Key Specifications of LFT-G® PP Granules
Xiamen LFT Composite Plastic Co., Ltd. is a manufacturer specializing in long glass fiber reinforced polypropylene (LGFPP/LFT-PP) granules. LFT-PP is a high-performance thermoplastic composite created by embedding long glass fibers into a polypropylene matrix. These granules offer improved impact resistance, stiffness, creep resistance, and reduced warpage compared to Short Fiber Thermoplastics (SFT). During injection molding, continuous 10–12 mm fibers form an internal 3D skeletal network that ensures robust mechanical load distribution.
Typical Material Properties (LFT-PP-LGF40 Granules)
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. Direct China manufacturer LFT-G® supplying LFT PP granules in bulk with a typical MOQ of 1 Ton.
| Property | Test Standard | Value (DAM State) |
|---|---|---|
|
Density / Specific Gravity |
ISO 1183 / ASTM D792 |
1.21 ± 0.02 g/cm³ |
| Tensile Modulus | ISO 527 | 9,200 MPa |
| Tensile Strength | ISO 527 | 138 MPa |
| Flexural Modulus | ISO 178 | 7,800 MPa |
| Flexural Strength | ISO 178 | 189 MPa |
| Property | Test Standard | Value |
|---|---|---|
| Charpy Notched Impact (23°C) | ISO 179 | 37-45 kJ/m² |
| HDT (1.80 MPa) | ISO 75 | 158 °C |
| Moisture Absorption | ISO 62 | ≤ 0.03 % |
| Mold Shrinkage | ISO 294-4 | 0.10 - 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. Specifying LFT-G® PP LGF granules provides a 30% to 42% component weight reduction compared to stamped sheet steel or die-cast aluminum frames. The continuous 3D glass fiber skeleton absorbs dynamic impact energy effectively during front collisions, ensuring structural safety while preventing squeak and rattle noise caused by thermal warpage.
Electric Vehicle (EV) Battery Container Frames
Electric vehicle battery enclosures demand exceptional flexural stiffness and isotropic mold shrinkage to maintain airtight sealing tolerances. LFT-G® LFT PP granules create an interlocking internal framework that resists creep under continuous static battery weight and thermal cycles. Electric mobility engineers eliminate galvanic corrosion risks while protecting high-voltage battery cells against mechanical intrusion and road debris impact.
Heavy-Duty Chemical Fluid Pumps & Impellers
Industrial fluid pumps, commercial washing machine outer tub supports, and water treatment valve bodies operate under severe hydraulic shear and hot detergent exposure. The hydrophobic polypropylene matrix exhibits zero moisture absorption (≤0.03%), outperforming short-fiber compounds. The high fiber alignment provides outstanding fatigue endurance under high-speed rotation, guaranteeing leak-free fits and continuous operational reliability.
Processing Guidelines & Factory Customization
Achieving maximum mechanical performance from LFT-G® LFT PP granules requires optimized injection molding processing parameters that preserve the integrity of the continuous long glass fibers. As a specialized manufacturer, our compounding laboratory offers custom granule 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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