HIPS 4240 is a very high impact polystyrene specifically engineered for the extrusion industry. This grade is designed to be diluted with crystal polystyrene, enhancing its applicability across various products. It features excellent melt strength, making it particularly suitable for extruded profiles. The grade is available in a white color, which is ideal for applications requiring a clean, consistent appearance without the need for additional coloring processes.
 
Key Features
Very High Impact Resistance: Provides enhanced durability and toughness, suitable for products that must withstand mechanical stress.
Good Melt Strength: Facilitates the extrusion process, allowing for the creation of complex profiles and shapes.
White Color: Offers a visually appealing finish, reducing the need for post-processing painting or coating.
 
Applications
Party Sheet, Cups, and Trays: Commonly used for disposable party items that require both strength and a pleasing appearance.
Egg Boxes: Provides the necessary impact resistance and formability for protective food packaging.
General Packaging: Suitable for a variety of packaging solutions where visual appeal and durability are important.
Vending Cups and Extruded Profiles: Ideal for products that require precise dimensions and good surface quality.
 
Typical Properties
Melt Flow Index (200°C/5kg): 3.5 g/10 min (ASTM D-1238), indicating the material's ease of flow under heat, which affects the processing speed and ease.
Styrene Residual Monomer: Less than 500 ppm (CLG LABPSG004), ensuring low levels of residual monomers for safety.
Vicat Softening Point: 97°C (ASTM D-1525), the temperature at which the polymer begins to soften under a specified load.
Rockwell Hardness: Scale/L71 (ASTM D-785), measuring the surface hardness of the material.
Tensile Stress at Yield: 29 MPa (ASTM D-638), indicating the stress level at which the material begins to deform.
Tensile Stress at Break: 27 MPa (ASTM D-638), showing the material's maximum stress capacity before breaking.
Elongation at Break: 45% (ASTM D-638), demonstrating the material's flexibility and ductility under stress.
Tensile Modulus: 3110 MPa (ASTM D-638), reflecting the stiffness of the material.
Izod Impact Strength: 6 KJ/m2 (ISO 180/1A), demonstrating the material's resistance to impact at room temperature.
 
Conclusion
HIPS 4240 is tailored for industries looking for high-performance material properties in extrusion applications. Its high impact resistance, excellent melt strength, and aesthetic appeal make it a preferred choice for manufacturers seeking to produce durable, visually appealing products efficiently and cost-effectively.