OVERVIEW
Farrprene IU550A is a versatile medium-hardness compound for general-purpose flexible parts and two-shot overmoulding. Supplied as a translucent unfilled 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 6 MPa, elongation at break of >800%, and a specific gravity of 0.890. A balanced melt flow (MFI 5.1 g/10 min at 190°C/5 kg) suits a wide processing window. UV Stabilized · 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 21 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 0.890 is typical of an unfilled compound, which gives more parts per kilogram and the cleanest colour reproduction.
TECHNICAL PROPERTIES
- HARDNESS
- 55 Shore A
- TENSILE STRENGTH
- 6 MPa
- ELONGATION AT BREAK
- >800%
- SPECIFIC GRAVITY
- 0.890
- MFI (230°C / 5 KG)
- 21 g/10 min
- MFI (190°C / 5 KG)
- 5.1 g/10 min
- APPEARANCE
- Translucent
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
- Automotive interior trim, NVH and sealing components
- Footwear outsoles, straps and flexible components
PROCESSING
- Runs on standard injection-moulding equipment; pre-drying is generally not required for unfilled grades.
- Unfilled formulation for the cleanest surface finish and colourability.
- Heat-stabilised: the additive package is intended to limit degradation during processing and repeated re-melting of regrind.
- UV-stabilised for components exposed to sunlight. Real service life depends on exposure, colour and section thickness, so qualify an outdoor part against its actual duty cycle.
- 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.