Study Cards on extruder, carbohydrate, fluidized
Explain why this cool air is necessary. What would happen to the powder if the fluidized bed would be omitted?
- reduce the oil volume fraction
- increase the size of the particles.
Describe the structure of the oil phase. Will this phase be a continuous or a dispersed phase and does oil contribute to the anisotropy of the final product?
Mention 1 advantage and 1 disadvantage of using a single screw extruder for this application. Consider the composition of the product. Explain your answer.
Disadvantage: more difficult to operate. Especially the presence of fat might lead to slip.
How will the decreasing chain length of the carbohydrate influence the number and composition of the phases, which you described under question a. Explain your answer.
Why is it necessary to use a cooling die in this application? If you think of more reasons, indicate then which reason you think is most important. Motivate the answer.
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