GB/T 16422.3-2014 in English

《GB/T 16422.3-2014塑料 实验室光源暴露试验方法 第3部分：荧光紫外灯》由TC15（全国塑料标准化技术委员会）归口，TC15SC5（全国塑料标准化技术委员会老化方法分会）执行，主管部门为中国石油和化学工业联合会。
GB/T16422的本部分规定了试样在配有荧光紫外辐射、热和水的试验设备中进行暴露的试验方法,该方法用于模拟材料在实际使用环境中暴露于日光或窗玻璃过滤后日光下发生的自然老化效果。
本部分适用于在荧光紫外灯光源暴露条件下塑料的耐候性评定以及塑料间的耐候性对比试验。
试样在可控条件(温度、湿度和/或水)下暴露于荧光紫外灯下,并通过不同类型荧光紫外灯来满足不同材料的试验需要。
特定材料的试样制备和结果评估参考其他的国家标准。
总则在 GB/T16422.1中给出。
注:色漆、清漆和其他涂料的荧光紫外灯下暴露在 GB/T23987中有描述。

1 Scope

This part of GB/T 16422 specifies methods for exposing specimens to fluorescent UV radiation, heat and water in apparatus designed to reproduce the weathering effects that occur when materials are exposed in actual end-use environments to daylight, or to daylight through window glass.

This part is applicable to the evaluation of weather resistance of plastics and the comparison test of weather resistance between plastics under the condition of fluorescent UV lamp light source exposure.

The specimens are exposed to fluorescent UV lamps under controlled environmental conditions (temperature, humidity and/or water). Different types of fluorescent UV lamp may be used to meet all the requirements for testing different materials.

Specimen preparation and evaluation of the results are covered in other national standards for specific materials.

General guidance is given in GB/T 16422.1.

Note: Fluorescent UV lamp exposures for paints, varnishes and other coatings are described in GB/T 23987.

2 Normative References

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 4582 Plastics — Determination of Changes in Color and Variations in Properties after Exposure to Daylight under Glass, Natural Weathering or Laboratory Light Sources
ISO 4892-1 Plastics — Methods of Exposure to Laboratory Light Sources — Part 1: General Guidance

3 Principle

3.1 Fluorescent UV lamps, when properly maintained, can be used to simulate the spectral irradiance of daylight in the ultraviolet (UV) region of the spectrum.

Foreword II
1 Scope
2 Normative References
3 Principle
4 Apparatus
5 Test Specimens
6 Test Conditions
7 Procedure
8 Test Report
Annex A (Informative) Spectral Distribution of Radiation for Typical Fluorescent UV Lamps
Bibliography