Flame-Retardant TPV is a thermoplastic elastomer developed for applications where elastic performance needs to be combined with defined flame-retardant properties. Different grades can be formulated for specific hardness levels, processing methods and fire-performance requirements, making them suitable for selected electrical, automotive, cable and industrial components.
Material selection should be based on the actual grade, flame-retardant system, test standard, hardness and service conditions rather than a general TPV specification. Suitable grades can be processed using thermoplastic methods such as injection molding and extrusion.
Nianjing supports sourcing by manufacturer and grade, as well as specification-based requirements covering flame performance, hardness, processing method, application and quantity. TDS, SDS and relevant technical or compliance documentation can be requested for material verification.
Flame-retardant TPV performance varies between formulations. A suitable grade should be evaluated according to both its fire behavior and the mechanical requirements of the finished component.
Flame-retardant performance
UL 94 classification, limiting oxygen index (LOI) and other applicable fire-performance tests may be used to evaluate a grade. UL 94 V-0 should not be treated as a universal property of Flame-Retardant TPV because the classification applies to a specific formulation and test specimen under defined conditions.
Halogen-free options
Halogen-free formulations are available for applications with specific environmental or smoke requirements. Whether a material meets a particular halogen-free or customer specification should be confirmed through the manufacturer's technical documentation and test reports.
Hardness and mechanical performance
Flame-retardant additives can affect hardness, flexibility and processing behavior. The appropriate Shore A or Shore D level should therefore be selected together with the required flame performance, tensile properties and compression recovery.
Temperature and aging performance
Operating temperature is grade-specific. Applications exposed to elevated temperatures should be evaluated using the manufacturer's heat-aging data together with the actual service temperature and exposure time.
| Property | Selection Basis | Reference |
| Flame retardancy | Grade and test condition dependent | UL 94 / applicable standard |
| Limiting oxygen index | Grade dependent | Applicable test method |
| Halogen content | Formulation dependent | Manufacturer specification / test report |
| Hardness | Grade dependent | ISO 868 / ASTM D2240 |
| Density | Grade dependent | ISO 1183 |
| Tensile strength | Grade dependent | ISO 37 / ASTM D412 |
| Elongation at break | Grade dependent | ISO 37 / ASTM D412 |
| Compression set | Grade and test condition dependent | ISO 815 / ASTM D395 |
| Heat aging | Grade and test condition dependent | Manufacturer specification |
| Melt flow / processing behavior | Grade and process dependent | Manufacturer specification / applicable test method |
The values should be taken from the current TDS of the selected grade. Flame-retardant additives, polymer composition and processing conditions can affect the final properties.
Flame-retardant TPV can be considered for components where flexibility, elastic recovery or thermoplastic processing are required together with defined fire-performance requirements.
Selected grades can be evaluated for connectors, grommets, protective components and other electrical parts where flame performance and electrical properties need to be considered.
Suitable formulations may be considered for cable jackets, flexible cable components and protective profiles. Selection should take into account flame performance, flexibility, electrical requirements, temperature exposure and the relevant cable standard.
Applications may include selected wire-protection components, seals, grommets and flexible covers. For engine-compartment or other demanding environments, heat aging, oil resistance and flame performance should be verified for the specific grade.
For industrial equipment, rail-related components and other regulated applications, additional requirements may apply to smoke, flame spread, environmental resistance or industry-specific standards. These requirements should be defined before grade selection.
Processing conditions should be established from the selected grade and equipment rather than applying one temperature range to all flame-retardant TPV.
Injection molding can be used for molded seals, housings, grommets and other components. Melt temperature, injection speed, holding pressure and mold conditions should be adjusted according to the grade and part design.
Extrusion is suitable for selected tubes, profiles, protective sleeves and continuous sections. Die design, melt temperature, screw configuration and line speed can affect surface quality and dimensional stability.
Drying and material preparation should follow the manufacturer's processing recommendations. A fixed drying temperature and time should not be applied to every grade without supporting data.
Regrind may be possible for clean production scrap when permitted by the grade and application. Regrind content should be controlled because repeated thermal processing can affect material properties and flame performance. For safety-critical or regulated applications, reprocessed material should be validated before production.
Color matching should be evaluated together with the flame-retardant system because some colorants or additive combinations may affect the final flame classification. For demanding applications, the finished colored formulation should be tested rather than relying only on the base material rating.
Selecting a flame-retardant TPV should start with the requirements of the finished component.
For an existing material, the manufacturer, grade number and current TDS are the most useful starting references. For a new application, the following information can help identify a suitable grade:
| Requirement | Information to Confirm |
| Application | Cable component, seal, grommet, connector, profile or molded part |
| Flame performance | UL 94 class or other required fire standard |
| Halogen requirement | Halogen-free or specified formulation requirement |
| Hardness | Required Shore A or Shore D range |
| Processing | Injection molding, extrusion or other process |
| Temperature | Normal and peak operating conditions |
| Mechanical performance | Tensile strength, elongation, compression set or flexibility |
| Chemical exposure | Oil, fuel, detergent or other media |
| Electrical requirements | Insulation, dielectric or other specified properties |
| Quantity | Trial quantity and regular order volume |
| Documentation | TDS, SDS, test reports and applicable compliance documents |
Nianjing can support both grade-based sourcing and specification-based sourcing. If a specific manufacturer and grade are already known, sourcing can start from the existing reference and its technical documentation. For a new application, Nianjing can work from the required hardness, flame rating, processing method, operating environment and quantity to identify suitable material options.
Before procurement, the selected grade should be checked against its current TDS and relevant flame-retardant test documentation. For applications subject to customer, automotive, cable, transportation or other industry standards, the complete requirement should be confirmed before material approval.
The required rating depends on the finished product and applicable standard. UL 94 V-0 may be required for some electrical or electronic components, while other applications may follow different fire-performance criteria. The target standard should be confirmed before selecting the grade.
No. Different flame-retardant systems can be used in these materials. If halogen-free performance is required, the formulation and relevant test documentation should be verified with the manufacturer rather than inferred from the product name.
Many grades are designed for thermoplastic processing, including injection molding and extrusion. The suitable process and processing window depend on the specific formulation and grade.
Flame-retardant additives can affect the hardness, flexibility and melt behavior of the base material. Achieving a combination of low hardness, high elasticity and strong flame performance may therefore require a specialized formulation.
An existing manufacturer and grade are the best starting points. For a new requirement, provide the application, required flame rating, halogen-free requirement, hardness, processing method, operating temperature, mechanical or electrical requirements and expected quantity.
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