EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of ISO 21194 testing. This standard specifies a method for evaluating the adhesion of elastic adhesives and sealants [with a minimum elongation at break of 100% and a maximum modulus of elasticity of 10 MPa[1]] on various substrates.
ISO 21194 is an international standard that specifies a test method for evaluating the bond strength of elastic adhesives in adhesively bonded joints using a bead peel test. The test is designed to determine the adhesive's ability to provide a strong bond between two surfaces under tensile stress.
In this way, the effect of surface pretreatments of various coatings or substrate materials on adhesion can be compared. Pretreatment can also be used to evaluate the effect of substrate and adhesive on the long-term durability of adhesively bonded joints and gaskets. This test can also be used for process monitoring and quality assurance accompanying production.
The test involves applying a bead of adhesive to one of the two substrates, which are then clamped together and allowed to cure for a specified period of time. After curing, the bonded substrates are placed in a tensile testing machine and a tensile load is applied to the bond area in the direction perpendicular to the bond line. The force required to separate the adhesive beads from the substrate is recorded and this value is used to determine the strength of the bond.
The results of the bead peel test can be used to compare the performance of different adhesive formulations and to ensure that a particular adhesive is suitable for a particular application. This test is particularly useful in evaluating adhesives used in elastic applications such as the automotive industry, where the bond's ability to withstand cyclic loading is critical to the adhesive's performance and durability.
While the bead peel test is a useful tool for evaluating adhesive performance, it is important to note that it is not the only test that should be used. Other factors such as environmental conditions, surface preparation and method of application can also affect the performance of an adhesive bond. Therefore, it is important to consider all relevant factors when selecting and testing adhesives for elastic applications.
EUROLAB assists manufacturers with ISO 21194 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.
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