PA-DuPont Zytel 70C30HS
To substitute structural aluminum and zinc castings in high-load dynamic mechanisms without adding weight, Celanese’s Zytel 70C30HS (formerly DuPont) offers an advanced 30% carbon fiber reinforced, heat-stabilized polyamide 66 (PA66-CF30) matrix. Featuring a low density of 1.28 g/cm³ and a melting point of 262°C, this high-performance grade provides an exceptional tensile modulus of 20,000 MPa alongside inherent electrostatic dissipation (ESD) and near-zero wear. Jucheng Precision, operating under IATF 16949 and ISO 9001 certified frameworks, specializes in molding Zytel 70C30HS. Supported by our 5-axis CNC-machined CPM tool cavities and pressurized mold temperature controllers, we control its anisotropic shrink variables (0.1%-0.4%) to deliver flat, structurally flawless components verified by Zeiss CMM.
Zytel 70C30HS Structural Mechanics & Electrical Conductivity
Zytel® 70C30HS is a 30% carbon fiber reinforced, heat-stabilized polyamide 66 (PA66-CF30) compound engineered by Celanese (formerly DuPont), certified to deliver unmatched mechanical stiffness and electrostatic dissipation (ESD) under ISO/ASTM standards:
| Engineering Parameter | Typical Value (DAM / ISO) | Metal-Substitution Advantage |
|---|---|---|
| Structural Stiffness | Tensile Modulus 20.0 GPa (20,000 MPa) | Delivers extraordinary, metal-matching modulus at an exceptionally low density (1.28 g/cm³), enabling massive weight-savings over structural metals. |
| Tensile Strength at Break | 225 MPa (ISO 527-1,2) | Provides immense structural load-bearing capacity, successfully substituting dynamic zinc, brass, and aluminum brackets. |
| Electrical Conductivity | Surface Resistivity 10^2 – 10^6 Ohm/sq | Inherently conductive, providing excellent electrostatic dissipation (ESD) and EMI shielding protection for sensitive electronic bobbins. |
Structural Component Process Configurations for Zytel 70C30HS
With its high mechanical stiffness and carbon fiber reinforcement, Zytel 70C30HS supports precise, unyielding structural molds:
| Molding Technology Class | Process Compatibility & Operational Details |
|---|---|
| Aerospace Structural Mounts | Excellent. The primary process for Zytel 70C30HS. Engineered for high-stiffness aircraft brackets, structural engine mounts, and avionic cable clamps. |
| High-Stiffness Robotic Grippers | Excellent. Low density combined with extreme specific modulus supports rapid, high-yield manufacturing of lightweight robotic arms. |
| Conductive ESD Enclosures | Good. Inherent carbon-fiber conductive matrix provides stable electrostatic dissipation (ESD) and EMI shielding for high-precision components. |
PA-DuPont Zytel 70C30HS Tooling & Carbon Fiber Processing Guide
Molding an ultra-high performance carbon-fiber reinforced polyamide like Zytel 70C30HS requires strict moisture control and optimized gating to prevent abrasive tool wear and warpage:
Powder Metallurgy Hardened Tool Steel
30% short carbon fibers act as an aggressive grinding agent under high injection pressures and melt viscosity. Jucheng’s tooling division prevents gate and cavity erosion by using premium CPM powder metallurgy tool steels or hardened H13/S136 steel (HRC 54–56) with PVD ceramic coatings.
Managing Anisotropic Shrinkage & Warpage
Zytel 70C30HS shrinks exceptionally low along the flow (typically 0.10%) but higher perpendicular to the flow (0.40%). We conduct detailed Moldflow analysis during DFM to locate gates, ensuring uniform fiber orientation to prevent structural warping.
Pressurized Oil Mold Temperature Control
We maintain mold temperatures at 80°C–120°C (176°F to 248°F) using pressurized water heaters. High mold temperatures maximize surface gloss, reduce weld lines, and prevent surface carbon-fibers from floating, ensuring a smooth and non-fibrous finish.
Desiccant Drying Protocol (Hydrolysis Prevention)
PA66 is highly sensitive to moisture at high melt temperatures. Wet molding results in rapid hydrolytic chain cleavage, causing severe splay, gas bubbles, and a major drop in impact strength. We desiccant dry Zytel 70C30HS resin at 80°C–100°C (176°F–212°F) for 4–6 hours, keeping moisture below 0.10% (ideally <0.08%).
Key Application Fields for PA-DuPont Zytel 70C30HS
- Aerospace Structural Fittings & Defense: Ultra-lightweight drone structural arms, aircraft bracket mounts, weapon casing brackets, dynamic slide guides, and optical sensor bezels.
- Precision Dynamic Industrial Machinery: Heavy-duty planetary gears, helical gear sets, self-lubricating sliding bushings, high-pressure pump impellers, and compressor seals.
- Medical Devices & Surgical Systems (ISO 13485): Radiolucent surgical targeting frames, non-magnetic laboratory cassettes, patient-specific orthopedic instruments, and surgical robot joints.
Properties
| Density | 1.28 g/cm³ |
| Melting Temperature | 262 °C |
| Tensile Modulus (DAM) | 20,000 MPa |
| Tensile Strength at Break (DAM) | 225 MPa |
| Tensile Elongation at Break (DAM) | 1.5 - 2.0 % |
| Flexural Strength (DAM) | 310 MPa |
| Flexural Modulus (DAM) | 18,500 MPa |
| Charpy Notched Impact Strength (23°C) | 8.5 kJ/m² |
| Water Absorption (Equilibrium, 50% RH) | 1.5 % |
| Heat Deflection Temperature (HDT @ 1.80 MPa, DAM) | 255 °C |
| Surface Resistivity | 1.0E+02 - 1.0E+06 Ohm/sq |
| Linear Mold Shrinkage (Flow Direction) | 0.1 % |
| Linear Mold Shrinkage (Cross Direction) | 0.4 % |
| Maximum Part Size | 1000 x 800 mm |
| Minimum Part Size | 1 x 1 mm |