Adhesive Strength Test

Loop Tack Test

Several methods are used to measure the tackiness of pressure sensitive adhesives attached to films, labels, stickers, and tapes. These include loop tests and 90º and 180º peel tests. In the loop test, a loop of adhesive tape attached to the probe of the testing machine makes contact with a horizontal surface and is pulled away after a short time. This measures the maximum force needed to peel off the tape from the substrate. In the 90º peel test, the adhesive tape is attached to a horizontal plate with the other end sticking up perpendicularly, forming an “L” shape. In the 180º peel test, the adhesive tape is placed vertically between the peel test grips with the free end of the tape gripped by the top forming a tight “U” shape. The 90º and 180º peel adhesion tests measure the constant force required to peel off the tape rather than the maximum force. The 90º peel adhesion test normally gives a lower value than the 180º peel adhesion test.

Celadon Technology Company Ltd. specializes in the production of premium vinyl graphic products and adhesive systems used in commercial and industrial applications. We implement stringent quality control procedures to ensure our products are of the best quality. We also have a dedicated research and development team to provide custom solutions to our client’s needs. Visit our website to learn more about us.

Reference: https://www.iqsdirectory.com/articles/tape-suppliers/adhesive-tape.html?msID=1f7798fc-4305-49eb-8ba4-85ca244c575d