Process flow of food cooking bag

Food cooking bag is a kind of composite plastic film bag that can be heated. It has the advantages of both can container and boiling water resistant plastic bag. The food can be left intact in the bag, sterilized and heated at high temperature, and then taken out to be edible. Today, the cooking bag manufacturer will introduce the processing technology of food cooking bags (g ō Ng y) process, so that everyone can better understand the food cooking bag.

At present, most of the cooking bags produced by Nowadays are made by dry compounding method, and a few can also be made by solvent-free compounding method or co-extrusion compounding method. High-temperature cooking bag is a composite plastic film bag that can be heated. It has the advantages of both can container and boiling water resistant plastic bag. The food cooking bag is convenient to use. The food cooking bag can be opened conveniently and safely. When eating, put the food together with the bag into boiling water and heat it for 5min, and then open it for eating, or even eat it without heating. The quality of dry composite is higher than that of solvent-free composite, and the arrangement and combination of materials is also more reasonable and extensive than that of co-extrusion composite, and the use is more reliable.

First of all, the selection of materials should be based on the Z end use of the cooking bag to determine which base materials to use, how to combine, and what kind of oil ink and adhesive to use. The so-called Z end use refers to the nature of the food to be packaged in the bag, and the weight of the package. After packaging, how high temperature (121 ℃, 128 packages) to withstand, so that the packaging bag has a reasonable cost performance ratio, so it is important to understand the Z end use. Next, determine the process (g ō Ng y) parameter. After determining the base material and auxiliary materials, you can place orders to the workshop for production. As the technical management and operator of workshop production, you must strictly follow the requirements of the process sheet to collect and prepare the feed.

Then, in the specific operation, the process (g ō Ng y) Single process parameters, including the number of lines and dot depth of the gluing roller, the concentration of the operating glue, and the heating of each drying channel (ji ā  The temperature of section r è), the air blowing volume (definition: the air flow volume per unit time), the size of the exhaust air volume at the sub-outlet, the speed of starting up, the control of unwinding tension, drying tunnel tension, winding tension, the surface temperature of the composite steel roll and the composite pressure, etc. Among the above process parameters, the requirements for the amount of glue (demand) and the amount of residual solvent are the key to improve the internal quality of the cooking bag (explanation: an important part of things), It must be taken seriously. High-temperature cooking bag food can be left intact in the bag, sterilized and heated at high temperature (generally 120~135 ℃), and then taken out for consumption. After more than ten years of use, it has proved to be an ideal sales packaging container. It is suitable for the packaging of meat and bean products, which is convenient, sanitary and practical, and can well maintain the original flavor of food, which is favored by consumers.

Third, in the specific composite operation, some adhesive suppliers require that the second layer (PET/AL or OPA/AL) be placed in the curing room at 50~55 ℃ for 4h or 12h before the second third layer (PET/AL/CPP or PET/AL/OPA) is compounded. Each time the composite is completed, there must be this process (gu 242; ch é ng), but there are also many adhesive penalties that can be completed in one go, It was only put into the ripening room at 50~55 ℃ to let it ripen. The latter kind of adhesive is beneficial to production management and labor productivity.

The fourth is curing. The curing temperature and curing time are generally required to be kept at 50~55 ℃ for more than 48 hours, Z is good for 72 hours, but some adhesives are required to be kept for 15~7 days. This must be done according to the requirements of the product instructions of various crystal models. Z should avoid too low temperature and too short curing time in the curing room. The temperature in the curing room should be maintained to the same point by ventilation and flow, and the indoor air should also be properly replaced, Discharge the residual solvent released during ripening to the outside (sh ì w à i), and supplement (b ǔ  ch ō Ng) Clean and fresh fresh air, which is conducive to reducing the amount of residual solvents and impurities in the compound and improving the product quality

The fifth is to test the bag making. After the compound is matured, the composite fastness and residual solvent (properties: transparent, colorless liquid) quantity between layers should be tested first. After the data meet the requirements, they can be taken out and taken to make the bag. The composite film is used as an empty bag for cooking bags. Most of them are made into flat bags or self-supporting bags with three side seals, and few are made into the shape of middle seam (back seal) bags. Different structures, different combinations, and different layers of composite film, The heat sealing strength is different, which can be 45~80N/15mm. For the composite film with different structure combinations and different layers, the heat sealing bag making process (g ō Ng y) The parameter should also be different.