Overview
High-strength PS plastic, a modified form of polystyrene, combines the rigidity of general-purpose PS with enhanced impact resistance. This is achieved by incorporating rubber additives (e.g., polybutadiene) during polymerization. It retains the ease of molding and cost-effectiveness of standard PS while addressing brittleness limitations. Commonly processed via injection molding or extrusion, it is favored for applications requiring structural integrity and lightweight properties. Unlike expanded polystyrene (EPS), high-strength PS is solid and non-foamed, making it suitable for load-bearing parts.
Physical and Chemical Properties
High-strength PS exhibits a tensile strength of 30–50 MPa and a flexural modulus of 2–3 GPa, outperforming standard PS in mechanical durability. Its Vicat softening temperature ranges from 90–100°C, ensuring stability in moderate heat environments. Chemically, it resists water, alcohols, and dilute acids but is attacked by ketones and esters. The material’s opacity and surface gloss can be adjusted with pigments or matting agents. Its electrical insulation properties make it useful for electronic components.
Main Applications
In the automotive sector, high-strength PS is used for interior trim, glove compartments, and mirror housings due to its lightweight and crash resistance. Electronics manufacturers employ it for TV bezels, printer casings, and keyboard frames. The packaging industry utilizes it for clamshell containers and cosmetic cases, where clarity and toughness are required. Medical applications include disposable trays and diagnostic device housings, leveraging its sterilizability and compliance with ISO 10993 standards.
Safety and Storage
While non-toxic in solid form, high-strength PS releases styrene monomers when heated above 200°C, requiring adequate ventilation during processing. Dust inhalation should be minimized by using particulate filters. Storage recommendations include keeping the material in sealed bags to prevent moisture absorption (max. 0.1% moisture content for optimal processing). Avoid contact with strong oxidizers like nitric acid, which can degrade the polymer.
B2B Procurement Guide
Buyers should specify requirements such as impact strength (e.g., Izod impact values), flame retardancy (UL94 ratings), and color consistency. For food-contact applications, FDA or EU 10/2011 compliance is mandatory. Suppliers often provide pellets in 25-kg bags or bulk containers. MOQs typically start at 1 metric ton, with prices varying by additives (e.g., UV stabilizers for outdoor use). Lead times range from 2–6 weeks for custom formulations.
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