Key Specifications of PP-LGF40
Optimized for high-stress structural components, LFT-G® PP-LGF40 provides verified mechanical enhancements, striking an exceptional balance between tensile strength and dynamic impact toughness.
PP LGF40 vs. Standard PP GF40 (Short Fiber)
Why choose PP LGF40 over standard PP GF40? The crucial differentiator lies in the internal fiber skeleton. Standard short-fiber compounds use fractured, tiny glass shards that compromise structural integrity. LFT-G® PP-LGF40 preserves 10-12mm fiber lengths during compounding, building a superior mechanical web.
Standard Short PP GF40
- Average internal fiber length: less than 1.0 mm.
- Fractures easily under dynamic impact or crash energy loads.
- High isotropic mold shrinkage leads to dimensional warping.
- Accelerated equipment screw and mold cavity abrasion.
LFT-G® PP LGF40 (Long Fiber)
- Continuous fiber reinforcement (10-12mm pellets).
- 2.5x higher impact resistance and dynamic energy absorption.
- Balanced shrinkage (0.15%-0.25%) prevents structural warp.
- Lower surface abrasion during plastication & tooling cycles.
Typical Material Properties (LFT-PP-LGF40-NG04)
The typical properties detailed below represent standard metrics recorded inside the LFT-G® Polymer Characterization Facility under Dry-As-Molded (DAM) conditions. Testing complies strictly with verified ISO and ASTM standards to ensure absolute technical data verification.
Mechanical Testing Profile
| Property | Test Standard | Value (DAM State) |
|---|---|---|
| Tensile Modulus | ISO 527 | 9,200 MPa |
| Tensile Strength | ISO 527 | 135 MPa |
| Flexural Modulus | ISO 178 | 7,800 MPa |
| Flexural Strength | ISO 178 | 189 MPa |
| Charpy Notched Impact (23°C) | ISO 179 | 38 kJ/m² |
Thermal & Physical Analysis
| Property | Test Standard | Value |
|---|---|---|
| Density | ISO 1183 | 1.21 g/cm³ |
| HDT (0.45 MPa) | ISO 75 | 158 °C |
| HDT (1.80 MPa) | ISO 75 | 155 °C |
| Mold Shrinkage | ISO 294-4 | 0.15 - 0.25 % |
Processing Guidelines – Injection Molding
Pre-drying
90–100°C / 2–4h
Moisture < 0.1%
Injection
Melt 210–250°C
Mold 38–69°C Pressure 80–120 MPa
Tooling
Low-compression screw
Full round runners (Ø5–6mm) L/D 18:1–24:1
Multi-Industry Application Cases
Automotive Front-End Structural Modules
Modern electric vehicle designs prioritize weight containment to boost battery range. Our LFT-G® PP-LGF40 Black is widely specified to replace structural steel in front-end assemblies, bumper beams, and door module carriers. This transition yields a 30% to 45% component weight reduction, provides excellent energy absorption during impacts, and prevents moisture-induced mechanical fatigue.
Heavy-Duty Fluid Pump & Water Valve Housings
Industrial fluid handling parts face constant hydraulic pressure and chemical exposure. Molded with PP LGF40 composite, pump housings and impeller modules resist high torsional loads and creep over long-term operation. The continuous long fiber framework provides low isotropic shrinkage, preventing water leakage while eliminating the galvanic corrosion common with metal components.
Commercial Appliance Structural Brackets
Engineered specifically for washing machine outer tub carriers and rotational brackets. The high fiber alignment provides outstanding fatigue resistance under rapid mechanical spin cycles. Its low moisture absorption prevents water-induced dimensional swelling, guaranteeing accurate alignment and leak-free performance over thousands of operational cycles.
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