Presto Stantest manufactures premium quality of COF tester for calculating the coefficient of friction of the plastics films, papers, thermoplastics, polyethylene, etc. The laboratory testing device is widely used in the paper and packaging products manufacturing industries..



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Presto Stantest manufactures premium quality of COF tester for calculating the coefficient of friction of the plastics films, papers, thermoplastics, polyethylene, etc. The laboratory testing device is widely used in the paper and packaging products manufacturing industries. The instrument is designed in accordance with various standard test methods that are provided by different national and international standardization authorities such as ASTM, ISO, BIS, etc. The test is performed to evaluate the stacking ability of the plastic films and sheets. This type of testing enables the manufacturers in plastic industries to prevent accidents due to friction in loading, packaging and transporting the materials from one place to another. The uneven film thickness of can results in the enhanced friction which can lead to uneven strength of the film.

Calculating Coefficient of friction using presto’s COF tester helps to reveal the degree of mistreatment that the plastic films can endure without damaging the actual content. Presto’s Coefficient of friction tester measures the coefficient of sliding friction. It is a simple and precise testing machine which is designed to test the friction that actually exists between the two surfaces that are covered by the same plastic material. In some plastic films, such as polyethylene many slip properties are generated just because of the additives. The additives have a different degree of compatibility with the film matrix. It is a well-known fact that makes the specimen bloom, lubricate it and make it more slippery. As the blooming is not uniform on all the areas of the film, the results that are generated from these tests will not be reproducible. The frictional properties of the plastic films and sheets may be reliant on the consistency of the rate of motion amongst the two surfaces. The results that are obtained from this test procedure are extremely sensitive to the working life of the film or sheet.

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