GB/T 16422.2-2022 PDF EnglishUS$350.00 · In stock · Download in 9 seconds
GB/T 16422.2-2022: Plastics - Methods of exposure to laboratory light sources - Part 2: Xenon-arc lamps Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 16422.2: Historical versions
Similar standardsGB/T 16422.2-2022: Plastics - Methods of exposure to laboratory light sources - Part 2: Xenon-arc lamps---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT16422.2-2022 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 83.080.01 CCS G 31 GB/T 16422.2-2022 / ISO 4892-2.2013 Replacing GB/T 16422.2-2014 Plastics – Methods of Exposure to Laboratory Light Sources – Part 2.Xenon-Arc Lamps (ISO 4892-2.2013, IDT) Issued on. APRIL 15, 2022 Implemented on. NOVEMBER 01, 2022 Issued by. State Administration for Market Regulation; Standardization Administration of the People’s Republic of China. Table of ContentsForeword... 3 Introduction... 5 1 Scope... 6 2 Normative References... 6 3 Terms and Definitions... 7 4 Principles... 7 5 Apparatus... 8 5.1 Laboratory light source... 8 5.2 Test chamber... 10 5.3 Radiometer... 11 5.4 Black-standard/black-panel thermometer... 11 5.5 Wetting and humidity-control equipment... 11 5.6 Specimen holders... 12 5.7 Apparatus to assess changes in properties... 12 6 Test Specimens... 12 7 Exposure Conditions... 12 7.1 Radiation... 12 7.2 Temperature... 12 7.3 Relative humidity of chamber air... 13 7.4 Spray cycle... 14 7.5 Cycles with dark periods... 14 7.6 Sets of exposure conditions... 15 8 Procedure... 16 8.1 General... 16 8.2 Mounting the test specimens... 16 8.3 Exposure... 16 8.4 Measurement of radiant exposure... 16 8.5 Determination of changes in properties after exposure... 17 9 Exposure Report... 17 Annex A (Informative) Filtered Xenon-Arc Radiation - Relative Spectral Irradiance 18 Annex B (Normative) Additional Exposure Cycles... 20 Annex C (Informative) Classification of Daylight Filter... 22 Bibliography... 25ForewordThis document was drafted as per the rules specified in GB/T 1.1-2020 Directives for Standardization – Part 1.Rules for the Structure and Drafting of Standardizing Documents. This Document is Part 2 of GB/T 16422 Plastics – Methods of Exposure to Laboratory Light Sources. GB/T 16422 has published the following parts. --- Part 1.General Guidance; --- Part 2.Xenon-Arc Sources; --- Part 3.Fluorescent UV Lamps; --- Part 4.Open Flame Carbon Arc Lamp. This Document replaced GB/T 16422.2-2014 Plastics – Methods of Exposure to Laboratory Light Sources – Part 2.Xenon-Arc Sources. Compared with GB/T 16422.2-2014, the major technical changes of this Document are as follows besides the structural adjustments and editorial modifications. a) Add the statement about spectral irradiance "2nm incremental measurement" in footnote a of "Table 1" and footnote a of "Table 2" (see Tables 1 and 2 of this Edition); b) Add suggestions for measuring the maximum surface temperature device (see 5.4 of this Edition); c) Change the exposure cycle in Table 3; only retain the original three exposure cycles; delete two exposure cycles with a black standard temperature of (100±3) °C in Method A (see Table 3 of this Edition; Table 3 of 2014 Edition); and adjust the other three exposure cycles that do not control the temperature and relative humidity of the test chamber to Table B.1 (see Table B.1 of this Edition; Table 3 of 2014 Edition); d) Change the exposure cycle in Table 4; only retain the original three exposure cycles; delete the two exposure cycles with black panel temperature of (89±3) °C in Method A (see Table 4 of this Edition; Table 4 of 2014 Edition); and adjust the other three exposure cycles that do not control the temperature and relative humidity of the test chamber and add the exposure cycles of the two Methods A to Table B.2 (see Table B.2 of this Edition; Table 4 of 2014 Edition); e) Change the provisions on the setting of exposure conditions; and point out that there is no correlation between the black standard temperature and the black panel temperature and the conditions for the use of the black standard thermometer instead of the black panel thermometer (see 7.6 of this Edition; 6.6 of 2014 Edition); f) Add the Annex "More Exposure Cycles" (see Annex B of this Edition). This Document equivalently adopts ISO 4892-2.2013 Plastics – Methods of Exposure to Laboratory Light Sources – Part 2.Xenon-Arc Lamps. This Document adds a Clause of “Terms and Definitions”. This Document made the minimum editorial modifications. --- Incorporate the amendments of ISO 4892-2.2013/Amd.1.2021, and the outer margins of the terms involved are marked with vertical double lines (‖). Please note some contents of this Document may involve patents. The issuing agency of this Document shall not assume the responsibility to identify these patents. This Document was proposed by China Petroleum and Chemical Industry Federation. This Document shall be under the jurisdiction of National Technical Committee on Plastics of Standardization Administration of China (SAC/TC 15). Drafting organizations of this Document. Guangzhou Synthetic Materials Research Institute Co., Ltd.; Shaanxi Yanchang Jingwei New Material Technology Industrial Park Co., Ltd.; Shandong Dawn Polymer Co., Ltd.; Orinko Advanced Plastics Co., Ltd.; Beijing Tiangang Auxiliary Co., Ltd.; Wanhua Chemical Group Co., Ltd.; Suzhou EMTEK Co., Ltd.; Atlas Material Testing Technology LLC.; Qingdao Hengjia Precision Technology Co., Ltd.; SAIC- GM-Wuling Automobile; Shenzhen NTEK Testing Technology Co., Ltd.; Suzhou Sunway Polymer Co., Ltd.; and Q-Lab Corporation Shanghai Office. Chief drafting staffs of this Document. Wang Haojiang, Tie Wenan, Zhao Lei, Wang Fei, Wang Chanyao, Liu Gang, Yang Li, Xie Xiao, Cheng Ge, Lu Bo, Lan Xian, Zhou Yebi, Wang Haili, Zhang Heng, Tian Xiaoyan, Chen Guoyang, and Chen Xin. The historical editions replaced by this Standard are as follows. --- It is first-time published as GB/T 9344-1988 in 1988; --- It is first-time revised as partial publication in 1999; this Document corresponds to GB/T 16422.2-1999; it is second-time revised in 2014; --- It is third-time revised hereby.1 ScopeThis Document specifies the test method for the exposure of specimens in the test equipment equipped with xenon arc lamp, heat and humidity. The test equipment simulates the actual use environment of total solar radiation or solar radiation through window glass, so that the material produces effects similar to natural aging.2 Normative ReferencesThe provisions in following documents become the essential provisions of this Document through reference in this Document. For the dated documents, only the versions with the dates indicated are applicable to this Document; for the undated documents, only the latest version (including all the amendments) is applicable to this Document. ISO 4582 Plastics – Determination of Changes in Color and Variation in Properties after Exposure to Glass-Filtered Solar Radiation, Natural Weathering or Laboratory Radiation Sources3 Terms and DefinitionsFor the purposes of this Document, the terms and definitions given in ISO 4892-1 apply.4 PrinciplesIt is recommended that a similar material of known performance (a control) be exposed simultaneously with the test specimens to provide a standard for comparative purposes. Intercomparison of results obtained from specimens exposed in different apparatus should not be made unless an appropriate statistical relationship has been established between the apparatuses for the particular material exposed.5 ApparatusFilters are used to filter xenon-arc emissions in order to simulate daylight (CIE Publication No. 85.1989, Table 4). The minimum and maximum levels of the relative spectral irradiance in the UV wavelength range are given in Table 1 (see also Annex A). The irradiance at any position in the area used for specimen exposure shall be at least 80 % of the maximum irradiance. Requirements for periodic repositioning of specimens when this requirement is not met are described in ISO 4892-1.6 Test SpecimensMake reference to ISO 4892-1.7 Exposure Conditions7.1 Radiation For referee purposes, Table 3 and Table B.1 specify black-standard temperatures. For normal work, black-panel thermometers may be used in place of black-standard thermometers (see Table 4 and Table B.2). Exposures can be run either with the chamber air temperature controlled at a specified level (see Table 3 and Table 4) or allowing the air temperature to find its own level (see Table B.1 and Table B.2).8 ProcedureBefore placing the specimens in the test chamber, be sure that the apparatus is operating under the desired conditions (see Clause 7). Programme the apparatus with the selected conditions to operate continuously for the required number of cycles at the selected exposure conditions. Maintain these conditions throughout the exposure, keeping any interruptions to service the apparatus and to inspect the specimens to a minimum.9 Exposure ReportMake reference to ISO 4892-1. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. |
