PPF
SIMTEX™ SFE-2000-N Conjugate Filament Yarn
UBE Exsymo ? SRPP-FILAMENT
Manufacturer page / TDSDescription
Self-reinforcing conjugate filament with PE shell / highly oriented PP core. Official thermal shrinkage: 6–8% after 30 min at 140°C; recommended fabric sealing range: 120–140°C. UBE Exsymo states approximately twice the strength and three times the elastic modulus of conventional PP fiber. Official sources: https://www.ube-exsymo.co.jp/en/products/simtex_cf.html ; https://www.ube-exsymo.co.jp/en/products/PDF/simtex_conjugate_filament_introduction.pdf
Comparative overview
High-performance polypropylene fiber — HMPP / Innegra-type fiber
Strengths: Very low density, high elongation, impact tolerance, damping and excellent dielectric transparency at low-to-moderate material cost.
When to use: Select for impact skins, luggage, helmets, automotive underbody, marine/sporting hybrids and radome/antenna structures needing toughness without conductivity.
Key tradeoffs: Low stiffness and poor heat/fire capability; creep and bonding must be managed. Usually hybridized with a stiffer fiber for structural loads.
Qualitative ratings (1–10 scale)
| Relative cost | 5/10 — Moderate — specialty high-modulus polypropylene above commodity PP but below aramid/UHMWPE/PBO. |
|---|---|
| EM transparency | 10/10 — Exceptional — polypropylene is an excellent dielectric and RF transparent. |
| Temperature / fire resistance | 1/10 — Very low — low melting temperature makes it unsuitable for hot/fire-critical structures. |
| Impact / penetration resistance | 8/10 — Very high — very low density and about 9.5–10% elongation support strong low-velocity energy dissipation; ballistic role is mainly as a hybrid. |
| Electrical / thermal conductivity | 1/10 — Very low — electrically insulating with low thermal conductivity. |
| Specific tensile strength | 3/10 — 3/10 | 794.0 kN·m/kg | Class median |
| Atmospheric durability | 5/10 — Moderate — very low moisture uptake, but polypropylene is vulnerable to UV and thermo-oxidative ageing unless well stabilized. |
| Sustainability (CO₂e) | 8/10 — 2.20 kg CO₂e/kg fiber — Low emissions — data quality: Low |
Technical properties
Applications and processing
Automotive parts; underbody shields; luggage; protective equipment; helmets; electronic housings; panels; sports and leisure productsWeaving; mesh manufacture; hot pressing; thermoforming; self-reinforced composite fabric and sheet production