In the cable industry, product performance is no longer evaluated solely in terms of conductivity, mechanical strength, and service life. Particularly for cables used in buildings and environments with high human occupancy, fire behavior plays a critical role in safety, technical specifications, and project requirements.

This is where HFFR compounds (Halogen-Free Flame Retardant compounds) stand out, offering properties that contribute to low smoke generation, halogen-free cable construction, and reduced flame propagation.

However, selecting the right HFFR compound requires more than simply comparing technical data sheets. The cable’s final application, required performance criteria, extrusion line characteristics, and manufacturing conditions should all be evaluated together.

LYS Polychem offers HFFR compound solutions for cable manufacturers with different application and processing requirements.

What Should Cable Manufacturers Consider When Selecting an HFFR Compound?

Using an HFFR compound does not automatically mean that the finished cable will meet every technical requirement.

When selecting an HFFR compound, cable manufacturers should evaluate the cable’s end-use application, required performance criteria, cable design, and production line characteristics as a whole.

1. Define the Cable’s Final Application

Power cables, control cables, indoor installation cables, and industrial cables do not share the same technical requirements.

The final application may directly influence criteria such as:

• Flame retardancy

• Smoke density

• Halogen content

• Mechanical strength

• Flexibility

• Temperature resistance

• Ageing performance

• Surface quality

For this reason, before selecting an HFFR compound, manufacturers should clearly define where the cable will be used and under which operating conditions.

2. Define the Required Test and Performance Criteria

The tests and technical requirements applicable to the finished cable play a key role in HFFR compound selection.

The following criteria should ideally be defined at the beginning of the product development process:

• Flame propagation

• Smoke density

• Halogen gas emissions and gas acidity

• Tensile strength

• Elongation at break

• Temperature resistance

• Performance after ageing

• Project-specific technical requirements

Selecting a compound before these technical expectations are clearly defined may result in repeated testing, production delays, additional sample costs, and a longer transition to serial production.

3. Evaluate Compatibility with the Extrusion Line

Due to their formulation structure and mineral filler content, HFFR compounds may exhibit different processing characteristics compared with standard thermoplastic materials.

During production, parameters such as the following should be evaluated:

• Extrusion temperatures

• Screw design

• Line speed

• Die design

• Pressure balance

• Cooling conditions

• Surface finish

• Material feeding conditions

For this reason, HFFR compound selection should be based not only on laboratory data but also on the material’s processability on the actual production line.

A compound that is not suitable for a specific application or extrusion line may lead to unstable extrusion, surface defects, reduced line speeds, or increased scrap rates.

4. Do Not Overlook Mechanical Performance

When selecting an HFFR compound, focusing solely on low-smoke and flame-retardant properties is not sufficient.

Mechanical criteria that may affect the application performance and service life of the finished cable should also be considered, including:

• Tensile strength

• Elongation at break

• Flexibility

• Brittleness behavior

• Thermal resistance

• Surface quality

• Properties after ageing

The appropriate balance between fire performance and mechanical performance should be established according to the cable’s intended application.

5. Evaluate Insulation and Outer Sheath Applications Separately

The technical requirements of cable insulation and outer sheath applications may differ significantly.

When selecting a compound, it should be clearly defined in which layer of the cable the material will be used.

For insulation applications, electrical and mechanical properties may be more prominent, while outer sheath applications may require greater focus on environmental resistance, surface quality, and mechanical protection.

Correctly defining the application enables the appropriate HFFR compound group to be identified more quickly.

6. Consider the Compound Manufacturer’s Technical Support

Every cable manufacturer operates with different extrusion lines, equipment, cable designs, and processing conditions.

For this reason, when selecting an HFFR compound manufacturer, the decision should not be based solely on product price or technical data sheets. The supplier’s ability to provide application-specific technical support should also be considered.

Technical support can contribute to areas such as:

• Identifying suitable compound alternatives

• Evaluating production parameters

• Optimizing initial production trials

• Reducing processing-related issues

• Shortening the transition to serial production

How Does the Right HFFR Compound Improve Production Efficiency?

Selecting the right HFFR compound affects not only the technical performance of the finished cable but also production costs and operational efficiency.

An HFFR compound that is suitable for both the application and the production line can contribute to:

• More stable extrusion processes

• Better-controlled surface quality

• Reduced scrap rates

• Fewer production line interruptions

• Reduced need for repeated testing

• Shorter product development cycles

• More consistent quality in serial production

• Easier response to technical specification requirements

For this reason, HFFR compound selection should not be evaluated solely on unit price.

A lower-priced compound that is not compatible with the production line may ultimately increase total manufacturing costs due to reduced line speeds, higher scrap rates, surface defects, or failed testing.

Compound selection is therefore a technical and strategic decision involving production, quality, R&D, purchasing, and sales teams.

What Information Should Be Provided When Requesting an HFFR Compound?

Clearly communicating technical requirements helps cable manufacturers and compound suppliers evaluate suitable HFFR solutions more efficiently.

When requesting an HFFR compound or arranging a sample trial, manufacturers can provide information such as:

• Type of cable to be produced

• Final application of the cable

• Required test and performance criteria

• Extrusion line specifications

• Screw and die configuration

• Current processing temperatures

• Target line speed

• Mechanical performance expectations

• Surface quality requirements

• Existing production challenges

• Required sample or serial production quantity

Providing this information helps identify the appropriate HFFR compound group and enables the sampling process to be planned more efficiently.

LYS Polychem HFFR Compound Solutions for the Cable Industry

LYS Polychem is a material manufacturer that develops and produces compound solutions for different applications within the cable industry.

Its HFFR compound solutions for cable manufacturing can be evaluated according to the cable manufacturer’s final application, processing conditions, and targeted technical requirements.

Contact LYS Polychem for the Right HFFR Compound for Your Cable Production

Every cable application has different technical requirements and processing conditions. Therefore, HFFR compound selection should be based on the cable’s final application, targeted performance, and production line characteristics.

To learn more about HFFR compound solutions for cable manufacturing and discuss suitable options for your production requirements, contact LYS Polychem.