The Ultimate High-Heat Metal Replacement Matrix
While standard unreinforced Polyamide 66 struggles with dimensional instability and structural sagging under severe thermal loads, the LFT-G® PA66 LGF50 BG05B composite fundamentally alters the physical limits of the polymer. By impregnating the PA66 matrix with a 50% continuous long glass fiber skeleton, we have created an internal 3D structural network that vastly multiplies both the rigidity and the inherent heat resistance of the base resin. This extremely high fiber loading restricts polymer chain movement, dropping molding shrinkage to a mere 0.1%~0.3%, ensuring that highly complex molded components retain absolute dimensional precision even when exposed to boiling coolants or aggressive engine bay climates.
Material Identification & Classifications
| Property Key | Specification Value |
|---|---|
| Product Grade Code | LFT-G® PA66 LGF50 BG05B |
| Polymer Matrix Type | Polyamide 66 (PA66 / Nylon 66) |
| Reinforcement Architecture | 50% Continuous Long Glass Fiber |
| Available Color Options | Black (BG05B), Natural (NG05) |
| Material Delivery Form | Injection Molding Pellets (10-12mm length) |
| Recommended Processing | Injection Molding, Compression Molding |
| Flame Retardant Rating | HB @ 1.5mm (UL-94 Standard) |
| Typical Application Target | Heavy-duty structural metal replacement |
Typical Properties of PA66 LGF50 BG05B
| Property | Standard | Value |
|---|---|---|
| Specific Gravity | ASTM D-792 | 1.56 g/cm³ |
| Molding Shrinkage | ASTM D-955 | 0.1% - 0.3% |
| Tensile Strength | ISO 527 | 233 MPa |
| Tensile Modulus | ISO 527 | 15,033 MPa |
| Property | Standard | Value |
|---|---|---|
| Flexural Strength | GB/T 9341 | 341 MPa |
| Flexural Modulus | GB/T 9341 | 12,036 MPa |
| Notched Charpy Impact | ISO 180 | 41 kJ/m² |
| HDT (1.8 MPa) | ISO 75-2 | 256 °C |
Typical dry-as-molded values based on limited laboratory test specimens. Data presented demonstrates the supreme balance of 15,033 MPa tensile modulus and 256°C heat deflection temperature.
Processing Parameters & Tooling Notes
Pre-Drying
85–110°C / 3-5 hrs
Moisture < 0.05%
Melt Temp
267–299°C
Avoid high shear RPM
Mold Temp
75–100°C
Ensures optimal surface finish
Heavy-Duty High-Tension Structural Applications
Automotive Heavy-Duty Engine Mounts
Engine brackets and transmission mounts must withstand hundreds of kilograms of dynamic load alongside radiant heat exceeding 200°C. The extreme 12,036 MPa flexural modulus of this 50% long glass fiber PA66 composite entirely replaces heavy die-cast metals, eliminating fatigue failure caused by constant engine vibrations. *(Illustrative weight-reduction estimate vs cast iron: 65%)*
High-Pressure Industrial Fluid Housings
Heavy industrial water pumps and commercial fluid metering valves suffer from immense internal hydraulic bursting pressures. By utilizing PA66 LGF50, manufacturers secure a continuous 3D fiberglass skeleton that prevents casing ruptures, while the exceptionally low 0.1% molding shrinkage guarantees absolute leak-proof sealing across mating flanges.
High-Tension Structural Brackets & Fasteners
Used as critical structural connectors in CNC machinery enclosures and heavy equipment frameworks. Standard thermoplastics suffer from creep deformation under constant tension. However, the immense tensile strength (233 MPa) and HDT (256°C) of this composite ensure that bolted joints and structural brackets remain permanently rigid over decades of heavy industrial usage.
Related PA66 LGF Series
PA66 LGF40
Reduces fiber loading to 40% to slightly increase material flowability during complex injection molding, sacrificing peak modulus.
View PA66 LGF40 →PA66 LGF50
The current ultimate rigidity grade (12,036 MPa Flexural Modulus) engineered for replacing heavy-duty die-cast metals.
PA66 LCF40 (Carbon)
Upgrades the reinforcement from glass to 40% carbon fiber to achieve aerospace-grade light-weighting and EMI shielding.
View Carbon Grade →
Request Technical Trial Sample 
Are you actively looking to replace heavy die-cast metals with a high-rigidity, low-shrinkage composite? Contact the LFT-G engineering team to discuss your automotive or industrial project and request a 25KG PA66 LGF50 technical trial sample.
Email Inquiry: Candyhu@lfrtplastic.com
WhatsApp Directly: +86 13950095707
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