Overview
QGZ-24 automatic film Drying time Recorder is a new instrument for measuring coating drying time of HuiNuo brand. It can automatically and continuously show the state of each stage of the film drying process in the form of drawing a circular trajectory, intuitively analyze and observe the time used in each stage, and is suitable for the detection and formulation research of various paint films.
Features
1. Automatic continuous drawing of circular trajectory, intuitive display of the whole process of drying.
2. Applicable to films formed by various coatings.
3. It is a satisfactory instrument for coating testing and coating formulation research.
Principle
The instrument is driven by the motor through the connecting shaft to rotate the rotating arm equipped with the scribe needle at a uniform speed. The instrument is placed on the film test board, after the power is turned on, the rotating arm rotates at a set speed (one week/6 hours, 12 hours or 24 hours), and the scribe needle draws a circular track with a diameter of 100mm on the film. As the film gradually dries, the scribe plow mark narrows from wide to deep to shallow until no trace can be drawn at the end, thus showing the whole process of drying.
Applications
Paint testing and coating formulation research
Steps
1. According to the requirements of GB1727-79, on the test plate (such as Glass plate or tinplate) on the preparatory film.
2. Use scribing needles according to the characteristics of film drying (fine scribing needles are used for quick-drying paint).
3. Place the instrument on the test board as a whole. Before placing, tighten the rotating arm counterclockwise (looking down) with your finger to eliminate the mechanical gap.
4. Draw a mark on the contact between the test board and the scribe needle, turn on the power supply, press the switch, the indicator light is on, the motor is running, and the test starts.
5. At the end of the test, turn off the power and remove the test plate. Place the time dial concentrically on the test plate and align the 0 points on the plate with the test start point on the test plate to judge the time used in each stage of the drying process.
Notice
• Test board requirements: Glass plate (200 * 200 * 2 - 3mm), smooth tinplate (200 * 200 * 0.2 - 0.3mm) or agreed test board material can be used.
• Test environment: According to the requirements of GB1727-79, the coated test plate should be placed horizontally, avoiding airflow and direct sunlight, and the drying test should be carried out at a temperature of 25 +/- 1 ° C and a relative humidity of 65 +/- 5%, or according to other agreed conditions.
