What is Nylon PA66 GF35 Resin?
Nylon PA66 GF35 traditionally refers to a polyamide 66 resin reinforced with 35% short glass fibers, favored for high-temperature applications. However, to combat the brittleness of short fibers, LFT-G® provides a superior PA66 LGF35 (Long Glass Fiber) upgrade. By infusing the highly crystalline PA66 matrix with 35% continuous long glass fibers through advanced pultrusion, the molded parts develop an internal entangled 3D skeletal network. This structural revolution pushes the tensile modulus to an immense 11,000 MPa and the heat deflection temperature (HDT) past 255°C, offering the ultimate thermoplastic solution for replacing die-cast aluminum in heavy-duty engines.
Typical Material Properties (LFT-G® PA66 LGF35)
The extreme mechanical and thermal values detailed below represent standard metrics recorded inside the LFT-G® Testing Laboratory under Dry-As-Molded (DAM) conditions.
| Property | Test Standard | Value (DAM State) |
|---|---|---|
| Density / Specific Gravity | ISO 1183 | 1.39 ± 0.02 g/cm³ |
| Tensile Modulus | ISO 527 | 11,000 MPa |
| Tensile Strength | ISO 527 | 190 MPa |
| Flexural Modulus | ISO 178 | 9,000 MPa |
| Flexural Strength | ISO 178 | 290 MPa |
| Property | Test Standard | Value |
|---|---|---|
| Charpy Notched Impact (23°C) | ISO 179 | 28-32 kJ/m² |
| HDT (0.45 MPa) | ISO 75 | 259 °C |
| HDT (1.80 MPa) | ISO 75 | 255 °C |
| Mold Shrinkage | ISO 294-4 | 0.20 - 0.35 % |
| Flame Rating | UL 94 | HB (V0 Optional) |
Extreme High-Heat Applications & Metal Replacement
Automotive Under-the-Hood Components
Engine covers, intake manifolds, radiator end tanks, and thermostat housings face punishing thermal cycling and high internal burst pressures. The highly crystalline PA66 matrix combined with the 35% long glass fiber skeleton maintains structural rigidity flawlessly at continuous operating temperatures exceeding 200°C. It is the premier choice for automotive OEMs looking to shave kilograms off the front axle by replacing die-cast aluminum without sacrificing thermal safety.
Heavy-Duty Industrial Gears & Housings
Industrial power tool housings, high-torque gears, and mechanical brackets require extreme impact resistance during accidental drops and continuous friction. By replacing standard PA66 GF35 with our LGF35 compound, these parts gain ductile failure performance-absorbing massive energy without shattering, ensuring user safety, excellent wear resistance, and long tool lifespan.
Processing Guidelines for PA66 High-Heat Resin
Nylon PA66 requires significantly higher processing temperatures than standard PA6 or PP materials. Achieving maximum mechanical performance from LFT-G® PA66 LGF35 requires stringent moisture control and optimized injection molding parameters to preserve the integrity of the long glass fiber 3D skeletal network.
Strict Pre-drying
100–110°C / 4–6h
Moisture < 0.10% (Crucial)
High-Temp Injection
Melt 280–300°C
Mold 80–110°C (Press. 80-120 MPa)
Tooling Settings
Low-compression screw
Generous fan or sprue gates
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