E NF Preparation process of flame-retardant fiberboard

By using melamine-modified urea-formaldehyde resin and mixed flame retardants in fiberboard, combined with UV-cured coating treatment, the contradiction between the environmental protection level and flame retardant performance of fiberboard is resolved, achieving a balance between high environmental protection level and high flame retardant performance, and improving the physical properties and stability of the board.

CN122560201APending Publication Date: 2026-08-14DARE WOOD BASED PANEL GRP
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Patent Information

Application Number
CN202610626539.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-08
Publication Date
2026-08-14

AI Technical Summary

Technical Problem

Existing fiberboards have shortcomings in terms of environmental protection and flame retardant performance. Traditional adhesives and flame retardants pose health risks and compatibility issues, leading to a decline in mechanical properties. Furthermore, the uneven distribution of powdered flame retardants affects the stability and safety of the boards.

Method used

Melamine-modified urea-formaldehyde resin is used as the adhesive, and a mixed flame retardant is premixed into the adhesive. Combined with UV curing coating treatment, a uniform sealing layer is formed, which solves the synergistic problem between the adhesive and the flame retardant, and achieves high environmental protection level and high flame retardant performance of the fiberboard.

Benefits of technology

It achieves dual compliance with ENF-level formaldehyde emission and B1-level flame retardant rating for fiberboard, improving the internal bond strength, water resistance, and dimensional stability of the board, and avoiding physical property instability and formaldehyde release problems caused by uneven distribution of flame retardants.

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Abstract

This invention belongs to the field of engineered wood products technology, and relates to an E NF The preparation process of flame-retardant fiberboard includes: pre-dispersing a specific compounded powdered flame retardant in a modified urea-formaldehyde resin solution with a high melamine ratio during adhesive application, and then applying it to the fiber surface to achieve uniform coating of the flame retardant by the adhesive solution; and applying two UV-cured coatings to the surface of the hot-pressed board to form a sealed layer. The resulting fiberboard exhibits a stable formaldehyde emission level reaching E... NF The product achieves a flame retardant rating of B1 as specified in GB 8624-2012, while also possessing excellent internal bond strength, static bending strength, and low water absorption thickness swelling rate, resulting in consistent and stable product quality. This invention solves the challenge of simultaneously achieving environmental friendliness, flame retardancy, and mechanical properties in fiberboard through the synergistic application of three technologies. The use of UV-cured coating as a formaldehyde-sealing method is efficient and environmentally friendly, and the coating itself also enhances the surface wear resistance and scratch resistance of the board, increasing the product's added value.
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