| A case study was carried out on a medical device plastics product. Thermoplastic polyurethane was injection molded using selected grades within a Durometer range of 85A to 75D for a disposable product used in chemotherapy treatment. Rheological testing methods were implemented to select the raw material, keeping viscosity and processability as the two main criteria. Moldflow(TM) simulation gave the fill time and pressure requirements for the new product which was used for the DOE, design of experiment studies. Quality control tools were used to evaluate the process capability. The 85A grade of thermoplastic polyurethane was selected based on the optimum balance of properties and processability. |
