Overview
ISO/TS 24110:2026 is a technical specification developed by the International Organization for Standardization (ISO) that outlines a standardized method for exposing plastic specimens to artificial UV radiation while simultaneously subjecting them to a mechanical creep load. This combined exposure test is essential for evaluating the durability, aging, and long-term mechanical performance of plastics, especially for applications where materials encounter both sunlight and static or dynamic loading. The specification integrates requirements from ISO 899-1 for tensile creep testing and references ISO 4892-3 for UV radiation sources, ensuring harmonized procedures and reproducible results for material assessment.
Key Topics
- Combined UV and Creep Exposure: The test involves simultaneous application of artificial UV radiation and a uniaxial tensile creep load to plastic specimens, simulating real-world conditions where materials are both strained and weathered.
- UV Radiation Sources: Permits the use of fluorescent UVA or UVB lamps (as per ISO 4892-3) or low-pressure mercury UVC lamps; the appropriate lamp type is selected based on the target use case.
- Specimens and Setup: Test specimens are prepared according to ISO 527-2. Proper mounting ensures even exposure and accurate creep measurements. Opaque materials are recommended to minimize scatter in results.
- Measurement and Reporting: Changes in mechanical properties are measured and reported following ISO 4582, providing consistent and comparable evaluation of degradation.
- Control of Environmental Variables: Conditions such as temperature, humidity, irradiance, and test duration are carefully regulated and documented, as they significantly influence test outcomes.
- Equipment Requirements: Specifies the use of compliant test devices, radiometers, and black-panel thermometers to ensure accurate and standardized exposure parameters.
Applications
- Material Durability Testing: Useful for manufacturers and researchers seeking to understand how plastics perform under combined environmental stressors, improving product formulations and predicting service life.
- Quality Assurance: Assists in verifying the stability and mechanical integrity of plastics used in outdoor applications, such as automotive parts, building materials, and electrical enclosures.
- Regulatory Compliance: Ensures that plastic components meet international safety, reliability, and aging resistance standards, which is particularly important in industries governed by strict regulations.
- Product Development: Facilitates comparative studies between materials and aids in selecting plastics with optimal resistance to UV degradation and creep.
- Failure Analysis: Supports investigations into product failures due to environmental exposure by providing standardized methods for simulating real-world usage conditions.
Related Standards
- ISO 899-1: Plastics - Determination of creep behaviour - Part 1: Tensile creep
- ISO 4892-1 & ISO 4892-3: Plastics - Methods of exposure to laboratory light sources; Part 1: General guidance and requirements; Part 3: Fluorescent UV lamps
- ISO 527-1 & ISO 527-2: Plastics - Determination of tensile properties; Part 1: General principles; Part 2: Test conditions for moulding and extrusion plastics
- ISO 4582: Plastics - Determination of changes in colour and variations in properties after exposure to radiation sources or weathering
- IEC 60335-1: Safety of household and similar electrical appliances - General requirements (including specifications for UVC lamps)
Practical Value
Implementing ISO/TS 24110:2026 ensures reliable, reproducible, and internationally recognized testing of plastics under realistic, combined stress exposures. This standard supports the development, selection, and certification of robust plastic materials for demanding environments, directly contributing to enhanced product safety, durability, and customer satisfaction. For effective plastics testing under UV and mechanical load, adopting this specification is a critical step for manufacturers, quality assurance professionals, and researchers in the plastics industry.