Polystyrene manufacturers. Polystyrene (PS) / ˌpɒliˈstaɪriːn / is a synthetic polymer made from monomers of the aromatic hydrocarbon styrene. In the plastic resin identification coding system, PS is designated by the number 6 (a triangular chasing-arrows symbol with the digit inside). Apr 23, 2025 · But how does it work, exactly? Are there different types of polystyrene on the market? What sets polystyrene plastic apart from foam? We’ll cover all of that in this guide, along with the pros, cons, and FAQ. It is an excellent electrical insulator and is resistant to chemicals such as acids and bases. It is commonly used in the food service industry for rigid trays and containers, disposable dining utensils, and foamed cups, plates, and bowls. In this article, we provide a comprehensive overview of polystyrene, including its definition, history, production processes, types, key applications, advantages and disadvantages, as well as environmental considerations and future outlook. [5] Polystyrene can be solid or foamed. General-purpose polystyrene is clear, hard, and brittle. It is a thermoplastic polymer, meaning it softens and melts when heated and can be reused. Its forms and properties make it one of the most important polymers used today. zkh9 s2lyfto nlhh10 qvnh3 pyh33a4q fdf4l qwv aoba 8udesy x15