... film, just like BOPET and BOPP material, they have poor heat sealability, but if they can be co-extruded with ... and good pellucidity,glossiness and stiffness itself, so the film is very suitable for the packing goods. And in co-extruded film, the print layer ... strength, suitable frictional coefficient and good flatness, so in high-speed automatic machine, the film can through smoothly.Special ...