Recyclable PET protective film is made of the CPP aluminium metalizing substrate film metalized in vacuum metalizing machine. It is usually divided into low temperature VMCPP, ultra-low temperature gas-filled VMCPP, high bonding strength VMCPP, low friction VMCPP corresponding to different functional applications. As heat sealing inner layer, VMCPP film is laminated with BOPP, BOPA, BOPET and other materials for bag making. It is suitable for various kinds of food, medicine and cosmetics packaging.   Protective Film Characteristic: *Good barrier performance *Excellent light-shading performance *Excellent glossy appearance of aluminium metalizing layer,excellent foil ability to ink colour. *Good laminating adaptability *Excellent heat sealing strength Physical and Mechanical Properties Item Name Standard Value Typical Index Testing Standard Low temp Ultra-low Temp & Inflatable High BondingStrength Low Friction Tensile Strength Mpa MD â?¥35 59 59 59 59 ASTM D638 TD â?¥25 38 38 38 38 Elongation at Break % MD â?¥280 649 649 649 649 TD â?¥380 813 813 813 813 Thickness of Aluminum Layer  Î©/ â?¤2.5 1.8 1.8 1.8 1.8 ASTM D1003 Aluminum Layer Uniformity % ±15% ±8% ±8% ±8% ±8% Bonding Strength of Aluminum Layer N    (EAA Film Test upper seal knife 110, Lower seal knife 80) Customized 1.2-2.5 Heat Sealing Temperature   (Non-treatment surface) Heat Sealing Type â?¤145 122(â?¥8N) 114(â?¥8N) 122(â?¥8N) 122(â?¥8N) Non-Sealing Type >145 Surface Tension dyn/cm Treatment Surface â?¥38 â?¥38 â?¥38 â?¥38 â?¥38 ISO 8296 Non-treatmentSurface