Techniques in Batch Mixers

A summary of techniques used is included below, but for a more extensive discussion on achieving quality mixing, the reader is referred to articles by this author (185, 198). 

This is said to improve black dispersion in EPDM compounds. But most of this information comes from the research laboratories of the polymer manufacturers and is developed using small-scale machinery. Upside down mixing is usually disliked by the machinery manufacturers who suspect that dust stop damage and leakage is more likely than when conventional techniques are used, but production mixer control systems usually ensme that a one-shot conventional feed is used where black and oils are added on top of the polymer. 

During mixing this has become commonplace for achieving the best possible quality in a single mixing pass. Control of batch temperature and batch discharge conditions are two areas where this technique is very powerful. 

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