LFT-G® PPA LGF30 | Polyphthalamide Long Glass Fiber Composite
High-Temperature Structural Grade | 30% Long Glass Fiber Reinforced Polyphthalamide
LFT-G® PPA LGF30 is a premium long glass fiber reinforced polyphthalamide (PPA) compound, engineered to deliver exceptional thermal performance, structural rigidity, and dimensional stability in high-temperature. In these high-load engineering applications, conventional engineering plastics fall short.
Featuring a continuous long-glass-fiber reinforcement system, this material delivers outstanding mechanical strength retention at elevated temperatures up to 280°C, ultra-low moisture absorption, and exceptional creep and fatigue resistance under sustained stress. The 3D long-fiber network forms an interconnected reinforcing architecture within the semi-aromatic PPA matrix, enabling efficient load transfer, minimal thermal warpage, and excellent dimensional precision across a wide service temperature range.
Core Performance Advantages
-
Superior High-Temperature Strength Retention
Maintains mechanical integrity at continuous service temperatures up to 150°C and peak exposures beyond 280°C (HDT @ 1.8 MPa), outperforming PA66 and ABS-based composites in under-hood automotive and high-power electronic applications.
-
Ultra-Low Moisture Absorption & Hydrolysis Resistance
With 24-hour water absorption below 0.25%, PPA LGF30 delivers stable dimensional and mechanical properties in humid environments-unlike conventional nylons, which can suffer up to 50% stiffness loss due to moisture uptake.
-
Exceptional Creep & Fatigue Endurance
The continuous long-fiber architecture provides outstanding resistance to permanent deformation under sustained loads and cyclic stress, ensuring long-term reliability in high-vibration and heavy-load environments.
-
Excellent Dimensional Stability & Low Warpage
The 3D long-fiber network minimizes molding shrinkage (0.20–0.30% flow direction) and thermal expansion, delivering precision tolerances critical for connector, sensor, and mating-part applications.
-
Broad Chemical & Fluid Resistance
Exhibits excellent resistance to automotive fluids, fuels, oils, coolants, and a wide range of industrial chemicals-even at elevated temperatures up to 150°C-making it ideal for engine-adjacent and fluid-handling components.
Performance Benchmark: Long Fiber vs. Short Fiber PPA
30% Glass Reinforced PPA: Long Fiber vs. Short Fiber Comparison
This comparison contrasts LFT‑G® PPA LGF30 (30% long glass‑fiber reinforced polyphthalamide) with standard short‑glass PPA GF30. LFT‑G® PPA LGF30 outperforms short‑fiber PPA across six key metrics: high‑temperature strength retention, impact toughness, creep resistance, fatigue durability, dimensional stability, and moisture resistance.
Its interconnected 3D long‑fiber reinforcement network enables better stress transfer, higher impact energy absorption, and far‑lower permanent deformation under sustained high‑temperature loads. Superior high‑temperature mechanical performance makes it an ideal metal‑replacement material for automotive under‑hood parts, high‑power connectors, pump housings and heavy‑duty structural components, with no loss of processability.
LFT-G® PPA LGF30 Injection Molding Guidelines
| Parameter | Recommended Range | Key Notes for LFT-G® PPA LGF30 |
|---|---|---|
| Drying Temperature ① | 120 – 130 °C | Use a desiccant dryer to ensure moisture < 0.15% for optimal mechanicals |
| Drying Time ① | 4 – 6 hours | Thorough drying critical to prevent hydrolysis-induced property loss |
| Melt Temperature (Nozzle) ③ | 315 – 335 °C | Maintain tight temperature control; avoid residence time > 8 min |
| Mold Temperature ② | 90 – 120 °C | Higher mold temperature improves surface finish and crystallinity |
| Injection Speed | Moderate to Fast | Balance fill speed and fiber integrity; optimize for thin-wall sections |
Critical Processing Tips：
Screw: Low-compression, high-wear-resistant screw design to minimize fiber attrition and shear degradation
Gating: Large-diameter, generously sized gates to reduce fiber breakage and pressure loss at entry points
Regrind: Maximum 20% regrind content; use only high-quality regrind and verify part properties
Typical High-Performance Applications
Automotive Under‑Hood & Powertrain Systems
Ideal for engine covers, thermostat housings, oil pan components, transmission system parts, bearing cages, and fuel system connectors. Delivers reliable high-temperature performance up to 150°C continuous service, with excellent resistance to oils, coolants, and automotive fluids-enabling lightweight metal replacement without compromising durability in harsh engine-adjacent environments.
Electrical & Electronic Components
Widely used in high-density connectors, chip carriers, sockets, sensor housings, motor components, circuit breakers, and low-voltage switchgear. The combination of excellent electrical insulation properties, high-temperature stability, and precision dimensional control makes PPA LGF30 the material of choice for next-generation electronic packaging and power distribution systems.
Industrial Pumps, Valves & Fluid Handling
Perfect for pump bodies, valve components, compressor parts, seals, bearing cages, and reciprocating compressor components. Offers outstanding chemical resistance to hydrocarbons, chlorinated solvents, esters, ketones, alcohols, and most aqueous solutions, combined with excellent creep and fatigue resistance for long-term reliability in continuous-duty industrial equipment.
Consumer, Sports & Industrial Structural Parts
Suitable for bicycle components, sporting goods structural fittings, power tool housings, and general industrial machinery parts requiring high strength-to-weight ratio and thermal stability. The material's outstanding fatigue resistance and long-term creep performance ensure structural integrity under repeated stress and sustained static loads across a wide temperature range.
Frequently Asked Questions
Q: How does PPA LGF30 compare to PA66 GF30 in humid environments?
A: PPA LGF30 absorbs less than 0.25% moisture after 24 hours, compared to 1–2% for PA66. This ultra‑low moisture uptake ensures stable dimensional and mechanical properties in humid or wet environments, whereas PA66 can lose up to 50% of stiffness due to moisture absorption. PPA LGF30 also exhibits superior hydrolysis resistance for long‑term reliability in coolant and fluid‑contact applications.
Q: Does LFT-G® PPA LGF30 require special injection molding equipment?
A: Standard injection molding machines with high‑temperature barrel capability (up to 335°C) are suitable. For optimal fiber retention and surface quality, we recommend a low‑compression, wear‑resistant screw and generously sized gating to minimize fiber attrition. Mold temperatures of 90–120°C are recommended to achieve optimal crystallinity and surface finish. No special mold coatings are required.
Q: Is PPA LGF30 suitable for outdoor or UV‑exposed applications?
A: Yes. Long glass fiber reinforced PPA exhibits excellent weatherability and UV resistance, maintaining mechanical performance even under high UV radiation, high humidity, and extreme temperature conditions. For extended outdoor deployment, UV‑stabilized formulations can be provided upon request.
Hot Tags: ppa lgf30 high rigidity for demanding automotive, China, manufacturers, suppliers, factory, buy, customized
