How to Select Nylon Flame Retardants Under New Flame Retardancy Regulations?

This is the starting point for selection, and also the red line.Rules vary completely across different markets and fields.。

If your product is primarily targeted atEU market , or forHigh-end electronics and electrical appliances, new energy vehicles, etc.field, then This is a fundamental premise. Traditional brominated flame retardants (such as decabromodiphenyl ether) have largely been phased out in these areas due to the potential for toxic smoke during combustion. You need to focus on halogen-free systems like phosphorus-based, nitrogen-based, and inorganic hydroxides.

If the product is targeted at some... Industrial sectors or specific markets where halogen-free is not currently mandatory. , and are extremely cost-sensitive, then some ofNew and environmentally friendly halogenated flame retardants (e.g., brominated polystyrene)It may still be within the optional range, but its long-term compliance risks must be comprehensively assessed.

Once the compliance direction is determined, the next step is weighing the trade-offs. There is no "perfect" flame retardant, and each one will have an impact on the original properties of nylon, so the key is to find the one that best matches your core needs.

In halogen-free systems Red phosphorus is known for its high flame retardancy efficiency. Usually, only 5%-10% addition is needed to achieve UL94 V-0 rating for PA6 or PA66. This means it can maximize the retention of the toughness, strength, and wear resistance of the nylon matrix. Therefore, red phosphorus is often the first choice in demanding applications such as power tool housings, gears, and moving parts where mechanical strength and impact resistance are critical.

Points to note:It will make the product appear red or dark, so products with specific color requirements should be carefully considered. Additionally, its thermal stability needs attention during processing. Using commercial products that have undergone microencapsulation treatment can effectively improve this.

Melamine CyanurateIt is currently one of the most widely used nitrogen-based flame retardants. It is a white powder that has little effect on the color of products, and it also has the advantages of low smoke and low toxicity. It is widely used in components requiring good insulation and appearance, such as electronic connectors and low-voltage electrical enclosures.

Points to note:Its flame retardancy is not as efficient as red phosphorus, and the typical addition amount is 10% or higher, which can weaken the mechanical properties (especially toughness) of the material. In addition, MCA is prone to moisture absorption, which may affect the electrical performance of products in humid environments.