Desiccant Calcium Oxide

calcium oxides are powerful desiccants that can alleviate problems which develop during the processing of elastomeric and thermoplastic compounds due to the presence of moisture. Moisture can be present in raw materials e.g. polymers (especially hydroscopic types such as ABS, polyamides etc.), fillers and plasticisers. As little as 0.02% moisture can cause porosity in the end product if it is allowed to expand freely into water vapour at polymer processing temperatures. Whilst pre-drying raw materials can help, this is often an expensive and time consuming process, and the use of vented processing does not always solve the problem entirely.