(1) Definition
The non-volatile content is the percentage of weight loss due to the volatilization of thousand volatiles when a certain amount of powder coating is baked under the specified temperature conditions, and the unit is expressed in %.
(2) Equipment
The oven can be heated and controlled to 105°C±2°C or 230°C±3°C.
Aluminum box dish with flat bottom, diameter 50mm. 10mm high.
The sense of balance is 0.01g.
(3) Test steps
Weigh out 2.0g of soil and 0.1g of powder sample, put them into a weighed aluminum pin plate, put the plate into an oven with a constant temperature of 105°C±2°C for 1 hour, or put it in an oven at 230°C±3°C Bake for 5 minutes, put it in quickly, so as not to drop the temperature of the box significantly, take out the aluminum foil dish after the specified time, cool to room temperature and weigh.
(4) Results
1g。 According to formula (6-2) to calculate the non-volatile content, accurate to 0. 1g.
Non-volatile content (%)=[(CA)/B]X100 where
A - disc weight, g;
B — weight of powder sample, g;
C — the mass of the dish and the contents after heating, g,
