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ISO3917:1999 Automotive Safety Test Standard1
1 Subject content and scope of application This standard specifies the test methods for radiation resistance, high temperature, humidity, combustion and simulated climate resistance of safety glass for road vehicles. This standard applies to the safety requirements for safety glass for road vehicles (hereinafter referred to as safety glass). Such safety glass includes articles processed from various types of glass or formed from glass combined with other materials. Normative references This standard uses the following standards by reference. The latest revisions and supplements or version changes of various standards have not been reflected in time. However, the parties through the development of the standard are encouraged to apply the latest version as far as possible, as shown below. For standards that do not give time, the latest time shall prevail. ISO and IEC members are responsible for the registration of existing valid International Standards. ISO 3536: 1999 ISO 3537: 1999 ISO 3538: 1997 ISO 3795: 1989 ISO 4892-1: 1999 ISO 4892-2: 1999 ISO 4892-4: 1999 ISO 15082: 1999 given in. Test conditions Unless otherwise specified, the test should be carried out under the following conditions: -- .Temperature: 20℃±5℃ --. Air pressure: 86kPa-106 kPa (860mbar to 1060 mbar) -- . Relative humidity: 60%±20% Test items and applications For some types of safety glass, if the test results can be predicted from some of its known properties, it is not necessary to carry out all the tests specified in this standard. Radiation resistance test 6.1 The purpose of the test is to determine whether the safety glass will have obvious discoloration or reduced transmittance after being irradiated for a certain period of time. 6.2 Device 6.2.1 Irradiation light source Ozone-free quartz tube type medium pressure mercury vapor arc lamp. The axis of the lamp housing shall be vertical. The nominal size of the lamp is 360mm in length, 9.5mm in diameter, and 300mm in arc length±14mm, its operating power is 750 W±50W. Any other irradiating source equivalent to the lamps specified above may be used. In order to check the equivalence of alternative light sources, a comparison is made by measuring the energy emitted in the wavelength range of 300nm-450nm, other wavelengths being filtered out with suitable filters. Therefore, filters should be added when using alternative light sources. For safety glass whose service conditions do not correlate well with this test, the test conditions must be reconsidered. 6.2.2 Power transformers and capacitors capable of supplying a minimum starting peak voltage of 1100 V and 500 V for arc lamps (6.2.1)±50V working voltage. 6.2.3 The sample fixing and rotating device rotates around the irradiation source set at the uranium core at a speed of 1 r/min-5 r/min to ensure uniform irradiation. 6.3 Sample Size: 76mm×300mm 6.4 Test procedure Before irradiation, measure the transmittance of three test pieces according to ISO 3538, protect a part of each piece from irradiation, and then place the test piece on a device 230mm away from the lamp axis , and make it parallel to the lamp axis in the 300mm length direction. Maintain the sample temperature at 45 throughout the test±5°C. The side of the sample facing the lamp shall be the side facing outward when loading. For lamps of type 6.2.1, the irradiation time is 100h. After irradiation, measure the transmittance of the irradiation area of each sample. 6.5 Expression of results Compare the transmittance of the sample before and after irradiation of the same material. The change is expressed as a percentage. Evaluation of discoloration: -- Place the sample on a white background, and compare the difference between the irradiation area and the shaded area; -- Or measure the three primary color coordinates of the sample before and after irradiation, and calculate the color difference according to the International Commission on Illumination (CIE). 7. Heat resistance test 7.1 Test purpose To evaluate whether the appearance quality of safety glass changes significantly after being subjected to high temperature for a certain period of time. 7.2 Test procedure The dimensions shall be at least 300mm×One or more samples of 300mm are heated to 100 ℃ 0-2 ℃, hold for 2h, and then let the sample cool to room temperature naturally. If the two outer surfaces of the safety glass are made of inorganic materials, the sample can be immersed vertically in boiling water at 100 °C 0-2 °C for a specified time during the test. Take care to avoid excessive thermal shock. If the sample is cut from the product, one side of the sample should be part of one edge of the product. 7.3 Expression of results According to the above 7.2 test, observe the bubbles and other defects generated in the sample to evaluate the high temperature resistance of safety glass. Defects within 15mm from the non-cut edge, 25mm from the cut edge, or within 10mm from any crack that may occur are not considered. If the crack of the sample expands to the extent that it confuses the test results, the sample will be scrapped and another sample will be tested. Moisture resistance test 8.1 The purpose of the test is to determine whether the safety glass can withstand the action of atmospheric moisture for a certain period of time. 8.2 Test procedure The dimensions shall be at least 300 mm×One or more samples of 300mm are placed vertically in a closed container for 2 weeks, and the temperature of the container is kept at 50℃±2°C, relative humidity (95%±4) %. Under the above conditions, there should be no condensation of water vapor on the surface of the sample. If several samples are tested at the same time, appropriate gaps should be left between the samples. To prevent condensed water on the top and walls of the container from dripping onto the sample.
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