As global infrastructure moves toward higher density, smarter systems, and sustainable growth, material safety has shifted from a basic compliance requirement to a core competitive strength. Low Smoke Zero Halogen (LSZH) materials have therefore become a shared choice in industries such as transportation, telecommunications, aviation, and energy. As a long-term developer in LSZH technology, Angreen provides high-standard cable material solutions through advanced polymer design and large-scale production.
The value of LSZH materials is not limited to labels such as “halogen-free”and“low smoke.” Their real strength comes from the structure of the material system itself.
Traditional halogen-based materials like PVC release acidic and corrosive gases during burning. The smoke is dense and highly toxic. These emissions affect evacuation and cause long-term corrosion to electronic equipment after a fire, which may force systems to be replaced earlier than expected.
LSZH materials follow a different design approach. Through a halogen-free flame-retardant system and special inorganic fillers, the material achieves a more controlled and cleaner degradation process under high heat:
Much lower smoke generation: The halogen-free structure creates a cleaner breakdown path.
Low-toxicity by-products: It avoids corrosive gases like hydrogen chloride and reduces secondary damage.
Stable carbon layer: A firm char layer slows down flame spread.
Reliable electrical performance: Insulation remains stable under heat, giving critical systems more time to operate.
These features improve the survival ability of buildings, vehicles, and equipment in extreme conditions, not just “reduce danger.”
The motivation for using LSZH has moved from simple compliance to building stronger resilience.
The reasons behind its broad adoption include:
In data centers, subway tunnels, hospitals, and airport terminals, smoke toxicity is often more dangerous than flames. LSZH helps keep escape routes clear and reduces panic caused by heavy smoke.
Halogen corrosion can make many devices unusable after a fire. LSZH reduces secondary damage and improves the system’s ability to recover.
Standards such as CPR and GB31247 set strict limits on smoke and toxicity for cables and materials. LSZH meets these requirements and can be used directly in international projects.
Halogen-free materials are easier to recycle and incinerate. They do not create long-lasting pollutants and align with green manufacturing trends.
| Performance Indicators | Traditional PVC/halogenated materials: | Angreen LSZH 材料 |
| Smoke Density | High smoke concentration, obstructs vision | Significantly reduced smoke levels |
| Toxic Emissions | Produces corrosive acidic gases | No halogen gas release |
| Flame Retardant Properties | Usually relies on additional flame retardant additives | The formula itself has flame-retardant properties |
| Compliance | Banned in most high-standard projects | Meets CPR, GB31247, and other standards |
| Long-Term Stability | Prone to equipment corrosion | Does not corrode electronic components and metal structures |
LSZH is not just a material category, but a system safety upgrade solution.
Angreen relies on a CNAS-certified laboratory and uses systematic methods such as material structure analysis, flame-retardant mechanism research, and accelerated aging tests to keep improving its LSZH formulations. Its leading position in LSZH technology is supported by this certified lab and by a team of polymer modification specialists from top Chinese universities, including the University of Science and Technology of China, East China University of Science and Technology, and The Hong Kong Polytechnic University.
Angreen has also built a large-scale production system with an annual capacity of about 18,000 tons. This gives customers a stable, repeatable, and traceable supply chain.
Angreen LSZH cable materials are widely used across major industries:
● Transportation: Fire-resistant cables and electronic components for rail transit vehicles, high-speed trains, and electric vehicles.
● Fiber Optic and 5G Networks: Cable jackets and insulation for fiber cables, base station wiring, and power and signal systems in IDC data centers.
● Smart Buildings and Energy Systems: Materials used in intelligent building wiring, smart grid transmission, and power substations with high safety requirements.
These industries all share common features such as dense wiring, high passenger flow, enclosed environments, or concentrated critical equipment. LSZH materials naturally become a standard requirement in such conditions.
Angreen LSZH system demonstrates stable and reliable performance in real-world engineering environments. Its advantages are primarily reflected in:
Multiple international certifications, reducing project implementation risks;
Stable formulation, maintaining structural integrity even under thermal shock, mechanical stress, and long-term aging;
Adapting to modern green manufacturing systems and supporting corporate ESG strategies.
In the railway industry, many countries and regions have listed LSZH as the default option for tunnel and vehicle cabling. Angreen related products have been applied in multiple railway projects to replace PVC systems and meet more stringent fire resistance requirements.
With the upgrading of global safety standards and the increasing complexity of infrastructure, LSZH materials are no longer a backup option but an inevitable trend. Angreen New Materials Technology Co., Ltd., relying on its proprietary formulation system, vertically integrated R&D chain, and continuous innovation capabilities, provides customers with safer, smarter, and more sustainable material solutions, and drives the improvement of material standards in multiple key industry scenarios.
