GB/T 15596-2021 in English
VALIDPlastics—Determination of changes in colour and variations in properties after exposure to glass-filtered solar radiation, natural weathering or laboratory radiation sources
- Issued on:2021-08-20
- Implemented on:2022-03-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$243.00
《GB/T 15596-2021塑料 在玻璃过滤后太阳辐射、自然气候或实验室辐射源暴露后颜色和性能变化的测定》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。
Introduction
Analysis of the core content of the standard
| Test items | 2009 version | Main changes in the 2021 version |
|---|---|---|
| Standard name | Determination of sunlight exposure of plastics under glass | Determination of radiation exposure of plastics after glass filtering |
| Referenced standards | Referenced ISO105-A series | Newly added ISO11664 colorimetry series standards |
| Test methods | Basic color determination | Add CIE1976L*a*b* color space analysis |
Key technical points
1. Color change measurement
When using the spectrophotometer, the following must be met:
- CIE1964 standard chromaticity observer (10° field of view)
- D65 standard light source is preferred
- Transparent materials are in accordance with CIE No.15 requirements
2. Mechanical Properties Test
| Performance Index | Test Standard | Sensitivity |
|---|---|---|
| Tensile Strength | ISO527 | Medium |
| Elongation at Break | ISO527 | High |
| Impact Strength | ISO179 | Extremely High |
Implementation Recommendations
- Sample preparation: At least 5 parallel samples per group, destructive testing requires separate samples
- Data recording: Must include the mean value ± standard deviation (e.g. ΔE*=3.2±0.4)
- Environmental control: State adjustment is strictly in accordance with ISO291's 23℃/50%RH conditions
- Instrument calibration: The colorimeter needs to be calibrated with NIST traceability every year
Technology evolution analysis
Main technological breakthroughs of the 2021 version:
- Introduction of ISO10640 infrared spectroscopy to analyze chemical aging mechanisms
- Improvement of data processing formulas for non-destructive testing (see Appendix A)
- Add the performance degradation curve analysis method shown in Figure A.1
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