Bag in box is made of flexible packaging bag, multilayer thin film sealing tap switch or the suction nozzle and a corrugated box. Packaging bag is composed of a variety of material compound and into, needs to contain liquid and has a barrier, usually choose LDPE/HDPE/LLDPE/VLDPE multilayer composite films, NY/PE data, PET/PE, PET/NY/PE, PET or OPP/AL NMPET/PE or CPP PET, or maybe OPP/AL/NY/PE. These data constitute the bag body resistance, tensile resistance, heat sealing strength can reach the demand, has excellent blocking function of oxygen, water vapor, fragrance; can accept the twists and turns, wrinkle, rub, is not easy because of the external physical factors resulting in the loss and damage of oil and other organic barrier; an excellent solvent, suitable for the high fat content of food and some solvent based fine chemical products packaging; in the natural environment barrier is not affected, the embrittlement of not……

　　Application of bag in box in the wine packaging is more, with the development of packaging technology, structure, style novel, exquisite printing bag in box in the liquor will be of great use.