A COF Tester (Coefficient of Friction Tester) is a precision testing instrument used to measure the static and kinetic frictional properties of materials such as plastic films, laminates, paper, packaging sheets, and flexible substrates. This test is essential in evaluating the sliding and stacking behavior of materials during handling, processing, and transportation. By determining both static COF (the initial resistance to motion) and kinetic COF (resistance during motion), manufacturers can ensure product quality, reduce packaging defects, and optimize material performance. Industries such as packaging, printing, food processing, and consumer goods rely on COF testers to maintain smooth production and avoid issues like film jamming, slipping, or uneven stacking. Modern digital COF testers offer high accuracy, easy calibration, and compliance with international testing standards such as ASTM D1894 and ISO 8295. Investing in a COF tester ensures consistent quality, cost efficiency, and reliable performance of packaging and flexible materials.
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