Key Specifications of LFT-G® PP-LGF30
Long glass fiber-reinforced polypropylene (LGFPP) is a high-performance thermoplastic composite material produced by embedding long glass fibers into a polypropylene matrix. LFT-G® PP-LGF30 (PP GF30 long fiber grade) is specifically engineered for structural components requiring optimized physical strength. While the fibers are long in the pellet (typically 5 to 25 mm), they retain sufficient length in the finished part to provide superior reinforcement. The long fibers form a three-dimensional internal skeleton during molding, significantly improving tensile strength, flexural modulus, creep resistance, and impact strength compared to standard short-fiber PP GF30.
[Learn more: Technical Principles of Long Glass Fiber Technology →]
Typical Material Properties (LFT-PP-LGF30)
The physical and mechanical values detailed below represent standard metrics recorded inside the LFT-G® Testing Laboratory under Dry-As-Molded (DAM) conditions per ISO standards.
| Property | Test Standard | Value (DAM State) |
|---|---|---|
|
Density / Specific Gravity |
ISO 1183 / ASTM D792 |
1.11 ± 0.02 g/cm³ |
| Tensile Modulus | ISO 527 | 6,800 MPa |
| Tensile Strength | ISO 527 | 113 MPa |
| Flexural Modulus | ISO 178 | 6,800 MPa |
| Flexural Strength | ISO 178 | 153 MPa |
| Property | Test Standard | Value |
|---|---|---|
| Charpy Notched Impact (23°C) | ISO 179 | 30-32 kJ/m² |
| HDT (1.80 MPa) | ISO 75 | 155 °C |
| Moisture Absorption | ISO 62 | ≤ 0.03 % |
| Mold Shrinkage | ISO 294-4 | 0.20 - 0.30 % |
| Flame Rating | UL 94 | HB / V0 Optional |
Multi-Industry Structural Applications & Replacement Value
Automotive Front-End Modules & Bumper Beams
Automotive front-end carrier modules, instrument panel structures, bumper impact beams, and radiator brackets require extreme load-bearing capability coupled with low dead weight. It serves as a strong, lightweight alternative to metal and more expensive engineering plastics, offering excellent performance at a lower cost for structural components. Specifying LFT-G® PP-LGF30 provides a 30% to 42% component weight reduction compared to stamped sheet steel or die-cast aluminum frames, while absorbing dynamic impact energy effectively during front collisions.
Appliance Washing Machine Drum Brackets
Inner drum support structures for high-spin washing machines, air conditioner brackets, and dishwasher bases require long-term fatigue endurance when submerged in hot detergent water. The hydrophobic polypropylene matrix limits moisture swelling (≤0.03%), preserving dynamic flexural strength during rapid spin cycles. Appliance original equipment manufacturers benefit from leak-free assemblies, zero rust risk, and reduced warranty claims.
Industrial Corrosion-Resistant Pumps & Fans
Corrosion-resistant chemical pumps, industrial fans, water filtration systems, and mechanical support frames operate under heavy fluid shear and corrosive chemical exposure. The low 1.11 g/cm³ specific gravity reduces rotational inertia on pump impellers and fan blades, improving motor energy efficiency while completely eliminating galvanic corrosion issues common in metal components.
Processing Guidelines & Customization Options
Achieving maximum mechanical performance from LFT-G® PP LGF30 requires optimized injection molding processing parameters that preserve the integrity of the long glass fiber 3D skeletal network. In addition to standard natural and black formulations, our compounding laboratory offers custom property modifications including Flame Retardant (UL94 V-0), Weathering Resistance (UV-stabilized), Heat Aging Stabilized, and Custom Color Matching.
| Processing Parameter | Recommended Setting |
| Pre-Drying Temperature / Time | 90–100 °C / 2–4 Hours (Moisture < 0.1%) |
| Melt Temperature Zone | 210–250 °C |
| Mold Temperature Zone | 38–69 °C |
| Injection Pressure Range | 80–120 MPa |
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