GPPS 1028 is a high-performance General Purpose Polystyrene (GPPS) developed through the continuous mass polymerization of styrene monomer. This product is distinguished by its very high molecular weight, high heat grade, high melt strength, and excellent clarity and mechanical strength. It is designed primarily for extrusion and molding applications.
 
Product Specifications
Manufacturing Process: Continuous mass polymerization of styrene, ensuring consistent quality and performance.
Physical Characteristics: It features high molecular weight and high melt strength, which contribute to its robust processing capabilities and final product performance.
Clarity and Mechanical Strength: Offers good clarity, making it suitable for applications where visual appeal is important, coupled with strong mechanical properties for structural integrity.
 
Typical Applications
XPS Sheets and Plates: Recommended for extruded polystyrene (XPS) sheets and plates, widely used in building insulation due to their thermal properties and moisture resistance.
Extruded Embossed Sheets: Suitable for producing embossed sheets used in various decorative and functional applications within the construction and packaging industries.
Food Applications: Appropriate for use in food packaging, where its purity and compliance with food safety standards are critical.
 
Key Properties and Testing Methods
Melt Flow Index (MFI): 2.4 g/10min at 200°C and 5 kg (ASTM D1238), indicating the flow rate of the polymer melt, which affects processing efficiency and product quality.
Tensile Strength: 55 MPa (ASTM D638), measuring the material's resistance to being pulled apart, indicating strong cohesive forces within the polymer matrix.
Flexural Modulus: 3200 MPa (ASTM D790), which describes the material’s stiffness or resistance to bending, crucial in structural applications.
Izod Impact (Notched): 3 KJ/m² (ISO 180), reflecting the material's ability to withstand impact forces, an important characteristic for products subject to sudden or sharp impacts.
Vicat Softening Point: 102°C (ASTM D1525, 50°C/hr, 1 kg), the temperature at which the material begins to soften, important for understanding its thermal tolerance.
 
Packaging and Compliance
Packaging: GPPS 1028 is available in cylindrical pellets approximately 2.5×2.5 mm in size and is typically supplied in 25 kg bags, facilitating handling, storage, and transport.
Regulatory Compliance: Manufacturers using GPPS 1028 for food contact applications must ensure compliance with migration requirements, highlighting the product's suitability for food-related uses but necessitating careful application to meet regulatory standards.
 
Summary
GPPS 1028 is engineered for manufacturers seeking a reliable, high-quality polystyrene product that offers excellent processing characteristics, mechanical strength, and compliance with food safety standards. Its specific properties make it ideal for a variety of applications, including construction insulation panels, decorative sheets, and food packaging solutions.