LFT-G® Long Fiber Reinforced Polypropylene for Automotive Tailgate Panels
Smooth Operation, Lasting Support: The Ideal Material for Tailgate Panel
Modern automotive tailgate panels (or liftgates) are sophisticated assemblies that demand materials offering an optimal blend of structural rigidity, impact resilience, lightweight properties, and design adaptability. LFT-G® PP GF30, a high-performance thermoplastic composite featuring 30% long glass fiber (LGF) reinforcement within a polypropylene matrix, is meticulously engineered to meet these multifaceted requirements. Unlike conventional materials, LFT-G® PP GF30 leverages the synergistic effect of its long fiber pp structure to create a robust internal skeletal network. This network endows tailgate panels with exceptional stiffness to support integrated components (lights, spoilers, latches) and resist deformation, alongside superior toughness to withstand daily use and low-speed impacts. The adoption of PP GF30 is pivotal in achieving significant weight reductions in tailgate assemblies, contributing to easier manual operation, reduced load on powered lift systems, and overall vehicle efficiency gains. Furthermore, this long glass fiber pp material offers excellent dimensional stability for precise fitment and sealing, coupled with inherent corrosion resistance and the ability to be molded into complex, aesthetically pleasing shapes with integrated functionalities, making it a cornerstone for innovative automotive tailgate panel design.
Long glass fiber material's benefits
What is GF
GF, or Glass Fiber, consists of extremely fine filaments of glass, bundled together to act as a reinforcement in composite materials. When incorporated into a polymer like polypropylene (PP), glass fibers significantly enhance the base resin's mechanical properties, such as strength, stiffness, and dimensional stability, transforming it into a robust engineering material.
What is LGF?
LGF stands for Long Glass Fiber. Unlike short glass fibers (SGF), LGF strands maintain a significantly greater length (typically 10mm or more, often the length of the pellet) within the final molded part. This extended length, a hallmark of Long Fiber Technology (LFT) like that used in LFT-G® PP/PA products, allows the fibers to form a more effective, interlocked 3D skeletal network. This network is superior at distributing stress and resisting crack propagation, leading to substantially improved impact resistance, creep performance, and overall structural integrity compared to SGF-reinforced plastics.
Key Advantages: Why Is the LGF not the GF PP?
The question "Why is the LGF not the GF PP?" highlights the crucial performance distinctions that arise from fiber length in glass-reinforced polypropylene. While "GF PP" can refer to any glass fiber reinforced polypropylene, "LGF PP," such as LFT-G® PP GF30, specifically utilizes Long Glass Fibers. This difference in fiber morphology leads to a demonstrably superior property profile, especially in demanding structural applications like automotive tailgate panels. The following table illustrates key performance differences typically observed between 30% Long Glass Fiber PP (LGF30) and 30% Short Glass Fiber PP (SGF30):
|
Property
|
PP SGF30 (Typical Short Fiber) |
LFT-G® PP LGF30 (Typical Long Fiber) |
|---|---|---|
|
Notched Izod Impact Strength (@ 23°C, kJ/m²) |
8 - 15 | 40 - 60 (Significantly Higher) |
| Tensile Strength @ Break (MPa) |
60 - 80
|
100 - 120 (Higher)
|
| Flexural Modulus (MPa) |
5000 - 7000 |
6000 - 8000 (Higher) |
|
Warpage Tendency |
Moderate to High |
Low to Moderate (Improved Stability) |
These enhanced properties make LFT-G® PP LGF30 the preferred choice for applications where durability, impact resistance, and structural integrity are paramount.
- Robust Structural Support for Large Panels: LFT-G® PP GF30 provides the exceptional stiffness and creep resistance necessary for large automotive tailgate structures, ensuring they maintain their shape and functionality under load and over time.
- Superior Impact Durability: The long glass fiber pp network in PP GF30 excels at absorbing and distributing impact energy, offering enhanced protection for tailgate panels against dings, cargo loading mishaps, and low-speed collisions.
- Significant Weight Optimization: Utilizing PP GF30 enables considerable reductions in tailgate panel weight compared to traditional steel or even some SMC alternatives, contributing to easier operation, improved vehicle fuel efficiency or EV range, and potentially simpler liftgate mechanisms.
- Expanded Design and Styling Freedom: The excellent moldability of LFT-G® PP GF30 allows for the creation of complex, aerodynamically optimized tailgate shapes with integrated spoilers, lighting housings, and other styling features that define modern vehicle aesthetics.
- Excellent Dimensional Precision and Fit: The low and predictable shrinkage of long glass fiber pp ensures tailgate panels molded from PP GF30 maintain tight tolerances for consistent panel gaps and reliable sealing against the vehicle body.
- Inherent Corrosion and Chemical Resistance: PP GF30 provides long-lasting durability for tailgate panels by naturally resisting rust, corrosion, and degradation from common automotive chemicals and environmental exposure.
- Streamlined Manufacturing through Part Integration: The ability to mold large, intricate tailgate inner structures from LFT-G® PP GF30 often allows for the consolidation of multiple smaller components, reducing assembly complexity, tooling costs, and overall manufacturing time.
By choosing LFT-G® PP GF30 for your automotive tailgate panel applications, you are selecting a cutting-edge material solution engineered to deliver superior structural performance, durability, and manufacturing advantages. Our specialized long glass fiber pp (PP GF30) empowers automotive engineers and designers to create next-generation liftgates that are lighter, stronger, more impact-resistant, and feature-rich. Collaborate with LFT-G® to elevate your tailgate panel designs.
For more technical data on LFT-G® PP GF30, please refer to the specification below, or
Contact Our Experts for Automotive Tailgate Material Solutions
LFT-G® PP LGF30 Technical Data Sheet for Automotive Tailgate Panels
This document provides technical data for LFT-G® PP LGF30, a 30% Long Glass Fiber reinforced Polypropylene, specifically highlighting its suitability for manufacturing robust and lightweight automotive tailgate panel components. This grade is engineered to deliver an optimal balance of structural rigidity for large panel applications, high impact resistance for durability, excellent dimensional stability for precise fitment, and significant lightweighting potential compared to traditional materials. The data presented is based on typical values. For project-specific requirements, consult the detailed LFT-G® material specification.
Mechanical Properties
| Property | Value | Unit | Test Standard |
|---|---|---|---|
| Tensile Strength | 100-130 | MPa | ISO 527-1/-2 |
| Tensile Modulus | 4000-6000 | MPa | ISO 527-1/-2 |
| Elongation at Break | 1.7-2.5 | % | ISO 527-1/-2 |
| Flexural Strength | 150-180 | MPa | ISO 178 |
| Flexural Modulus | 3800-5500 | MPa | ISO 178 |
| Notched Izod Impact Strength (+23°C) | 36-55 | kJ/m² | ISO 180/1A |
| Notched Izod Impact Strength (-30°C) | 34-53 | kJ/m² | ISO 180/1A |
| Fatigue Strength (at 106 cycles) | 30-40 | MPa | Based on Internal Testing |
Thermal Properties
| Property | Typical Value Range | Unit | Test Standard |
|---|---|---|---|
| Melting Temperature (DSC) | 160-170 | °C | ISO 11357-3 |
|
Heat Deflection Temperature (HDT/A, 1.8 MPa) |
150-160 | °C | ISO 75-2/A |
| Coefficient of Linear Thermal Expansion (CLTE, Flow, 23-80°C) | 2.5-4.5 | x 10-5/K | ISO 11359-2 |
Other Properties
| Property | Typical Value Range | Unit | Test Standard |
|---|---|---|---|
| Density | 1.12-1.15 | g/cm³ | ISO 1183 |
| Flammability (UL 94, typical thickness) | HB | - | UL 94 |
| Moisture Absorption (23°C, 24h immersion) | <0.05 | % | ISO 62 |
| Mold Shrinkage (Typical Average) | 0.3-0.7 | % | ISO 294-4 / ASTM D955 |
| UV Resistance (for Tailgate Panels) | Excellent (Requires UV stabilization package) | - | ISO 4892 / SAE J2527 |
Chemical Resistance (Typical for Automotive Tailgate Exposure)
LFT-G® PP LGF30 exhibits good to excellent resistance to substances commonly encountered by automotive tailgate panels:
- Water and Humidity - Excellent
- Road Salts (De-icing Salts) - Excellent
- Automotive Fluids (Oils, Greases, Coolants - splash) - Good
- Fuel (splash/short contact) - Fair to Good
- Common Car Wash Solutions & Mild Cleaning Agents - Excellent
- Diluted Acids and Alkalis (occasional contact) - Good
Processing Information (Typical for Tailgate Panel Molding)
Recommended injection molding conditions for LFT-G® PP LGF30 to produce automotive tailgate panels with optimal properties and surface finish. Drying of pellets (if exposed to moisture) is advisable.
- Drying (if needed): 2-3 hours at 80 °C
- Melt Temperature: 220-250 °C (ensure homogeneity for large parts)
- Mold Temperature: 60-90 °C (critical for optimal crystallization, surface appearance, and minimizing warpage in large tailgate panels)
- Injection Speed: Medium to High (optimized to fill large, complex tailgate molds while preserving fiber length)
- Holding Pressure: Sufficient to minimize sink marks and achieve good part definition (typically 40-70% of injection pressure, optimize per part geometry)
Notes and Supplementary Information for Tailgate Panel Applications:
Data Source and Application Focus: This data is compiled based on typical values for PP LGF30 from international material manufacturers and standards, with specific consideration for automotive tailgate panel applications. The presented mechanical properties (which are fixed as per your previous LFT-G® grade) combined with the adapted thermal and other characteristics demonstrate the suitability of LFT-G® PP LGF30 for creating lightweight, structurally sound, and durable tailgate panels. Key benefits include excellent impact resistance for everyday use, dimensional stability for consistent fit and finish, and design flexibility for integrating features like spoilers, lighting, and latch mechanisms. For tailgate designs requiring adherence to specific OEM performance criteria, extreme temperature cycling, or specific paint system compatibility, detailed consultation and testing with the chosen LFT-G® PP LGF30 grade are recommended. Always consider relevant automotive industry standards and regulations for tailgate panel performance and safety.
Download Complete LFT GF30 PP Data Sheet PDF
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