A large number of multi-functional composite films have been developed abroad to further refine their functions. For example: cold film resistant to -18 DEG and -20 DEG C, -35 low temperature environment; dampproof moistureproof processing made of PP films, the series of products can be divided into moisture-proof, anti cold, anti condensation, steam adjustable water types; anticorrosive film packaging perishable, acidity and sweetness large food; friction film stacking stability; special PE thin film chemical resistance, corrosion resistance; film added no smell moth repellents; instead of biaxially oriented nylon 6 food packaging to the heat resistant film biaxially oriented nylon 66, the high temperature of 140 DEG C; new special food packaging film can improve the incense food packaging; non crystalline nylon film transparency similar to glass; high shielding film can color, smell and taste, nutritional index and stability of taste quality; metal protective film modified by LDPE film packaging of liquid products, in the environment of low temperature heat sealing; PP synthetic paper is used to improve the light resistance, cold resistance, heat resistance, water resistance, moisture resistance, grease resistance, acid resistance, alkali resistance and impact resistance of the package.
At present, foreign popular plastic cups, composite cup (outer PSP, inner layer PP, cover PS) packaging cold, hot drinks, wine, convenience foods. France uses PE bottles to pack fructose and yogurt, and Germany uses PC bottles to pack milk. Our country uses PE bottles to pack medicines and so on.