Axson PX 5212 Vacuum Casting Material

Axson PX 5212 Vacuum Casting Material

Axson PX 5212 is a high-performance polyurethane casting resin formulated to simulate the optical and mechanical properties of thermoplastics, specifically PMMA (Polymethyl Methacrylate / Acrylic). Renowned for its exceptional transparency and UV stability, it is the industry standard for producing high-fidelity clear prototypes via Vacuum Casting. At JUCHENG, we utilize this material combined with our premium silicone tooling and expert post-polishing techniques to deliver parts that rival the clarity of glass or mass-produced injection molded lenses.

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Axson PX 5212

Características Básicas y Composición

Axson PX 5212 is a two-component polyurethane system designed for processing in vacuum casting machines.

PMMA Simulation: It is chemically engineered to mimic the rigidity, hardness, and refractive index of Acrylic (PMMA).
Resistencia UV: Unlike many standard clear resins that yellow over time, PX 5212 features advanced UV stabilizers, ensuring long-term optical clarity even with outdoor exposure.
Low Viscosity: Its fluid nature allows it to fill thin walls and replicate intricate mold textures perfectly without trapping air bubbles.

Acabado Superficial: It cures to a hard surface that is easy to sand and polish, facilitating a high-gloss, mirror-like finish.

Opciones de Color

Estado Natural: Crystal Clear / Water Clear (Transparent).
Custom Tinting: One of the key advantages at JUCHENG is our ability to tint PX 5212. By adding specific pigments during the mixing process, we can achieve:

Transparent Colors: Transparent Red (Tail lights), Transparent Blue, Amber, etc.
Smoked/Tinted: Smoked Grey or Black for "dead front" display panels.

Opaco: Although naturally clear, it can be painted or dyed to opaque colors if required for specific gloss effects.

Parámetros Técnicos Clave

1. Propiedades mecánicas (valores típicos después del postcurado):

Propiedad	Valor	Unidad	Estándar
Dureza	85 - 87	Shore D	ISO 868
Módulo de flexión	2,200 - 2,400	MPa	ISO 178
Resistencia a la tracción	70 - 75	MPa	ISO 527
Elongación a la Rotura	7 - 10	%	ISO 527
Temperatura de Transición Vítrea (Tg)	95 - 100	°C	TMA
Resistencia al Impacto (Charpy)	20 - 30	kJ/m²	ISO 179
Índice de refracción	~ 1.49	-	-
Contracción Lineal	< 0.4	%	-

2. PROCESAMIENTO

Proporción de Mezcla: Polyol 100 : Isocyanate 100 (by weight). Accurate weighing is critical for optical clarity.
Mixing Condition: Must be mixed under vacuum to remove all air bubbles.
Vida útil: Approx. 15-20 minutes at 25°C. This allows sufficient time for casting complex molds.
Tiempo de Desmoldeo: Typically 45 - 60 minutes at 70°C.
Curado: Requires post-curing in an oven to reach full physical properties and hardness.

3. PRECAUCIONES

Sensibilidad a la humedad: Like all polyurethanes, Isocyanates are sensitive to moisture. Containers must be tightly closed after use to prevent foaming or bubbles in the final part.
Safety: Operators typically wear gloves and safety glasses. Use in a ventilated area.
Vida útil del molde: PX 5212 is chemically aggressive towards silicone molds compared to standard ABS-like resins. We use special release agents to extend mold life.

4. ALMACENAMIENTO La vida útil es de 6 meses para la PARTE A (Isocianato) y 12 meses para la PARTE B (Poliol) en un lugar seco y en contenedores originales sin abrir a una temperatura entre 60° F/(15° C) y 77° F/(25° C). Cualquier contenedor abierto debe cerrarse herméticamente bajo una capa de nitrógeno seco.

Vida Útil: typically 6-12 months in original unopened containers.
Condiciones: Store in a dry place at a temperature between 15°C and 25°C. Avoid direct sunlight and moisture.

Escenarios y campos de aplicación

Axson PX 5212 is the material of choice for industries requiring visual validation and optical performance:

Iluminación Automotriz: Prototype headlamp lenses, tail light covers, interior ambient light guides, and turn signal indicators.
Electrónica de consumo: Transparent display windows, LED covers, cosmetic bottles, and clear aesthetic casings for mobile devices.
Fluidics & Medical: Transparent flow models, reservoirs, and manifolds for visual inspection of internal fluid dynamics.

Bienes de Lujo: High-end crystal-like trophies, perfume bottle prototypes, and artistic models requiring a glass-like aesthetic.

Compatibilidad con el proceso de fundición al vacío

Moldeo al vacío: Specifically designed for use in silicone rubber molds under vacuum conditions. JUCHENG’s vacuum chambers ensure complete degassing to prevent micro-bubbles.
Pulido: The material is hard enough to withstand aggressive wet sanding and buffing compounds, essential for restoring transparency after demolding.
Sobremoldeo: Can be used as a substrate for overmolding with soft rubber-like resins (though adhesion testing is recommended).

Ventajas vs. Limitaciones

Ventajas	Limitaciones
Optical Clarity: Achieves water-clear transparency comparable to molded PMMA.	Temperature: While good (Tg ~100°C), it is not as heat-resistant as Polycarbonate simulants (like PX 5210).
UV Stability: Excellent resistance to yellowing, suitable for optical parts.	Brittleness: Like real PMMA, it is relatively rigid and can be brittle under heavy impact compared to PP-like resins.
Polishability: Easy to achieve a high-gloss finish manually.	Processing Time: Requires careful vacuum control and longer curing times to ensure bubble-free results.
Detail Reproduction: Low viscosity captures fine mold details.	Cost: Premium optical resin is slightly more expensive than standard ABS-like resins.

Fabricantes y alternativas

Fabricante: Sika Axson (Sika Advanced Resins). A global leader in high-performance polyurethane systems.
Alternatives at JUCHENG:
If you need higher heat resistance: We recommend Axson PX 5210 (Simulates PC).
If you need higher impact strength: We recommend Axson PX 527 (Simulates PC, more durable).
If you need a Japanese alternative: We offer Hei-Cast T0387 (High transparent resin).

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