this purpose, For these activities, we employ the Thermo Scientific Modular Extruder.

Versatility through Modularity

This machine truly stands out due to its modular design. A single drive unit can be equipped with various process attachments for production processes, including:

• Compounding
• Film blowing
• Fibre spinning
• Rheological measurements

Currently, the system is fitted with two key attachments: a twin-screw extruder for compounding and a batch mixer for small-scale mixing and analysis of plastics.

How We Apply Our Technology

The twin-screw extruder can be used for testing mechanical recycling and producing small-scale compounds (ranging from 1 to 100 kg). We can produce these compounds with high accuracy thanks to our gravimetric dosing systems, the temperature-controlled cooling bath, and the adjustable pellet length at the granulator.

Due to the small scale of the machine and the ability to open the barrel, this setup is also perfectly suited for training operators.

The Batch Mixer

The batch mixer allows us to characterise and mix plastics on a very small scale (approximately 50 grams). With this machine, you can determine various properties, such as:

• Melting behaviour

• Gelation

• Thermal stability

Furthermore, small batches of compounds can be produced, which can then be further analysed in our dedicated test lab.

“This machine enables us to test the recycling and compounding of a variety of materials starting from a very small scale. Looking ahead, we can expand the system to test various processing techniques, such as fibre spinning and film blowing, also on a small scale.”