LFT-G® PP GF30-NG03 is a high-performance thermoplastic composite comprising a stiff Homopolymer Polypropylene (Homo-PP) matrix reinforced with 30% Long Glass Fibers (LGF). Unlike standard short fiber compounds, it is engineered to deliver a rare combination of high flexural modulus and exceptional notched impact strength (35 kJ/m²), making it the ideal metal replacement material for structural automotive and industrial components.
Engineers sourcing materials often search for PP GF30 expecting a tradeoff: choose Homopolymer for stiffness but accept brittleness, or choose Copolymer for toughness but lose rigidity. LFT-G® HPP-NG03 eliminates this compromise. By utilizing our proprietary pultrusion technology, we preserve fiber lengths of 10-12mm within the pellet. These long fibers form an entangled 3D skeletal network inside the molded part, effectively arresting crack propagation. This allows the rigid Homo-PP base to withstand sudden high-energy impacts without shattering, outperforming traditional short fiber reinforced Nylon (PA6) in moisture-heavy environments while reducing weight by 20%.
Scenario: The "Stiffness vs. Toughness" Dilemma
In applications like automotive instrument panel carriers or industrial fan blades, the part must be rigid enough to prevent vibration (requiring Homopolymer) but tough enough to survive assembly snaps and crash tests (requiring Copolymer). Standard Short Fiber PP GF30 often fails the impact test. LFT-G® HPP-NG03 solves this by embedding 30% Long Glass Fibers into a high-crystallinity Homopolymer matrix (Feature). The physical entanglement of the long fibers acts as a shock absorber, boosting the Notched Impact Strength to 35 kJ/m² (Advantage). This benefits your production by allowing you to design thinner, stiffer walls that meet safety crash standards without the risk of brittle fracture during installation or use.
Figure 1: High stiffness combined with crash safety.
Quality: Superior Fatigue Endurance
While static strength is important, dynamic durability is critical for moving parts. Short glass fibers in standard PP GF30 tend to debond from the matrix under cyclic stress, leading to rapid fatigue failure. LFT-G® utilizes a specialized chemical coupling agent and long-fiber impregnation process (Feature). This ensures a strong bond between the fiber and the Homo-PP resin, allowing the 30% fiber network to bridge micro-cracks and resist separation (Advantage). Consequently, components made from NG03 can endure millions of vibration cycles in engine bays or machinery, significantly extending product service life and reducing warranty claims (Benefit).
Figure 2: Long fibers resist cyclic fatigue failure.
Technical Data Sheet (Model: LFT-G® HPP-NG03)
| Property | Test Standard | Unit | Typical Value |
|---|---|---|---|
| Base Resin | - | - | Homo-Polypropylene |
| Fiber Content | ISO 1172 | % | 30% Long Glass Fiber |
| Density | ISO 1183 | g/cm³ | 1.11 |
| Tensile Strength | ISO 527 | MPa | 118 - 125 |
| Tensile Modulus | ISO 527 | GPa | 7.0 - 8.0 |
| Flexural Strength | ISO 178 | MPa | 155 - 165 |
| Notched Impact Strength | ISO 179 | kJ/m² | 35 |
| HDT (1.80 MPa) | ISO 75 | °C | 156 |
Case Study: Automotive Shifter Base (Console)
The Challenge
An automotive OEM needed to replace a metal bracket for a center console gear shifter mechanism. The part required high stiffness to prevent "mushy" shift feel but needed to pass stringent impact crash tests (knee impact). Standard PA6-GF30 was too expensive and absorbed moisture, affecting shift precision.
The LFT-G® Solution
LFT-G® HPP-NG03 (Homo-PP 30% LGF) was implemented. The Homo-PP matrix provided the necessary rigidity (7.5 GPa Modulus) for a crisp shift feel. Crucially, the 35 kJ/m² impact strength ensured the housing did not shatter during crash simulations. The material switch reduced part weight by 35% and cost by 25% compared to the metal/nylon hybrid design.
Applications: Toughness Meets Rigidity
People Also Ask
Q: Is Homo-PP GF30 stronger than Copo-PP GF30?
A: Yes, in terms of stiffness and tensile strength. Homo-PP (NG03) has a more crystalline structure, making it stiffer (Modulus ~7.5 GPa) and more heat resistant than Copo-PP. With long fiber reinforcement, it also overcomes the traditional brittleness of homopolymers.
Q: What is the impact strength of LFT-G® PP GF30?
A: Our HPP-NG03 grade offers a Notched Izod Impact strength of 35 kJ/m². This is significantly higher than standard short fiber PP GF30 (typically 10-15 kJ/m²), making it suitable for crash-relevant automotive parts.
Q: Can this material be recycled?
A: Yes, fully recyclable. As a thermoplastic, LFT-G® PP GF30 can be reground and remolded. While fiber length reduces slightly during recycling, it retains better properties than recycled short fiber materials.
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