PBT-DuPont Crastin SK605
Achieving uncompromised electrical insulation alongside heavy-duty mechanical stiffness under high heat requires a high-performance polyester, which Celanese’s Crastin SK605 (formerly DuPont) delivers through its 30% glass fiber reinforced polybutylene terephthalate matrix. Featuring a density of 1.53 g/cm³ and a melt mass-flow rate of 10 g/10 min, this lubricated, semi-crystalline grade is the global benchmark for intricate automotive connector arrays, electrical bobbins, and consumer appliances. Jucheng Precision, under IATF 16949 and ISO 9001 frameworks, specializes in molding Crastin SK605. Supported by our 5-axis CNC-machined H13 steel tooling, we control its anisotropic shrinkage (0.3% parallel, 1.1% normal) to eliminate warpage, verified by Zeiss CMM.
Crastin SK605 Mechanical Strength & Electrical Insulation Profile
Crastin® SK605 NC010 is a 30% glass fiber reinforced, lubricated polybutylene terephthalate resin engineered by Celanese (formerly DuPont) to deliver exceptional strength, stiffness, and high arc resistance:
| Mechanical / Electrical Metrics | Typical Value (ISO Standard) | Lợi thế ép phun và ứng dụng cuối |
|---|---|---|
| Tensile Stiffness | Tensile Modulus 10,000 MPa / Strength 140 MPa | Provides exceptional, metal-like structural rigidity, replacing die-cast zinc or aluminum brackets in automotive interiors. |
| Electrical Isolation | Dielectric Strength 20 kV/mm (at 2mm) | Outstanding insulation resistance and arc-tracking resistance, preventing voltage leaks in high-voltage EV connectors. |
| Processing Flow | MVR 7.0 cm³/10min (MFR 10 g/10min) | Easy-release lubricated matrix ensures smooth, rapid flow and clean, automatic ejection on high-speed automated runs. |
Structural Component Process Configurations for Crastin SK605
With its high-stiffness reinforcement and lubricated chemistry, Crastin SK605 is highly optimized for complex dynamic components:
| Process Category | Khả năng tương thích khuôn & Chi tiết thiết lập quy trình |
|---|---|
| 精密电气连接器 | Excellent. Fully optimized for automotive engine block sensor plugs, high-density multi-pin connectors, and dynamic relay housings. |
| 重型绕组与骨架 | Excellent. High tensile modulus prevents part deformation or deflection under high copper wire tension on multi-slot bobbins. |
| 高美观家电装饰条 | Good. Easy-release lubricants combined with optimized tooling result in premium surface finishes with minimized glass fiber visibility. |
PBT-DuPont Crastin SK605 Mold Engineering Blueprint
Molding an un-lubricated crystalline composite like Crastin SK605 requires strict moisture control and optimized gating to prevent abrasive tool wear and warpage:
硬化 S136 模具（防止磨蚀性磨损）
30% glass fibers act as an abrasive medium under high injection speeds. Jucheng’s tooling division prevents cavity erosion by constructing molds with premium S136 stainless tool steel hardened to 48–52 HRC and machined on our 5-axis CNCs, ensuring long-term parting line precision and flash-free components.
Kiểm soát co ngót không đẳng hướng và cong vênh
Crastin SK605 shrinks much less along the flow (0.30%) than perpendicular to it (1.10%). We use Moldflow simulation during our free DFM review to balance gate locations, aligning glass fibers uniformly to prevent component warping and out-of-tolerance dimensions.
Quy trình sấy hút ẩm (Ngăn ngừa thủy phân)
PBT is highly sensitive to moisture at high melt temperatures. Wet molding results in rapid hydrolytic chain cleavage, causing severe splay, gas bubbles, and a major drop in impact strength. We desiccant dry Crastin SK605 resin at 120°C (248°F) for 3–4 hours, keeping moisture below 0.04%.
Balanced Cooling Loops
Để ngăn ngừa cong vênh trong các khung điện phức tạp, chúng tôi gia công các mạch làm mát cân bằng, phù hợp trực tiếp vào các khối lõi để tăng tốc độ tản nhiệt, giảm thời gian chu kỳ và ngăn ngừa cong vênh do nhiệt.
Key Application Fields for PBT-DuPont Crastin SK605
- Automotive Electrical & Powertrains (IATF 16949): High-voltage EV connectors, ignition coil bobbins, throttle sensor housings, headlamp bezel assemblies, and electric water pump housings.
- Linh kiện điện & Lưới điện thông minh: Bộ ngắt mạch công nghiệp, đế rơ le hạng nặng, khối đấu dây, đồng hồ điện thông minh và ống chỉ cuộn dây.
- Consumer Electronics & Appliances: Tay cầm thiết bị hạng nặng, vỏ đèn pha ngoài trời, viền đồng hồ nhiệt độ cao và vỏ van hóa chất kết cấu.
Properties
| Mật độ | 1.53 g/cm³ |
| Chỉ số chảy khối lượng (MFR) (250°C/2.16kg) | 10 g/10 min |
| Melt Volume-Flow Rate (MVR) (250°C/2.16kg) | 7 cm³/10min |
| Mô đun kéo | 10,000 MPa |
| Ứng suất kéo tại điểm đứt | 140 MPa |
| Độ giãn dài khi đứt | 2.7 % |
| Độ bền uốn | 210 MPa |
| Mô đun uốn | 9,000 MPa |
| Độ bền va đập Charpy có khía (23°C) | 9 kJ/m² |
| Nhiệt độ nóng chảy (DSC) | 225 °C |
| Heat Deflection Temperature (HDT @ 0.45 MPa) | 215 °C |
| Heat Deflection Temperature (HDT @ 1.80 MPa) | 205 °C |
| Độ co rút khuôn tuyến tính (Hướng dòng chảy) | 0.3 % |
| Linear Mold Shrinkage (Cross Direction) | 1.1 % |
| Dielectric Strength (2.0mm) | 20 kV/mm |
| Kích thước chi tiết tối đa | 1000 x 800 mm |
| Kích thước chi tiết tối thiểu | 1 x 1 mm |