Liquid food basic packaging process

Bag making materials mainly include paper, aluminum foil, plastic film and composite materials of these three. Due to the wide source of packaging materials, light weight, low price, and easy printing, bag sealing, opening and recycling, the products made at the same time There are many kinds of packaging bags, which are light and beautiful, and have good performance of protecting items. Therefore, bag packaging is one of the most important packaging forms of liquid food packaging at present. The so-called bag packing is the process of filling materials into packaging bags made of flexible materials, and then performing exhaust (or inflation), sealing and cutting to complete the packaging process. According to the source of the bag, bagging can be divided into bag making type and bag feeding type. The former has a high degree of automation and complex technical requirements, while the latter is ideal for opening bags with special shapes. According to the overall layout of bagging machinery, it can be divided into vertical and horizontal or straight and rotary. Materials with good fluidity and not easy to pollute the mouth of the bag are often packed in vertical bags. If a variety of materials need to be filled and the mouth of the bag cannot be polluted, horizontal intermittent bagging should be used. Bagged products include small bags of dozens of grams or even a few grams, medium bags of nearly kilograms and large bags of dozens of kilograms. Different materials and different packaging and decoration are used to form different levels of packaging products from low-grade to high-grade to meet the ever-changing market demand. The bagging process of prefabricated plastic pouches is relatively simple. Generally, it is completed by taking the bag, opening the bag mouth, filling and sealing. According to the layout of the bagging machine, it can be divided into rotary and straight-moving multi-station bag opening, filling and sealing. . Its packing speed is 30~45 bags per minute. Because the process is intermittent motion, the speed increase is limited to a certain extent, and the production efficiency is low, so it is not widely used. Due to the high production efficiency, low cost, material saving and one-time completion of bag making, filling and sealing, this bagging technology can reliably ensure packaging quality. And to meet the needs of food hygiene, it has been widely used. According to the overall layout of the bagging machine, the forming bag bagging process can be divided into vertical and horizontal. The product variety and the size of the packaging bag are very wide, which can be used for one-time bag packaging of liquid, semi-fluid and powder materials, and the stand-up bag method can be packaged into four-side sealing bags, three-side sealing bags and pillow bags.