ISO/TS 4767:2024
Plastics
- Standard No.
- ISO/TS 4767:2024
- Release Date
- 2024
- Published By
- International Organization for Standardization (ISO) IX / ISO
- Latest
- ISO/TS 4767:2024
- Introduction
Analysis of the core content of the standard
ISO/TS 4767:2024 specifies for the first time the accelerated light aging test method for plastics using electrodeless plasma lamp as the radiation source. This technology generates ultraviolet radiation through radio frequency excited gas discharge, and its spectral distribution simulates the UV band of sunlight (290-400nm), which is particularly suitable for evaluating the short-term photodegradation behavior of materials.
Comparison of key test parameters
Parameter Standard requirements Allowance Measurement method UV irradiance 300 W/m² ±15 W/m² Broadband measurement (300-400nm) Black panel temperature 70°C ±3°C ISO 4892-1 Irradiance uniformity ≥90% maximum value - Multi-point scanning method
Spectral characteristics requirements
The standard strictly limits the UV spectral distribution of plasma lamps (see Table 1):
- 290-320nm band: accounts for 5.9±2.1% of the total UV energy
- 320-360nm band: accounts for 40.4±4.6%
- 360-400nm band: accounts for 53.8±5.5%
Compared with the CIE 241 standard solar spectrum, the UV/visible light energy ratio of the plasma lamp is 11%/89%, which needs to be adjusted by a 300nm cut-off filter.
Equipment Technical Requirements
5.1 Laboratory Radiation Source
Electrodeless Plasma LampShould meet the following requirements:
- Use the principle of gas discharge in a glass bulb to avoid metal electrode contamination
- Irradiation intensity is continuously adjustable to meet the requirements of different acceleration factors
- Equipped with a spectrum monitoring system to ensure compliance with the distribution requirements in Table 1
5.2 Test Chamber
Must be constructed of inert materials to ensure:
- Internal reflectivity ≤5%
- Temperature control accuracy ±1°C
- Sample holder is corrosion-resistant (316 stainless steel is recommended)
Implementation Recommendations
Sample Preparation
Refer to ISO 4892-1 requires and recommends:
- At least 3 parallel samples per group
- Use aluminum labels for edge marking
- Transparent samples need to specify the backing material (usually anodized aluminum)
Process control
Key control points:
- Record black panel temperature fluctuations daily
- Verify spectral irradiance distribution weekly
- Rotate sample position every 50 hours (highly reflective materials require more frequent use)
Technology evolution analysis
Compared with traditional xenon lamp aging test (ISO 4892-2), plasma radiation source has:
Comparison items Plasma light source Xenon lamp light source UV intensity Up to 500W/m² Usually ≤60W/m² Spectral stability ±2%/1000h ±5%/500h Maintenance cycle ≥5000 hours Replace lamp after 1500 hours This standard fills the gap in the highly accelerated UV aging test method, and is particularly suitable for scenes where rapid assessment of weather resistance is required, such as automotive interiors and photovoltaic backplanes.
ISO/TS 4767:2024 Referenced Document
- ISO 4582 Plastics — Determination of changes in colour and variations in properties after exposure to glass-filtered solar radiation, natural weathering or laboratory radiation sources*， 2025-09-02 Update
- ISO 4892-1 Plastics — Methods of exposure to laboratory light sources — Part 1: General guidance and requirements*， 2024-10-01 Update
- ISO 9370 Plastics - Instrumental determination of radiant exposure in weathering tests - General guidance and basic test method
ISO/TS 4767:2024 history
- 2024 ISO/TS 4767:2024 Plastics
- 2023 ISO/TS 4767:2023 Plastics
