GPPS 1540B is a high-flowing crystal polystyrene designed primarily for extrusion and injection applications. This grade is specifically formulated to enhance extruder output and reduce thermoforming cycle time when mixed with super high impact polystyrene, such as HIPS 7240. It is noted for its ease of processing but is not suitable for glossy-layer co-extrusion. GPPS 1540B has received food contact approval, making it applicable for various packaging and consumer product uses.
 
Key Features
High Melt Flow Index: Facilitates increased productivity and efficiency in manufacturing processes.
Compatibility: Designed to be mixed with high impact polystyrene for improved performance.
Food Contact Approval: Suitable for use in food-related applications, adhering to safety standards.
 
Applications
Packaging Articles: Ideal for creating containers and casings in food packaging.
Petri Dishes and Laboratory Equipment: Used in the production of disposable labware.
Office Equipment and Supplies: Suitable for manufacturing items like pen barrels and office organizers.
Refrigerator Components: Utilized in making crisper boxes and other fridge storage solutions.
Consumer Products: Effective in producing cups and other household items.
 
Processing Guidelines
Drying: If moisture affects product quality, granules of GPPS 1540B can be dried at 70°C for 2-4 hours.
Typical Properties
Melt Flow Index (200°C/5kg): 11 g/10 min (ASTM D-1238), indicating the material’s excellent flow properties.
Styrene Residual Monomer: <500 ppm (CLG LABPSG004), ensuring low residual content for safety.
Vicat Softening Point: 91°C (ASTM D-1525), indicating the temperature at which the polymer begins to soften.
Rockwell Hardness: L70 (ISO 2039-2), measuring the surface hardness of the material.
Tensile Stress at Break: 42 MPa (ISO 527-2), showing the material's maximum stress capacity before breaking.
Elongation at Break: 2% (ISO 527-2), demonstrating low elongation, highlighting its brittleness.
Tensile Modulus: 3100 MPa (ISO 527-2), reflecting the stiffness of the material.
Density and Shrinkage: Approximately 1.04 kg/lit and 0.4-0.7% (ASTM D-955), crucial for processing and dimensional considerations.
 
Conclusion
GPPS 1540B is engineered for manufacturers seeking a reliable, easy-to-process polystyrene for applications ranging from food packaging to office supplies and refrigerator components. Its high melt flow index and food contact approval make it a versatile choice for industries prioritizing efficiency and compliance with health standards.