The purpose of the UV aging test is to evaluate the weather resistance of agricultural membranes and determine their service life and performance under long-term UV radiation and climatic conditions. UV radiation has the following effects on agricultural membranes:
Degradation: Ultraviolet radiation can cause the polymer chain in the agricultural film to break and degrade, resulting in brittleness and strength reduction of the material.
Fading: UV radiation can cause the color of the agricultural film surface to fade or fade.
Changes in physical properties: Ultraviolet radiation can change the physical properties of agricultural films, such as tensile strength, elongation at break and impact resistance.
Changes in optical properties: UV radiation will reduce the light transmittance of agricultural films, affecting photosynthesis and crop growth.
The UV light aging Test Chamber can be used to test the aging resistance of agricultural films, simulate solar irradiation, and test the durability of agricultural films under light irradiation.
Industry standard
The industry standards that meet the UV aging test of agricultural film mainly include the following:
ISO 4892-3: This standard specifies methods and procedures for UV radiation aging tests of plastic materials under laboratory conditions, which can be used for the testing of agricultural membranes.
ASTM G155: This standard specifies the UV radiation aging test method for materials under outdoor exposure conditions and is suitable for evaluating the weather resistance of agricultural membranes.
Specific application
Greenhouse membrane: Greenhouse membrane is often exposed to ultraviolet radiation and climate change. Ultraviolet aging test can evaluate its weather resistance and expected service life.
Plastic film: Plastic film is used to cover farmland and protect crops. Ultraviolet aging test can evaluate its durability and anti-aging performance.
Packing film: The film used for packaging agricultural products also needs to be subjected to ultraviolet radiation. The ultraviolet aging test can evaluate its durability and physical performance changes.
Test method
The use of ultraviolet aging test box to test the aging resistance of agricultural films can generally be carried out according to the following steps:
According to the characteristics and size of the actual agricultural film, prepare samples that meet the requirements.
According to the test requirements or applicable standards, set the ultraviolet radiation intensity, temperature, humidity and other test conditions.
Place the agricultural film sample on the sample stage in the ultraviolet aging Test Chamber to ensure that the sample is exposed to the light source of ultraviolet radiation.
According to the set test conditions, let the sample be continuously exposed to ultraviolet radiation and other test conditions for a certain period of time.
Periodically observe and evaluate the changes of samples, including color changes, surface conditions, changes in physical properties, etc., and record and record relevant data.
The aging resistance and life expectancy of agricultural films were evaluated based on the sample changes and performance losses observed during the test.
NBChao Tip: The specific test steps and parameter settings should be adjusted and confirmed according to the test standards, the characteristics of agricultural films and actual needs. It is recommended to refer to the applicable standards and the instructions for the use of related equipment before conducting the ultraviolet aging test to ensure the accuracy and reliability of the test.
