Project Introduction

UV aging test is also called UV aging test. UV aging does not simulate the full spectrum of sunlight, but it does simulate the destructive effect of sunlight. This is achieved by controlling the main radiation of fluorescent tubes in the ultraviolet band of the solar spectrum.

The experimental equipment uses fluorescent ultraviolet lamps as the light source to simulate sunlight ultraviolet rays, and can also simulate the effects of dew and rain through condensation or spraying. Samples are tested in the solar ultraviolet environment simulated by the laboratory UV ultraviolet aging test box for tens of hours or even days, which can simulate outdoor damage that may occur for months or years. Simulated outdoor takes months or years to produce Result of destruction. Reproduce the product after UV aging: including fading, discoloration, brightness reduction, chalking, cracking, blurring, embrittlement, strength reduction and oxidation.

Test purposes

The reliable data provided by UV ultraviolet aging test can make accurate correlation prediction on the weather resistance (anti-aging) of the product, and help the screening and optimization of materials and formulations.

Application range

It is mainly applicable to industries such as automobile and motorcycle, building materials, textiles, furniture and leather.

The difference between ultraviolet aging test and xenon lamp aging test

Unlike the xenon lamp aging/solar radiation aging test, UV ultraviolet aging cannot simulate the full spectrum of sunlight, and the wavelength in the electromagnetic spectrum of ultraviolet light radiates from 0.01 to 0.10 microns. Most polymers, such as plastics and rubber, are largely affected by UV aging. The long wavelength band including some colors and ultraviolet rays of fuel materials will also cause serious aging.

UV aging test stage

UV aging test can set three aging modes: light, condensation and spray

Light stage

Simulate the length of daylight in the natural environment (usually between 0.35W/m2~1.35W/m2, the summer noon's solar light intensity is about 0.55W/m2) and the test temperature (50℃~85℃) for simulation The various use environments of the products meet the testing requirements of different regions and industries.

Condensation stage

Simulate the phenomenon of fogging on the surface of the sample at night. Turn off the fluorescent UV lamp (dark state) during the condensation stage and only control the test temperature (40~60℃). The sample surface humidity is 95~100%RH.

Spray stage

Simulate the raining process by continuously spraying water on the sample surface. Since the artificial ultraviolet accelerated aging test conditions are much harsher than the natural environment, the aging damage that can only occur in the natural environment for several years can be simulated and reproduced within a few days or weeks.

Commonly used UV aging tubes

UVA-340: The main purpose is to simulate the medium and short wavelength range in the ultraviolet part of sunlight, and is generally used for the photoaging test of outdoor products.

UVA-351: The main purpose is to simulate the short and medium wavelength range in the ultraviolet part of sunlight filtered by window glass, generally used in indoor products.

UVB-313: They emit considerable radiation below 300nm, and 300nm is the nominal cut-off wavelength of solar radiation. This will cause some aging that does not happen outdoors. It is not recommended to use this lamp to simulate sunlight. This test is widely used to accelerate the durability test of materials as a qualitative comparison of two or more materials.