Rolling ball ramp stop test method - initial tack force operation method

Rolling ball ramp stop test method - initial tack force operation method

Initial adhesion test method

—— Rolling ball ramp stop test method (ie national standard test method)

GB-T2794

1, test equipment: HD-525 adhesive tape initial viscosity testing machine

2, steel ball: diameter of 0.759-25.4mm (1-32 #), as a test steel ball.

3, Test conditions: Test room temperature humidity under the requirements of national standards

4. Samples: (1) Samples with a width of 100 mm and a length of about 200 mm shall have a clean glue surface, no wrinkles, and no stretching or deformation. 2 Do not allow hands or other objects to contact the surface of the sample.

5, test steps:

Ready to work: .

1 Remove the rust-proof steel balls, put them in a container filled with cleaning agent for several minutes, remove them, and wipe them clean with a clean, dust-free cloth.

2 Fix the upper and lower ends of the sample on the inclined plate (tilt 30.) with adhesive tape. If necessary, you can also use adhesive tape to fix along both edges of the test piece to make the sample fit flat on the plate. on.

Test: Use tweezers to clamp the steel ball into the ball putter to adjust the front and back position of the ball putter so that the center of the steel ball is on the starting line of the roller help section. Before the formal test, one sample is allowed to make multiple tests, but The left and right positions of the ball putter should be adjusted so that the trajectory of each ball rolling does not coincide.

Pre-selection of the largest steel ball: Open the ball putter, observe whether the rolled steel ball is stuck in the test section (stop moving more than 5s), from big to small, take different ball number of steel balls for the appropriate number of tests until Find the ball with the largest number of balls stuck in the test section.

Take the two balls with the largest ball number and ball number connected to them, and perform a test on the same sample to confirm the largest ball number.

6. Test result: The test result is represented by the steel ball number. The larger the steel ball number, the greater the initial tack force.

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