LSZH‑228BK

Introduction to LSZH-228BK Cable Compound

The modern cable manufacturing industry requires materials that not only deliver high performance, but also superior safety, durability, and environmental responsibility. As infrastructure evolves—particularly in sectors such as transportation systems, data centers, residential construction, and industrial automation—cable insulation and sheath materials must meet increasingly stringent regulatory and performance requirements. One such advanced material is LSZH-228BK, a specialized, low-smoke, halogen-free compound designed for high-safety cable applications.

LSZH-228BK combines flame retardancy, minimal smoke generation, reduced toxicity, and strong mechanical properties that make it an essential component for the design of next-generation cables. This compound is highly valued for its ability to maintain cable performance even in harsh environments while significantly reducing safety hazards in the event of a fire.

Mean of LSZH

LSZH stands for Low Smoke Zero Halogen. This classification describes cable compounds that are engineered to eliminate halogenated gases - such as chlorine, fluorine, bromine and iodine - when exposed to fire or extreme heat. Unlike PVC and other halogenated polymers that release corrosive and toxic gases, LSZH compounds are formulated to produce:

• Zero halogen acids
• Minimal smoke density
• Lower toxic emissions
• Non-corrosive gases

Specifically for LSZH-228BK, the "BK" often refers to the black color, which is usually achieved by using carbon black additives that increase UV resistance and outdoor durability.

How LSZH-228BK differs from standard cable compounds

Conventional cable jacket materials - including PVC, PE or rubber compounds - focus primarily on mechanical protection without significant consideration of the emission behavior during combustion. LSZH-228BK differs in the following ways:

Composition

Unlike PVC, which is based on chlorine-containing resins, LSZH compounds contain metal hydroxides and non-halogenated polymers.

Combustion characteristics

LSZH-228BK produces very little toxic smoke and releases no halogenated acids, which improves discharge safety and reduces damage to equipment.

Regulatory compliance

Complies with modern global safety and environmental standards such as IEC, UL, RoHS and REACH.

Thermomechanical behavior:

LSZH compounds, including LSZH-228BK, maintain structural integrity under thermal and mechanical stress in a way that many standard compounds cannot.

Why is LSZH-228BK popular in high-safety cable design?

The popularity of LSZH-228BK is largely due to the growing demand for materials that:

• Provide maximum fire safety
• Reduce human health risks
• Protect sensitive electronic systems from corrosive gases
• Comply with new regulations requiring environmentally friendly cable materials

Industries now prefer LSZH-228BK due to its balance between mechanical performance, flame resistance and environmental responsibility. In locations such as hospitals, airports, power plants and public infrastructure, this combination greatly reduces the risks associated with fire emergencies.

Key Features of LSZH-228BK Compound

LSZH-228BK is engineered to meet the required performance expectations while minimizing safety risks. The compound offers a set of advanced features that set it apart from older compound formulations.

Halogen-free in case of fire

A distinctive feature of LSZH materials is their halogen-free formulation. Traditional materials such as PVC release hydrogen chloride and other corrosive gases when burned. However, LSZH-228BK:

• Completely eliminates halogen gas emissions
• Prevents corrosion of metals and electronics
• Expands evacuation windows by reducing inhalation hazards

This feature is essential in confined environments such as tunnels, trains, server rooms and ships, where ventilation may be limited.

Low Smoke Density and Toxicity Level

In a fire scenario, smoke-induced obstruction of vision and inhalation of toxic substances are the leading causes of injury or death. LSZH-228BK emits:

• Significantly lower optical smoke density
• Fewer toxic gases than chlorine or bromine compounds
• Minimal soot deposition, reducing post-fire cleanup

This compound meets international low-smoke standards and is often used where human safety is a top priority.

 Mechanical and thermal stability for cable sheathing

Despite being halogen-free, LSZH-228BK maintains impressive mechanical performance, such as:

• High tensile strength and elongation for flexibility and durability
• Resistance to tearing, abrasion and deformation
• Stable mechanical performance over a wide temperature range
• Excellent UV and weather resistance, especially in the black BK formulation

These properties make this compound suitable for both indoor and outdoor applications, including those requiring long-term exposure to sunlight or harsh environmental conditions.

Applications of LSZH-228BK in cable manufacturing

LSZH-228BK is used in several cable categories due to its versatility and superior performance in safety-sensitive environments.

Use of LSZH-228BK in power cables

Power cables often operate in environments where fire safety and longevity are of paramount importance. LSZH-228BK is widely used for:

• Covering low voltage power cables
• Installation of renewable energy cables
• Power distribution systems in buildings
• Emergency circuits and fire-resistant cable networks

Its flame retardancy ensures that circuits remain operational for longer in fire conditions, allowing emergency systems - such as alarms and evacuation lighting - to continue operating.