Application analysis of ultraviolet accelerated weathering Test Chamber in PEVA film

application background

The main purpose of UV aging test for PEVA film (polyethylene vinyl acetate film) is to evaluate its weather resistance and performance stability to determine its service life and performance in outdoor environments. The UV aging test can simulate the effect of ultraviolet radiation in sunlight on PEVA film.

Here are some specific reasons:

1. Evaluate weather resistance: PEVA films are commonly used in outdoor applications such as awnings, camping tents, waterproof coverings, etc. In outdoor environments, PEVA films are affected by factors such as ultraviolet light, temperature changes, humidity, and atmospheric chemicals. The UV aging test can simulate these factors and evaluate the weather resistance of PEVA film under actual use conditions, including aging resistance, UV attenuation resistance and embrittlement resistance.

2. Evaluation of performance stability: UV radiation will have adverse effects on the chemical composition and physical properties of PEVA films, such as color changes, gloss reduction, strength loss and embrittlement. Through the UV aging test, the performance stability of PEVA film can be evaluated to understand whether its performance will be degraded, damaged or invalidated in long-term use.

3. Guide material selection and product design: Through the results of UV aging test, we can understand the performance change of PEVA film under ultraviolet radiation, so as to guide material selection and product design, so as to improve its weather resistance and performance stability.

4. Quality control and product certification: UV aging test can be used as a part of PEVA film quality control to verify whether the product meets the relevant quality standards and certification requirements.

5. Extend service life and reduce maintenance cost: By evaluating the weather resistance and performance stability of PEVA film, its service life and maintenance cycle can be determined, thereby prolonging the service life of the film, reducing the frequency of maintenance and replacement, and reducing maintenance costs.

Industry Standard

The UV aging test of PEVA film usually refers to the following industry standards:

1. ASTM D4329: A standard test method published by the American Society for Testing and Materials (ASTM) for evaluating the UV aging properties of plastic materials. The standard covers different types of plastic materials, including PEVA films.

2. ASTM D4799: Standard test method published by ASTM for evaluating the weatherability and UV radiation stability of polyethylene vinyl acetate copolymer films.

3. ISO 4892-3: Standard for UV radiation aging tests of coatings and varnishes issued by the International Organization for Standardization (ISO), Part 3 of which is applicable to UV aging tests of plastic materials.

4. GB/T 16585: Standards on plastic aging test methods issued by the National Standardization Administration of CHINA, including requirements and methods for UV aging tests.

These standards provide guidance and specifications for UV aging tests on PEVA films, including requirements for test equipment, test methods, test conditions and duration. Depending on the specific application and requirements, reference may also be made to other specific industry standards or internal company specifications.

Note that exact standard requirements may vary depending on region, industry, and specific product needs. Therefore, before carrying out the UV aging test of PEVA film, you should carefully read and follow the applicable standards and specifications to ensure the accuracy and comparability of the test.

The following are some specific application cases of PEVA film UV aging test:

1. Awning: PEVA film is often used in car awnings or outdoor awnings. Through the UV aging test, the weather resistance and color stability of PEVA film under sunlight exposure can be evaluated to ensure that it can withstand UV radiation and other environmental factors for a long time without degradation or discoloration.

2. Camping tents: PEVA films are also commonly used as outer covering materials for camping tents. Through the UV aging test, the weather resistance and durability of the PEVA film in the outdoor environment can be evaluated to ensure that it can withstand long-term sun exposure, rain and wind without damage or deformation.

3. Waterproof covering: PEVA film is widely used in waterproof covering materials, such as rain capes, pool coverings, etc. Through the UV aging test, the weather resistance and waterproof performance of the PEVA film in the outdoor environment can be evaluated to ensure that it can maintain a good waterproof effect for a long time.

4. Packaging materials: PEVA film is also widely used in the packaging industry, such as food packaging, pharmaceutical packaging, etc. Through the UV aging test, the weather resistance and physical properties of PEVA film under light and oxygen exposure can be evaluated to ensure that it will not degrade, deform or affect the quality and safety of the package during the packaging process.

operation method

Steps and precautions for testing the aging resistance of PEVA film in a UV aging Test Chamber:

1. Sample preparation: Select a PEVA film sample of appropriate size for testing. Ensure that samples are prepared in accordance with relevant standards or specifications.

2. Test condition setting: According to the required test conditions and standard requirements, set the parameters of the UV aging Test Chamber, including radiation intensity, temperature, humidity, etc. Ensure that the Test Chamber settings comply with relevant specifications and requirements.

3. Sample placement: Place the PEVA film sample on the sample holder in the Test Chamber to ensure that the sample is flat, free of bubbles and wrinkles, and avoid mutual interference between samples.

4. Test run: Start the UV aging Test Chamber and let the samples be exposed to UV radiation and other environmental factors under the set conditions. According to the standard requirements, set the appropriate test time, usually hundreds to thousands of hours.

5. Regular observation: Regularly observe the changes of PEVA film samples, including color changes, gloss changes, surface cracks, changes in physical properties, etc. Document any visible changes or damage.

6. End of Test and Evaluation: After the test is completed, samples are removed for evaluation and testing. The physical and chemical properties of PEVA film samples can be tested to determine their aging resistance.

When carrying out UV aging test, the following matters need to be paid attention to:

• Make sure that the UV aging Test Chamber equipment is working properly, and operate in accordance with the operation manual and safety requirements.

• Check and record the temperature, humidity, radiation intensity and other parameters of the Test Chamber to ensure its stability and accuracy.

• Ensure that the selection, preparation and placement of samples comply with standards and requirements.

• Regularly inspect and maintain Test Chamber equipment to ensure proper operation and accuracy.

• Pay attention to observe and record any changes in the sample during the test for subsequent evaluation and analysis.

Through the UV aging test, it can provide important information about the weather resistance and performance stability of the PEVA film in the exposed environment, helping to ensure that the film can maintain its function and reliability for a long time under various climatic conditions.