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Fire doors have wooden fire doors and steel fire doors.
Henan Jutai Door Industry is a professional manufacturer specializing in fire doors, including steel-wood composite fire doors, wooden fire doors, steel fire doors, and fire shutter doors. As an integrated company engaged in R&D, production, sales, and service, we provide high-quality fire protection solutions for industrial and commercial enterprises. Fire doors are generally divided into two main types: wooden fire doors and steel fire doors. While steel fire doors are widely recognized, many consumers are still confused about how wooden fire doors can be fire-resistant.
The flame-retardant quality of wood used in wooden fire doors is crucial to their performance. Many manufacturers have incorporated the flame-retardant process as an essential control point during production. However, due to outdated technical standards and short procedures, there are significant differences in flame-retardant methods across different regions, especially in Zhejiang. This inconsistency often leads to unreliable flame-retardant effects, which may reduce the fire resistance rating of the door and pose risks to life and property safety.
Common flame-retardant methods for wood include spraying, soaking, cooking, vacuum treatment, and vacuum pressing. Among these, the spraying and soaking methods are typically applied to unshaved wood with a thickness less than 10mm, making them unsuitable for producing high-performance wooden fire doors. Although vacuum and vacuum pressing methods offer superior flame-retardant results, they require expensive equipment, so not all companies use them.
At that time, many fire door manufacturers relied on the cooking method for flame-retardant treatment. Jutai Door Industry emphasizes that when using this method, it is critical to ensure that the moisture content of the wood is not too high. The moisture level directly affects the flame-retardant quality of the wood. When wood enters the flame-retardant bath, it absorbs the chemical solution, and the amount absorbed determines the effectiveness of the treatment. The more the wood absorbs the flame retardant, the better its fire resistance, resulting in a higher oxygen index and deeper flame-retardant depth.
Unfortunately, some companies believe that wet wood naturally absorbs the flame retardant liquid, so they do not dry the wood before treatment. Some even use freshly cut, wet wood, without considering the impact of moisture on the final product. This practice leads to unstable flame-retardant performance. According to testing, under identical conditions, wood with a moisture content below 15% can achieve over 5 points higher in oxygen index and more than 3mm deeper flame-retardant depth compared to wood with over 40% moisture content.
For this reason, at Jutai Door Industry, we strictly control the moisture content of the wood before flame-retardant treatment to ensure consistent and reliable fire protection performance. Our commitment to quality and safety makes us a trusted partner in the fire door industry.
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