What is PP GF40 Polymer?
Unlike standard short-fiber reinforced plastics, where fiber lengths are typically less than 1 mm, LFT-G® PP GF40 (1857) utilizes long glass fibers that often run the full length of the pellet (typically 10–12 mm). During the injection molding process, these fibers form an internal, 3D entangled fiber network skeleton that provides significantly enhanced mechanical properties.
PP GF40 is a designation for a polypropylene (PP) composite material that has been reinforced with 40% Glass Fibers (GF) by weight. The addition of this high loading of glass fibers transforms the versatile polypropylene base resin into a robust engineering thermoplastic with significantly enhanced strength, stiffness, and thermal performance. However, a critical distinction lies in the length of these fibers. LFT-G® PP GF40 represents an advanced grade of this material, utilizing Long Glass Fiber Technology (LFT). Unlike conventional short glass fiber (SGF) reinforced PP, the long fibers in LFT-G® PP GF40 form an internal, interlocking skeletal network. This structure is key to delivering vastly superior impact resistance, creep endurance, and overall structural integrity, making it an ideal choice for high-performance, lightweight components.
Key Specifications of PP-GF40
Specifically engineered for heavy structural components, LFT-G® PP-LGF40 delivers optimized physical strength profiles, providing a dependable combination of high flexural modulus and dynamic impact durability.
LFT-G® PP GF40 Datasheet long fiber PP
Mechanical PropertiesProperty |
Typical Value |
Unit |
Test Standard |
|---|---|---|---|
| Tensile Strength | 140 - 150 | MPa | ISO 527-1/-2 |
| Tensile Modulus | 9000 - 9,400 | MPa | ISO 527-1/-2 |
| Elongation at Break | 1.5 - 2.5 | % | ISO 527-1/-2 |
| Flexural Strength | 185 - 189 | MPa | ISO 178 |
| Flexural Modulus | 6,800 - 7,300 | MPa | ISO 178 |
| Notched Izod Impact Strength (23°C) | 45 - 60 | kJ/m² |
ISO 180/1A
|
Other Properties
| Property | Typical Value | Unit | Test Standard |
|---|---|---|---|
|
Density
|
1.20 - 1.21 |
g/cm³
|
ISO 1183
|
|
Molding Shrinkage (Flow)
|
0.1 - 0.3 | % |
ISO 294-4 |
|
Deflection Temperature (1.8 MPa) |
155 - 160 | °C |
ISO 75-2/A
|
| Melting Temperature (DSC) | 159 -162 | °C | ISO 11357-3 |
Download Complete LFT-G PP LGF40 Data Sheet PDF
Core Advantages of PP LGF40
LFT-G® PP GF40 is engineered as a transformative material solution. The key to its superior performance lies in the 40% long glass fibers that form an interconnected, skeletal network within the polypropylene matrix. This structure is fundamentally better at dissipating energy and distributing stress compared to the random dispersion of short fibers. For your applications, this unlocks the following core advantages:
- Superior Impact Resistance & Toughness
- High Strength & Stiffness for Structural Applications
- Excellent Strength-to-Weight Ratio for Lightweighting
- Enhanced Creep & Fatigue Endurance under Load
- Outstanding Dimensional Stability & Low Warpage
- Improved Performance at Elevated Temperatures
What is PP glass filled used for?
The robust property profile of LFT-G® PP GF40 makes it a versatile problem-solver across numerous industries, bridging the gap between commodity plastics and higher-cost engineering polymers or metals.
Automotive Part
In the automotive world, where every gram and every performance metric counts, LFT-G® PP GF40 is a key enabler for innovation. It is specified for large structural components where high stiffness and impact strength are essential. Common applications include: front-end carriers, instrument panel structures, door modules, under-hood components like fan shrouds and battery trays for EVs, and robust tailgate inner structures. It effectively replaces metal to reduce vehicle weight and system costs, while providing the necessary strength for safety and long-term durability against automotive fluids and environmental stress.
Industrial Fan & Tool Part
For industrial machinery and tools, durability and reliability are paramount. LFT-G® PP GF40 is used for robust pump housings, valve bodies, conveyor system components, and heavy-duty power tool casings. Its excellent chemical resistance, high stiffness, and ability to withstand repeated impacts make it a more durable and often more cost-effective choice than die-cast aluminum or other thermoplastics, leading to longer service life and lower maintenance costs in demanding industrial environments.
Appliances & Sport Part
From washing machine components like drum supports and balance rings that require excellent resistance to water and chemicals, to frames for high-end office chairs and structural elements in sporting goods where high strength and fatigue resistance are needed, LFT-G® PP GF40 provides premium performance and long-lasting durability. Its ability to be molded into complex shapes allows for innovative designs that are both aesthetically pleasing and functionally robust, enhancing the overall consumer experience and product reliability.
PP LGF40 vs. Nylon (PA6/PA66)
While glass-reinforced nylons are strong, they absorb atmospheric moisture, resulting in dimensional swelling and a 50% drop in mechanical performance. LFT-G® PP LGF40 maintains an extremely low moisture absorption (≤0.03%), making it a stable structural alternative to materials like nylon (PA6/PA66) in structural applications. Under humid or wet environments, it retains its original stiffness and tensile profile, preventing product warping.
LFT-G®PP GF40 VS. Other Materials
Choosing the right material involves comparing trade-offs in performance and cost.
| Property |
LFT-G® PP LGF40 |
PP SGF40 | PA6-GF30 | Die-Cast Aluminum |
|---|---|---|---|---|
| Density (g/cm³) | 1.20- 1.22 | 1.15 - 1.20 | 1.35 - 1.38 | ~2.70 |
| Tensile Strength (MPa) | 140-158 | 80 - 100 | 160 - 180 | 240 - 300 |
| Impact Strength (Notched Izod, kJ/m²) | 45 - 60 | 10 - 18 | 25 - 35 | N/A (Ductile) |
| Moisture Absorption | Very Low | Very Low | High | N/A (Corrodes) |
| Relative Cost | $$ | $ | $$$ | $$$$ |
| Flexural Modulus (MPa) | 6,600 - 7,500 | 6,000 - 7,500 | 5,500 - 6,500 | ~69,000 |
- vs. PP SGF40 (Short Fiber): LFT-G® PP GF40 offers vastly superior impact strength (often 3-5x higher), better creep resistance, and higher stiffness, especially at elevated temperatures. It is the definitive choice for structural and semi-structural applications where durability is key.
- vs. PA6-GF30 (Nylon): While PA6-GF30 may offer higher ambient temperature stiffness, it is hygroscopic-it absorbs moisture, which significantly affects its mechanical properties and dimensional stability. LFT-G® PP GF40 is virtually unaffected by moisture, making it more reliable and predictable in humid or wet environments.
- vs. Die-Cast Aluminum: LFT-G® PP GF40 provides dramatic weight savings (often over 50%), greater design freedom for consolidating parts into complex geometries, inherent corrosion resistance, and frequently lower total system cost by eliminating secondary finishing operations.
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