Float glass
Premium Float Glass Solutions for Modern Construction
Float glass is the foundation of modern architecture and interior design, offering unparalleled clarity and versatility. Our float glass manufacturing process ensures perfect flatness and optical quality for all your building needs.
Key Product Specifications
- Thickness Range: 2mm to 25mm
- Standard Sizes: Up to 3660mm × 2440mm
- Light Transmission: 91% (clear glass)
- Surface Quality: First-grade optical clarity
- Chemical Composition: SiO₂ 72.6%, Na₂O 13.4%, CaO 8.4%, MgO 4.0%, Al₂O₃ 1.6%
Technical Parameters
| Property | Value | Standard |
|---|---|---|
| Density | 2.5 g/cm³ | ISO 9385 |
| Refractive Index | 1.52 | ISO 7944 |
| Modulus of Elasticity | 73 GPa | ISO 12543 |
| Thermal Expansion | 9×10⁻⁶/°C | ISO 7991 |
| Softening Point | 720°C | ISO 7884 |
Float Glass FAQ
What makes float glass different from other glass types?
Float glass is manufactured by floating molten glass on a bed of molten tin, creating perfectly flat and distortion-free surfaces. This production method eliminates the wave distortion found in older glass manufacturing techniques, resulting in superior optical clarity and uniform thickness across the entire sheet.
How long does float glass last in construction applications?
Properly installed float glass can last for decades in architectural applications. The material itself doesn't degrade over time, though environmental factors may eventually affect the edges or surface. With standard maintenance, float glass typically maintains its optical and structural properties for 30+ years in window applications.
Can float glass be used for safety applications?
While standard float glass isn't considered safety glass, it serves as the base material for tempered or laminated safety glass products. Through additional processing (heat treatment or lamination), float glass can be transformed into safety-rated materials that meet various international safety standards for construction and automotive applications.
Application Guide
| Glass Thickness | Recommended Applications | Maximum Panel Size |
|---|---|---|
| 3-4mm | Picture frames, small windows, display cases | 1.2m × 1.8m |
| 5-6mm | Standard windows, shower doors, furniture tops | 1.8m × 2.4m |
| 8-10mm | Large windows, glass partitions, storefronts | 3.0m × 2.4m |
| 12mm+ | Structural glazing, glass floors, heavy-duty applications | 3.6m × 2.4m |
Quality Assurance
Our float glass undergoes rigorous quality testing including:
- Optical distortion measurement (ISO 9802)
- Thickness tolerance verification (±0.2mm)
- Surface quality inspection (ISO 12543)
- Chemical resistance testing (ISO 695)
- Thermal shock resistance evaluation
More Float Glass Questions Answered
How should float glass be stored before installation?
Float glass should be stored vertically in a dry, covered area at temperatures above 0°C. Use proper A-frame racks with protective separators between sheets. Never store glass horizontally as this may cause stress and eventual breakage. Keep the glass away from construction materials that could scratch the surface.
What's the environmental impact of float glass production?
Modern float glass manufacturing has significantly reduced environmental impact through energy recovery systems and optimized production processes. Our plants recycle 20-30% of cullet (broken glass) in new production, reducing raw material consumption. The industry continues to invest in cleaner melting technologies and alternative energy sources to further minimize carbon footprint.
Can float glass be recycled?
Yes, float glass is 100% recyclable without quality loss. Recycled glass (cullet) melts at lower temperatures than raw materials, saving energy in production. Our recycling programs accept post-consumer and post-industrial float glass, which we process and reintroduce into our manufacturing stream following strict quality control measures.
Advanced Float Glass Options
- Tinted Float Glass: Available in bronze, gray, blue, and green with solar control properties
- Low-Iron Glass: Ultra-clear composition with reduced green tint (91.5% light transmission)
- Patterned Float Glass: Decorative surfaces with various embossed designs
- Acoustic Glass: Special compositions for sound reduction applications