Isolation wool

We don’t recommend the desired planetary mill for comminution of isolation wool. Because of the low density and flexibility, an areal force should be better to comminute such a sample. We recommend using a Vibrating Cup Mill PULVERISETTE 9.

To feed the desired 50 grams of sample, we used a 250 ml grinding set made of steel. The sample was placed into the grinding set and ground with maximum speed for 6 minutes.

Afterwards, the sample was comminuted to a fine powder. The sample was not sticking yet, longer grinding times would be possible. The sample was lightly, grayish discolored (abrasion of steel).

We checked the particle size distribution with our Laser Particle Sizer ANALYSETTE 22 NeXT Nano. We already found a d50 < 3,4 µm.

Also stone- or ceramic grinding sets are available (in 100 ml total volume). For a comminution of 50 grams, eventually the grinding set could be refilled (after 1-2 minutes) after the first batch was compressed by the grinding set.

For an intensive cleaning of the grinding set, we recommend comminution a proper portion of sand and water. After max. 2 minutes, the grinding set should be flushed with fresh water and dried off to prevent corrosion.