GPPS 1810 is an easy-flowing crystal polystyrene specifically designed for injection molding applications. This grade is particularly noted for its use in medical and laboratory applications due to its clarity and rigidity. It has been tailored to produce items such as Petri dishes, blood sample tubes, and disposable beakers, which require precise dimensional stability and chemical resistance.
 
Key Features
Easy Flowing: Allows for the smooth processing and filling of intricate mold designs.
High Clarity: Ideal for applications where visual inspection of contents is necessary.
Chemical Resistance: Suitable for use in environments where exposure to chemicals is common.
 
Applications
Medical Applications: Petri dishes and blood sample tubes that require sterility and clarity.
Laboratory Equipment: Disposable beakers and other labware needing chemical resistance and durability.
Thin Wall Moldings: Products requiring precision and thin-wall capabilities in their design.
 
Processing Guidelines
Drying: Recommended drying at 70°C for 2-4 hours if moisture affects product quality, ensuring optimal processing conditions.
 
Typical Properties
Melt Flow Index (200°C/5kg): 20 g/10 min (ASTM D-1238), indicating the material's excellent flow properties.
Styrene Residual Monomer: Less than 500 ppm (CLG LABPSG004), ensuring low residual content for enhanced safety.
Vicat Softening Point: 90°C (ASTM D-1525), the temperature at which the polymer begins to soften.
Rockwell Hardness: L70 (ISO 2039-2), measuring the surface hardness of the material.
Tensile Strength at Break: 42 MPa (ISO 527-2), showing the material's maximum stress capacity before breaking.
Elongation at Break: 2% (ISO 527-2), indicating low elongation, highlighting its rigidity.
Tensile Modulus: 3100 MPa (ISO 527-2), reflecting the high 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 1810 is engineered for industries requiring a polystyrene with high flow properties and precision in medical and laboratory applications. Its clarity, chemical resistance, and ease of processing make it a reliable choice for manufacturers focusing on medical disposables and other precision-molded products.