High-Heat & Low-Moisture Dimensional Stability
While standard PA66 GF40 uses short, chopped fibers that are prone to catastrophic failure under severe load, LFT-G® PA66 LGF40 NG04 utilizes a 40% continuous long glass fiber skeleton. This internal 3D network vastly multiplies the inherent heat resistance of the Polyamide 66 polymer. Furthermore, PA66 absorbs significantly less moisture than PA6, ensuring that critical molded components do not swell, warp, or lose their immense rigidity when exposed to humid climates or liquid coolants.
Material Identification
| Property Key | Specification Value |
|---|---|
| Product Grade Code | LFT-G® PA66 LGF40 NG04 |
| Polymer Matrix | Polyamide 66 (PA66 / Nylon 66) |
| Reinforcement | 40% Continuous Long Glass Fiber |
| Available Color | Black, Natural (Customizable) |
| Material Form | Injection Molding Pellets (10-12mm) |
Typical Properties of PA66 LGF40
| Property | Standard | Value |
|---|---|---|
| Density | ISO 1183 | 1.46 g/cm³ |
| Mold Shrinkage | ISO 294-4 | 0.1% - 0.3% |
| Tensile Strength | ISO 527 | 215 MPa |
| Tensile Modulus | ISO 527 | 13,588 MPa |
| Property | Standard | Value |
|---|---|---|
| Flexural Strength | ISO 178 | 321 MPa |
| Flexural Modulus | ISO 178 | 10,250 MPa |
| Notched Impact | ISO 179 | 35 kJ/m² |
| HDT (1.8 MPa) | ISO 75-2 | 254 °C |
Typical dry-as-molded values. PA66 LGF40 exhibits significantly lower equilibrium moisture absorption compared to PA6, resulting in vastly superior dimensional stability in humid conditions.
Processing Parameters
Drying
100°C / 4-6h
Moisture < 0.15%
Melt Temp
280–300°C
Higher than PA6 profile
Mold Temp
80–120°C
Ensures maximum crystallinity
Multi-Industry Metal Replacement Applications
Automotive Under-Hood Components
Components such as radiator brackets and engine water chambers operate in extreme heat and humidity. The PA66 LGF40 matrix easily survives ambient temperatures exceeding 200°C. Crucially, its remarkably low moisture absorption ensures that mounting holes do not swell and lose dimensional tolerance over years of harsh weather exposure. *(Illustrative weight-reduction estimate vs die-cast aluminum: 45%)*
Industrial High-Pressure Pump Housings
For fluid control valves and industrial pump casings constantly submerged or exposed to liquids, standard nylons absorb water and lose strength. The low moisture uptake of this specific PA66 formulation guarantees lifetime leak-proof sealing surfaces, while the 40% long glass skeleton contains massive internal hydraulic pressures that would shatter ordinary plastics.
High-Heat Electrical Equipment Housings
Heavy-duty circuit breakers and industrial electrical housings generate immense internal heat. With a Heat Deflection Temperature (HDT) of 250°C, PA66 LGF40 prevents structural sagging under thermal load. Additionally, its low water absorption protects the dielectric insulation properties from failing during outdoor rainstorms.
Related Structural Grades
PA6 LGF40
Switches the matrix to PA6 to provide superior kinetic impact toughness and NVH dampening, at the cost of high-heat resistance.
View PA6 Grade →PA66 LGF50
Increases glass fiber to 50% for the absolute maximum 17,000 MPa modulus. Ideal for replacing ultra-heavy steel chassis parts.
View PA66 LGF50 →
Request Technical Trial Sample 
Are you actively looking to replace heavy die-cast metals with a high-heat, low-moisture composite? Contact the LFT-G engineering team to discuss your automotive or industrial project and request a 25KG PA66 LGF40 technical trial sample.
Email Inquiry: Candyhu@lfrtplastic.com
WhatsApp Directly: +86 13950095707
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