HIPS Kumho HI425TV
HIPS Kumho HI425TV
Material Introduction: HIPS Kumho HI425TV is a high‑impact polystyrene plastic. It is widely utilized for its favorable impact resistance, good colorability, decent flowability, excellent electrical insulation, high heat resistance and easy‑processing performance.
Main Applications
TV cabinets, recorder frames, humidifiers, typewriter bodies, sports equipment, various office supplies, household‑appliance housings, electrical accessories, packaging materials, etc.
Physical Properties
| Performance Category | Test Item | Test Standard | Unit | Typical Value / Range |
|---|---|---|---|---|
| Physical Properties | Density | ASTM D792 | g/cm³ | 1.03‑1.04 |
| Melt Flow Rate (MFR) | ASTM D1238 (200°C/5.0kg) | g/10min | 4.5‑13 | |
| Water Absorption | ASTM D570 | % | 0.05 | |
| Mold Shrinkage (Flow Direction) | ASTM D955 | % | 0.30‑0.60 | |
| Mechanical Properties | Tensile Strength (Yield) | ASTM D638 | MPa | 23.5 (approx. 310 kg/cm²) |
| Elongation at Break (Yield) | ASTM D638 | % | 40 (or 55%) | |
| Flexural Strength (Yield) | ASTM D790 | MPa | 29.4‑34.3 (approx. 400 kg/cm²) | |
| Flexural Modulus | ASTM D790 | MPa | 1620 (approx. 22000 kg/cm²) | |
| Izod Notched Impact Strength (23°C) | ASTM D256 | J/m | 94‑98 (or 9.5 kg·cm/cm) | |
| Rockwell Hardness (Scale L) | ASTM D785 | ‑ | 60‑73 | |
| Thermal Properties | Heat‑Distortion Temperature (HDT, 1.8 MPa, unannealed) | ASTM D648 | °C | 76.0‑82 |
| Vicat Softening Temperature | ASTM D1525 | °C | 95.0‑99 | |
| Electrical Properties | Volume Resistivity | ASTM D257 | Ω·cm | >10¹⁶ |
| Flame‑Retardant Properties | UL94 Flammability Rating (1.5mm‑1.6mm) | UL94 | ‑ | HB |
| Safety Certifications | Food‑contact Property | FDA | ‑ | Suitable (shown in partial data sources) |
| RoHS Compliance | ‑ | ‑ | Compliant (shown in partial data sources) |
Injection Molding Parameters
| Process Parameter | Reference Range / Recommendation | Remarks & Descriptions |
|---|---|---|
| Drying Treatment | Normally unnecessary; dry at 70‑80°C for 2‑3 hours under improper storage conditions | HIPS has low water absorption (~0.05 %); drying is generally not required. Drying is recommended under high‑humidity environment or improper storage. |
| Barrel Temperature | 190‑240°C | Relatively higher injection and molding temperatures are preferred due to rubber‑modified composition. |
| Mold Temperature | 40‑60°C | Higher mold temperature helps reduce internal stress. |
| Injection Pressure | Medium‑to‑high | Sufficient holding pressure, holding time and cooling time are required. |
| Injection Speed | Medium speed | |
| Back Pressure | 0.5‑1.0 MPa (general HIPS recommendation) | Appropriate back pressure facilitates melt homogenization. |
| Screw Speed | Medium (e.g. 50‑100 rpm, general HIPS recommendation) | Avoid excessive screw speed to prevent shear overheating. |
Disclaimer: All above data is for reference only.
