OVERVIEW
Farrprene IF458A is a soft, highly flexible compound for seals, grips and tactile overmoulds. Supplied as a natural filled grade optimised for injection-moulding, it pairs the soft-touch feel of rubber with the clean, fast processing of a thermoplastic - no curing, fully re-meltable scrap.
The grade delivers a tensile strength of 5 MPa, elongation at break of >750%, and a specific gravity of 0.950. Its high melt flow (MFI 30 g/10 min at 190°C/5 kg) fills thin-wall and complex injection geometries with short cycle times. Heat Stabilized.
This is a SEBS-based compound. SEBS is the hydrogenated form of SBS: removing the double bonds from the mid-block gives it substantially better resistance to UV, heat and oxidation, which is why it is the usual choice for parts that see sunlight, warm service or a long design life.
At 62 g/10 min (230°C/5 kg) it is a moderate-flow injection grade, better suited to thicker sections than to thin-wall or long-flow tooling. Its specific gravity of 0.950 reflects the mineral filler loading, which is what buys the dimensional stability and cost position of a filled grade.
TECHNICAL PROPERTIES
- HARDNESS
- 45 Shore A
- TENSILE STRENGTH
- 5 MPa
- ELONGATION AT BREAK
- >750%
- SPECIFIC GRAVITY
- 0.950
- MFI (230°C / 5 KG)
- 62 g/10 min
- MFI (190°C / 5 KG)
- 30 g/10 min
- APPEARANCE
- Natural
Typical average values from a limited sample set; not a formal specification. Request the signed datasheet for current values.
TYPICAL APPLICATIONS
- Flexible seals, gaskets and bellows
- Soft-touch overmoulds and tactile grips
- Flexible tubing and protective profiles
- Construction profiles, gaskets and weatherstripping
- Consumer products, soft-touch overmoulds and grips
PROCESSING
- Runs on standard injection-moulding equipment; pre-drying is generally not required for unfilled grades.
- Filled formulation tuned for cost-efficiency and dimensional stability.
- Heat-stabilised: the additive package is intended to limit degradation during processing and repeated re-melting of regrind.
- SEBS-based: the hydrogenated backbone gives better UV, thermal and oxidative stability than an SBS compound.
- Colour-matchable and re-processable - production scrap can be re-melted and reused.