High Temp Clear Vacuum Casting Parts

Axson PX 5210 is a specialized transparent polyurethane resin developed to simulate the high-performance characteristics of Polycarbonate (PC). While standard clear resins often soften at moderate temperatures, PX 5210 is engineered to maintain its structural rigidity and optical clarity even in high-temperature environments. At JUCHENG, we recommend this material for functional clear prototypes that must endure thermal stress, such as lighting components located near high-power LEDs or transparent enclosures for operating machinery.

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High Temp Clear Vacuum Casting Parts
Axson PX 5210 Vacuum Casting Material
Axson PX 5210 is a specialized transparent polyurethane resin developed to simulate the high-performance characteristics of Polycarbonate (PC). While standard clear resins often soften at moderate temperatures, PX 5210 is engineered to maintain its structural rigidity and optical clarity even in high-temperature environments. At JUCHENG, we recommend this material for functional clear prototypes that must endure thermal stress, such as lighting components located near high-power LEDs or transparent enclosures for operating machinery.
Axson PX 5210

Basic Characteristics & Composition

Axson PX 5210 allows designers to validate both the visual appeal and thermal performance of a transparent part simultaneously.
  • Polycarbonate Simulation: It effectively mimics the hardness, stiffness, and thermal resistance of PC, bridging the gap between aesthetic models and functional testing.
  • High Transparency: Although it has a slightly higher refractive index than PMMA-like resins, it achieves excellent optical clarity suitable for lenses and light guides.
  • Thermal Stability: It offers a significantly higher Glass Transition Temperature (Tg) compared to standard clear resins like PX 5212.
  • UV Resistance: It features good UV stability, ensuring parts do not yellow quickly under normal use conditions.

Color Options

  • Natural State: Clear / Transparent (slightly warmer tone than PX 5212).
  • Tinting: Can be tinted to achieve transparent colors (e.g., Transparent Amber, Blue, Red) for automotive lighting applications.
  • Finishing: JUCHENG offers different levels of polishing: from "technical clear" (translucent) to "optical clear" (fully polished).

Key Technical Parameters

1. Mechanical Properties (Typical values after post-curing):
Property Value Unit Standard
Hardness 85 - 88 Shore D ISO 868
Flexural Modulus 2,300 - 2,500 MPa ISO 178
Tensile Strength 70 - 75 MPa ISO 527
Elongation at Break 8 - 12 % ISO 527
Glass Transition Temp (Tg) 100 - 110 °C TMA
Refractive Index ~ 1.52 - -
Linear Shrinkage < 0.4 % -

2. PROCESSING 
  • Vacuum Requirement: Must be cast in a vacuum chamber to remove air bubbles, which is critical for clear parts.
  • Pot Life: Approx. 10-15 minutes. This allows sufficient time to fill complex molds with varying wall thicknesses.
  • Viscosity: Low mixed viscosity facilitates the filling of fine details without trapping air.
 
3. PRECAUTIONS 
  • Post-Curing: To achieve the maximum heat resistance (simulating PC), thermal post-curing in an oven is strictly required. Without this step, the material will not reach its full thermal potential.
  • Contamination: Optical parts are sensitive to dust and mold release agents. We use specialized cleaning processes to ensure clarity.

4. STORAGE
  • Conditions: Store liquid components in a dry place between 15°C and 25°C. Containers must be resealed immediately after use to prevent moisture absorption (which causes cloudiness).
 

Application Scenarios & Fields

Axson PX 5210 is indispensable for applications combining visibility with heat:
  • Automotive Lighting: Headlamp internal bezels, light guides near engine heat, fog lamp lenses.
  • Technical Enclosures: Transparent covers for electronics that generate heat during operation.
  • Fluid Handling: Sight glasses, flow meters, or reservoirs that handle warm fluids.
  • Medical Devices: Housings that may require mild heat sterilization or exposure to warm environments.

Vacuum Casting Process Compatibility

  • Silicone Tooling: Compatible with standard silicone molds. High-gloss polished masters are used to impart a glossy finish directly from the mold.
  • Machining: Cured parts are rigid and can be drilled or tapped for assembly.
  • Polishing: Requires wet sanding and buffing. Due to its hardness (simulating PC), polishing may take slightly longer than softer acrylic-like resins but results in a durable finish.

Advantages vs. Limitations

Advantages Limitations
Heat Resistance: Superior to PX 5212; ideal for functional thermal testing. Optical Clarity: While excellent, it is slightly less "crystal water clear" than PX 5212 (PMMA simulant).
PC Simulation: Matches the mechanical feel of Polycarbonate. Brittleness: Like clear PC, it can be notch-sensitive; sharp corners should be avoided.
Durability: Hard surface resists scratching better than softer resins. Cost: Specialized high-temp clear resin is a premium material.
UV Stable: Good resistance for a functional resin. Process: Strict post-curing schedule is mandatory for performance.

Manufacturers & Alternatives

  • Manufacturer: Sika Axson (Sika Advanced Resins).
  • Alternatives at JUCHENG:
If you need absolute maximum clarity (Optical Class A): We recommend Axson PX 5212 (PMMA-like).
If you need higher impact resistance: We recommend Axson PX 527 (High Impact PC-like).
If you need high heat but opacity is okay: We recommend Hei-Cast 8015.
Jucheng Precision Factory
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