HIPS Chimei Zhenjiang PH‑88
Material Introduction: HIPS Chimei Zhenjiang PH‑88 is a high‑impact polystyrene plastic featured by heat resistance and high‑impact performance. It is normally supplied as milky‑white opaque pellets and allows arbitrary color matching. With well‑balanced mechanical, processing and electrical properties, it is mainly suitable for injection molding.
Main Applications
‑ Household Appliances: TV housings, commercial machines and electrical products, washing‑machine inner tubs, refrigerator liners, etc. ‑ Electronic & Electrical: Instrument and meter accessories, push‑buttons, electrical fittings for electrical/electronic applications. ‑ Daily Commodities & Toys: Plastic toys, household articles, stationery, cosmetic containers, etc. ‑ Packaging Materials: Food packaging, cosmetic packaging, daily‑goods packaging, etc.
Physical Properties
| Property Item |
Test Condition / Standard |
Value |
Unit |
| Density |
ISO 1183 |
1.05 |
g/cm³ |
| Melt Flow Rate (MFR) |
200°C/5.0 kg, ISO 1133 |
4.00 |
cm³/10min |
| Melt Flow Rate (MFR) |
200°C/5.0 kg, ASTM D1238 |
5.5 |
g/10 min |
| Melt Flow Rate (MFR) |
200°C/10.0 kg, ISO 1133 |
52 |
g/10 min |
| Water Absorption |
ISO 62 |
＜0.1 |
% |
| Mold Shrinkage |
‑ |
0.4‑0.7 |
% |
Mechanical Properties
| Property Item |
Test Condition / Standard |
Value |
Unit |
| Tensile Yield Stress |
23°C, ISO 527‑2 |
29 |
MPa |
| Tensile Yield Stress |
ISO 527‑2/50 |
27.0 |
MPa |
| Elongation at Break |
23°C, ISO 527‑2 |
70 |
% |
| Elongation at Break |
ISO 527‑2/50 |
56 |
% |
| Flexural Strength |
23°C, ISO 178 |
40 |
MPa |
| Flexural Strength |
ISO 178 |
35.0 |
MPa |
| Flexural Modulus |
ISO 178 |
1200 |
MPa |
| Charpy Un‑notched Impact Strength |
23°C, ISO 179/1eU |
8.00 |
kJ/m² |
| Charpy Un‑notched Impact Strength |
ISO 179/2U |
100 |
kJ/m² |
| Charpy Notched Impact Strength |
ISO 179 |
11 |
kJ/m² |
| Izod Notched Impact Strength |
1/8", ASTM D256 |
10.0 |
Kg‑cm/cm |
| Izod Notched Impact Strength |
1/4", ASTM D256 |
8.5 |
Kg‑cm/cm |
| Rockwell Hardness (L‑scale) |
ASTM D785 |
60 |
‑ |
| Rockwell Hardness |
ASTM D785 |
L‑77 |
‑ |
Thermal Properties
| Property Item |
Test Condition / Standard |
Value |
Unit |
| HDT (Heat‑Distortion Temperature) |
1.80 MPa, unannealed, ISO 75‑2/Af |
76 |
°C |
| HDT (Heat‑Distortion Temperature) |
1.8 MPa, unannealed, ISO 75‑2/A |
74.0 |
°C |
| HDT (Heat‑Distortion Temperature) |
1.8 MPa, annealed, ASTM D648 |
90 (194) |
°C (°F) |
| HDT (Heat‑Distortion Temperature) |
1.8 MPa, unannealed, ASTM D648 |
76 (180) |
°C (°F) |
| Vicat Softening Temperature |
50°C/hr, ISO 306/A50 |
100 |
°C |
| Vicat Softening Temperature |
ASTM D1525 |
98 (208) |
°C (°F) |
| Vicat Softening Temperature |
ISO 306/A50 |
96.0 |
°C |
Flame‑Retardant Properties
| Property Item |
Test Condition / Standard |
Value |
Unit |
| Flame Rating |
UL94, 1.50 mm |
HB |
Grade |
| Flame Rating |
UL94, 1.60 mm |
HB |
Grade |
Injection Molding Parameters
| Process Parameter |
Recommended Range |
Unit |
Remarks & Descriptions |
| Barrel Temperature |
190‑240 |
°C |
Recommended processing temperature:190‑240°C. General HIPS processing range of 185‑215°C is also for reference. Avoid long‑term residence at high temperature to prevent degradation. |
| Mold Temperature |
40‑80 |
°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 |
30‑150 (general PS range) |
MPa |
Due to rubber component in HIPS, relatively higher injection pressure and molding temperature are preferred. Sufficient holding pressure is required to prevent sink marks. |
| Drying Treatment |
2‑3 h at 80°C |
‑ |
HIPS features low water absorption; pre‑drying is generally unnecessary. Drying is recommended if material is stored in humid environment or exposed for long time after package opening. |
Disclaimer: All above data is for reference only.
