PPF
Innegra™ S IS-430 32
Quantum Materials (Innegra) ? HMPP
Manufacturer page / TDSDescription
High-modulus polypropylene/olefin multifilament yarn with density 0.84 g/cm³. Official maximum processing temperature: 150°C. Innegra reports moisture regain below 0.1%, cold-temperature stability to -90°C, chemical resistance, impact-energy dissipation and vibration damping. Creep and dielectric values are marked TBD in the official TDS. Official sources: https://innegra5280.com/wp-content/uploads/2024/07/INNEGRA-TDS-NEW-1.26.24.pdf ; https://innegra5280.com/products/ ; https://innegra5280.com/properties/
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. Stored TDS elongation: 9%. |
| Electrical / thermal conductivity | 1/10 — Very low — electrically insulating with low thermal conductivity. |
| Specific tensile strength | 2/10 — 2/10 | 740.5 kN·m/kg | Product TDS |
| 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
| Tensile strength | 622.0 MPa |
|---|---|
| Tensile modulus | 12.972 GPa |
| Density | 0.84 g/cm³ |
Applications and processing
Impact-tolerant and lightweight hybrid composites; marine; automotive; sports; protective structures; radomes; antennas; satellites; industrial and consumer productsWoven and co-woven fabrics; co-mingled hybrids; spread tow; UD; biaxial and multiaxial reinforcements; braids; scrims; prepregs; impact and damping layers