The Material of PVC Windows
PVC windows are neither pure plastic nor pure steel, but rather a composite structure like a sandwich:
Outer Layer: High-strength PVC plastic, resistant to aging and available in a variety of colors
Core: Enclosed galvanized steel frame, providing structural strength
Joint Method: The steel is completely encased in plastic, preventing direct contact with air
This design retains the corrosion resistance of plastic while possessing load-bearing capacity close to that of steel, like putting a plastic protective suit on a steel frame.
Why is a steel-plastic composite window needed?
Strength requirements: Pure PVC will bend significantly over spans exceeding 2 meters, while adding steel allows for a 4-meter span without deformation.
Temperature adaptability: Steel offsets the thermal expansion and contraction of plastic, maintaining a tight seal from -30℃ to 70℃.
Cost balance: Saves 40% on costs compared to pure aluminum windows, and is 60% lighter than pure steel windows.
Comparison with other doors and windows
vs Aluminum alloy windows: PVC has twice the insulation but is slightly weaker.
vs Solid wood windows: Maintenance-free and moisture-proof, but lacks the natural texture of wood.
vs Pure steel windows: Solves the problem of condensation and rust in steel windows.
vs Pure plastic windows: Improves wind pressure resistance by 3 levels.