Beijing sealant compatibility test box

Structural sealant compatibilitySexual testing chamberUVA2004Used for silicone structural sealant in constructionRongSexual testing. Structural sealant compatibility test boxUVA2004It is one of the main testing instruments for the compatibility test of sealant in GB16776-2005 "Silicone Structural Sealants for Buildings".This test chamberThe accelerated aging tester can simulate the effects of outdoor aging in the laboratory. It is used to predict the durability of materials exposed to sunlight in outdoor environments. The ultraviolet fluorescent tube adopts UVA-340 ultraviolet fluorescent lamp is used to simulate the damage caused by exposure, and the exposure temperature has an automatic control function. Within a few days or weeks,This test chamberIt can reproduce the fading that occurred outdoors for several months or years. This includes color changes, loss of luster, powdering, cracking, brittleness, and decreased strength.This experimental equipment adopts automatic operation mode,It can automatically control the temperature and implement temperature compensation, and automatically record the UV light exposure time to shut down at a scheduled time.The structure is simple, easy to use, accurate and reliable, with a high cost performance ratio. The sealant compatibility test box is suitable for use by local quality supervision and testing departments, curtain wall manufacturers, and structural adhesive manufacturers at all levels.

Tianjin Beijing Shanghai Liaoning WuxiBeijing sealant compatibility test boxUVA2004Execution and compliance with standards

GB16776-2005 "Silicone Structural Sealants for Buildings";

GB/T5823 "Terminology for Building Doors and Windows";

GB/T 14682 "Terminology for Building Sealing Materials";

JC/T 485-1992 (1997) "Elastic sealants for building windows";

GB/T14683-2003 Silicone building sealant.

Tianjin Beijing Shanghai Liaoning WuxiBeijing sealant compatibility test boxUVA2004technical parameters
1. Ultraviolet radiationfluorescent lamp：UVA-340*4 pieces
2. Temperature control accuracy: (40.0 ℃~50.0 ℃) ±1
3. Temperature measurement range:0~65℃
4. Radiation time setting value: 0~9999 days, 23 hours, 54 minutes
5. Heater power: 600W
6. Dimensions of the test chamber: 1290 * 360 * 690mm
7. Power supply: 220VAC ± 10% 2KVA

Structural sealant compatibility test boxUVA2004Characteristics of

1. Adopt automatic modeSettingsOperation mode, can automatically adjust and control temperature；
2. Automatically record the UV light exposure time and shut down at a scheduled time; Power off memory, accumulate timing after power on;
3. After the box is opened, it automatically cuts off the ultraviolet light to avoid the harm of ultraviolet light leakage to the human body;
4. Simple structure, easy to use, accurate and reliable, high cost-effectiveness.

Tianjin Beijing Shanghai Liaoning WuxiUVA2004The working principle of
The UVA2004 sealant compatibility test chamber uses UVA-340 ultraviolet fluorescent lamps. Ultraviolet fluorescent lamp is a low-pressure mercury vapor discharge lamp with fluorescent powder coated on the inner wall of the lamp tube. When current flows through the lamp tube, mercury vaporizes and discharges, emitting a large amount of ultraviolet light. The shorter wavelength ultraviolet light is converted into longer wavelength ultraviolet light and visible light by the fluorescent powder. Due to the characteristics of this lamp, the spectral energy distribution of the fluorescent top can be adjusted and controlled by changing the composition of the fluorescent powder, making it more similar to the spectral lines of sunlight.
The shortwave radiation of UVA-340 can simulate the critical shortwave wavelength range of sunlight spectrum, which is the spectrum with a wavelength range of 295 to 360mm. The short wave spectral distribution of UVA-340 is very similar to sunlight passing through glass windows. We refer to the spectral band between 315 nanometers and 400 nanometers as the UVA band or UV-A band. The lamp with its peak emission in the UVA range is called a UVA lamp and is widely used in artificial climate aging tests.

Although ultraviolet light (UVA) only accounts for 5% of sunlight, it is the main lighting factor causing a decrease in the durability of outdoor products. This is because the influence of photochemical reactions of sunlight increases with decreasing wavelength, so when simulating the destructive effects of sunlight on the physical properties of materials, it is not necessary to reproduce the entire spectrum of sunlight. In most cases, only short wavelength ultraviolet (UV) light needs to be simulated. The use of ultraviolet fluorescent lamps as aging light sources has the following advantages: it can quickly obtain experimental results and control the aging illumination (only the peak point needs to be controlled). It can obtain very stable spectra, is easy to maintain and has low maintenance costs, has cheap machine intervals, and low operating costs.