Fire safety is a critical concern in the construction industry, driving demand for high-performance fireproof materials that can resist high temperatures, slow flame spread, and reduce heat transfer. Fire-resistant mica flakes, with their exceptional thermal stability (withstanding temperatures up to 1200°C), low thermal conductivity, and non-combustible properties, have emerged as a key additive in building fireproof materials. Unlike synthetic flame retardants that may release toxic gases when burned, mica flakes are natural, non-toxic, and maintain their structural integrity even in extreme heat, making them ideal for fire doors, fire curtains, and wall insulation panels.

In fire door manufacturing, mica flakes are mixed with wood fiber or mineral fiber to create fire-resistant core materials. When 20%-30% of fire-resistant mica flakes (particle size 40-80 μm) are added to the core material, the fire door’s fire resistance rating can be upgraded from 30 minutes to 90-120 minutes. This is because mica flakes form a dense, heat-insulating layer when exposed to fire, blocking the transfer of heat and preventing the door from charring or collapsing. A construction materials manufacturer in the UK tested our mica-reinforced fire doors under standard fire conditions (ISO 834): the doors maintained their structural stability for 110 minutes, with the backside temperature remaining below 140°C (the threshold for fire spread), exceeding the requirements for Class B fire doors.

Moreover, fire doors with mica flakes have demonstrated excellent performance in real-world fire scenarios. In a multi-story residential building fire in Australia, fire doors containing mica flakes delayed the spread of fire and smoke, allowing more time for residents to evacuate safely. After the fire, it was found that these doors retained a significant portion of their structural integrity, which helped limit the overall damage to the building.

Additionally, mica flakes improve the mechanical strength of fire door cores, reducing warping and cracking during installation and use. The interlocking structure formed by mica flakes within the core material acts like a reinforcement network, providing additional support and stability. This not only enhances the fire resistance but also extends the service life of fire doors.

For fire curtains—flexible barriers used to seal off fire-prone areas in commercial buildings—mica flakes are coated onto high-temperature-resistant fabrics such as glass fiber or aramid fiber. The mica coating (containing 50%-60% mica flakes) acts as a thermal shield, reflecting up to 85% of radiant heat and preventing the fabric from melting. A shopping mall in Spain installed fire curtains treated with our fire-resistant mica flakes: during a simulated fire test, the curtains stopped the spread of flames for 80 minutes, providing sufficient time for evacuation and fire suppression.

Furthermore, research has shown that the orientation of mica flakes in the coating can significantly impact the performance of fire curtains. When mica flakes are properly aligned during the coating process, they can form a more effective barrier against heat and flames. Our R&D team has developed a unique coating process that ensures optimal flake orientation, maximizing the fire-resistant properties of the curtains.

Unlike traditional fire curtain coatings that degrade after repeated use, mica-based coatings have excellent durability, maintaining their fire-resistant properties for up to 10 years with minimal maintenance. This long lifespan makes mica-coated fire curtains a cost-effective solution for commercial buildings, reducing the need for frequent replacements and associated maintenance costs.

In wall insulation panels, mica flakes are incorporated into gypsum or cement-based insulation materials to enhance thermal insulation and fire resistance. Adding 15%-25% of mica flakes to gypsum insulation panels reduces the thermal conductivity from 0.17 W/(m·K) to 0.12 W/(m·K), improving energy efficiency by 25%-30%. At the same time, the panels’ fire resistance is significantly enhanced—they do not ignite or release toxic smoke when exposed to open flames, meeting the strict fire safety standards of the European Union (EN 13501-1) and the United States (ASTM E84).

In addition to improving fire resistance and thermal insulation, mica flakes also contribute to the acoustic performance of wall insulation panels. The flaky structure of mica helps to absorb and dampen sound waves, reducing noise transmission between rooms. This makes mica-reinforced insulation panels an ideal choice for buildings where soundproofing is also a priority, such as hotels, schools, and hospitals.

A residential building project in Germany used these mica-reinforced insulation panels: the buildings achieved a BREEAM Excellent rating for energy efficiency, and fire safety tests confirmed the panels contributed to a 40% reduction in fire spread risk compared to standard insulation. The success of this project has led to increased interest in mica-reinforced insulation panels across Europe, with more developers and contractors specifying them for their projects.

Our fire-resistant mica flakes are available in two grades: high-temperature-resistant muscovite mica flakes (stable up to 750°C) and ultra-high-temperature phlogopite mica flakes (stable up to 1200°C). Key technical indicators include: moisture content ≤0.3%, ash content ≤0.5%, thermal conductivity ≤0.08 W/(m·K), and flame retardancy rating (UL94) V-0. All products undergo rigorous testing, including thermal stability testing (in a muffle furnace), flame spread testing (using a cone calorimeter), and toxic gas emission testing (in accordance with ISO 19702), ensuring compliance with global fire safety regulations.

To ensure the quality and consistency of our mica flakes, we have implemented a strict quality control system at every stage of production. From raw material sourcing to the final packaging, each batch of mica flakes is carefully inspected and tested.

We provide tailored support for building materials manufacturers. For fire door producers, we recommend using phlogopite mica flakes for high-temperature applications and assist in optimizing the mixing ratio to balance fire resistance and cost. For fire curtain fabric coaters, we offer micronized mica flakes (particle size 10-20 μm) that form a smooth, uniform coating without affecting fabric flexibility. Our technical team also conducts on-site training on mica flake dispersion techniques, ensuring even distribution in materials to avoid weak spots in fire resistance.

In addition to technical support, we also offer customized product development services. If customers have specific requirements for mica flake properties, such as particle size distribution, surface treatment, or color, our R&D team can work closely with them to develop a tailor-made solution. This flexibility allows us to meet the diverse needs of our customers in the building materials industry.

In logistics, we use heat-sealed, moisture-proof packaging (25 kg/bag) to prevent mica flakes from absorbing moisture, which could reduce their fire-resistant performance. We partner with shipping companies specializing in construction materials, delivering products to Europe, North America, and the Middle East within 20-35 days.