1.Composition Differences
The core characteristic of halogen-containing PCBs lies in their use of halogen-based flame retardants, whereas halogen-free PCBs completely eliminate halogen components. This difference in composition is the most fundamental distinction between the two and determines their subsequent performance characteristics and application ranges.
2.Environmental Performance
Halogen-free PCBs offer significant advantages in terms of environmental performance. Halogen-based flame retardants may release toxic and hazardous gases-such as dioxins-during combustion, which not only pollute the environment but also pose risks to human health. In contrast, halogen-free PCBs do not emit such harmful gases when burned, making them more aligned with modern green environmental concepts.
3.Flame Retardancy
Although the flame-retardant mechanism of halogen-free PCBs differs from that of halogen-containing PCBs, their flame retardancy has met the requirements of most application scenarios through the use of advanced materials and design optimization. Even in specific fields with extremely high demands for flame retardancy, halogen-free PCBs have gradually achieved substitution through continuous technological improvements.
4.Application Fields
Due to their lower cost, halogen-containing PCBs are still used in some traditional fields with less stringent environmental requirements, such as certain consumer electronics and home appliances. Halogen-free PCBs, leveraging their environmental advantages, are widely used in high-end sectors such as new energy, automotive electronics, and aerospace. For example, in the circuit systems of new energy vehicles, halogen-free PCBs better meet the dual requirements of safety and environmental protection.
