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Flame Retardant Application of Diammonium Phosphate in Construction Lumber

Application Methods

1. Coating

Application Method: Diammonium phosphate can be evenly coated onto the surface of the wood by spraying, brushing, or rolling.

Effect: The coating forms a protective film, effectively reducing the flammability of the wood surface and improving the fire resistance of the wood. Coating thickness and uniformity are key to ensuring complete and lasting coverage.

2. Impregnant

Application Method: Soak the wood in an aqueous solution of diammonium phosphate, allowing the solution to penetrate into the wood. Soaking time and solution concentration need to be adjusted according to the type and size of the wood.

Effect: Impregnation not only protects the surface of the wood, but also allows diammonium phosphate to penetrate into the wood, providing more comprehensive protection. The treated wood is more difficult to burn under high temperature or open flame, extending the escape time for people in a fire.

3. Additive

Application Method: During wood production, diammonium phosphate is added as an additive to wood composite materials, such as plywood and fiberboard.

Effect: This gives the wood fire-retardant properties during production, and the finished wood can be used directly in construction without post-processing.

Potential Impact on Human Body

1. Toxicity

Description: Diammonium phosphate has a certain toxicity and may irritate the skin, eyes, and respiratory system. Long-term contact may cause allergic skin reactions.

Preventive Measures: Wear personal protective equipment such as gloves, goggles, and masks when using to avoid skin contact and inhalation of dust or vapor. Set up a good ventilation system in the operating area.

2. VOC Emissions

Description: Some diammonium phosphate products may produce volatile organic compounds (VOCs), which may affect air quality, especially when used in enclosed environments.

Preventive Measures: Maintain good ventilation during use, use low-VOC or no-VOC formulations to reduce the impact on indoor air quality.

3. Workplace Safety

Description: When handling and applying diammonium phosphate, attention should be paid to workplace safety to avoid fire sources and high temperatures.

Preventive Measures: Strictly follow safe operating procedures to ensure a clean and fire-free workplace. Regularly train employees to ensure they are familiar with safe operating procedures and emergency response measures.

Benefits

Fire Retardant Performance

Description: Diammonium phosphate can significantly reduce the burning performance of wood.

Effect: By forming a char layer and releasing flame retardant gases, it inhibits flame spread, extends the escape time for people in a fire, and reduces fire damage to buildings and personnel.

Enhanced Safety

Description: The application of diammonium phosphate improves the fire safety of construction lumber.

Effect: Improves the overall fire safety of buildings, especially suitable for high-rise buildings, public facilities, and buildings requiring high fire protection.

Durability

Description: Diammonium phosphate improves the durability of wood and resists the growth of mold and fungi.

Effect: Extends the service life of wood, reduces maintenance and replacement costs, and is suitable for wood applications in humid environments.

Compliance with Building Codes

Description: The application of diammonium phosphate complies with building codes and fire safety requirements.

Effect: Meets the code requirements of construction projects, complies with relevant safety standards, and makes it easier for construction projects to pass fire safety audits.

Environmental Protection

Description: Diammonium phosphate is a relatively environmentally friendly flame retardant that does not contain bromine or chlorine compounds, reducing the negative impact on the environment.

Effect: During production and use, it has less harm to the environment and human body, helping to achieve green building and environmental protection goals.

Multifunctionality

Description: In addition to its flame retardant function, diammonium phosphate also has the function of increasing wood stability and moisture resistance.

Effect: Reduces the problem of wood swelling and deformation due to moisture, enhances the structural stability of wood, and has certain antibacterial and antifungal properties.