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GB/T 5137.3-2020 English PDF (GBT5137.3-2020)

GB/T 5137.3-2020 English PDF (GBT5137.3-2020)

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GB/T 5137.3-2020: Test methods of safety glazing materials used on road vehicles -- Part 3: Radiation, high temperature, humidity, fire and simulated weathering resistance tests

This Part of GB/T 5137 specifies the methods of radiation, heat, humidity, fire and simulated weathering resistance tests for safety glazing materials used on road vehicles. This Part applies to the tests of safety glazing materials used on road vehicles.
GB/T 5137.3-2020
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 43.040.60
T 34
Replacing GB/T 5137.3-2002
Test methods of safety glazing materials used on road
vehicles - Part 3: Radiation, high temperature, humidity,
fire and simulated weathering resistance tests
(ISO 3917:2016, Road vehicles - Safety glazing materials - Test methods for resistance to radiation, high temperature, humidity, fire and simulated weathering, MOD)
ISSUED ON: MARCH 31, 2020
IMPLEMENTED ON: FEBRUARY 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 3
1 Scope ... 6
2 Normative references ... 6
3 Terms and definitions ... 6
4 Test conditions ... 7
5 Radiation resistance test ... 7
6 Heat resistance test ... 9
7 Humidity resistance test ... 10
8 Fire resistance test ... 11
9 Simulated weathering resistance test ... 12
Annex A (Informative) Structural changes of this Part compared with ISO 3917:2016 ... 16
Annex B (Informative) Technical differences between this Part and ISO
3917:2016 and their causes ... 18
Test methods of safety glazing materials used on road
vehicles - Part 3: Radiation, high temperature, humidity,
fire and simulated weathering resistance tests
1 Scope
This Part of GB/T 5137 specifies the methods of radiation, heat, humidity, fire and simulated weathering resistance tests for safety glazing materials used on road vehicles.
This Part applies to the tests of safety glazing materials used on road vehicles. 2 Normative references
The following documents are indispensable for the application of this document. For the dated references, only the editions with the dates indicated are applicable to this document. For the undated references, the latest edition (including all the amendments) are applicable to this document.
GB/T 5137.1 Test methods of safety glazing materials used on road vehicles - Part 1: Mechanical properties tests (GB/T 5137.1-2020, ISO 3537:2015, MOD)
GB/T 5137.2 Test methods of safety glazing materials used on road vehicles - Part 2: Optical properties tests (GB/T 5137.2-2020, ISO 3538:1997, MOD) GB 8410 Flammability of automotive interior materials
GB 9656 Safety glazing materials for road vehicles
GB/T 16422.2-2014 Plastics - Methods of exposure to laboratory light
sources - Part 2: Xenon-arc sources (ISO 4892-2:2006, IDT)
QC/T 1119 Road vehicles - Glazing materials - Terminology (QC/T 1119-
2019, ISO 3536:2016, MOD)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in QC/T 1119 apply.
The test uses a special flat test piece or a test piece cut from a flat part of the product as a sample. When cutting the test piece, if the product is safety glazing material for the front windshield, it shall be cut from the test area for visible light transmittance measurement. Moreover, one short side of the test piece shall be part of the upper edge of the test area of visible light transmittance. The test area of visible light transmittance shall meet the requirements of GB 9656. If the product is safety glazing material other than the front windshield, one short side of the test piece shall be part of the original side of the upper part of the product.
5.4 Test procedure
5.4.1 The sample shall be stored under the conditions specified in Clause 4 for 4 h before the test.
5.4.2 Before radiation, according to the method specified in GB/T 5137.2, determine the visible light transmittance of the sample. Protect a part of each sample from radiation; then, place the sample on the device 230 mm away from the lamp axis and make it parallel to the lamp axis in the length direction. Throughout the test, maintain the sample temperature at 45 ??C??5 ??C. The side of the sample facing the lamp shall be the side facing outwards when mounted on the vehicle. The radiation time is 100 h.
5.4.3 After radiation, determine the visible light transmittance of the radiation area of each sample.
5.4.4 Compare the visible light transmittance of the same sample before and after radiation. For photochromic or dimming glass, respectively, it shall measure the lowest and highest visible light transmittance of the sample before and after radiation. Compare the lowest visible light transmittance of the same sample before and after radiation; and, compare the highest visible light transmittance of the same sample before and after radiation.
5.4.5 After radiation, it shall observe the discoloration of the sample: PLACE the sample on a white background; compare the difference between the
radiation area and the shielding area. It is also possible to determine the three- primary color coordinate system of the sample before and after radiation; calculate the color difference according to the provisions of the International Commission on Illumination (CIE); and, record the color difference before and after radiation.
5.4.6 While using a white background to check, observe and record changes in appearance such as discoloration, blistering, and turbidity.
25 mm from the cutting edge, or 10 mm from any cracks that may be generated are not considered.
7 Humidity resistance test
7.1 Test purpose
To determine whether the safety glazing material can withstand the effects of atmospheric moisture for a certain period of time.
7.2 Apparatus
Humidity resistance test chamber.
The humidity resistance test chamber shall be kept closed; and, during the test, the temperature shall be kept constant at 50 ??C??2 ??C and the relative humidity at 95%??4%. In the device, measures shall be taken to avoid any condensation of water vapor on the surface of the sample, and to prevent condensate on the top and wall surfaces inside the test chamber from dripping onto the sample. 7.3 Sample
Size: At least 300 mm ?? 300 mm.
The test uses a special flat test piece or a test piece cut from a flat part of the product as a sample. When applicable, the product can also be a sample. When cutting the test piece, it shall make sure that, at least one side of the test piece is part of the original side of the product.
7.4 Test procedure
7.4.1 Rigid plastics shall be placed at 23 ??C??2 ??C, relative humidity 50%??5% conditions for 48 h before the test. Except for rigid plastics, for other types of glazing materials, the samples shall be stored under the conditions specified in Clause 4 for 4 h before the test.
7.4.2 The sample is placed vertically in the humidity resistance test chamber for 336 h (2 weeks). The temperature of the test chamber is maintained at 50 ??C??2 ??C. The relative humidity is 95%??4%. If several samples are tested at the same time, appropriate gaps shall be left between the samples.
7.4.3 After the test is completed, the laminated glass shall be placed under the conditions of Clause 4 for 2 h before being evaluated. Film-mounted glass, plastic-glass composite materials, and rigid plastics shall be placed for 48 h before being evaluated.
b) The frequency of the power supply device or transformer shall be 50 Hz or 60 Hz.
c) The simulated weathering resistance test apparatus shall be able to
control and measure the following parameters:
1) Irradiance;
2) Blackboard temperature;
3) Spray time;
4) Test progress and number of test cycles.
d) This apparatus is made of inert materials, which will not contaminate the test water.
e) The irradiance shall be measured on the surface of the sample and
controlled as recommended by the manufacturer.
f) It shall be able to measure or calculate the total ultraviolet radiation energy (J/m2); and, consider it as the main basis for the test solarization.
g) The test apparatus shall be able to maintain continuous illumination and intermittent spraying.
9.3 Sample
Size: 130 mm ?? 40 mm. In addition to the test sample, a parallel sample shall be prepared for comparison.
The test uses a special flat test piece or a test piece cut from a flat part of the product as a sample.
9.4 Test procedure
9.4.1 Solarization conditions
9.4.1.1 Each sample shall face the radiation light source with the side facing outwards when mounted on a real vehicle.
9.4.1.2 During the test, it shall be ensured that, the total ultraviolet radiation energy received by the surface of the sample facing the radiation light source is 500 MJ/m2.
9.4.1.3 During the test, it shall be ensured that, the difference between the minimum and maximum radiation intensity of the surface of the sample facing the radiation light source and the average value of the two does not exceed ??10% of the average value.
9.4.1.4 In the circulating drying stage, the temperature in the solarization room shall be controlled by sufficient circulating air, to ensure a constant blackboard temperature.
9.4.1.5 In the xenon-arc lamp device, the indication value of blackboard temperature shall be 70 ??C??3 ??C. The blackboard thermometer shall be
installed on the sample holder. The reading shall be the hottest value produced by light radiation.
9.4.1.6 The humidity in the drying stage shall be kept within the range of 50%??5%.
9.4.1.7 In the deionized water used in the spraying stage, the silica solid impurity content shall be less than 1 ??g/g. No permanent residues or
precipitates, which have an influence on the subsequent measurement, shall be left on the sample.
9.4.1.8 The pH of the water shall be controlled between 6.0~8.0. The
conductivity shall be less than 5 ??S/cm.
9.4.1.9 The water used in the solarization device shall enter the system at the same temperature as the ambient water.
9.4.1.10 Sufficient water shall, in the form of a mist, be sprayed evenly onto the surface of the sample; and, the surface shall be immediately wetted. The water mist shall be sprayed directly on the side of the sample facing the light source. It is not allowed to recycle the spray water or soak the sample in water. 9.4.1.11 The sample shall rotate around the center of the light source, to ensure uniform irradiance; or use other radiation methods, which can ensure uniform irradiance. The sample holder shall be filled with samples or substitutes, to ensure an even temperature distribution. The back of the sample on the sample holder shall be exposed to the radiation room environment; but the reflected light from the room wall is not allowed to fall to the back of the sample. If necessary, without affecting the free circulation of air on the surface of the sample, the sample can be backed to block this reflected light.
9.4.1.12 It shall regularly use detergent and clean water to wash the xenon lamp filter. According to the service life of the xenon lamp, the xenon lamp shall be replaced regularly.
9.4.2 Solarization process
9.4.2.1 Rigid plastics shall be placed at 23 ??C??2 ??C, relative humidity 50%??5%

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