ABS Hei-Cast PU8150 for Vacuum Casting Material

Hei-Cast PU8150 is a high-hardness, high-strength polyurethane casting material optimized for vacuum molding, offering fast curing, fine detail replication, and engineering-plastic-like performance—ideal for functional prototypes and low-volume production, though with limited heat resistance (

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ABS Hei-Cast PU8150 for Vacuum Casting Material
ABS Hei-Cast PU8150 for Vacuum Casting Material
Hei-Cast PU8150 is a high-hardness, high-strength polyurethane casting material optimized for vacuum molding, offering fast curing, fine detail replication, and engineering-plastic-like performance—ideal for functional prototypes and low-volume production, though with limited heat resistance (<120°C).
Hei-Cast PU8150

Basic Characteristics

  • Material Type: Polyurethane (PU) elastomer, a two-component rapid-cure system designed for vacuum casting (e.g., silicone mold replication).
  • Curing Method: Room-temperature or heat-assisted curing with low shrinkage for high-precision reproduction.
  • Thixotropy: Excellent flow properties for filling intricate mold details.

Color

  • Typically semi-transparent or light amber; post-cure tinting is possible (e.g., to mimic ABS, PC, or other engineering plastics).

Technical Performance Parameters

Property Typical Value/Range
Mixed Viscosity (25°C) 200–400 mPa·s
Cure Time (25°C) 4–6 hours (heat acceleration possible)
Hardness (Shore D) 80–85
Tensile Strength 40–50 MPa
Elongation at Break 10–20%
Flexural Strength 60–70 MPa
HDT (Heat Deflection Temp.) 80–100°C
Density 1.10–1.15 g/cm³

Material Composition

  • Part A (Resin): Hydroxyl-terminated polyether/polyester polyols, catalysts.
  • Part B (Hardener): Isocyanate prepolymer (e.g., MDI/TDI derivatives).
  • Additives: May include defoamers, leveling agents (varies by manufacturer).

Physical Properties Table

Property Test Standard Value
Impact Strength ASTM D256 15–20 kJ/m²
Volume Resistivity ASTM D257 10¹²–10¹³ Ω·cm
Dielectric Strength ASTM D149 15–20 kV/mm
Linear Shrinkage / <0.3%

Applications & Industries

  • Prototyping: Functional testing parts, assembly verification models.
  • Low-Volume Production: Replacement for injection-molded plastics (e.g., housings, gears, seals).
  • Industrial: Automotive interiors, electronics mounts, medical device handles.
  • Consumer Goods: Metal-like decorative parts, wear-resistant pads.

Vacuum Casting Process Compatibility

  • Compatibility: Excellent; low viscosity ensures flawless mold filling and easy demolding.
  • Recommended Parameters:
  • Vacuum: ≤0.1 bar (to avoid bubbles).
  • Pouring Temp.: 25–40°C.
  • Post-Cure: 60–80°C for 2–4 hours enhances properties.

Advantages & Limitations

Pros:
  • High mechanical strength (close to ABS/PC).
  • Fast turnaround for small batches (50–100 units).
  • Resistant to oils, weak acids/bases.
Cons:
  • Limited long-term heat resistance (<120°C).
  • Moderate UV stability (requires coating for outdoor use).

Manufacturers & Alternatives

  • Original Brand: Hei-Cast (Japan; verify full brand name).
  • Alternatives:
  • Axson PU788 (similar hardness/strength).
  • Smooth-On Task Series (e.g., Task 9, cost-effective).
  • Polytek FlexFoam-iT! (for flexible applications).

Additional Notes

  • Post-Processing: Machinable, paintable, and platable.
  • EHS: Heavy-metal-free but requires skin protection (isocyanate sensitivity).
For precise data, consult the manufacturer’s TDS (Technical Data Sheet) or conduct trial runs.
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