Try this definition for dense: tightly packed so close together that there is not much space of room or open space. The question becomes what is in the open spaces of a pellet to allow for compaction / squeezing? As I understand pellet manufacture, the extruder compresses the wet ingredients and uses pressure to force it through holes or tubes and when the pellets leave the extruder they expand. I assume when they expand they absorb air which makes them float. I will try to check if this is correct. I have looked at some AM600 under the microscope when I was having trouble with a batch of pellets falling apart more than usual and the pellets had lots of tiny air spaces in them. Dr Mark Griffin said plant was having extruder problems and they were getting too much air into the pellets. I will see if I can find those pictures and send you one.

Last edited by Bill Cody; 11/03/12 09:06 PM.

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