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09.05.2016 Protecting sensitive materials from moisture absorption

motan holding, Constance, Germany, has developed an easily operated system designed to protect sensitive materials from moisture absorption and contamination. Customers typically use pre-dried plastic granulate from sacks, notably for small production runs. If these sacks are not speedily emptied during continuous production, the granulate will – depending on type – absorb moisture from the air relatively quickly and the processing characteristics will be affected.

 

This can be prevented with the use of motan’s mobile blanketing bins: the new type BB 60, suitable for 25kg sacks, requires only minimal amount of oil- and water-free air (adjustable according to the material between 0.06 and 0.6m³/h) from the compressed air system to keep the granulate in its delivered condition for long periods of time. An option without blanketing bin serves purely as a transport and storage container for granulate with low moisture affinity, keeping the material safe from contamination. Larger material quantities are typically drawn from octabins. The danger of moisture absorption is also present here after opening the inner foil, resulting in the change of important material properties. This can be prevented by using motan’s light-weight yet robust BO 1500 blanketing cover made from polycarbonate. Very small amounts, adjustable between 0.24 and 3m³, of oil- and water-free air from the compressed air system prevent the absorption of moisture even for extremely hygroscopic materials such as PA6. An alternative cover without blanketing device is suitable for use with materials which are not sensitive to moisture. Both types can be used with all standard European octabins. www.motan-colortronic.com 
 
 
BB 60 blanketing bin  and (below) the BO 1500 fits all standard octabins, keeping the contents at a defined moisture level

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