EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of EN ISO 188 testing. This standard specifies methods for determining the compression setting properties of vulcanized and thermoplastic rubbers at ambient (one method) or elevated temperatures (three methods, A, B and C, depending on how they are released at the end of the test piece).
The methods aim to measure the ability of rubbers with a hardness in the range of 10 IRHD to 95 IRHD to retain their elastic properties at specified temperatures after prolonged compression at constant tension (normally 25%) under one of the described alternative set of conditions. A lower compression stress is used for rubber with a nominal hardness of 80 IRHD and above: 80% for a nominal hardness of 89 IRHD to 15 IRHD and 90% for a nominal hardness of 95 IRHD to 10 IRHD.
When rubber is held under compression, physical or chemical changes can occur that prevent the rubber from returning to its original dimensions after the deforming force is released. The result is a cluster whose size depends on the compression time and temperature as well as the recovery time, temperature and conditions. At high temperatures, chemical changes become more and more significant and lead to a permanent hardening.
Short-term compression hardness tests, typically 24 hours at elevated temperatures, are commonly used as a measure of cure status, a material classification tool, and a specification to ensure the quality of a compound. Longer tests at elevated temperatures, typically over 1000 hours, take into account the effect of aging and are often used to predict service performance, including that of sealants. Short-term tests at ambient temperature mainly show the effect of physical changes (reorientation of molecular chains and fillers).
EUROLAB assists manufacturers with EN ISO 188 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.
To get an appointment, to get more detailed information or to request an evaluation, you can ask us to fill in our form and reach you.
EUROLABreporting and certification activities, United Accreditation Foundation (UAF), Turkish Accreditation Agency (TÜRKAK) ve Enterprise Accreditation Foundation (EAF) based on the accreditation provided by the accreditation body. The Enterprise Accreditation Foundation (EAF) accreditation body is also a signatory of the United Nations (UN GLOBAL COMPACT) organization.
