Fire-rated Glass: FireLite™
FireLite™ is crafted from super heat-resistant glass-ceramics with an almost zero coefficient of thermal expansion, making it incredibly resistant to thermal shock. It won't crack, even when heated to 800°C and exposed to cold water. As the only fire-rated glass that withstands both intense heat during a fire and rapid cooling from firefighting efforts, FireLite™ offers unparalleled protection. Its exceptional fire resistance has been verified by meeting UL standards in the United States.
Features
FireLite™ is a heat-resistant glass-ceramic with almost zero thermal expansion, making it the only fire-rated glass capable of withstanding temperatures up to 800°C. Its exceptional resistance to thermal shock ensures it won’t break, even when immediately exposed to water.
FireLite™ offers clear visibility nearly identical to that of standard window glass. When used to demarcate a fire compartment, it allows for a bright, open interior space.
Unlike heat-resistant tempered glass, which can break unexpectedly even without external force, FireLite™ is free from this issue.
Heat-resistant tempered glass is challenging to cut and process, with a high risk of breakage. In contrast, FireLite™ is easy to cut without these concerns.
Construction Examples
Size
Maximum glass size: 1219×2438mm (thickness: 3mm)/1586×3033mm (thickness: 4mm, 5mm)/1219×3000mm (thickness: 8mm)
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This represents the maximum size for glass production.
Propeties
| Properties | FireLite™ | Float glass | ||
|---|---|---|---|---|
| Visible light transmittance | 5 mm thickness | % | 87 | 89 |
| 8 mm thickness | % | 85 | 88 | |
| Coefficient of thermal expansion | 30～750℃ | ×10-6/K | -0.3 | 8.5 |
| Specific heat | 25℃ | J/kg・K | 710 | 753 |
| Thermal conductivity | 25℃ | W/m・K | 1.6 | 1 |
| Specific gravity | Approx. 2.5 | Approx. 2.5 | ||
| Young's modulus | GPa | 88 | 72 | |
| Poisson's ratio | 0.24 | 0.23 | ||
| Mohs hardness | 7.0 | 6.5 | ||
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The above figures are not guaranteed.
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The float glass data is a typical reference value.
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The coefficient of thermal expansion of float glass is temperature range of 30 to 350°C.
Transmittance Curve
The transmittance of FireLite is nearly identical to that of float glass. The 5mm thick FireLite™ is a highly transparent glass, with a visible light transmittance of 87%.
US UL Standard Test
The UL Standard, a leading U.S. safety standard, mandates that fire doors undergo testing for safety during fire extinguishing operations. This includes not only a heating test but also a water discharge test conducted immediately after heating to ensure that no significant defects occur during firefighting efforts. Following independent testing, FireLite was confirmed to meet this rigorous UL standard.
News：Fire-Resistant Glass "FireLite™" Obtains EPD (Environmental Product Declaration)
Fire-resistant glass, "FireLite™ ※1" has obtained the "SuMPO EPD※2" environmental label from the Sustainable Management Promotion Organization (SuMPO).
The Environmental Product Declaration (EPD) is an international environmental label that quantitatively calculates the environmental impact of a product's life cycle (including CO2 emissions and other environmental burdens) and is obtained and disclosed after passing third-party verification. With this certification, buildings using "FireLite™" will be able to understand the environmental impact from raw material procurement to factory shipment, meeting the needs of those who wish to select building materials with lower environmental impact.
※1 FireLite™ JR-BW-25001E (https://ecoleaf-label.jp/epd/2210)
※2 SuMPO Environmental Label Program | Sustainable Management Promotion Organization (SuMPO) (https://ecoleaf-label.jp/)
