Certified Property Specification • LFT-G® PA66-NA-LGF20
Published by Xiamen LFT Composite Plastic Co.,Ltd • Quality Inspection Division
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1. Physical & General Properties
| Property | Testing Method | Nominal Value | Unit |
|---|---|---|---|
| Reinforcement Content | Ash Content / TGA | 20 | wt% |
| Specific Gravity | ASTM D-792 | 1.28 | g/cm³ |
| Molding Shrinkage (1/8 in / 3.2 mm) | ASTM D-955 | 0.10 – 0.30 | % |
| Color Availability | Visual Inspection | Natural, Black | Visual Grade |
2. Mechanical Properties (ASTM Certified)
| Property | Testing Method | Nominal Value | Unit |
|---|---|---|---|
| Tensile Strength | ASTM D-638 | 137 | MPa |
| Tensile Modulus | ASTM D-638 | 9,311 | MPa |
| Tensile Elongation at Break | ASTM D-638 | 3.0 – 4.0 | % |
| Flexural Strength | ASTM D-790 | 212 | MPa |
| Flexural Modulus | ASTM D-790 | 5,517 | MPa |
| Notched Izod Impact Strength | ASTM D-256 | 214 | J/m |
| Unnotched Izod Impact Strength | ASTM D-4812 | 1,180 | J/m |
3. Thermal & Flammability Performance
| Property | Testing Method | Nominal Value | Unit |
|---|---|---|---|
| Deflection Temperature under Load (HDT @ 264 psi / 1.82 MPa) | ASTM D-648 | 245 | °C |
| Flammability Rating (1.5 mm thickness) | ASTM D-635 / UL-94 | HB | Class |
4. Injection Molding & Pre-Drying Parameters
| Process Parameter | Recommended Range | Unit |
|---|---|---|
| Pre-Drying Temperature (Desiccant Dryer) | 80 | °C |
| Pre-Drying Time | 4 | Hours |
| Target Moisture Content Prior to Injection | < 0.02 | % |
| Melt Temperature (Nozzle to Feed) | 250 – 300 | °C |
| Mold Surface Temperature | 50 – 110 | °C |
| Injection Pressure | 69 – 124 | MPa |
Engineering Guidance for Finite Element Analysis (FEA) & Tooling
1. Fiber Aspect Ratio Maintenance: Unlike short glass fiber pellets where fibers are fragmented during compounding, LFT-G® PA66 LGF20 pellets contain continuous 10-12 mm fibers. Molders should utilize low back-pressure (0.3 to 0.5 MPa), low screw RPM, and free-flow check rings to prevent excessive shear-induced fiber attrition in the injection barrel.
2. Isotropic Shrinkage Simulation: When programming mold cavity dimensions, an isotropic shrinkage range of 0.10% to 0.30% should be utilized. Gate locations should be engineered to allow the continuous fiber network to expand evenly throughout precision threaded sections.
3. Critical Moisture Limit: Polyamide 66 undergoes rapid hydrolytic degradation if injected with moisture exceeding 0.02%. Always employ a desiccant dryer with a dew point below -40°C.
Download Certified PDF Data Sheet
Obtain the full stamped and certified PDF technical property sheet for quality record-keeping and material vendor qualification.