Category Archives: Polymers & Plastics

Extrusion defects are often caused by interactions between resin, drying and handling, screw and die condition, temperature profile, cooling, and downstream equipment. Changing several settings at once hides the root cause. A better method is to define the defect, stabilize the line, and test one variable at a time. Surging and output variation Check feed […]

Choosing a polymer resin starts with the product requirement and processing route—not with a familiar grade name. Polyethylene and polypropylene cover a wide range of stiffness, toughness, chemical resistance, clarity, heat resistance, and processability. Define the application List the part geometry, service temperature, mechanical loads, chemicals, UV exposure, food-contact or regulatory needs, expected lifetime, color, […]