OVERVIEW
Farrprene IF658AS is a versatile medium-hardness compound for general-purpose flexible parts and two-shot overmoulding. 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 5.5 MPa, elongation at break of >800%, and a specific gravity of 1.010. A balanced melt flow (MFI 5 g/10 min at 190°C/5 kg) suits a wide processing window. SBS Based · Heat Stabilized.
This is an SBS-based compound. SBS keeps the unsaturated double bonds in its butadiene mid-block, which hydrogenation removes when SBS is converted to SEBS. That makes SBS the more economical choice and it processes readily, but it is less resistant to UV, heat and oxidative ageing than a SEBS grade. For sustained outdoor exposure or elevated service temperature, start from a SEBS-based grade instead. Ask us to qualify the right base for your duty cycle.
At 19 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 1.010 reflects the mineral filler loading, which is what buys the dimensional stability and cost position of a filled grade.
TECHNICAL PROPERTIES
- HARDNESS
- 65 Shore A
- TENSILE STRENGTH
- 5.5 MPa
- ELONGATION AT BREAK
- >800%
- SPECIFIC GRAVITY
- 1.010
- MFI (230°C / 5 KG)
- 19 g/10 min
- MFI (190°C / 5 KG)
- 5 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
- Two-shot overmoulding onto PP/PE and rigid substrates
- General-purpose seals, grips and flexible housings
- Cable jacketing and strain reliefs
- Consumer products, soft-touch overmoulds and grips
- Automotive interior trim, NVH and sealing components
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.
- SBS-based: economical and easy to process, with lower UV and thermal ageing resistance than a SEBS grade.
- Colour-matchable and re-processable - production scrap can be re-melted and reused.