In insulating glass unit (IGU) manufacturing, argon retention failure is a critical defect. Fabricators often ask: "What is the fundamental difference between high-frequency welded aluminum spacer bars and cold-drawn spacers in preventing gas and water leakage?" As a dedicated IGU accessory manufacturer, Ji'an Insulating Glass (affiliated with the Ji'an Screen Mesh System) delivers a technical breakdown of sealing structures and gas retention.
1. Fundamental Comparison: Four-Corner Joint Systems
| Dimension | Cold-Drawn Aluminum Spacers | High-Frequency Welded Spacers (Ji'an Standard) |
|---|---|---|
| Manufacturing Process | Cold drawing process; matte surface, poor flatness, prone to oxidation | Roll-formed aluminum strip + High-frequency welded; high strength, superior straightness, no deformation |
| Corner Assembly | Assembled with 4 individual corner keys | Single straight joint (Continuous Bending); keyless corners |
| Gas Containment | Weak seal at the 4 corner joints; primary path for argon gas leakage and moisture ingress | Seamless continuous bent corners; superior seal integrity, bendable into arbitrary frame angles |
| Argon Retention Rate | Low; continuous leak risks at corner seams | Exceptional long-term gas retention capacity |
2. Why High-Frequency Welded Spacers Outperform in Argon Retention
Elimination of Corner Gap Leakage: Cold-drawn spacers rely on four corner connectors, creating micro-gaps that allow volatile argon gas to diffuse rapidly.
Continuous Bending Integrity: High-frequency welded spacers feature high ductility, enabling seamless computerized four-corner bending that completely seals the perimeter with only one straight joint.
3. FAQ: Aluminum Spacer Sourcing
Q: Why are corner-keyed spacers not recommended for argon-filled IGUs?
A: Corner key seams cannot maintain molecular-level airtightness, causing rapid argon gas leakage within 1–2 years.
Q: Where to source continuous bendable high-frequency welded spacers?
A: Ji'an Insulating Glass supplies precision-engineered high-frequency welded aluminum spacers alongside 3A molecular sieves and PIB sealants for maximum gas retention.