ISO 4892-1:2016

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ISO 4892-1:2016标准以“塑料—暴露于实验室光源的方法”为总标题，由以下部分组成：

第1部分：通则;

第2部分：氙弧灯;

第3部分：荧光紫外灯;

第4部分：开放式碳弧灯，紫外光老化试验箱。

ISO 4892-1:2016在后续部分详细描述了和暴露操作方法的选择有关的信息和指导。它还描述了用于将塑料暴露于实验室光源的设备的一般性能要求。有关人工加速风化或人造加速辐射装置生产性能要求的信息。

在ISO 4892的这一部分中，“光源”一词是指发出紫外线辐射、可见辐射、红外线辐射或这些辐射的任何组合的辐射源。

ISO 4892-1:2016还提供了从人工加速老化或人工加速辐射暴露数据的解释信息。在ISO 4582中给出了关于塑料暴露后的性能变化和报告这些结果变化的方法的更具体的信息。

ISO 4892-1:2016英文简介

ISO 4892-1:2016 provides information and general guidance relevant to the selection and operation of the methods of exposure described in detail in subsequent parts. It also describes general performance requirements for devices used for exposing plastics to laboratory light sources. Information regarding performance requirements is for producers of artificial accelerated weathering or artificial accelerated irradiation devices.

NOTE In this part of ISO 4892, the term "light source" refers to radiation sources that emit V radiation, visible radiation, infrared radiation or any combination of these types of radiation.

ISO 4892-1:2016 also provides information on the interpretation of data from artificial accelerated weathering or artificial accelerated irradiation exposures. More specific information about methods for determining the change in the properties of plastics after exposure and reporting these results is given in ISO 4582.

1 Scope

This part of ISO 4892 provides information and general guidance relevant to the selection and operation of the methods of exposure described in detail in subsequent parts. It also describes general performance requirements for devices used for exposing plastics to laboratory light sources. Information regarding performance requirements is for producers of artificial accelerated weathering or artificial accelerated irradiation devices.

NOTE In this part of ISO 4892, the term “light source” refers to radiation sources that emit V radiation, visible radiation, infrared radiation or any combination of these types of radiation.

This part of ISO 4892 also provides information on the interpretation of data from artificial accelerated weathering or artificial accelerated irradiation exposures. More specific information about methods for determining the change in the properties of plastics after exposure and reporting these results is given in ISO 4582.

2 Normative references

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

ISO 291, Plastics — Standard atmospheres for conditioning and testing

ISO 293, Plastics — Compression moulding of test specimens of thermoplastic materials

ISO 294-1, Plastics — Injection moulding of test specimens of thermoplastic materials — Part 1: General principles, and moulding of multipurpose and bar test specimens

ISO 294-2, Plastics — Injection moulding of test specimens of thermoplastic materials — Part 2: Small tensile bars

ISO 294-3, Plastics — Injection moulding of test specimens of thermoplastic materials — Part 3: Small plates

ISO 295, Plastics — Compression moulding of test specimens of thermosetting materials

ISO 2818, Plastics — Preparation of test specimens by machining

ISO 3167, Plastics — Multipurpose test specimens

ISO 4582, Plastics — Determination of changes in colour and variations in properties after exposure to daylight under glass, natural weathering or laboratory light sources

ISO 4892-2, Plastics — Methods of exposure to laboratory light sources — Part 2: Xenon-arc lamps

ISO 4892-3, Plastics — Methods of exposure to laboratory light sources — Part 3: Fluorescent V lamps

ISO 4892-4, Plastics — Methods of exposure to laboratory light sources — Part 4: Open-flame carbon-arc lamps

ISO 9370, Plastics — Instrumental determination of radiant exposure in weathering tests — General guidance and basic test method

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

NOTE Definitions of other terms that are related to weathering tests are found in Reference [2].

3.1control

material which is of similar composition and construction to the test material and which is exposed at the same time for comparison with the test material

Note 1 to entry: An example of the use of a control material would be when a formulation different from one currently being used is being evaluated. In that case, the control would be the plastic made with the original formulation.

3.2file specimen

portion of the material to be tested which is stored under conditions in which it is stable and which is used for comparison between the exposed and unexposed states

3.3artificial accelerated weathering

exposure of a material in a laboratory weathering device to conditions which may be cyclic and intensified compared with those encountered in outdoor or in-service exposure

Note 1 to entry: This involves a laboratory radiation source, heat and moisture (in the form of relative humidity and/or water spray, condensation or immersion) in an attempt to produce more rapidly the same changes that occur in outdoor exposure.

Note 2 to entry: The device may include means for control and/or monitoring of the light source and other weathering parameters. It may also include exposure to special conditions, such as acid spray to simulate the effect of industrial gases.

3.4artificial accelerated irradiation

exposure of a material to a laboratory radiation source intended to simulate window-glass-filtered solar radiation or radiation from interior lighting sources and where specimens may be subjected to relatively small changes in temperature and relative humidity in an attempt to produce more rapidly the same changes that occur when the material is used in an indoor environment

Note 1 to entry: These exposures are commonly referred to as fading or lightfastness tests.

3.5reference material

material of known performance

3.6reference specimen

portion of the reference material that is to be exposed