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RingExtruder Applications:
Plastics Compounding
Normally, compounding plastics requires a balance between the energy needed to melt and mix the formulation without creating too much shear. It requires temperature history to excessively degrade materials and adversely affect product properties. Compounding TPO (thermoplastic olefin) elastomer blends is particularly challenging when the best balance of a modulus property and a strength property is needed.
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The RingExtruder's superior mixing and material temperature control proved significant. Properties achieved with TPO samples from a RingExtruder certainly exceeded those properties commonly associated with a batch melt mixer or a continuous twin-screw extruder.
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Two typical non-filled, TPO formulations were compounded with a batch melt mixer and a RingExtruder. The first contained 13 wt% elastomer and the second 25 wt%. The flex modulus, elongation at break, tear strength, and yield stress of each of the 4 samples was measured and compared. In every case, results when using the RingExtruder were superior to those when using the batch melt mixer. Using the RingExtruder, all of the properties except elongation at break were better at 13 wt% elastomer than at 25 wt% elastomer. Using the batch melt mixer, only the flex modulus was better at 25 wt% than at 13 wt% elastomer.
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Incorporating a RingExtruder into your operation can result in a quick return on your investment. Our research and engineering staff is ready to explore with you how your products and operations could benefit and to complete trials to quantify your benefits and savings. Contact us to schedule an engineering review of your requirements.
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