Standards
- - GB/T 14522-93
- - ASTM G 154
- - ISO 4892-1
- - ISO 11507
- - ASTMD 4329
Product Usage
TL-UV series UV weathering chambers can simulate the damage caused by sunlight, rain, and dew. UV uses fluorescent ultraviolet UV lamps to simulate the effect of sunlight, and uses condensed moisture to simulate rain and dew. The tested materials are placed in a cycle of alternating light and moisture at a certain temperature for testing. UV can reproduce the damage caused by months to years outdoors in a few days or weeks. The types of damage include: fading, discoloration, loss of gloss, chalking, cracking, turbidity, bubbles, brittleness, strength decay and oxidation. UV test data can help you choose new materials and evaluate how changes in formulations affect the durability of new products.
Widely used in coatings, inks, paints, resins, plastics, rubber, printing and packaging, aluminum profiles, adhesives, automobile and motorcycle industries, cosmetics, metals, electronics, electroplating, medicine, etc.
Test structure
1. The test chamber structure is made of corrosion-resistant SUS304, including 8 UVA lamps, test sample rack, control system and indicator.
2. The lamp power is 40W and the lamp length is 1200mm. The uniform working area of the test chamber is 900mm*500mm.
3. The lamp tube is installed parallel to the top of the box with a center distance of 70mm.
4. The test sample is placed on the test stand, with the back of the sample exposed to the air at room temperature and not exposed to ultraviolet radiation.
5. The test box should be placed in a test room with a temperature of 15-35℃, 300mm away from the wall, and should be protected from the influence of other heat sources. The air in the laboratory should not be circulated strongly to avoid affecting the lighting conditions.
Test conditions
1. The test sample is fixed on the test frame, facing the UV lamp.
2. The service life of each lamp is about 1600 hours.
Test samples and performance evaluation
1. Appearance evaluation: Appearance evaluation is mainly performed on coatings. Appearance evaluation can also be performed on plastics and rubber when necessary. The main items to be checked are gloss, color change, spots, stability, etc. Quantitative items should be tested with instruments as much as possible, such as gloss and colorimeter.
2. Evaluation of mechanical and other properties: Generally, rubber materials are tested for tensile strength, elongation, and hardness; plastics are tested for impact strength, elongation at break, tensile strength, and flexural strength. Other performance test items may be specified if necessary.
