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How To Judge The Quality Of Aluminum Spacer
Release time:
2026-05-21
To judge glass spacer quality, focus on material, dimensions, seal, desiccant, surface, and performance. Below is a clear, step-by-step guide.
1. Material & Type (Core)
- Aluminum: Stiff, durable; check for uniform thickness, no burrs/cracks. Avoid thin/soft versions.
- Warm-edge (Composite/Stainless Steel/FOAM): Lower heat transfer, anti-condensation. Look for brand consistency (e.g., TGI, Swisspacer).
- EVA/Cork (Temporary): No oil residue, no glass scratches. Cork = better heat resistance; Black EVA > White EVA in stability.
2. Dimensional Accuracy
- Straightness: ≤0.5mm/m; no bending/waviness.
- Size Tolerance: Height/width ±0.1mm, wall thickness ±0.05mm.
- Corners: Aluminum: continuous bend (no inserts) for tight seals.
3. Seal Quality (Most Critical for IGUs)
- Primary Seal (PIB/Butyl): Continuous, uniform, ≥3mm width; no gaps, bubbles, or thin spots (<5mm).
- Secondary Seal (Silicone/Polysulfide): Full, smooth, ≥5–7mm depth; no shrinkage or peeling.
- Bonding: Spacer adheres tightly to glass; no separation at edges.
4. Desiccant (Moisture Control)
- Filling: 100% filled with 3A molecular sieve; no gaps or clumps.
- Activity: Fresh desiccant absorbs moisture (prevents fogging); check expiration date.
5. Surface Condition
- No Defects: No cracks, dents, scratches (>5mm), or discoloration.
- Cleanliness: No oil, dust, or release agents (causes glass contamination).
- Coating: Uniform, no peeling (for painted/aluminum types).
6. Performance Testing (Lab/Field)
- Compression Resistance: No permanent deformation under load.
- Thermal Conductivity: Warm-edge < aluminum (lower = better insulation).
- Gas Tightness: Argon leakage ≤1%/year.
- Water Vapor Transmission: ≤0.05g/m²/day.
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