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Low Smoke Halogen-free Flame-retardant Insulation Granules for Wires and Cables from China Suppliers and Factory
Product Description
Low smoke and halogen-free materials for cables are a special material widely used in cable manufacturing, which occupies an important position in the cable industry with its unique environmental and safety performance.
1. Definition
Low smoke and halogen-free cable materials refer to materials that do not produce toxic smoke and corrosive gases during cable combustion. This material is commonly used for the insulation and sheath layers of cables to improve their environmental performance and safety.
2. Characteristics
Environmental friendliness
Low smoke and halogen-free materials do not produce toxic smoke and corrosive gases such as hydrogen halides during combustion, making them harmless to the environment and human health.
Flame retardancy
This material usually contains flame retardants such as magnesium oxide or magnesium hydroxide, which enable the cable to self extinguish or slow down the combustion rate during combustion, improving the fire resistance of the cable.
Corrosion resistance
The insulation layer of low smoke halogen-free materials has good corrosion resistance and can maintain good electrical and mechanical properties in various chemical environments.
Physical properties
This material typically has high tensile strength, good weather resistance, flexibility, and elasticity, which can meet the needs of cables in different usage environments.
3. Application
Low smoke halogen-free cable materials are widely used in various fields due to their excellent environmental and safety performance, including but not limited to:
High rise residential buildings
There is a high demand for cables and they need to meet certain fire resistance requirements. Low smoke and halogen-free cables can prevent the spread of flames without producing toxic gases, providing more time for personnel evacuation and rescue.
Important public places
Such as large and medium-sized shopping malls, airports, stations, etc., have high personnel density and difficulty in escaping. The application of low smoke and halogen-free cables can help improve the overall fire safety level.
Underground facilities
Such as tunnels and subways have poor ventilation conditions, making it difficult to extinguish fires once they occur. Low smoke halogen-free cables have a high fire resistance rating and can maintain normal power supply for a period of time during a fire.
Important facilities
Such as nuclear power plants and computer control centers have extremely high requirements for fire prevention and safety control. Low smoke and halogen-free cables can effectively prevent the spread of flames while not having a negative impact on equipment and the environment.
In industrial fields
Such as petrochemicals and power industry, cables need to be able to be used in harsh environments such as high temperature, explosion-proof, and waterproof. The structural design of low smoke and halogen-free cables makes them widely used in these fields.
4. Advantages and disadvantages
Advantages
Environmental protection
Burning does not produce toxic gases, and the residue is harmless.
Safety
It has excellent flame retardant properties and can slow down the spread of fire.
Corrosion resistance
Able to maintain good performance in various chemical environments.
Excellent physical properties
Such as high tensile strength and good weather resistance.
Disadvantages
High cost
The manufacturing process and material cost of low smoke halogen-free cables are relatively high, and the price is higher compared to ordinary cables.
Parameters
Common Specification Table
| ITEM | UNIT | Technical Requirements | ||||
|---|---|---|---|---|---|---|
| RW-WDZ-YH70 | RW-WDZ-YH90 | RW-WDZ-YH-105 | RW-WDZ-YH-125 | RW-WDZ-YH-150 | ||
| Tensile Strength | Mpa | ≥10 | ≥10 | ≥10 | ≥10 | ≥10 |
| Elongation at Break | ％ | ≥150 | ≥150 | ≥150 | ≥150 | ≥150 |
| Thermal aging temperature | ℃ | 100±2℃ | 120±2℃ | 135±2℃ | 158±2℃ | 180±2℃ |
| Thermal aging time | H | 168h | 168h | 168h | 168h | 168h |
| Elongation at break retention rate | ％ | ±25 | ±25 | ±25 | ±25 | ±25 |
| Test temperature | ℃ | -25 | -25 | -25 | -25 | -25 |
| Test results | Failure data | ≤15/30 | ≤15/30 | ≤15/30 | ≤15/30 | ≤15/30 |
| Dielectric Strength | MV/m | ≥18 | ≥18 | ≥18 | ≥18 | ≥18 |
| 20℃ Volume Resistivity | Ω.m | ≥1.0X108 | ≥1.0X108 | ≥1.0X108 | ≥1.0X108 | ≥1.0X108 |
| Temperature | ℃ | 200±3 | 200±3 | 200±3 | 200±3 | 200±3 |
| Processing time | min | 15 | 15 | 15 | 15 | 15 |
| Mechanical stress | MPa | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| Elongation under load | ％ | ≤100 | ≤100 | ≤100 | ≤100 | ≤100 |
| Maximum permanent deformation after cooling | ％ | ≤25 | ≤25 | ≤25 | ≤25 | ≤25 |
| Test temperature | ℃ | 70±2 | 70±2 | 70±2 | 70±2 | 70±2 |
| Testing time | h | 168 | 168 | 168 | 168 | 168 |
| Maximum rate of change of tensile strength | ％ | ±30 | ±30 | ±30 | ±30 | ±30 |
| Oxygen Index | ％ | ≥28 | ≥28 | ≥28 | ≥28 | ≥28 |
| Smoke Density-flame | - | ≤350 | ≤350 | ≤350 | ≤350 | ≤350 |
| Combustion releases acid in the gas | ％ | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.5 |
| HCI and HBr contents | ％ | ≤0.1 | ≤0.1 | ≤0.1 | ≤0.1 | ≤0.1 |
| HF contents | - | ≥4.3 | ≥4.3 | ≥4.3 | ≥4.3 | ≥4.3 |
| PH contents | Us/mm | ≤10 | ≤10 | ≤10 | ≤10 | ≤10 |
Support customizing other specifications
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Frequently Asked Questions (FAQ)
What are low smoke halogen-free (LSHF) cable materials?
Low smoke halogen-free cable materials are specialized compounds used for cable insulation and sheathing. They are designed not to release toxic smoke or corrosive halogen gases (such as hydrogen halides) when exposed to fire, significantly improving safety and environmental friendliness.
How do these materials achieve flame retardancy?
These materials typically incorporate flame-retardant additives like magnesium oxide or magnesium hydroxide. These compounds help the cable self-extinguish or slow down the rate of flame propagation during combustion, raising the overall fire resistance.
Where are low smoke halogen-free cables commonly installed?
They are widely used in high-safety environments including high-rise residential buildings, busy public areas (shopping malls, airports, stations), underground spaces (tunnels, subways), and critical installations like nuclear power plants and computer control centers.
What are the primary advantages of LSHF cables over standard cables?
The main advantages are environmental safety (non-toxic emissions), enhanced human safety during a fire, robust corrosion resistance in chemical environments, and excellent mechanical properties like high tensile strength and weatherability.
Are there any disadvantages to using LSHF materials?
Yes, the primary disadvantage is cost. Due to more complex manufacturing processes and specialized raw materials, the overall price of low smoke halogen-free cables is higher compared to standard PVC or rubber cables.
Can I request custom parameters for these materials?
Yes, we support the customization of other technical specifications and parameters to meet the unique needs of your specific industrial or construction applications.