HIPS Huajin Chemical 825
HIPS Huajin Chemical 825
Material Introduction: HIPS Huajin Chemical 825 is a high‑toughness, easy‑to‑process and low‑cost high‑impact polystyrene plastic. It delivers merits including good processing flowability, outstanding impact resistance, high surface gloss, excellent colorability and dimensional stability. It is suitable for general‑purpose injection‑molding applications requiring impact resistance.
Main Applications
Consumer goods: toy manufacturing, household articles, stationery supplies.
Electrical‑electronic housings: remote‑control housings, small‑home‑appliance buttons, printer components, power‑switch panels (UL94 HB flammability rating).
Packaging materials: cosmetic bottle caps, daily‑chemical bottle bodies (food‑contact compliance to be verified), disposable tableware trays (derived from economy‑grade food‑contact HIPS grade).
Industrial components: instrument protective covers, pipe connectors, logistics turnover boxes (stacking compression resistance ≥50 kg).
Physical Properties
| Performance Category | Test Standard | Unit | Typical Value | Performance Description |
|---|---|---|---|---|
| Physical Properties | ||||
| Density | GB/T 1033 | g/cm³ | 1.04‑1.06 | Advantage for lightweight design |
| Water Absorption (24 h) | ISO 62 | % | 0.05‑0.08 | Pre‑drying not required before injection molding except in humid environments |
| Mechanical Properties | ||||
| Tensile Strength | GB/T 1040 | MPa | 25‑30 | Medium strength |
| Elongation at Break | GB/T 1040 | % | 30‑50 | Superior toughness versus GPPS |
| Flexural Modulus | GB/T 9341 | MPa | 1800‑2200 | Moderate rigidity |
| Charpy Notched Impact Strength | GB/T 1043 | kJ/m² | 8.0‑12.0 | Core impact‑resistance indicator |
| Thermal Properties | ||||
| Heat‑Distortion Temperature (0.45 MPa) | GB/T 1634 | °C | 75‑80 | Avoid long‑term service above 80 °C |
| Vicat Softening Point | GB/T 1633 | °C | 95‑100 | Method B50 |
| Processing Properties | ||||
| Melt Flow Rate | GB/T 3682 | g/10min | 4.0‑6.0 | 200 °C / 5 kg load |
| Injection‑Molding Temperature Range | ‑ | °C | 180‑230 | Recommended mold temperature: 20‑60 °C |
Injection Molding Parameters
| Process Parameter | Reference Range / Recommendation | Remarks & Descriptions |
|---|---|---|
| Drying Treatment | 70‑80 °C for 2‑3 hours (subject to storage conditions) | HIPS features low water absorption; drying is generally unnecessary. 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 | 60‑150 MPa (general HIPS range) | Sufficient holding pressure, holding time and cooling time are required. |
| Injection Speed | Medium speed | Avoid excessive speed causing molding defects. |
| Back Pressure | 0.5‑1.0 MPa | Appropriate back pressure facilitates melt homogenization. |
| Screw Speed | 50‑100 rpm | Avoid excessive screw speed to prevent shear overheating. |
Disclaimer: All above data is for reference only.
