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Performance Parameters ---CLEAR FLOAT GLASS | |||||||||
Thickness (mm) | Tolerance (mm) | Weight | Visible Light(%) | Solar Radiant Heat(%) | |||||
kg/t2 | kg/m2 | Transmission | Reflectivity | Direct Pernetrate | Reflectivity | Absorb | Total Penetrate | ||
2 | 1.8-2.2 | 0.46 | 4.89 | 91 | 8 | 87 | 8 | 5 | 88 |
3 | 2.8-3.2 | 0.68 | 7.34 | 90 | 8 | 85 | 8 | 7 | 87 |
4 | 3.8-4.2 | 0.91 | 9.79 | 90 | 8 | 83 | 8 | 9 | 85 |
5 | 4.8-5.2 | 1.14 | 12.32 | 89 | 8 | 81 | 7 | 12 | 84 |
6 | 5.8-6.2 | 1.36 | 14.69 | 89 | 8 | 80 | 7 | 13 | 83 |
8 | 7.7-8.3 | 1.86 | 19.57 | 88 | 8 | 76 | 7 | 17 | 81 |
10 | 9.7-10.3 | 2.27 | 24.47 | 87 | 8 | 73 | 7 | 20 | 79 |
12 | 11.6-12.4 | 2.73 | 29.33 | 86 | 8 | 71 | 7 | 22 | 77 |
15 | 14.5-15.5 | 3.41 | 36.70 | 85 | 8 | 66 | 7 | 27 | 73 |
19 | 18.5-19.5 | 4.32 | 46.48 | 84 | 8 | 62 | 7 | 31 | 70 |
Clear Float Glass Technical Specification Sheet | |||
1. Basic Physical Properties | |||
Parameter | Standard Value | Tolerance Range | Test Method |
Density | 2.5 g/cm³ | ±0.02 g/cm³ | ISO 9385 |
Hardness (Mohs) | 6.5 | - | DIN 52305 |
Softening Point | 720°C | ±10°C | ASTM C338 |
2. Optical Characteristics | |||
Parameter | 4mm Sample | 6mm Sample | Test Standard |
Light Transmittance | ≥89% | ≥88% | EN 410 |
Solar Direct Trans. | 87% | 86% | ISO 9050 |
Refractive Index | 1.52 | ±0.01 | DIN 52323 |
Iron Oxide Content | ≤0.08% | - | XRF Analysis |
3. Mechanical Performance | |||
Parameter | Value | Test Condition | Standard |
Flexural Strength | 45 MPa | 20°C, 50% RH | EN 1288-1 |
Young's Modulus | 73 GPa | - | ISO 9854 |
Impact Resistance | 1.5 J (4mm thickness) | 1m free fall | ANSI Z97.1 |
4. Thermal Properties | |||
Parameter | Value | Note | |
Thermal Conductivity | 0.93 W/(m·K) | 20°C | |
Specific Heat Capacity | 0.84 J/(g·K) | 20-100°C range | |
Max Working Temperature | 260°C | Continuous use | |
5. Standard Size & Thickness | |||
Thickness (mm) | Size Range (mm) | Thickness Tolerance | |
2-12 | 1000×1200 to 3300×6000 | ±0.2mm (≤6mm) | |
±0.3mm (>6mm) | |||
6. Surface Quality (EN 572-2) | |||
Wave distortion: ≤0.05mm/m | |||
Bubble class: ≤Class A (≤0.3mm²/kg) | |||
Scratch level: Optical grade (≤0.01mm depth) |