To make plastics flame retardant, it is usually necessary to add flame retardants. Flame retardants are additives that can reduce the combustion performance of plastics. They change the combustion process of plastics, slow down the spread of flames, and reduce the amount of heat released, thereby achieving a flame retardant effect. The following will introduce some common methods to make plastics flame retardant.
Adding inorganic flame retardants: Inorganic flame retardants refer to flame retardants composed of inorganic substances such as metals, metal oxides, and metal salts. Common inorganic flame retardants include aluminum hydroxide, magnesium oxide, zinc oxide, etc. These inorganic flame retardants can decompose at high temperatures to release water vapor or oxides, absorb heat, form a protective layer, and prevent the spread of oxygen and heat, thereby achieving a flame retardant effect.
Adding organic flame retardants: Organic flame retardants refer to flame retardants composed of organic compounds containing elements such as nitrogen, phosphorus, and bromine. Common organic flame retardants include ammonium polyphosphate, brominated flame retardants, etc. These organic flame retardants can decompose at high temperatures to release nitrogen, phosphorus oxides or bromides, form a carbon layer, and prevent the spread of oxygen and heat, thereby achieving a flame retardant effect.
Surface treatment: By performing special treatment on the plastic surface, a flame retardant film is formed to prevent the spread of oxygen and heat, thereby achieving a flame retardant effect. Common surface treatment methods include spraying flame retardants, vacuum coating, etc.
Structural design: By changing the molecular structure of the plastic, it has its own flame retardant properties. For example, by introducing functional groups containing nitrogen, phosphorus and other elements, the arrangement of the molecular chain is changed to improve the flame retardant properties of the plastic.
In practical applications, appropriate flame retardant methods and flame retardants are usually selected according to the specific use and requirements of the plastic to ensure that the plastic products have good flame retardant properties. At the same time, factors such as the environmental performance and toxicity of the flame retardant need to be considered to ensure the safety and environmental protection of the plastic products.
In general, flame retardants are usually added to make the plastic have flame retardant properties, and the combustion properties of the plastic are changed by inorganic flame retardants, organic flame retardants, surface treatment, structural design and other methods to achieve a flame retardant effect. When selecting flame retardant methods and flame retardants, factors such as the use, environmental performance, and safety of the plastic need to be comprehensively considered to ensure that the plastic products have good flame retardant properties.
Post time: Sep-13-2024
