Raw materials: The main components are phenol and formaldehyde, based on phenolic resin, with the addition of foaming agent, curing agent and other additives.
Production process: Usually the molding process is adopted. First, various raw materials are mixed and stirred evenly in a certain proportion, and then injected into the mold. Foaming and curing reactions are carried out at a certain temperature and pressure to form phenolic insulation boards with a certain shape and size.
Excellent fire resistance: It has the characteristics of non-combustibility, low smoke, and resistance to high temperature variation. It can effectively prevent the spread of fire. It can basically reach the national fire protection standard A level, and can withstand ℃ flame spray for 10 minutes. Only the surface is slightly carbonized but not burned through.
Good thermal insulation performance: The thermal conductivity is low, generally between 0.021-0.030W/(m・k), which is much lower than the commonly used inorganic and organic exterior wall insulation products on the market. It can effectively reduce heat transfer in the tunnel and reduce energy consumption.
Lightweight and high strength: The bulk density is generally 30-80Kg/m³, which is light and easy to transport and construct. At the same time, it has certain compressive strength and bending strength, and can withstand certain pressure and external impact in the tunnel.
Good waterproof and moisture-proof performance: The phenolic insulation board has a high closed-pore rate, has certain water resistance and water vapor permeability, and can effectively prevent moisture from penetrating into the tunnel wall, avoiding wall damage and insulation performance degradation caused by moisture.
Strong chemical corrosion resistance: In addition to being corroded by strong alkali, it can resist the erosion of almost all inorganic acids, organic acids, and organic solvents, and has good stability in the complex chemical environment in the tunnel.
Good dimensional stability: Under different temperature and humidity environments, there will be no obvious shrinkage, deformation, etc., and it can maintain a good shape and size to ensure the durability of the insulation effect.
Protecting tunnel structure: It can effectively reduce the temperature stress of the tunnel lining structure, reduce concrete cracking and peeling caused by temperature changes, and extend the service life of the tunnel.
Energy saving: reducing the heat loss in the tunnel and the energy consumption required to maintain the temperature in the tunnel, especially in high-cold areas or tunnels with special temperature requirements, the energy saving effect is significant.
Improve safety: its excellent fireproof performance provides higher safety for personnel and equipment in the tunnel, reduces the hazards when a fire occurs, and its low smoke and non-toxic characteristics help to evacuate personnel and carry out rescue work.
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Convenient construction: light weight, various sizes and specifications, can be customized and cut according to the actual size of the tunnel, the installation process is relatively simple, can improve construction efficiency and shorten the construction period.
Base treatment: first clean the surface of the tunnel lining to ensure that there is no oil, dust, debris, etc., repair and polish the uneven parts to make the surface flat and smooth, so as to ensure that the insulation board and the base can fit closely.
Install the keel: according to the design requirements, install the L-shaped keel on the tunnel wall at a certain distance, fix it with expansion screws, keep the keel perpendicular to the tunnel surface, and the length and spacing of the keel are determined according to the design.
Laying insulation board: Install phenolic insulation board on the keel, which can be fixed by gluing or anchoring to ensure that the insulation boards are tightly spliced without obvious gaps.
Sealing treatment: Seal the splicing seams of the insulation board and the connection with the keel. You can use sealant or other sealing materials to prevent air and moisture from entering the insulation layer.
External finishing layer construction: After the insulation board is installed, the external finishing layer is constructed according to the design requirements, such as applying fire-resistant reinforced fiberboard, anti-cracking mortar, etc., to improve the overall performance and aesthetics of the insulation system.
Length: generally mm, mm, mm, etc.
Width: Common ones are 600mm, 900mm, mm, etc.
Thickness: usually between 20mm and 100mm, such as 20mm, 30mm, 50mm, 80mm, 100mm, etc. The specific thickness can be selected according to the insulation requirements and design of the tunnel.
Customizable: Some manufacturers can customize phenolic insulation boards of different sizes and shapes according to the specific needs of tunnel projects, such as curved boards, special-shaped boards, etc., to meet the insulation needs of special parts of the tunnel.
The density is generally between 40 and 80Kg/m³. Phenolic insulation boards of different densities will have different properties such as compressive strength and thermal conductivity. They can be selected according to the actual use environment and requirements of the tunnel.
Contact us to discuss your requirements of tunnel phenolic foam board. Our experienced sales team can help you identify the options that best suit your needs.