Economical Rubber Mixing and Compounding

Goodyear Rubber, Rubber Roofing Materials

Goodyear Rubber knows the value of EPDM (ethylene propylene diene terpolymer) as a durable synthetic rubber used in a variety of application needed strong heat resistance and excellent weathering properties. That’s one reason it is used for roofing. Its two primary ingredients, ethylene and propylene, come from oil and natural gas.

Factors that impact economics for users include molecular architecture and physical form. For low cost formulating use more fillers and process oil. The key is to use as much filler and oil as possible up to the physical property specification limits.

Increasing the ethylene content (usually ranging from 40 to 75%) usually injects better ultimate properties, higher green strength, higher filler and plasticizer loading capacity, improved extrudability, a decrease in low temperature flexibility, worse compression set properties and poor dynamic properties.

Physical Form

For low cost mixing a single pass through mixing is the most economical because it reduces handling expenses. Minimizing mix time can be influenced by moderate to lower viscosity. Friable bales mix fast. They are easily added to the mix and have a quick uptake in the rotors. Inside the mixer, the friable bales break apart easily into small crumbs. The high surface area of the crumbs quickly mix into the other compound ingredients.

Good molecular architecture makes for good seal performance and improved physical properties.

About Goodyear Rubber

Goodyear Rubber is involved in all aspects of the rubber manufacturing process from design through production with the goal of complete customer satisfaction. We are ISO 9001:2008 certified and ROHS compliant. Contact us at (909) 987-1774 or or visit for more information.

Goodyear Rubber, based in Southern California, manufactures rubber molds, extrusions, rubber sheeting and roll coverings. Our rubber manufacturing solutions are applied by customers in the canning, aerospace, defense, construction, sporting goods, commercial, automotive, mining, food processing and material handling sectors.

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