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ASTM D5179 Adhesion Tensile Testing Equipment for Organic Coatings to Plastic Substrates

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ASTM D5179 Adhesion Tensile Testing Equipment for Organic Coatings to Plastic Substrates

ASTM D5179 is a standard test method used to evaluate the adhesion and tensile strength of organic coatings on plastic substrates. It can be used in testing paints, primers, and other coatings.

What Is ASTM D5179?

ASTM D5179 determines organic coating adhesion to plastic substrates by mounting and removing an aluminum stud from the surface of the coating and measuring the force required to break the coating/substrate bond. The test is called a Direct Tensile Method.

ASTM D5179 Test Summary

An aluminum stud is bonded directly to a coated cured panel. The adhesive is allowed to cure for several hours at room temperature. The specimen is then subjected to a tensile test using a universal test machine. The coating must adhere to it for the expected service life. Because the substrate and its surface preparation (or lack of it) has a drastic effect on the adhesion of coatings, a method of evaluation adhesion of a coating to different substrates or surface treatments, or of different coating to the same substrate and treatment, is of considerable usefulness in the industry. The pull-off strength (commonly referred to as adhesion) of a coating is an important performance property that has been used in specifications. This test method serves as a means for uniformly preparing and testing organic coatings on plastic substrates.

What Test Machines Are Recommended for Plastic Adhesives?

Our universal test machines perform quasi static tension/compression tests, such as tensile, peel, adhesion, and flexural testing. The machine force capacity should be chosen by taking into account the highest force needed over the lifetime of the equipment. Our machines feature a uniform constant rate of extension (CRE), or constant velocity control mode, with a speed range between 1 and 500 mm/min (0.04 to 20 in/min). Force measurement complies with ASTM E4. This application requires 50 mm/min (2 in/min) test speed.