LFT-G® PA12 LGF30: The High-Performance Long Fiber Composite
Reliable in Extreme Media – PA12 LGF30
LFT-G® PA12 LGF30 is a 30% long glass fiber reinforced polyamide 12, engineered for demanding applications such as fuel systems, chemical processing equipment, pneumatic tubing, and high‑end sports mechanisms. It combines outstanding chemical resistance, exceptionally low moisture absorption, and superior long‑term fatigue strength. Supplied as ready‑to‑mold pellets with uniform resin distribution, this material ensures consistent processing and reliable batch‑to‑batch quality across complex, thin‑wall designs.
Unlike standard short‑fiber compounds, the continuous glass fiber network in PA12 LGF30 delivers a unique load‑bearing architecture that maintains stiffness and impact resistance even after prolonged exposure to oils, fuels, salts, and humidity. While conventional polyamides like PA6 or PA66 swell and lose mechanical properties in wet environments, PA12's inherently low water uptake preserves dimensional accuracy and creep resistance. This makes PA12 LGF30 a superior choice for parts that operate under fluctuating temperatures, aggressive media, or repeated mechanical stress – without requiring post‑molding moisture conditioning.
Primary Material Characteristics
Exceptional Chemical & Hydrolysis Resistance
Unlike PA6 or PA66, PA12's inherently low amide group density provides outstanding resistance to oils, fuels, hydraulic fluids, calcium chloride, and salt solutions. When reinforced with 30% long glass fibers, this material withstands aggressive media without swelling or mechanical degradation, making it the preferred choice for fuel system components, chemical processing equipment, and automotive fluid handling parts.
Superior Media CompatibilityLow Moisture Sensitivity for Precision Parts
Standard polyamides absorb 2–3% moisture, causing dimensional swelling and property loss. PA12 LGF30 exhibits less than 0.7% water absorption at saturation, preserving its stiffness, strength, and dimensional accuracy even in tropical or underwater service conditions. The long glass fiber network further stabilizes part geometry, ensuring repeatable assembly fits.
Stable Performance in Humid EnvironmentsOutstanding Fatigue Endurance
The continuous long glass fiber skeleton in PA12 LGF30 effectively arrests micro-crack propagation under cyclic loading. Combined with PA12's natural high fatigue limit, this material delivers exceptional performance in snap-fits, living hinges, oscillating arms, and vibration-damped mounts – outperforming both unfilled PA12 and short-fiber compounds in flexural fatigue tests.
Designed for Moving ComponentsSuperior Low-Temperature Impact Toughness
While glass-filled nylons typically become brittle below -20°C, PA12 LGF30 retains exceptional impact strength down to -40°C. The long glass fibers act as efficient crack arresters, bridging micro-cracks and absorbing energy across a large volume. This unique combination of PA12's low glass transition temperature (-70°C) and long-fiber reinforcement ensures reliable performance in cold climate applications.
Unbreakable in Arctic ConditionsExcellent Creep Resistance Under Sustained Load
The entangled long glass fiber network effectively immobilizes polymer chains under constant static stress, giving PA12 LGF30 outstanding resistance to creep deformation. Unlike unreinforced PA12 or short-fiber grades that gradually deform over time, this material maintains tight tolerances on threaded inserts, press-fit bearings, and clamped flanges for decades of service.
Long-Term Dimensional IntegritySmooth Surface & Low Friction
Conventional short glass fiber compounds often exhibit surface fiber bloom, leading to high friction and abrasive wear. The resin-rich surface of PA12 LGF30, combined with long fiber orientation control, produces a smooth, low-friction finish. This reduces sliding resistance against mating metal or plastic parts, extending component life in bushings, guide rails, and gear housings.
Ready-to-Use Aesthetic & Wear Performance
Comparative Performance: LGF vs. SGF
LFT-G® PA12 LGF30 vs. PA12 GF30 (Short Glass Fiber)
Performance comparison based on typical injection-molding data. LFT-G® PA12 LGF30 delivers significantly higher mechanical properties.
Compared to standard short-glass reinforced PA12, the continuous long glass fiber network in PA12 LGF30 delivers superior impact toughness, enhanced creep resistance, and long-term dimensional stability – all while retaining PA12's inherent chemical resistance and low moisture uptake. This makes it a reliable, high-performance choice for metal replacement and demanding applications such as fluid handling, pneumatic systems, and cold-climate components.
Major Application Sectors
Automotive Fuel System Components
Replacing metal and short-glass reinforced PA66 in fuel delivery modules, quick-connectors, and fuel lines, PA12 LGF30 delivers outstanding resistance to diesel, gasoline, and road salts while maintaining dimensional stability in humid engine bays. Its long glass fiber network provides exceptional creep resistance under constant clamping pressure, preventing leaks over the vehicle's lifetime. The material's low moisture absorption eliminates hydrolysis-related failures common with standard polyamides.
Pneumatic Tubing & Push-to-Connect Fittings
Engineered for industrial air brake systems and pneumatic automation lines, 30% long glass fiber reinforced PA12 outperforms conventional PA12 and PA6 grades in burst pressure and fatigue endurance. The continuous fiber reinforcement allows thinner walls without compromising mechanical integrity, reducing weight and material usage. Excellent surface finish ensures reliable sealing with O-rings and collets, while low moisture uptake prevents dimensional changes in humid production environments.
Cold-Climate Outdoor Equipment
From ski bindings and snowmobile suspension arms to refrigerated warehouse guide rails, PA12 LGF30 retains exceptional impact toughness down to -40°C – far surpassing standard glass-filled nylons that turn brittle in freezing conditions. The long glass fiber skeleton absorbs sudden shock loads without cracking, while PA12's inherent UV and road salt resistance extends service life in winter environments. Direct metal replacement cuts weight without sacrificing stiffness.
Industrial Chemical Processing Components
Designed for pump housings, valve bodies, and flow meters exposed to aggressive media, PA12 LGF30 withstands calcium chloride, zinc chloride, and various dilute acids that rapidly degrade PA6 or PA66. The long fiber network provides superior creep resistance under continuous pump pressure, maintaining tight tolerances on sealing surfaces. Unlike metal, it never corrodes; unlike short-fiber compounds, it resists surface cracking after thousands of pressure cycles.
FAQ
Q: How does PA12 LGF30 compare to standard PA12 GF30 in humid environments?
A: Unlike PA12 GF30, which absorbs significant moisture and loses stiffness and dimensional accuracy over time, PA12 LGF30 has inherently low water absorption (<0.7% at saturation). This means parts remain dimensionally stable and retain their mechanical properties even in high-humidity or outdoor conditions. For applications like pneumatic fittings or fuel system components, this translates to longer service life and fewer field failures.
Q: Can PA12 LGF30 be used as a direct metal replacement in structural applications?
A: Yes. With a tensile strength of 145 MPa and flexural modulus of 8.3 GPa, PA12 LGF30 matches or exceeds many die-cast aluminum and brass grades in stiffness and strength, while offering a 30–40% weight reduction.
Q: Is PA12 LGF30 easy to injection mold, and what about surface finish?
A: Absolutely. Supplied as ready-to-mold resin-rich pellets, PA12 LGF30 flows smoothly into complex mold geometries with minimal warpage, thanks to the continuous glass fiber network. It produces a smooth, low-friction surface finish that does not require secondary painting or coating.
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