What is PP GF60?

LFT-G^® NG06 PP GF60 is an ultra-high-stiffness polypropylene (PP) composite, technically defined as a Long Glass Fiber Thermoplastic (LFT) reinforced with a 60% glass fiber content (LGF60). This material represents the pinnacle of performance within our polypropylene LFT portfolio, created for the most challenging applications where deflection under load is not an option. Through a specialized pultrusion process, we ensure that long, continuous glass fibers are perfectly aligned and bonded within the PP matrix. While commonly searched for as "PP GF60," it is the "LGF" (Long Glass Fiber) technology that enables this material to truly compete with and replace traditional metals.

LFT-G^® NG06 PP GF60 is an ultra-high-performance 60%Long Glass Fiber (LGF) reinforced polypropylene, engineered specifically for applications demanding metal-like rigidity. It provides:

Maximum Stiffness & Strength: Our highest modulus polypropylene composite, designed to replace die-cast aluminum and steel in structural components.
Exceptional Creep Resistance: Maintains dimensional integrity and load-bearing capability under constant, long-term stress, even at elevated temperatures.
Significant Lightweighting Potential: Delivers the performance of metal at a fraction of the weight, enabling greater efficiency and easier handling.

The dense, three-dimensional skeletal network formed by the 60% long glass fiber content during injection molding provides extraordinary rigidity and resistance to long-term creep. This structural integrity is maintained even under significant mechanical stress and thermal loads. The NG06 grade is the definitive choice for engineers seeking to push the boundaries of plastic composites, offering a lightweighting solution that does not compromise on strength or dimensional stability, making it the ultimate tool for cost-effective metal replacement in demanding industries like automotive and industrial machinery.

Technical Specifications & Performance Data

For critical structural applications, precise and reliable data is non-negotiable. The specifications below are typical, industry-referenced values for our LFT-G^® PP LGF60 (NG06) grade. This data confirms its status as a premier material for metal replacement. All tests are conducted on injection-molded specimens according to ISO standards.

Material Properties (Model: LFT-G^® NG06 PP GF60)

Property	Value	Unit	Test Method
Density	1.49	g/cm³	ISO 1183
Tensile Strength	155	MPa	ISO 527
Flexural Strength	225	MPa	ISO 178
Flexural Modulus	12,187	MPa	ISO 178
Notched Izod Impact Strength	47	kJ/m²	ISO 180
Heat Deflection Temperature (1.8 MPa)	162	°C	ISO 75
Coef. of Linear Thermal Expansion (Flow)	2.2 x 10⁻⁵	/°C	ISO 11359

Download Complete NG06 PP GF60 Data Sheet PDF

Performance Comparison: LFT-PP vs. Metals

Material	Density (g/cm³)	Flexural Modulus (GPa)	Specific Stiffness (Modulus/Density)
LFT-G^® PP LGF60	1.42	14.5	~10.2
Die-Cast Aluminum (A380)	2.70	71	~26.3
Stamped Steel (CR)	7.85	200	~25.5

Note: While metals offer higher absolute stiffness, the specific stiffness (stiffness per unit weight) of LFT-PP LGF60 becomes highly competitive, offering engineers a powerful lightweighting tool without significant performance trade-offs in many applications.

A large, structural automotive tailgate component molded from high-stiffness LFT-G PP GF60.

Image 2: Large structural parts, like this automotive tailgate inner panel, can be converted from metal to LFT-G^® PP LGF60 to save weight and consolidate parts.

Proven Applications & Case Studies

LFT-G^® PP LGF60 is not a standard plastic; it is an engineering composite designed for the most demanding structural challenges. It is the material of choice when replacing metal to reduce weight and cost is the primary objective, finding use in automotive body structures, industrial machine frames, and other applications where high stiffness is critical.

Case Study: Automotive Sunroof Frame Module

The Challenge: An automotive OEM wanted to integrate a large, panoramic sunroof into a new vehicle model without adding significant weight to the vehicle's roof, which would negatively affect its center of gravity and handling. The traditional steel frame was too heavy, and an aluminum frame was too costly.

The Solution: The engineering team specified LFT-G^® NG06 PP GF60 to create a one-piece, injection-molded frame. The 60% long glass fiber content provided the exceptional stiffness required to support the large glass panel and prevent any flexing or vibration, even when driving on rough roads. The material's low Coefficient of Linear Thermal Expansion (CLTE) also ensured that the frame would not expand or contract significantly with temperature changes, preventing leaks and stress on the glass.

Walier Insight: "The critical factor for this project was passing the roof crush safety test. This required extensive CAE (Computer-Aided Engineering) simulation. We provided our detailed material data cards to the client's simulation team. The high modulus and predictable creep behavior of our PP LGF60 allowed their models to accurately predict the frame's performance under extreme load, giving them the confidence to move from a heavy metal design to a lightweight composite solution without compromising safety."

The Result: The LFT composite frame was 50% lighter than the steel alternative and 20% less expensive than the aluminum design. It passed all safety and durability tests, allowing the OEM to offer a desirable feature to its customers while meeting strict weight and cost targets.

A heavy-duty industrial pump housing made from chemically resistant LFT-G LGF PP GF — Industrial pump housings made with LFT-PP LGF60 benefit from high stiffness and excellent chemical resistance.

Case Study: Industrial Conveyor System Support Frame

The Challenge: A manufacturer of automated warehouse systems needed to redesign the support frames for their conveyor belts. The existing welded steel frames were heavy, expensive to fabricate, and required painting to prevent corrosion in humid environments.

The Solution: The team opted for a modular design using injection-molded components made from LFT-G^® PP LGF60. The material's high stiffness ensured the long conveyor sections would not sag under the weight of transported goods. The polypropylene matrix made the parts inherently corrosion-proof, eliminating the need for painting.

"This application highlights the importance of creep resistance. The conveyor frame is under a constant state of stress for its entire life. A lesser material would slowly deform, or 'creep', causing the belt to misalign. Our PP LGF60's long fiber network creates a stable internal structure that effectively resists this long-term deformation, ensuring the system runs reliably for years. This level of long-term dimensional integrity is what allows it to confidently replace metal in such applications." Mayer Redel said, the structure engineer.

The Result: The new modular LFT composite design reduced the frame's weight by 60%, making installation significantly faster and easier. The total cost per unit was reduced by 30% due to the elimination of welding, grinding, and painting. The system also ran more quietly, as the composite material provided better vibration damping than steel.

Frequently Asked Questions (FAQ)

Q: What are the main processing challenges with a 60% glass-filled material?

A: The primary challenge with a high-fiber-content material like LFT-PP LGF60 is its higher viscosity. It requires a molding machine with sufficient injection pressure and clamp tonnage. Tooling must be robust, with larger runners and gates to facilitate melt flow and minimize shear on the fibers. Careful consideration of gate location through CAE mold-flow analysis is highly recommended to prevent weld lines in high-stress areas and to control fiber orientation for optimal performance.

Q: How does the warpage of LGF60 compare to lower-filled grades?

A: Due to its extremely high fiber content, LFT-PP LGF60 can exhibit more anisotropic behavior, meaning properties can differ between the flow and cross-flow directions. This can lead to a higher potential for warpage if not managed correctly. However, because the fibers also significantly lower the overall shrinkage, warpage can be effectively controlled through proper part design (e.g., uniform wall thickness, adding ribs for stability) and optimized processing conditions (e.g., balanced packing pressure, controlled cooling).

Q: Is this material suitable for parts that require threaded metal inserts?

A: Yes, it is an excellent candidate for applications using threaded inserts. Its high modulus and creep resistance provide a very stable and rigid substrate for both insert molding and post-mold heat-staking or ultrasonic installation. The material's strength ensures high pull-out force and torque resistance, creating a robust and reliable connection point for assembling other components.

Challenge Metal. Embrace a Lighter, Stronger Future.

When maximum stiffness and strength are non-negotiable, LFT-G^® PP LGF60 is the answer. Contact our engineering team to discuss your metal replacement project and discover how our advanced composites can provide a competitive edge.

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