English
EspañolBlue-Sky Safety Glass - Pursue quality and cast high-quality goods.
Home / News / Industry News / How to test the sealing of the hollow layer of Insulated glass?
Testing the sealing of the hollow layer in insulated glass (IG) units is crucial to ensure the long-term performance of the IG unit and prevent issues like condensation and gas leakage. There are several methods for testing the sealing of the hollow layer, including visual inspection, non-destructive tests, and destructive tests. Here are some common methods:
1. Visual Inspection:
- Visual inspection is the initial and non-destructive step to check for any visible signs of seal failure. Examine the edges of the IG unit to look for the following:
- Visible gaps or openings in the sealant or spacer material.
- Condensation or fogging between the glass panes, which may indicate a breach in the seal.
- Any physical damage or defects that may compromise the seal.
2. Non-Destructive Tests:
- Non-destructive tests are used to assess the integrity of the IG unit without causing damage. Common non-destructive tests include:
- Thermal Imaging: Infrared thermal imaging can identify variations in surface temperatures that may indicate seal failure or gaps in the spacer material.
- Ultrasonic Testing: Ultrasonic devices can detect changes in the acoustic signature of an IG unit, which may suggest seal defects or gas leakage.
- Gas Filling Verification: Measuring the gas fill levels within the IG unit using gas analyzers can indicate gas leakage.
3. Destructive Tests:
- Destructive tests involve opening or cutting into the IG unit to directly inspect the seal. While these tests can provide definitive results, they are typically used as a last resort or for quality control purposes. Examples include:
- Gas Fill Verification: The IG unit is punctured to collect gas samples, which are then analyzed to confirm the presence of the intended insulating gas and check for any leakage.
- Microscopy: Microscopic inspection of the seal area can reveal defects or gaps in the sealant or spacer.
- Water Immersion Test: Submerging the edge of the IG unit in water can reveal leaks or areas where the seal has failed.
4. Accelerated Age Testing:
- IG units may undergo accelerated age testing in environmental chambers, where they are subjected to extreme temperature and humidity conditions to simulate long-term exposure. Any failure of the seal becomes evident under these conditions.
5. Quality Control and Manufacturer Testing:
- Many IG unit manufacturers perform extensive testing during production to ensure seal integrity. This includes tests for sealant adhesion, gas leakage, and durability.
It's important to note that non-destructive testing is preferred when possible because it does not compromise the integrity of the IG unit. If non-destructive tests suggest a problem, more invasive or destructive tests may be necessary to confirm the issue.
Regular inspection, maintenance, and adherence to manufacturer guidelines for IG unit installation can also help prevent seal failure. If an issue is suspected or confirmed, it is advisable to consult with the manufacturer or a qualified professional to assess and address the problem to maintain the long-term performance of the insulated glass unit.
