Blown powder formulation

The spray dried granules are often known as blown powder. The components of blown powder are those of the detergent formulation that are robnst to the operating temperatures within the tower. The core components are as follows ... 

In the majority of granular detergent formulations, the physical properties of the products are determined by the blown powder properties. The key properties are as follows ... 

Cake strength. The cake strength as measured by a uniaxial shear test is often used as a measure of flowability and granule stickiness. These are important properties for both postprocessing and consumer acceptance. The cake strength tends to be an intrinsic function of the formulation and blown powder moisture. Apart from this, the process conditions tend to have only a minor effect... 

The catalyst is deposited on the walls of monolith channels as a slurry, which is then dried and calcined. Preparation of the slurry is an exacting procedure, with pH, particle size and solids content rigidly controlled. The optimal values of these parameters must be determined for each formulation. Without a high degree of adhesion to the channel wall, the catalyst can easily be turned to powder and blown out of the system, sometimes on vehicles in production. Such crises are not infrequent in the industry and must be attended to immediately. Sometimes a simple adjustment, such as changing the particle size, is effective. Several binding agents are commercially available and are often used. 

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