Adiprene C930, a unique Low Free MDI based cast urethane from speciality chemicals company LANXESS, has just proven as an appropriate material for being processed via injection molding. The Korean company Autox developed a production process that allows cast polyurethane to be injection molded. It combines the processing advantages of injection molding along with the properties of cast urethane. Autox has recently launched a new vibrating screen for the mining industry which is made from this Adiprene cast PU prepolymer by injection molding.

One of the benefits of working with injection molding is the high production output rate that makes the process highly efficient and cost-effective. In a limited amount of time and with a single mold, more parts can be manufactured. Cost efficiency is also influenced by labor cost which is typically lower than in pour casting. The current production time of an injection molded mesh screen is five minutes, while the pour casting process will normally take 35 minutes to manufacture the screen. Adiprene LF (Low Free) prepolymer delivers improved industrial hygiene, along with ease of processing. It offers a perfect fit with the injection molding process, as the viscosity is lower than of a conventional prepolymer.

The Adiprene C930 mining screen offers outstanding abrasion resistance and rebounding properties, improving the lifetime and screening efficiency of the part. Results of this caprolactone based technology have been supported by field testing, it has been proven that the lifetime of the screen can be up to three times longer than the market high quality reference. This allows less downtime in the mine operation leading to maintenance savings.