China Suppliers Factory Low Smoke Halogen-Free Flame Retardant Filling Yarn Made of PP with Superior Oxygen Index
Product Description
1. Characteristics
During the combustion process, the amount of smoke generated by low smoke halogen-free flame-retardant filling ropes for cables is extremely low, which helps to reduce visual obstruction at the fire scene and improve the efficiency of personnel evacuation and rescue.
This filling rope does not contain halogen elements, so it will not release toxic hydrogen halide gas during combustion, reducing the harm to the environment and personnel.
It has excellent flame retardant properties and can to some extent prevent the spread of fire, providing additional safety protection for cables and the entire electrical system.
Due to its low smoke and halogen-free characteristics, low smoke and halogen-free flame-retardant filling ropes for cables meet environmental requirements and are conducive to sustainable development.
It usually has good high temperature resistance and can maintain stable performance in certain high temperature environments.
The filling rope needs to have good flexibility and elasticity in order to flexibly fill inside the cable while maintaining the overall structural stability of the cable.
2. Application
3. Material composition and manufacturing
4. Selection and Precautions
Parameters
Comparison of low smoke halogen-free flame-retardant filling rope, fiberglass rope, and asbestos rope
| Item | Diameter (mm) | Weight (g/m) | LOI | Eco-friendly | Proportion (g/cm³) | Smoke intensity | Usability |
|---|---|---|---|---|---|---|---|
| Fiberglass rope | 2 | 4.5 | 30 | No | 2.7 | General | Harmful |
| Asbestos rope | 2 | 4.5 | 30 | No | 2.7 | General | No eco-friendly |
| Low smoke halogen-free flame-retardant filling rope | 2 | 2 | 28 | Yes | 0.92 | Sight | Convenient, eco-friendly, and harmless |
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Frequently Asked Questions
It is a high-performance cable filling material that integrates low smoke emission, zero halogen elements, and flame-retardant characteristics to ensure safety, fire resistance, and environmental protection in electrical systems.
Halogen-free means the material does not contain toxic halogen elements. In a fire, it will not release corrosive and highly toxic hydrogen halide gases, significantly reducing environmental damage and risks to human life.
They are widely used in high-safety and eco-sensitive locations, including high-rise residential buildings, subways, tunnels, airports, shopping malls, nuclear power plants, and industrial petrochemical facilities.
Compared to fiberglass and asbestos ropes, the low smoke halogen-free filling rope is lighter (2 g/m), fully eco-friendly, non-toxic, and offers excellent usability while maintaining high fire-retardant performance (LOI 28).
You should verify that the product has valid certifications, check critical performance parameters (like LOI and temperature resistance), source from reputable manufacturers, and strictly follow the storage and handling instructions.

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