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· The flame retardancy of paper is mainly used for building decoration paper, cardboard, fireproof lining cardboard
· Theoretical ways to flame retardant paper: cooling, reducing free radical concentration, and cutting off oxygen sources
· Methods for flame retardancy of paper:
① Add flame retardant during pulping
② After papermaking, methods such as impregnation, sizing, pressing, and coating are used
· Specific methods:
1. In slurry addition method
Use flame retardants such as clay, antimony trioxide, insoluble oxides, etc
Advantages: Can produce water-resistant flame-retardant paper
2. Immersion method
Make 100% plant fiber paper have excellent flame retardancy, adding 10-20g of flame retardant per square meter of base paper
Advantages: Large absorption capacity, short processing time, easy operation
3. Glue pressing method
The amount of flame retardant absorbed is limited, and 100% flame retardant paper cannot be obtained.
Suitable for achieving flame retardancy only on the surface of paper
4. Coating method
Mix flame retardant and adhesive to form a coating and apply it to the surface of paper
Fire resistance of paper surface
· The properties that excellent paper flame retardants need to possess
Basic requirements: low flame propagation speed, low smoke, low toxicity
1) Good dimensional stability
2) No increase in moisture absorption
3) Has good weather resistance and durability
4) Less yellowing and less decrease in strength during heat treatment
5) No rust
· Main directions and measures for researching flame-retardant paper
1) Use composite flame retardants. It has excellent performance with multiple flame retardants.
2) Develop and research new types of flame retardants.
At present, it meets the excellent characteristics of flame retardant materials: good flame retardant performance, physical and mechanical properties, and electrical properties; Good liquidity; Low exudation; Photostability; High compatibility with fiberglass and other fillers; Recyclability; Dimensional stability; Low haze, etc.
Flame retardants that meet the above excellent performance requirements are still highly efficient bromine based flame retardants.
The other areas of development include modified halogenated flame retardants, halogen-free flame retardant materials, silicon-based flame retardants, etc.
Jinan Backfire New Materials Co., Ltd. is mainly committed to the development of environmentally friendly flame retardants, providing customers with the most economical and professional flame retardant solutions.
Reference: Wu Shula Application and Development of Flame retardants [J], Technological Progress, 2008 (5): 60-62