Biaxially Oriented Polystyrene (BOPS/OPS) Sheet is a premium rigid thermoplastic sheet manufactured by biaxially stretching General Purpose Polystyrene (GPPS) resin in both machine direction (MD) and transverse direction (TD) at a precisely controlled temperature. This advanced orientation process rearranges polymer chains into a highly ordered structure, delivering significantly enhanced mechanical, optical and dimensional performance compared to unoriented PS sheets.

1. Exceptional Clarity & Gloss: Light transmittance ≥ 90%, haze < 1.5%, providing crystal-clear visibility to showcase packaged products; high surface gloss enhances shelf appeal.
2. Superior Rigidity & Strength: Tensile strength up to 50–70 MPa, excellent stiffness and surface hardness, allowing for thinner gauge designs while maintaining structural integrity, reducing material cost and weight.
3. Food Safety Compliance: Non-toxic, odorless, free of phthalates/plasticizers. Complies with US FDA 21 CFR and EU 10/2011 food contact regulations, suitable for direct food contact applications.
4. Excellent Printability & Thermoformability: Optimal surface energy for offset, flexo, gravure and digital printing; ideal for positive-pressure thermoforming into clamshells, trays, lids and containers with high dimensional stability.
5. Lightweight & Recyclable: Density of 1.04–1.06 g/cm³; fully recyclable (PS recycling code #6), aligning with global sustainability initiatives.
6. Good Temperature Adaptability: Performs well from -40°C to 85°C, suitable for chilled, frozen and ambient food packaging.