HIPS Chimei Zhenjiang PH‑888H
HIPS Chimei Zhenjiang PH‑888H
Material Introduction: HIPS Chimei Zhenjiang PH‑888H is a heat‑resistant, high‑impact polystyrene material combining favorable mechanical properties, mainly designed for injection‑molding processes. It is normally supplied as milky‑white opaque pellets and can be freely color‑formulated.
Main Applications
‑ Household Appliances: TV housings, commercial machines and electrical products. ‑ Electronic & Electrical: Toys, electronic‑product components and electronic‑product housings. ‑ Daily Commodities: Household articles, stationery, etc. ‑ Packaging Materials: Food packaging, daily‑goods packaging and so on.
Physical Properties
| Property Item | Test Condition / Standard | Value | Unit |
|---|---|---|---|
| Density | ASTM D‑792 | 1.05 | g/cm³ |
| Melt Flow Rate (MFR) | 200°C/5.0 kg, ASTM D‑1238 | 3.6 | g/10min |
| Melt Flow Rate (MFR) | 200°C/10.0 kg, ISO 1133 | 32 | g/10min |
| Water Absorption | ‑ | ＜0.1 (typical) | % |
| Mold Shrinkage | ‑ | 0.4‑0.7 (typical) | % |
| Tensile Strength | ASTM D‑638 | 300 | kg/cm² |
| Flexural Strength | ASTM D‑790 | 440 | kg/cm² |
| Flexural Modulus | ASTM D‑790 | 2.0 × 10⁴ | kg/cm² |
| Elongation at Break | ASTM D‑638 | 70 | % |
| Izod Notched Impact Strength | 1/8", ASTM D‑256 | 11.0 | Kg‑cm/cm |
| Izod Notched Impact Strength | 1/4", ASTM D‑256 | 8.0 | Kg‑cm/cm |
| Rockwell Hardness | ASTM D‑785 | L‑85 | ‑ |
| HDT (Heat‑Distortion Temperature, annealed, 1.80 MPa) | ASTM D‑648 | 95 (203) | °C (°F) |
| HDT (Heat‑Distortion Temperature, unannealed, 1.80 MPa) | ASTM D‑648 | 80 (176) | °C (°F) |
| Vicat Softening Temperature | ASTM D‑1525 | 102 (216) | °C (°F) |
| UL94 Flammability Rating | 1/16" | HB | Grade |
Injection Molding Parameters
| Process Parameter | Recommended Range | Unit | Remarks & Descriptions |
|---|---|---|---|
| Drying Treatment | 2‑3 h at 80°C | ‑ | HIPS has low water absorption; pre‑drying is generally unnecessary for processing. Drying is recommended if material is stored in humid environment or exposed for long time after package opening. |
| Barrel Temperature | 180‑260 | °C | Preferred processing temperature:190‑240°C. Avoid long‑term residence at high temperature to prevent degradation. |
| Mold Temperature | 10‑60 | °C | Carefully controlled mold temperature is critical for surface quality, weld‑line strength and warpage resistance. Higher mold temperature generally improves surface gloss and reduces internal stress. |
| Injection Pressure | Adjust according to product structure and dimension | MPa | Sufficient holding pressure is required to avoid sink marks. |
| Screw Speed | Medium speed (50‑100 rpm recommended) | rpm | Excessively high speed shall be avoided to prevent excessive shear heat. |
Disclaimer: All above data is for reference only.
