Prepared samples are tested by peeling apart the release backing from the coated face material (or vice versa), at an angle of 180°. The average peeling force is calculated, and reported as centinewtons per 50 mm width of sample.
Representative samples are conditioned by being compressed between glass or metal plates at a specified pressure. After further conditioning, the strip is adhered to a test plate with double-sided tape. The facing material may be peeled from the release substrate, or vice versa. The laminate is peeled apart at an angle of 180° with a jaw separation speed of 300 mm per minute. The average force is recorded from the centre section of the test strip from at least 5 readings at 10 mm intervals.
Sample and batch number if appropriate.
Low speed release force
Whether the adhesive material is separated from its backing sheet, or the backing sheet from the adhesive coated material.
[Please refer to the latest official FINAT Technical Handbook for more detailed information. This overview is intended to provide a basic understanding of the test procedure and suitable equipment to meet the standard.]
FINAT Test No. 3 180° Peel Adhesion
FINAT No. 3 –180° Peel
50 mm wide sample on float glass
Test results with “Pass/Fail” indication