Precision Meets Thermal Resilience: The 20% Long Fiber Advantage
In precision engineering applications, heavily reinforced thermoplastics (such as 40% or 50% glass fiber) deliver extreme rigidity but frequently struggle with viscous mold filling, tool abrasion, and visible surface floating fibers. The LFT-G® 20% Long Glass Fiber Reinforced Polyamide 66 (PA66 LGF20) composite solves this engineering dilemma. By encapsulating 20% continuous long glass fibers within a premium Nylon 66 resin matrix, the molded component forms an internal continuous skeletal network that elevates tensile modulus to 9,311 MPa and flexural strength to 212 MPa. Simultaneously, the 20% fiber proportion preserves the natural fluidity of the virgin nylon matrix, enabling fast injection cycles, ultra-thin wall filling down to 0.8 mm, and an aesthetically pristine surface finish free from cosmetic blemishes. Backed by a 245°C heat deflection temperature and minimal isotropic shrinkage, it serves as the definitive structural upgrade for metal replacement where tight tolerances and surface beauty are non-negotiable.
Need the complete engineering test certification? Access our Official PA66 LGF20 Technical Data Sheet →
Material Identification & Classifications
| Property Key | Specification Value |
|---|---|
| Product Grade Code | LFT-G® PA66-NA-LGF20 |
| Base Polymer Matrix | Polyamide 66 (PA66 / Nylon 66) |
| Reinforcement Structure | 20% Continuous Long Glass Fiber (LGF) |
| Available Standard Colors | Natural and Black (Custom masterbatch available) |
| Pellet Physical Form | Pultruded Granules (10-12mm length) |
| Laboratory Test Standard | ASTM International Standard Protocols |
| Flammability Classification | HB @ 1.5mm (ASTM D-635 / UL-94) |
| Primary Industry Target | Automotive micro-connectors, Gas meters, Precision valves |
Typical Engineering Properties (ASTM Standards)
| Property | Standard | Value |
|---|---|---|
| Specific Gravity | ASTM D-792 | 1.28 g/cm³ |
| Molding Shrinkage | ASTM D-955 | 0.10% - 0.30% |
| Tensile Strength | ASTM D-638 | 137 MPa |
| Tensile Modulus | ASTM D-638 | 9,311 MPa |
| Property | Standard | Value |
|---|---|---|
| Flexural Strength | ASTM D-790 | 212 MPa |
| Flexural Modulus | ASTM D-790 | 5,517 MPa |
| Notched Izod Impact | ASTM D-256 | 214 J/m |
| HDT (1.82 MPa / 264 psi) | ASTM D-648 | 245 °C |
Properties were evaluated using standardized dry-as-molded test specimens according to ASTM criteria. Testing is strictly conducted under clean-room conditions to verify batch reproducibility.
Processing Parameters
Pre-Drying
80°C / 4 hrs
Moisture Content < 0.02%
Melt Temp
250–300°C
Injection Pressure: 69-124 MPa
Mold Temp
50–110°C
Optimized for thin-wall flow
Specialized Precision Applications for PA66 LGF20
Automotive High-Voltage Relay Housings & Micro-Connectors
Next-generation electric vehicle relay housings and multi-pin electrical connectors feature wall sections as thin as 0.75 mm. High fiber content composites (such as 40% or 50%) cause flow hesitation and short-shots, while unfilled nylon suffers from pin-spacing creep under lead-free solder reflow temperatures. PA66 LGF20 delivers supreme melt flowability to fill complex snap-fit geometries, while its 245°C HDT and low moisture absorption maintain critical micron-level contact tolerances.
Smart Gas Meter Housings & Flowmeter Bases
Precision utility gas meters and industrial flowmeters demand near-zero mold shrinkage (0.10% - 0.30%) and absolute creep resistance to prevent internal volumetric leakage over a 15-year service life. The continuous long fiber framework inside PA66 LGF20 eliminates anisotropic part warpage around precision internal thread connections, while producing a mirror-smooth inner surface that minimizes gas turbulence and measurement drift.
Commercial Espresso Brewing Groups & Steam Manifolds
Commercial coffee machines subject internal group heads and steam valve manifolds to continuous hydrothermal cycling with 95°C - 125°C pressurized water at 9 to 15 bar. Polyamide 6 softens and leaches in this environment, while brass components add unnecessary weight and accelerate limescale buildup. PA66 LGF20 maintains total rigidity and food-contact compliance under continuous hot-water immersion without hydrolytic cracking.
Explore the PA66 LGF Series
PA66 LGF20
The foundational high-flow grade. Maximizes cavity filling and surface cosmetics for precision thin-walled electrical and metering parts.
PA66 LGF30
Elevates stiffness to 11,063 MPa while reaching a 253°C HDT for automotive radiator tanks and high-pressure fluid housings.
View PA66 LGF30 →PA66 LGF40
Heavy structural reinforcement level for high-torque industrial motor brackets, heavy-duty gearboxes, and structural metal replacement.
View PA66 LGF40 →Request Technical Trial Sample 
Are you designing precision electrical micro-connectors, gas flowmeter housings, or hot fluid valves that require 245°C thermal stability alongside flawless thin-walled molding? Contact the LFT-G engineering team today to request a 25KG PA66 LGF20 trial sample.
Email Inquiry: Candyhu@lfrtplastic.com
WhatsApp Directly: +86 13950095707
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