LFT‑G® Glass Fiber Filled PA12 Nylon Composite Pellets
● What is PA12 LGF20 material?
LFT‑G® PA12 LGF20 is a 20% long‑glass‑fiber reinforced polyamide 12 compound that elevates the natural advantages of PA12 – extremely low moisture absorption, excellent chemical resistance, and high impact toughness – with the stiffness and creep resistance provided by continuous glass fibers. This balanced formulation delivers precision dimensional stability in humid environments and reliable mechanical performance over a wide temperature range, making it a preferred choice for fluid‑handling and precision mechanical components.
● Core Strength
💧Ultra‑low moisture uptake
Absorbs < 0.3% water – retains strength and dimensions in wet environments.
🧪Chemical & fuel resistance
Resists oils, greases, coolants, and industrial solvents without swelling or cracking.
📐Dimensional precision
Low, isotropic shrinkage ensures tight tolerances for snap‑fits and sealing surfaces.
🛡️Impact toughness
Notched impact strength > 30 kJ/m² – withstands shock and vibration in dynamic assemblies.
● Long Fiber vs. Short Fiber: Which Delivers Superior Performance in PA12?
With 20% long glass fiber reinforcement, LFT‑G® PA12 LGF20 consistently outperforms standard PA12 GF20 across all key mechanical indicators. The continuous fiber network enhances load transfer, impact absorption, and creep resistance, while preserving the inherent low‑moisture and chemical resistance of PA12 – making it the preferred choice for structurally demanding applications.
LFT‑G® PA12 LGF20 vs. PA12 GF20 – Normalized Performance Comparison
● Technical Data Sheet
LFT‑G® PA12 LGF20 Mechanical Properties Sheet
| Property | Value | Test Method |
|---|---|---|
| Specific Gravity | 1.18 g/cm³ | ASTM D‑792 |
| Molding Shrinkage (3.2 mm) | 0.2 – 0.4 % | ASTM D‑955 |
| Tensile Strength | ~ 120 MPa | ISO 527 |
| Tensile Modulus | ~ 9,200 MPa | ISO 527 |
| Flexural Strength | ~ 155 MPa | GB/T 9341 |
| Flexural Modulus | ~ 7,500 MPa | GB/T 9341 |
| Notched Izod Impact | 35 kJ/m² | ISO 180 |
| Notched Charpy Impact | 32 kJ/m² | ISO 179 |
● Processing Guidelines – Injection Molding
- Pre-drying
2–4 hrs @ 85–100°C
Moisture < 0.1% (dehumidifying dryer recommended).
- Melt & Mold
Melt 240–270°C • Mold 60–90°C
Use a low‑shear screw, large gates (≥5 mm).
- Injection & Purge
Pressure 70–130 MPa • Purge with PE/PP before shutdown.
Do not leave long‑fiber melt in barrel.
● Applications
Q: How does PA12 LGF20 compare to PA6 or PA66 in humid environments?
A: PA12 absorbs far less moisture (≈0.3% vs. 2–3% for PA6/PA66), so PA12 LGF20 maintains its mechanical properties and dimensional stability in wet conditions. This eliminates the need for moisture conditioning and prevents swelling‑related tolerance issues, making it ideal for outdoor, marine, and fluid‑contact applications.
Q: Can PA12 LGF20 replace brass or aluminum in precision fittings?
A: Yes. With high stiffness and excellent chemical resistance, PA12 LGF20 is a proven alternative to machined brass and aluminum for pneumatic fittings, sensor housings, and fluid connectors. It reduces weight by 60–70%, eliminates corrosion concerns, and allows complex geometries through injection molding – lowering total system cost.
Q: What are the key injection molding recommendations for PA12 LGF20?
A: Use a metering screw with 18:1–22:1 L/D ratio and a free‑flow check valve to minimize fiber breakage. Dry the pellets to <0.1% moisture to avoid hydrolysis. Melt temperature should be 240–270°C, mold temperature 60–90°C to ensure good surface finish and low warpage. Purge with HDPE or PP before shutting down the machine.
Contact: Emily
Email: sale04@lfrtplastic.com
WhatsApp / Mobile: +86 188 5034 4811
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