TEELONG TL-UV UV weathering test chamber (intelligent type)

Equipment structure

The structure of the UV weathering box is a stainless steel inner box with two rows of four lamps installed to simulate ultraviolet light. The humidification system is used to increase the temperature of the inner box to simulate a humid environment, and the spray system is used to simulate rain. The three different environments are set to cycle alternately through the program.

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 that occurs outdoors for months to years 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 conditions

1. The test sample is fixed on the test rack, facing the fluorescent light. When the sample rack is not filled with the sample, it is necessary to fill the sample rack with a blackboard to keep the inner wall of the test chamber closed.

2. Test temperature. Three temperatures can be used during illumination: 50, 60, and 70°C, with 60°C being the preferred temperature. The temperature during the condensation stage is 50°C, with a temperature tolerance uniformity of ±2.

4. The cycle of illumination and condensation can be selected as 4 hours illumination, 4 hours condensation or 8 hours illumination, 4 hours condensation.

After the first illumination of 400-450 hours, one fluorescent lamp in each row of lamps needs to be replaced, and the other lamps are cycled and replaced to compensate for the loss caused by lamp aging. This operation mode ensures that the service life of each lamp is about 1600 hours.

5. When replacing the lamp, wipe the water tray dry and clean it to avoid scale formation.

Test samples and performance evaluation

1. Appearance evaluation: The main evaluation for coatings is appearance. Plastics and rubber can also be evaluated when necessary. The main items to be checked are gloss, color change, powdering, spots, blistering, cracks, and dimensional stability. Quantitative items should be tested with instruments, such as gloss and colorimeter.

2. Evaluation of mechanical and other properties: For general rubber materials, tensile strength, elongation, and hardness are measured; for plastics, impact strength, elongation at break, tensile strength, and bending strength are measured. Other performance test items can be specified if necessary
 

Technical specifications