GB/T 28860-2012Test method for the determination of get time of encapsulating material of powdered epoxy (English PDF)

3.1

Thermometer, range 0 °C ~ 300 °C, accurate to 1 °C.

3.2

range suitable timer, minimum scale 1s.

3.3

paddles, Phi5mm glass rod.

3.4

heating plate, the diameter of 140mm or 140mm × 140mm, thickness 15mm ~ 20mm, can control temperature at 150 °C ±

1 °C. Heating plate has a circular polishing pits (cured disc) for placement test sample preparation curing disc diameter Phi (16 ± 0.1) mm, depth

4mm. Heating plate is placed on one side of the thermometer bore below the upper surface of the cured plate and extending horizontally near the center of the disc curing hole

Cured from the top center of the disc is not more than 2mm.

3.5

verification was used to verify the heating plate temperature, the material (melting point salt standard substance) known melting point.

3.6

measuring spoons capacity of 1mL, for a sample into a curing tray.

3.7

release agent such as polytetrafluoroethylene dispersion aerosol or equivalent substances.

3.8

scraper for the eradication of the sample plate heat cured on the disc, made of a material hardness is less than the heating plate.

5.1

Cleaning cure plate and heating plate.

5.2

The heating plate was placed in a laboratory is not ventilated location, turn on the power switch, the heating plate was adjusted to 150 °C ± 1 °C or product standard gauge

Given temperature, stable for at least 10min. Use a small piece of known melting point of verification was placed on a hot plate, to verify whether the surface temperature of the heating block

Desired temperature.

Glass rod in a circular motion agitating the molten sample. When the test sample starts to thicken, stirring while maintaining every 2s ~ 3s, will

Lift the glass rod (height approximately 10mm) from the molten sample. If drawing a glass rod that brought the formation of brittle fracture can no longer be brushed […]