ABS Kumho Petrochemical 750NSH (South Korea)
ABS Kumho Petrochemical 750NSH (South Korea)
Product Introduction ABS Kumho Petrochemical 750NSH is a general‑purpose injection‑molding ABS plastic featuring high flowability, high impact resistance and high rigidity, manufactured by Kumho Petrochemical of South Korea.
Main Applications
Electronic & Electrical Housings: Housings and internal structural parts for large home appliances such as televisions, washing machines, refrigerators and air conditioners; as well as housings for office‑equipment including printers, copiers and monitors.
Automotive Components: Interior trims, instrument‑panel assemblies, grilles, lamp frames and other parts requiring certain strength and heat‑resistance performance.
Consumer Goods: Toys, stationery, luggage cases, household articles and other products requiring good appearance and durability.
Food‑Contact Applications: Suitable for selected food‑packaging or food‑contact articles subject to compliance with local regulatory requirements.
Performance Parameters
| Property Category | Test Item | Test Condition | Test Method | Typical Value | Unit |
|---|---|---|---|---|---|
| Physical Properties | Density (Specific Gravity) | 23℃/23℃ | ASTM D‑792 | 1.04 | g/cm³ |
| Melt Flow Rate (MFR) | 200°C /5.0 kg | ASTM D‑1238 | 4.5 | g/10min | |
| Melt Flow Rate (MFR) | 200°C /21.6 kg | Kumho in‑house method | 50 | g/10min | |
| Molding Shrinkage | ‑ | ASTM D‑955 | 0.4‑0.7 | % | |
| Mechanical Properties | Tensile Strength | 23°C | ASTM D‑638 | 480 (≈47.1 MPa) | kg/cm² (MPa) |
| Flexural Strength | 23°C | ASTM D‑790 | 650 (≈63.7 MPa) | kg/cm² (MPa) | |
| Flexural Modulus | 23°C | ASTM D‑790 | 24000 (≈2350 MPa) | kg/cm² (MPa) | |
| Izod Notched Impact Strength | 1/4" (6.4 mm), 23°C | ASTM D‑256 | 23 | kg·cm/cm | |
| Izod Notched Impact Strength | 1/8" (3.2 mm), 23°C | ASTM D‑256 | 26 | kg·cm/cm | |
| Rockwell Hardness | R‑Scale | ASTM D‑785 | 108 | R scale | |
| Elongation at Break | ‑ | ASTM D‑638 | 30 | % | |
| Thermal Properties | Heat‑Deflection Temperature (HDT) | Unannealed, 1.82 MPa | ASTM D‑648 | 85 | °C |
| Heat‑Deflection Temperature (HDT) | Annealed, 1.82 MPa | ASTM D‑648 | 95 | °C | |
| Vicat Softening Temperature | ‑ | ASTM D‑1525 | 95 | °C | |
| Other Properties | Flammability Rating | ‑ | UL 94 | HB | ‑ |
| Food‑Contact Compliance | ‑ | ‑ | Suitable | ‑ |
Injection‑Molding Parameters
| Process Parameter | Reference Range | Remarks & Instructions |
|---|---|---|
| Drying Treatment | 80‑85°C, 2‑4 hours | Keep hopper heated to prevent re‑moisture absorption; ensure moisture content below 0.1%. |
| Barrel Temperature | Rear zone:180‑190℃ Middle zone:200‑210℃ Front zone:210‑230℃ Nozzle:210‑230℃ (do not exceed 240°C to avoid material degradation) |
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| Mold Temperature | 50‑80℃ (commonly 60‑70℃) | Higher mold temperature improves surface gloss and reduces internal stress. |
| Injection Pressure | 60‑100 MPa | Adjust according to flow length and part structure. |
| Holding Pressure | Approx. 30%‑60% of injection pressure | Optimize per wall thickness and structure to reduce internal stress and shrinkage. |
| Injection Speed | Medium‑high speed | High‑speed improves gloss yet may cause flow marks; adopt slow‑to‑fast profile for high‑appearance requirements. |
| Screw Speed | 50‑80 rpm | ‑ |
| Back Pressure | 0.5‑1.5 MPa (5‑15 kg/cm²) | Proper back‑pressure ensures uniform plasticization; excessive back‑pressure reduces production efficiency. |
Note: All data above is for reference only.
