LFT-G® HPP-LCF40B | Ultra-Rigid PP CF40: The Magnesium Alternative
LFT-G® 40% Long Carbon Fiber PP (Homo Grade)
When 30% carbon isn't stiff enough, and aluminum is too heavy, LFT-G® HPP-LCF40B is the engineered answer. This grade represents the pinnacle of Polypropylene stiffness, designed specifically to replace Magnesium AZ91 and Aluminum die-castings in weight-critical structures.
By reinforcing a highly crystalline Homopolymer PP matrix with 40% Long Carbon Fibers, we achieve a Flexural Modulus exceeding 22,000 MPa. Unlike Copolymer grades which prioritize impact, this Homo-grade prioritizes absolute structural rigidity and dimensional stability. It is the ultimate choice for large, long-span frameworks that must not bend or warp under load, while offering natural EMI shielding properties.
- √ The Magnesium Killer: Offers a specific stiffness (stiffness-to-weight ratio) superior to Magnesium alloys, at a lower manufacturing cost (injection vs. die-casting).
- √ Zero Creep Deformation: The dense 40% fiber network locks the Homo-PP matrix in place, preventing sagging even under sustained static loads at 100°C.
- √ EMI Shielding: The high carbon content creates a robust conductive network (10-100 Ω/sq), effectively blocking electromagnetic interference for EV electronics.
Typical Material Properties (HPP-LCF40B)
The following values are typical data for LFT-G® HPP-LCF40B (National Carbon / Homopolymer) and are for reference only. Data is for Dry-As-Molded (DAM) state. Please contact us for the official Technical Data Sheet (TDS).
Mechanical Properties
| Property | Test Method | Value (DAM) |
|---|---|---|
| Tensile Modulus | ISO 527 | 17,000 MPa |
| Tensile Strength | ISO 527 | 135 MPa |
| Tensile Strain at Break | ISO 527 | 1.2 % |
| Flexural Modulus | ISO 178 | 12,600 MPa |
| Notched Izod Impact (23°C) | ISO 180/A | 50 kJ/m² |
| Surface Resistivity | ASTM D257 | 102 - 10³ Ω/sq (High Shielding) |
Thermal & Physical Properties
| Property | Test Method | Value |
|---|---|---|
| Density | ISO 1183 | 1.04 g/cm³ |
| HDT/A (1.8 MPa) | ISO 75 | 162 °C |
| HDT/C (8.0 MPa) | ISO 75 | 115 °C |
| Melting Temperature | ISO 11357 | ~165 °C |
| Mold Shrinkage (Flow) | ISO 294-4 | 0.1 - 0.2 % |
Processing Information
The following values are recommendations. We recommend desiccant / dry air dryers (moisture content below 0.1%).
High fiber content increases viscosity. Use slightly higher temperatures and pressures compared to standard PP.
| Parameter | Recommendation |
|---|---|
| Drying Temperature | 80 - 100 °C |
| Drying Time | 2 - 3 hours |
| Melt Temperature (Nozzle ③) | 230 - 270 °C |
| Mold Temperature (Zone ②) | 50 - 80 °C |
| Back Pressure | Very Low (preserve fibers) |
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