TPU-Lubrizol Estane 58211
Achieving high elastic recovery and reliable flame retardancy without corrosive halogens in heavy-duty industrial seals and dynamic cable jackets requires a highly stabilized polyether matrix, which Lubrizol’s ESTANE® 58211 (ZHF 58211) delivers. Featuring a density of 1.29 g/cm³ and a hardness of 91A Shore A, this non-halogenated flame-retardant (NHFR) TPU provides exceptional tear strength (84 kN/m) and robust low-temperature flexibility. Jucheng Precision, under ISO 9001 and IATF 16949 quality frameworks, specializes in precision injection molding of Estane 58211. Utilizing 5-axis CNC-machined tooling, we optimize gating and manage its high shrinkage (1.0%-2.0%) to prevent sink marks on heavy structural ribs, verified by Zeiss CMM.
Estane 58211 Non-Halogen Flammability & Toughness Profile
ESTANE® ZHF 58211 is a non-halogen, flame-retardant, aromatic polyether-based thermoplastic polyurethane (TPU) engineered by Lubrizol, designed to deliver exceptional tear strength, thermal stability, and low smoke toxicity:
| Physical & Safety Property | SABIC Ultem 1000 Value | Molding & End-Use Advantage |
|---|---|---|
| Eco Flame Retardant | Halogen-Free (NHFR) Formulation | Achieves flame retardancy without halogens, preventing toxic smoke and acid gas outgassing, ensuring high safety in transport systems. |
| Tear & Wear Strength | Graves Tear Strength 84 kN/m | Provides outstanding tear and abrasion resistance (Taber loss 2mg), preventing crack propagation in dynamic protective bellows. |
| Subzero Flexibility | Glass Transition Temperature -38°C | Maintains exceptional polymer matrix toughness and elastic flexibility in deep-freeze environments, avoiding brittle failure. |
Structural Component Process Configurations for Flame-Retardant Estane 58211
With its high-flow melt performance and low mold shrinkage, Estane 58211 processes consistently inside precise cavities:
| Molding Technology Class | Process Compatibility & Operational Details |
|---|---|
| Heavy-Duty Cable Reliefs | Excellent. Configured with hot-runner gating to mold lightweight cable strain-relief boots, dynamic bellows, and industrial protective sleeves. |
| Flame-Retardant Industrial Seals | Excellent. Outstanding dimensional stability, low outgassing, and high chemical resistance prevent structural distortion. |
| Multi-pin Connector Overmolding | Good. Highly compatible with other engineering resins to provide localized flexible seals and dynamic gas-tight protection barriers. |
TPU-Lubrizol Estane 58211 Tooling & Processing Guide
Molding an amorphous high-performance elastomer like Estane 58211 requires strict thermal boundaries and low-stress mold setups to prevent flashing:
Micron-Level Flash Control (Tooling Precision)
Because Estane 58211 has exceptional flow capabilities, the molten resin can seep easily into minor mold gaps, causing parting line flash. Jucheng’s tooling division uses 5-axis CNC machines to achieve micro-tolerances, keeping mold parting clearances strictly within 0.005mm on premium S136 stainless steel mold cavity blocks.
Mold Temperature Matrix (Crystallization)
We maintain mold temperatures at 20°C–40°C (68°F to 104°F) using pressurized water chillers. Keeping tools cold is critical to freeze the soft elastomeric phase quickly, allowing for automatic, warp-free ejection. Melt temperatures are controlled at 190°C–210°C.
Desiccant Drying Protocol (Hydrolysis Prevention)
TPU is highly hygroscopic. Moisture causes hydrolytic polymer chain cleavage, making surgical parts brittle. We dry raw material in desiccant hopper dryers at 100°C–110°C (212°F to 230°F) for 3–4 hours, keeping moisture below 0.02% before molding, protecting dynamic mechanical tensile bonds.
High Elastic Shrinkage Compensation
Like standard TPU, Estane 58211 exhibits high shrinkage (typically 1.0% to 2.0% depending on hardness and grade). Our tooling division scales mold cavities precisely to compensate for this shrinkage, ensuring exact dimensional results verified by Zeiss CMM.
Key Application Fields for TPU-Lubrizol Estane 58211
- Industrial Infrastructure & Machinery: Heavy-duty high-pressure industrial oil seals, chemical-resistant gaskets, dynamic expansion plugs, and protective cable boots.
- EV Charging & Automotive (IATF 16949): Custom automotive charging gun cables, high-voltage sensor covers, electrical fuse housings, and vehicle bellows.
- Consumer Electronics & Wearables: High-safety Wi-Fi router enclosures, adapter housings, power tool housings, and set-top boxes.
Properties
| Density | 1.25 - 1.29 g/cm³ |
| Hardness (Shore A, 5s) | 91 - |
| Tensile Strength | 27.9 MPa |
| Tensile Elongation at Break (DAM) | 340 - 470 % |
| Tensile Stress at 100% Elongation | 8.6 MPa |
| Tensile Stress at 300% Elongation | 14.8 MPa |
| Tear Strength (Graves, Die C) | 84 kN/m |
| Taber Abrasion Loss (H18, 1000g) | 2 mg |
| Glass Transition Temperature (Tg) | -38.0 °C |
| Vicat Softening Temperature | 98 °C |
| Linear Mold Shrinkage | 1.0 - 2.0 % |
| Dielectric Strength | 18 - 25 kV/mm |
| Volume Resistivity | 1.0E+12 Ohm-cm |
| Maximum Part Size | 800 x 600 mm |
| Minimum Part Size | 1 x 1 mm |