HIPS Iran Petrochemical 7240
Material Introduction: HIPS Iran Petrochemical 7240 is a high‑impact polystyrene modified by adding rubber components such as polybutadiene into polystyrene. It features favorable impact resistance and good processability, and produces opaque finished parts.
Main Applications
‑ Packaging Materials: Packaging and disposable articles. ‑ Household Appliances: TV housings, commercial machines and electrical products. ‑ Others: Toys, recreational goods and instruments.
Physical Properties
| Property Item |
Test Standard |
Value |
Unit |
| Density |
ISO 1183 |
1.04 |
g/cm³ |
| Water Absorption (24 hr, 23℃) |
ISO 62 |
0.10 |
% |
| Melt Mass‑Flow Rate (200℃/5kg) |
ISO 1133 |
4.5 |
g/10min |
| Mold Shrinkage |
ISO 294‑4 |
0.40‑0.70 |
% |
Mechanical Properties
| Property Item |
Test Standard |
Value |
Unit |
| Flexural Modulus |
ISO 178 |
1850 |
MPa |
| Tensile Modulus |
ISO 527‑2 |
1950 |
MPa |
| Stress at Break |
ISO 527‑2 |
21.0 |
MPa |
| Strain at Break |
ISO 527‑2 |
60 |
% |
| Charpy Notched Impact Strength |
ISO 179/1eA |
11.0 |
kJ/m² |
| Izod Notched Impact Strength |
ISO 180/1A |
11.0 |
kJ/m² |
| Rockwell Hardness (R‑scale) |
ISO 2039‑2 |
65 |
‑ |
Thermal Properties
| Property Item |
Test Condition |
Test Standard |
Value |
Unit |
| HDT (Heat‑Distortion Temperature) |
1.80 MPa, annealed |
ISO 75‑2/A |
90.0 |
°C |
| HDT (Heat‑Distortion Temperature) |
1.80 MPa, unannealed |
ISO 75‑2/A |
74.0 |
°C |
| Vicat Softening Temperature |
50°C/h, 50N |
ISO 306 |
85.0 |
°C |
Electrical Properties
| Property Item |
Test Standard |
Value |
Unit |
| Surface Resistivity |
IEC 60093 |
1.0E+13 |
ohms |
| Dielectric Strength |
IEC 60243‑1 |
150.00 |
kV/mm |
Injection Molding Parameters
| Process Parameter |
Recommended Range |
Unit |
Remarks & Descriptions |
| Barrel Temperature (Melt Temp) |
190‑240 |
°C |
Recommended processing temperature:190‑240°C. Due to rubber component in HIPS, relatively higher injection pressure and molding temperature are preferred. |
| Mold Temperature (Mold Temp) |
10‑60 |
°C |
|
| Injection Pressure |
‑ |
‑ |
Sufficient holding pressure is required. |
| Drying Treatment |
(Optional) 2‑3 h at 71°C (160°F) |
‑ |
HIPS resin absorbs moisture slowly, so drying is generally unnecessary. Drying is recommended if the material gets damp. |
Other Notes
White‑edge defects may occur on HIPS molded parts, which can be improved by increasing mold temperature and clamping force, and reducing holding pressure and holding time.
Disclaimer: All above data is for reference only.
