Chi Mei Wonderlite PC – 122U Hot Sale PC Resin

Chi Mei Wonderlite PC-122U is a high-flow, UV-stabilized polycarbonate (PC) grade manufactured by Chi Mei Corporation.

Physical Properties

Density: As per ISO 1183, the material’s density is 1.20 g/cc (0.0434 lb/in³), characteristic of dense, rigid thermoplastics for structural use.
Melt Flow: Tested at 1.20 kg load and 300 °C with the Melt Volume Rate (ml/10 min) method in ISO 1133, the melt flow rate is 22 g/10 min, facilitating efficient injection molding.

Polymer Properties:

Base Material: Polycarbonate (PC)
Key Material Properties
- High Flow: With a melt flow rate of 22.0 g/10 min, PC-122U is ideal for intricate and thin-walled designs.
- UV Stabilization: Suitable for outdoor applications due to its resistance to weathering and UV degradation.
- Impact Resistance: Ultra-high impact strength ensures durability in demanding environments.
- Transparency: Excellent clarity makes it suitable for optical and aesthetic applications.
- Heat Resistance: Deflection temperature ranges from 127°C to 142°C, supporting use in high-temperature environments.
- Dimensional Stability: Low molding shrinkage ensures precise and consistent part production.
- Flame Rating: Complies with UL standards, enhancing safety in electrical applications.

Applications:

Outdoor Applications
- Traffic Signs and Lighting Covers:
  - Design Considerations:
    - PC-122U’s UV stabilization ensures long-term durability under prolonged sun exposure, maintaining clarity and structural integrity.
    - Its high impact resistance withstands environmental stresses like hail or vandalism. Designers should ensure proper thickness (typically 2–4 mm) to balance strength and weight.
  - Applications: Road signs, pedestrian signals, and streetlight covers benefit from PC-122U’s transparency and weather resistance.
- Outdoor Enclosures:
  - Design Considerations: The material’s dimensional stability supports the design of weatherproof enclosures for electrical or telecommunications equipment. Incorporate ribbing or reinforcement to enhance rigidity for larger panels.
  - Applications: Housings for outdoor cameras, Wi-Fi routers, or solar panel components.
Electrical and Electronic Products
- Device Housings:
  - Design Considerations:
    - The high flow rate allows for thin-walled designs (down to 0.8 mm) in complex geometries, reducing material costs. Ensure proper venting in molds to prevent surface defects.
    - The material’s flame resistance (UL-rated) enhances safety.
  - Applications: Smartphone cases, laptop shells, and smart home device enclosures.
- Connectors and Insulators:
  - Design Considerations: PC-122U’s electrical properties, including high dielectric strength, make it suitable for insulating components. Design for snap-fit features to leverage its toughness and flexibility.
  - Applications: Electrical connectors, switchgear components, and circuit breaker housings.
Optical Media and Related Products
- CD/DVD Components:
  - Design Considerations: While PC-122U is not the highest-flow grade for optical media (e.g., compared to PC-175), its clarity and flow properties suit secondary components. Design for minimal residual stress to maintain optical performance.
  - Applications: Protective cases for CDs/DVDs and optical drive components.

Processing Recommendations

Injection Molding:
- Drying: Dry at 120°C for 3–4 hours to remove moisture and prevent voids.
- Melt Temperature: 280–320°C to ensure optimal flow without degradation.
- Mold Temperature: 80–120°C to achieve good surface finish and minimize shrinkage.
- Injection Speed: Moderate to high to fill thin-walled parts effectively.
- Cooling Time: Optimize to prevent warpage, typically 10–30 seconds depending on part thickness.

Design Guidelines

Wall Thickness: Maintain uniform thickness (1.5–3 mm recommended) to avoid sink marks and ensure consistent cooling.
Ribs and Bosses: Use ribs (0.5–0.7 times wall thickness) for reinforcement and design bosses with sufficient draft angles (0.5–1°) for easy demolding.
Draft Angles: Apply 1–2° draft angles to facilitate part ejection.
Surface Finish: Use polished molds for transparent parts and textured molds for scratch-resistant surfaces.
Stress Management: Avoid sharp corners and incorporate fillets (minimum radius 0.5 mm) to reduce stress concentrations.

Environmental and Safety Considerations

Eco-Friendly Production: The non-phosgene melt process eliminates toxic chemicals and reduces wastewater, making PC-122U an environmentally responsible choice.
Recyclability: Polycarbonate is recyclable, but designers should consider end-of-life disassembly for sustainable product cycles.
Compliance: PC-122U is RoHS-compliant and FDA-certified for food-contact applications, ensuring safety in relevant designs.

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