LFT-G® PP GF40 (LGF40) – High Stiffness Homopolymer
LFT-G® PP GF40 (Model: LFT-G®PP-NG04) is an advanced thermoplastic composite consisting of a highly crystalline Homopolymer Polypropylene (Homo-PP) matrix reinforced with 40% Long Glass Fibers (LGF). Designed for extreme structural integrity, it bridges the gap between standard engineering plastics and die-cast metals.
When engineers search for PP GF40, they typically encounter short-fiber materials that offer decent stiffness but suffer from extreme brittleness and poor fatigue life. LFT-G® PP-NG04 eliminates this fundamental compromise. By utilizing a specialized pultrusion manufacturing process, the continuous 10-12mm glass fibers are fully impregnated and preserved within the pellet.
During the injection molding process, these long fibers intertwine to create a robust 3D internal skeleton. This allows the rigid Homopolymer base to achieve a massive flexural modulus (up to 10 GPa) while maintaining an impressive notched impact strength of 30 kJ/m². It is the definitive lightweight solution for replacing heavy aluminum brackets in automotive and industrial engineering.
Why Choose Long Fiber Homopolymer PP GF40?
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● The Stiffness-Toughness Balance:
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Standard Homo-PP GF40 is notoriously brittle. Our long fiber network acts as an internal shock absorber. It arrests crack propagation, allowing you to design thinner, stiffer walls that pass strict crash safety standards without brittle fracture.
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● Superior Fatigue Endurance:
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In dynamic moving parts, short glass fibers debond from the resin under cyclic stress, causing rapid failure. LFT-G® technology ensures strong chemical coupling along the continuous fiber, enabling components to endure millions of vibration cycles in engine bays or machinery.
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● Minimal Creep Deformation:
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Polypropylene can distort under constant static load. The high-density 40% long fiber skeleton mechanically locks the polymer chains, dramatically reducing creep and ensuring lifetime dimensional accuracy.
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● Weight & Cost Reduction:
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Offers a 30-40% weight saving compared to die-cast aluminum or magnesium, while eliminating secondary anti-corrosion treatments and machining costs.
Technical Data Sheet: LFT-G® PP-NG04
| Property | Test Standard | Unit | Typical Value |
|---|---|---|---|
| Base Resin | - | - | Homo-Polypropylene |
| Fiber Content | ISO 1172 | % | 40% Long Glass Fiber |
| Density | ISO 1183 | g/cm³ | 1.21 - 1.23 |
| Tensile Strength | ISO 527 | MPa | 125 - 135 |
| Flexural Modulus | ISO 178 | MPa | 7,800 - 9100 |
| Notched Impact Strength | ISO 179 | kJ/m² | 35 - 38 |
| HDT (1.80 MPa) | ISO 75 | °C | 159 |
Applications: Where Toughness Meets Rigidity
Structural Carriers
Ideal for front-end modules and instrument panels. The 40% LGF Homopolymer offers immense stiffness to hold tight tolerances and the toughness to survive low-speed vehicle collisions.
Shifter Bases
Replaces heavy metal brackets in center console mechanisms. Provides a rigid, "crisp" shift feel while ensuring the housing does not shatter during knee-impact crash tests.
Industrial Housings
Perfect for heavy-duty power tools and pump casings. Resists hydrolysis better than PA6 and withstands severe internal pressure surges and drop impacts.
Frequently Asked Questions (FAQ)
Q: Is Homo-PP GF40 stronger than Copo-PP GF40?
A: Yes, in terms of absolute stiffness and tensile strength. Homopolymer PP has a highly crystalline structure, yielding a much higher flexural modulus (~10 GPa) than Copolymer. Thanks to the long glass fiber reinforcement, our Homo-PP grade also overcomes the traditional brittleness issue, offering high impact resistance.
Q: What makes Long Glass Fiber (LGF40) superior to Short Glass Fiber (GF40)?
A: In short-fiber materials, the fibers are chopped too small (<1mm) to effectively transfer stress, leading to fatigue failure. LGF40 maintains fiber lengths of 10-12mm, creating an interconnected skeleton that boosts impact strength by 2-3 times and drastically improves long-term creep resistance under heavy loads.
Q: Can LFT-G® PP-NG04 replace aluminum die-cast parts?
A: Absolutely. With its massive stiffness and low creep, this 40% LGF grade is a primary candidate for metal replacement. It allows manufacturers to reduce part weight by up to 40%, eliminate secondary anti-corrosion treatments, and lower overall production costs while maintaining structural safety.
Ready for High-Impact Performance?
Don't compromise between stiffness and toughness. Contact the LFT-G® engineering team for material selection and pricing.
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