AEROSIL® for Adhesives and Sealants - Adhesives & Sealants by ...

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Typical bag packagingof Evonik AEROSIL® fumed silicaAEROSIL® fumed silica in the new bulk product container(FIBC: Flexible Intermediate Bulk Container)Technical Handling Service of AEROSIL®enables compact solutionsWorking with AEROSIL®The handling of AEROSIL® fumed silica is receiving increasedattention at a time when automation, rationalization, industrialhygiene for the protection of employees, and environmentalregulations are all becoming more and more important. Parallelto these developments, the Business Line Aerosil has beenexpanding its activities in this field for more than ten years.The planning of dust-free, automatic plants for AEROSIL® fumedsilica requires a fundamental knowledge of the products, togetherwith experience in process engineering when handling fumedoxides. We combine our experience in this field with the specificknow-how of our customers and the know-how of themanufacturers of conveying, dosage, and production units.This enables us to develop joint concepts which facilitate thehandling of AEROSIL® products at our customers’ plants.HandlingThe term handling is used to describe thetechniques required to move AEROSIL®products within a customer’s plant. Thefollowing topics should be regarded asthe main priorities:• Emptying of packaging units• Silo storage• Internal conveying• Dosage• Introduction of the material into theprocessing machineryIn addition to these points, the termhandling also includes topics essential toputting the above steps into practice.More detailed information about theoffering of this service is available fromthe customer service agent in your area.18
Dust-free, automatic filling unitPackagingAEROSIL® fumed silica in powder formis available in three different packagingunits. The standard packaging is themulti-layer paper bag, with an additionalpolyethylene liner for certain products.The weight of the bags range from 10 lb.,20 lb. to 10 kg in the US and from 10 to20 kg in all other regions, and depends onthe AEROSIL® grade and its set tappeddensity. Evonik also offers AEROSIL®fumed silica in a new kind of packaging inthe semi-bulk range – the FIBC (FlexibleIntermediate Bulk Container). Dependingon the product and its densification ratio,the weights of the filled FIBC’s also vary.Large-scale users may also have theproduct delivered by silo truck, whichrequires a corresponding storage siloat the customer’s location. AEROSIL®dispersions, known as AERODISP®, aredelivered in 60 kg cans, 220 kg barrelsand 1.000 kg IBC’s (Intermediate BulkContainers).Storage StabilityAEROSIL® fumed silica is chemically inertto a large extent and shows no chemicalchanges after long periods of storage,provided it is stored under suitableconditions. Nevertheless, it should benoted that a small number of substancesdo react with silicon dioxide. Due to itshigh specific surface, volatile substancesmay be adsorbed on the AEROSIL® fumedsilica surface. This adsorption is reversiblein the case of moisture. The adsorption ofmoisture is significantly reduced by theorganic modification of the hydrophobicAEROSIL® grades.It is possible that prolonged periods ofstorage may cause the AEROSIL®products to become slightly compacted.This can lead to a minimal rise in thetapped density, which might slightlyaffect correlated product properties.19
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AEROSIL® for Adhesives and Sealants - Adhesives & Sealants by ...

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