Farrel Pomini and NatureWorks: Advantages of continuous mixing technology for PLA processing

Farrel Continuous Mixer (FCM™)

FARREL POMINI and NatureWorks conducted joint research to compare the processing of Ingeo™ polylactide (PLA) compounds on the Twin Screw Extruder and the Farrel Continuous Mixer (FCM™). The objective of the study was to evaluate the effects on molecular weight loss in PLA while adding a talc mineral filler.

Ingeo polylactide (PLA) or polylactic acid is a biodegradable and bioactive polyester derived from sustainable, renewable resources, such as corn starch, cassava, or sugarcane. It is often used in food packaging and fiber/nonwovens industries and is one of the most highly utilized bioplastics in the world.

The study found that the FCM™ resulted in significantly better molecular weight retention. Trials showed a 95% molecular weight retention when using 50% filler and 88% retention when using 60% filler.

In addition, the trials demonstrated that FCM™ technology provides other distinct advantages over Twin Screw Extruders regarding lower melt temperature as well as lower specific energy. The minimal residence time and efficient mechanical shear respectively, that are the cornerstones of the FCM™ operating principles, are responsible for these outcomes.

PLA is often compounded with mineral fillers and/or additives to improve physical properties. The benefits of the FCM™ would allow for lower processing costs, higher mineral fill levels and improved physical properties relative to Twin Screw Extruders.

The results are being presented at various conferences worldwide beginning with ANTEC® 2019, March 18 – 21 in Detroit, Michigan USA.

About FARREL POMINI

FARREL POMINI was established in 2011 to focus expertise in the continuous mixing equipment sector of the HF MIXING GROUP member companies. As separate companies, Farrel Corporation and Pomini Rubber & Plastics Srl possess over 100 years' collective experience in the polymer processing industry. Farrel Corporation's rich history dates back to the 1840's during the Industrial Revolution in the United States as a foundry and equipment manufacturer for the rubber industry. In 1963, the Farrel Continuous Mixer (FCM™) was developed and introduced to the thermoplastic processing industry.