HIPS Formosa Plastics Ningbo 825G
HIPS Formosa Plastics Ningbo 825G
Material Introduction: HIPS Formosa Plastics Ningbo 825G is a high‑gloss, high‑impact polystyrene plastic. It provides well‑balanced high gloss, favorable impact resistance and processing performance.
Main Applications
High‑gloss‑required articles such as household‑appliance (e.g. air‑conditioner) housings.
Physical Properties
| Performance Category | Test Item | Reference Test Standard | Unit | Typical Value / Range |
|---|---|---|---|---|
| Physical Properties | Melt Flow Rate (MFR) | ASTM D1238 (200°C/5kg) | g/10min | 3.5 |
| Density | ASTM D792 | g/cm³ | ~1.04 (typical value for HIPS) | |
| Mechanical Properties | Tensile Strength (TS) | ASTM D638 | MPa (or kg/cm²) | 300 (30.0 MPa) |
| Flexural Strength | ASTM D790 | MPa (or kg/cm²) | ‑ | |
| Flexural Modulus (FM) | ASTM D790 | MPa (or kg/cm²) | 20000 (2000 MPa) | |
| Izod Notched Impact Strength (1/4") | ASTM D256 | J/m (or kg·cm/cm) | 110 J/m (11 kg·cm/cm) | |
| Thermal Properties | Heat‑Distortion Temperature (HDT) | ASTM D648 | °C | ~88 (common value for HIPS) |
| Vicat Softening Temperature | ASTM D1525 | °C | ~95 (common value for HIPS) | |
| Optical Properties | Gloss | ‑ | ‑ | High‑gloss |
| Other Properties | Residual Styrene Monomer | ‑ | ppm max | ≤700 (common value for HIPS) |
| Mold Shrinkage | ASTM D955 | % | 0.4‑0.7 (typical value for HIPS) | |
| Flammability (UL94) | UL94 | ‑ | HB (to be confirmed) |
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 (generally below 0.1 %); drying is normally not required. Drying is recommended under high‑humidity environment or improper storage. |
| Barrel Temperature | 180‑220°C (or 190‑240°C) | Due to rubber component, relatively higher injection and molding temperature are preferred. Reference barrel setting: rear zone 190°C, middle zone 200°C, front zone 205°C, nozzle 210°C. |
| Mold Temperature | 20‑70°C (or 40‑60°C) | Higher mold temperature helps reduce internal stress and contributes to high‑gloss performance. |
| Injection Pressure | Medium‑to‑high | Sufficient holding pressure, holding time and cooling time are required. Holding pressure is normally 90 % of injection pressure. |
| Injection Speed | Medium speed | Excessively fast speed causes defects such as flash; too slow speed brings obvious weld lines. |
| Back Pressure | 0.5‑1.0 MPa (general HIPS recommendation) | Proper back pressure contributes to 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.
