Ozone Climate Simulators
In the automotive industry, a great variety of rubber parts are used, such as door seals, wipers, axle covers, fuel hoses, tires, etc. Cracks frequently occur in rubber parts due to environmental factors, particularly due to atmospheric ozone, which breaks the carbon-carbon double bonds. Concerning vehicles, the service life of rubber is a question not just of quality but also of safety, especially if a fuel line or a tire bursts. Consequently, all European car manufacturers have in-house testing directives, based on general and national test standards (DIN, NF, ISO). To determine the fatigue strength, so-called WÖHLER charts are created. The criteria are either individually specified by the car manufacturers or adopted from the standards.
In the aircraft industry, the fatigue strength of rubber parts and elastomers is a particular security aspect. A cable fire caused by cracks in the insulation has devastating consequences which already led to aircraft crashes in the past. In space (Columbus space shuttle), the fatigue strength is important because of the extreme difficulty of repair work. The same applies to the power cables of magnetic levitation trains (Transrapid Maglev Train Shanghai). Specific standards for the testing of cable insulations have been compiled.
Tires for vehicles – cars, trains, elevators, airplanes, buses, trucks, bikes and racing cars – become a security risk in case of a material crack. Moreover, shortcomings in availability are a cost factor.
Seals & Rubber Parts Industry
Rubber parts and/or samples thereof are tested in so-called ozone test chambers (ozone climate simulators). The testing conditions can be set and simulated depending on the application and in accordance with the relevant testing standards. If rubber parts are dynamically strained during subsequent use (tires, windscreen wipers), then test tools (SIMtools) are used in the simulators. For this purpose, Anseros developed specific and patent-protected testing equipment, for example in case of the Anseros Ozone Climate Simulator SIM7300-TH with the testing tool SIMtool 75049 for static and dynamic ozone resistance tests according to ISO 1431-1, continuous and intermittent. Anseros also provides appropriate consultancy for the development of a testing laboratory and for carrying out tests.
For cables and their insulations, specific standards apply, such as the international standard IEC 60811-2-1 – standards which essential differ from the ISO 1431-1 in particular. It may be noted in general that all ozone testing standards (such as ASTM D 1149, VDE 0472, DIN ISO 1431-1, EN50396, IEC60092-351) are different from each other. Special features lie in the longitudinal inflow direction onto the samples and in the turbulent flow through the chamber. These test conditions are exclusively fulfilled by the Anseros Ozone Climate Simulator SIM7300-TH with the testing tool SIMtool 75049 (HD22.1/.2, cables and insulated wires). Anseros is glad to provide you with further information and advice on these issues.
The quality of textiles is rated according to their color fastness and color resistance (ISO 105-G03, AATCC109). The use of an accurate ozone analyzer is important for reliable and reproducible testing. Anseros developed a single beam photometer MP which can selectively detect ozone even in the presence of volatile hydrocarbons (VOC).
Life Sciences Test
Anseros ozone climate simulators are useful for biological, medical and pharmacological studies and tests, for example on bacteria and viruses, cell and plant growth, lung tests, animal husbandry, and furthermore for the development of pharmacological products in the cosmetics sector.
Many devices at home and in industry emit ozone and VOCs. For product type approval tests, Anseros manufactures special test chambers according to UL867, ASTM D 6670, VDE 0700 part 65, DIN EN 60335-2-65. The accuracy of the ozone measurement is ensured by traceability based on DKD-certified instruments.
Outer and inner surfaces are treated in an Anseros chamber to create the predefined required coating properties, such as adhesion. Foams, varnishes, color prints and coatings profit from a highly improved adhesion. In CVD processes in the semiconductor industry, silicon surfaces are configured. APR process chambers are also used for the development of additives and catalysts for protection against ozone influences. Advice and support for such highly application-oriented solutions is provided by Anseros Engineering.
Recommended Anseros Ozone Climate Simulators
What actually is the purpose of ozone test cabinets?
In most cases, they are complex systems to predictively determine the longevity and durability of rubber products (elastomers) under operating conditions. The test systems include devices for ozone generation and measurement as well as other components for climate simulation, for example sensors and control elements for moisture, temperature and climate. Mechanical devices are frequently integrated into the test chambers. Rhythmically exerting stretch or twist forces, they simulate the forces the material samples will have to withstand in everyday use.
But why ozone as a test gas?
Natural atmospheric ozone attacks elastomer compounds and thus leads to embrittlement, cracking and ultimately to malfunction of tires, gaskets, cable insulations and other rubber products in the longer term. In ozone climate test chambers, this aging process is highly accelerated by a controlled multiplication of the natural occurrence of ozone. Thus, the product quality and the necessary maintenance intervals for security checks or replacement of elastomers can be determined.