ABS-Chi Mei POLYLAC PA-765
ABS-Chi Mei POLYLAC PA-765 is a high-flow, flame-retardant acrylonitrile butadiene styrene copolymer engineered by Chi Mei Corporation, certified to meet stringent UL 94 V-0, 5VB, and 5VA flammability standards. With a density of 1.19 g/cm³ and a melt index of 5.0 g/10 min, this grade is the global standard for complex power panels, EV battery enclosures, and telecommunication housings. Jucheng Precision, under ISO 9001 and IATF 16949 frameworks, specializes in molding PA-765, resolving processing outgassing and mold corrosion. Utilizing S136 corrosion-resistant stainless tool steel and optimized venting, we secure zero-defect, high-aesthetic parts verified by Zeiss CMM inspection.
POLYLAC PA-765 Flammability and Purity Profile
POLYLAC® PA-765 is a high-flow, flame-retardant ABS copolymer developed by Chi Mei Corporation, certified to meet stringent UL 94 safety ratings for high-voltage and critical components:
| Flammability Rating | Minimum Thickness Required | Application Safety Advantage |
|---|---|---|
| UL 94 V-0 / 5VB | 1.5 mm Wall Thickness | Self-extinguishes within 10 seconds under open-flame exposure with zero flaming drips, securing safety in EV battery module holders. |
| UL 94 5VA | 2.5 mm Wall Thickness | Resists major bar flame ignition without any burn-through or holes. Essential for high-voltage power distribution boxes. |
| UL 94 V-1 | 1.0 mm Wall Thickness | Maintains ignition-resistant behavior even in ultra-thin microelectronic structures and switches. |
Process Compatibility for High-Flow FR-ABS PA-765
With an exceptional Melt Volume-Flow Rate of 50 cm³/10min, POLYLAC PA-765 flows beautifully to prevent short shots:
| Production Process | Molding Strategy & Mechanical Details |
|---|---|
| Thin-Wall Electronics Molding | Excellent. The high flow index allows fast filling of intricate, multi-cavity electronic panel housings and terminal grids. |
| Insert & Multi-Pin Encapsulation | Excellent. Allows smooth, low-pressure flow around metal terminal contact pins, ensuring tight seals without cracking. |
| Standard Structural Molding | Excellent. Perfect for large-scale electrical control boxes, copier covers, printer trays, and high-safety household housings. |
ABS-Chi Mei POLYLAC PA-765 Tooling & Corrosion Prevention Guide
Molding a flame-retardant copolymer like PA-765 demands strict thermal boundaries and corrosion-resistant tool designs to protect surface finish:
- Rust-Resistant Tool Selection: During continuous processing, the flame-retardant additives in PA-765 degrade slightly, releasing corrosive acidic vapors that can ruin mold surfaces. Jucheng’s tooling division resolves this by using S136 stainless steel hardened to 48–52 HRC to secure long-term part aesthetics.
- Desiccant Drying & Splay Prevention: Wet FR-ABS experiences severe thermal degradation, resulting in splay, silver streaks, and weak structural joints. We dry raw material in desiccant hopper dryers at 80°C–85°C (176°F to 185°F) for 2–4 hours, keeping moisture below 0.02%.
- Melt Temperature Restriction: Barrel temperatures are kept within a strict window of 200°C–230°C (392°F to 446°F). Exceeding 235°C will break down the active flame-retardant agents, causing part discoloration and structural weakening.
- Highly-Ventilated Venting Design: Gas outgassing from FR resins can cause trapped air pockets and diesel burn marks on rib tips. We machine deep venting channels (0.015mm to 0.020mm) on parting lines to secure zero-burn parts.
Key Application Fields for ABS-Chi Mei POLYLAC PA-765
- EV Batteries & Automotive (IATF 16949): Lithium-ion battery module frames, battery holders, high-voltage busbar isolators, and electrical fuse boxes.
- Smart-Grids & Electrical Gear: Industrial circuit breakers, heavy-duty relay sockets, wall switch plates, smart power meters, and din-rail covers.
- Telecom & Consumer Electronics: High-safety Wi-Fi router casings, adapter housings, power tool housings, and set-top boxes.
Properties
| Density | 1.19 g/cm³ |
| Melt Mass-Flow Rate (MFR) (200°C/5.0kg) | 5 g/10 min |
| Melt Volume-Flow Rate (MVR) (220°C/10kg) | 50 cm³/10min |
| Tensile Strength at Yield | 38.1 MPa |
| Tensile Elongation at Break | 15 % |
| Flexural Strength | 60.7 MPa |
| Flexural Modulus | 2,070 MPa |
| Izod Notched Impact Strength (1/8", 23°C) | 210 J/m |
| Rockwell Hardness (R-Scale) | 100 - |
| Vicat Softening Point (50°C/hr, 5kg) | 90 °C |
| Heat Deflection Temperature (HDT @ 1.82 MPa) | 73 °C |
| Flammability Rating (1.5mm) | UL 94 V-0 / 5VB Class |
| Flammability Rating (2.5mm) | UL 94 5VA Class |
| Linear Mold Shrinkage | 0.30 - 0.60 % |
| Maximum Part Size | 1000 x 800 mm |
| Minimum Part Size | 1 x 1 mm |