In the high-performance engineering plastics segment, the demand for Long Glass Fiber Reinforced Polybutylene Terephthalate (LFT-PBT) has scaled rapidly. OEM engineers are shifting away from traditional short glass fiber formulations (SFT) and metals. The structural advantage of LFT lies in its skeletal, three-dimensional fiber network formed within the molded parts. This creates an interconnected reinforcement grid that disperses mechanical load efficiently across the structural geometry.
As sustainability mandates drive automotive electrification and light-weighting globally, material specifications are becoming ever more stringent. Modern EV components require structural materials capable of handling persistent mechanical vibration, high thermal currents, and intensive exposure to chemicals without degrading. LFT-PBT answers this challenge with exceptional fatigue strength, high heat deflection temperatures (HDT), and unmatched dimensional stability over long-term operations.
Global procurement metrics show a significant rise in LFT-PBT sourcing within the automotive powertrain, ADAS sensing systems, and heavy industrial domains. Engineering groups prioritize vendors offering full CE Certification to guarantee cross-border supply chain compliance.
Unlike short fibers, which act as stress concentrators during impact events, the continuous long fiber filaments within PBT absorb dynamic shocks, providing up to three times the impact strength while preserving high modulus parameters.
Due to low isotropic shrinkage and reduced moisture absorption characteristics, structural components built from our LFT-PBT display minimal distortion, greatly increasing operational reliability under hot and humid environments.
Jurong Best Composite Materials Co., Ltd. is strategically located in the ancient town of Maoshan, which boasts a rich historical heritage dating back over a thousand years. Situated in Jurong City, Zhenjiang, Jiangsu Province, our production ecosystem sits along the lower reaches of the Yangtze River.
Our geographic location borders Nanjing, providing immediate proximity to Nanjing Lukou International Airport. Logistics and global exports are accelerated via the Jianning-Taicang Expressway (connecting Nanjing to Taicang) passing directly through the region, alongside the Jurong exit of the Shanghai-Nanjing Expressway. This robust network ensures direct connections to Zhenjiang Port and Nanjing Port. Benefiting from the infrastructure of the Yangtze River Delta Economic Zone, our supply chain guarantees quick transit and highly efficient domestic and international freight operations.
Our advanced production lines specialize in the development and compounding of LONG GFRP (GLASS-FIBER-REINFORCED-POLYMER) GRANULES. These high-end engineered materials are utilized across diverse industries to manufacture safety-critical car parts, robust washing machine components, high-stress small kitchen electrical appliances, and complex industrial gears.
State-of-the-Art Pultrusion and Compounding Facilities at Jurong Best
International engineering clients recently conducted detailed, professional audits of our PA6 and PA66 long GFRP (Glass-Fiber-Reinforced-Polymer) granules. The extensive evaluation confirmed our strict adherence to quality control procedures and our high consistency standards, resulting in zero-defect approval.
Our factory has commissioned a new, high-capacity pultrusion line. This automated system increases our annual capacity, ensuring we can meet the rising demand for specialty long fiber materials while maintaining tight tolerance control over fiber length and loading distributions.
Polybutylene Terephthalate (PBT) is recognized for its high electrical resistance, low moisture absorption, and robust solvent resistance. However, when reinforced with Long Glass Fibers (typically 10mm to 12mm in length), the mechanical envelope changes significantly. During our specialized pultrusion manufacturing process, glass filaments are fully impregnated with the PBT matrix, keeping the glass fibers aligned parallel along the entire length of the pellet.
This structural alignment guarantees that when injection molded, the long fibers form an internal skeletal network. This skeleton shields the components from structural creep under high load and elevated temperatures, outperforming standard short-fiber-reinforced PBT (where fibers are typically less than 1mm in length).
| Property Designation | Standard PBT Unreinforced | Short Glass Fiber PBT (30% SFT) | Long Glass Fiber PBT (30% LFT) | Engineering Efficacy Benefit |
|---|---|---|---|---|
| Tensile Strength (MPa) | 50 - 60 | 120 - 135 | 165 - 180 | Superior load-bearing capability under static load conditions |
| Flexural Modulus (GPa) | 2.5 | 7.5 | 9.8 - 11.0 | Excellent rigidity prevents flexing under constant high pressure |
| Notched Impact Strength (kJ/m²) | 4.5 | 8.5 | 22.0 - 25.0 | High energy absorption capacity limits catastrophic structural failures |
| Heat Deflection Temp (HDT @ 1.8 MPa) | 60 °C | 190 °C | 215 °C | Maintains dimensional stability during high thermal spikes |
| Isotropic Shrinkage (Parallel/Normal) | 1.5% / 1.5% | 0.3% / 1.1% | 0.15% / 0.45% | Extremely low warpage, enabling production of precise tolerances |
Note: The performance data listed above represents average values obtained through ISO-certified test procedures. Actual part properties will depend on the geometric structure and molding parameters of the injected components.
Our facility at Jurong Best utilizes modern Factory 4.0 integration, combining automated raw material feeding, advanced real-time gravimetric dosing systems, and state-of-the-art pultrusion compounding lines. This setup helps minimize batch-to-batch variations by automatically monitoring melt temperatures, pulling speeds, and fiber wet-out parameters.
Each batch undergoes strict testing to verify fiber content, pellet length distribution, and mechanical performance. By leveraging digital manufacturing controls, we maintain highly consistent material properties across large production volumes, giving global Tier-1 automotive and electronic OEMs consistent reliability.
Furthermore, our localized supply chains for raw PBT resin, glass fiber rovings, and specialized coupling agents protect our production schedules from unexpected global trade shifts, ensuring consistent product availability even during peak market demands.
Located in the Yangtze River Delta Economic Zone, our plant offers clear logistics advantages:
The combination of structural strength, low moisture absorption, and thermal performance makes LFT-PBT highly effective for complex, demanding engineering applications. From critical automotive components to high-stress industrial parts, this material is engineered to replace heavier metal assemblies and lower-grade polymers.
Ideal for structural parts like windshield wiper arms, door handle brackets, sensor housings, and EV battery module components. Its low-creep properties keep mounting points tight under persistent road vibration.
Perfect for connectors, solenoid valve housings, micro-switches, and circuit breaker components. The compound's electrical insulation properties and dimensional stability prevent terminal misalignment.
Commonly used in water pump impellers, valve bodies, washing machine brackets, and chemical process equipment. The chemical resistance of LFT-PBT prevents swelling and maintains structural integrity.
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