Phenolic foam is considered one of the most promising insulation materials in the global construction industry. It is non-combustible, does not melt or release toxic fumes when exposed to fire, and offers a range of benefits such as being lightweight, non-toxic, non-corrosive, heat-insulating, energy-efficient, sound-absorbing, and cost-effective. This material is a closed-cell rigid foam made from phenolic resin combined with flame retardants, smoke suppressants, foaming agents, and curing agents. Known as the "King of Insulation Materials," it is a next-generation thermal insulation and fireproofing solution that is both safe and environmentally friendly.
Phenolic foam has excellent fire resistance properties, with some versions achieving a B1 flame retardant rating. When inorganic fillers are added, high-density phenolic foam can reach an oxygen index of 60–70 and even achieve a Class A combustion rating. This makes it ideal for use in building insulation systems where fire safety is critical. The material can operate effectively within a wide temperature range, from -250°C to +150°C, making it suitable for a variety of applications.
Unlike traditional insulation materials, phenolic foam does not emit harmful gases or cause environmental pollution during production. It also eliminates the need for freon-based foaming agents, which is a significant advantage in terms of sustainability. Its good processability and ease of installation make it a practical choice for modern construction projects.
Phenolic foam is widely used in central air conditioning systems, particularly in high-rise buildings such as hotels, residential complexes, and hospitals. In Hong Kong, many advanced building HVAC systems have already transitioned to using phenolic foam due to its superior performance. According to rough estimates, the annual demand for ventilation pipe sheets in China exceeds 50 million square meters, indicating a large and growing market. However, the current market share of phenolic foam sandwich panels remains below 5%, highlighting the potential for further growth.
Despite its advantages, the adoption of phenolic foam faces challenges related to product technology maturity, design department recognition, installation techniques, standardization, consumer habits, and pricing. These factors can slow down market penetration. To fully realize its potential, manufacturers must continue improving production technologies, while industry stakeholders should work on developing national standards and promoting proper installation practices.
Currently, there are over a dozen phenolic foam manufacturers in China, including companies like Xiamen Gaote High-Tech Materials, which has been producing phenolic products for years. Experts suggest that accelerating the development of specialized foaming equipment, increasing production efficiency, and reducing costs will be key to expanding the market. At the same time, government agencies should establish industry management frameworks to ensure fair competition and promote long-term development.
With its unique combination of performance, safety, and eco-friendliness, phenolic foam is well-positioned to become the leading insulation material for central air conditioning ducts in the future.
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Lemon Building Material Co., Ltd. , https://www.lemonbuilding.com