Adhesive tapes and other adhesive products are widely used. Poor adhesion can affect things related to people. To further improve the safety and reliability of the adhesive market, relevant national departments have issued the reference standard CNY-2 for tackiness testing.
Wipe the test plate and loading plate with a cleaning agent and a wiping material, then carefully dry them with a clean gauze. Repeat this cleaning process at least three times until the working surface of the plate is visually clean. After cleaning, do not touch the working surface of the plate with your hands or other objects.
Attach the sample parallel to the longitudinal direction of the plate to the middle of the adjacent test plate and loading plate. Roll the sample with a pressure roller at a speed of approximately 600 mm/min. Note that during rolling, only the force generated by the mass of the pressure roller should be applied to the sample. The number of rolling cycles can be specified according to the specific product; if not specified, roll back and forth three times.
Let it sit for 20 minutes. Then, fix the test plate vertically on the test frame and gently connect the loading plate and weights. Place the entire test frame in the test chamber adjusted to the required test environment and record the start time of the test. After the specified time has elapsed, remove the weight. Use a graduated magnifying glass to measure the displacement of the sample as it slides down, accurate to 0.1 mm; or record the time it takes for the sample to detach from the test plate. For times greater than or equal to 1 hour, record in minutes; for times less than 1 hour, record in seconds.
