Material Composition | Multi-layer coextruded structure (e.g., PET/PE/PA, PET/EVA, or PA/EVOH/PE) with UV-absorbing/reflective additives (e.g., benzotriazole derivatives, inorganic nanoparticles). | |
UV Resistance | Blocks **>99% of UV radiation (300–400 nm)**; maintains optical/mechanical properties after 2,000+ hours of UV exposure. Additives include red-shifted UVA (e.g., CGL-0139) for long-wave UV blocking. | |
Optical Properties | - Transmittance: **>90% (visible light, 380–780 nm) - Haze**: <5% - Gloss: **≥85%** (60° angle). | |
Barrier Properties | - OTR: ≤5 cm³/m²·day (23°C, 0% RH) - WVTR: ≤2 g/m²·day (38°C, 90% RH). | |
Mechanical Strength | - Tensile Strength: **≥120 MPa (MD), ≥100 MPa (TD) - Elongation at Break**: **≥80% - Puncture Resistance**: **≥25 N**. | |
Thermal Stability | Withstands -40°C to 180°C; suitable for retorting (121°C sterilization) and freezing. | |
Safety & Compliance | Complies with FDA 21 CFR, EU 10/2011, RoHS, and REACH for food/medical contact. | |
Processing Features | - Heat Sealability: 120–180°C (compatible with VFFS/HFFS machines) - Printability: Corona-treated surface for high-resolution flexo/gravure printing. | |