(1) Definition
Apparent density refers to the mass of powder coating per unit volume, expressed in g/c㎡
(2) Instruments
See Figure 6-1 for the funnel, which is made of metal.
Funnel for Apparent Density Test (Brass)
The volume of the measuring cylinder is 100mL±0.5mL, the inner diameter is 45mm ± 5mm, it can be made of metal, the inner surface is polished,
The size and shape of the sealing plate shall be suitable for sealing the lower opening of the funnel.
The sense of balance is 0.1g.
(3) Test steps
Put the funnel vertically, and its lower opening is directly above the measuring cylinder, the distance is 25~30mm, and the two are coaxial.
Before loosening the powder to be tested, use a measuring cup to take out 110~120mL (more if necessary) powder sample. Block the lower opening of the funnel with a sealing plate, and pour the powder sample into the funnel.
Quickly release the sealing plate to let the powder sample flow into the jig. If necessary, a small stick can be used to loosen the powder sample in the funnel to help flow out.
When the scale is full, use a ruler to level the surface, and use a balance to weigh the mass of the powder in it, accurate to 0.1g.
