Well-known soft packing factory production the whole process of high temperature cooking bags

The whole process of production of high temperature cooking bags, from print manuscript preparation, to the printing process, composite process, key control points to the bag making process these a few respects to explain. Printed copy & ndash; — Printing articles mainly consider the color gradient, writing requirements, stamping, overprint, drag the white and the limit on production equipment, production process requirement, still need to further consider the following two points: one is the design of high temperature cooking bags had better not full version, heat sealing side best designed to be transparent. Secondly, the design with concise advisable, chromatic number not easy too much. On the one hand, in order to improve the heat sealing strength, on the other hand is to reduce the influence of the ink, the ink is often added in the curing agent, to reduce the cost, but cannot be recycled. Printing process & ndash; — One is using polyurethane ink to printing, such as cooking temperature over 121 ℃, should add a certain proportion of curing agent, adding ink temperature resistance; 2 it is printing tension is formulated according to the special printing tension table to order; 3 it is best when printing preheating dehumidification, printed after the idling 1 to 2 color heating drying. After the printing immediately sealed moisture-proof packaging. Composite process & ndash; — One is to use high temperature resistant special cooking glue for thinner, water content of ethyl acetate is demanding, at least using industrial grade one. In addition to the complex environment demand is high, the humidity must be smaller than 85%; The second is in the composite is the key of retort pouch production working procedure, composite equipment status directly affect the quality of the high temperature cooking bags again. So before production of retort pouch carefully deal with composite machine maintenance; 3 it is to cure according to the properties of the adhesive, temperature is in commonly 50 ~ 60 ℃, time of at least 72 h, suggest adhesive manufacturer in strict accordance with the requirements of curing time, make sure fully cure. Some glue require compound for the first time to cure 6 ~ 12 h recombination, to attract attention. Bag making process & ndash; — Bag lining CPP resin fusion process, the sealing quality is one of the important indicators of high temperature cooking bags, bag should control the following points: one is equipment maintenance, heat sealing pressure zero defect, bright and clean. Hot knife temperature uniformity, high temperature cloth clean level off, cooling blade cooling water flow. Hot knife inside edge. Second, adjusting the temperature, pressure and velocity, heat sealing temperature cannot treat as the same, generally between 180 ~ 230 ℃, and the composite membrane layer, thickness, hot knife and other Associated Press times; Third, from time to time to check the sealing condition, avoiding stress and seal the appearance of wrinkles, bubble.