High-temperature sterilization upright bag printing skills

The upright bag "stands" into the customer's line of sight. Based on the factors of the market shelf, the upright bag conveys product information more eye-catching. Faster, its unique packaging ideas make it stand out among thousands of commodities. Because the upright bag makes the storage space more relaxed and easier to find, it is very popular with consumers.

PET film is thin and easy to wrinkle, so it needs a lot of tension when printing, and special inks that are resistant to high temperature cooking should be selected, and always pay attention to whether the film is static. PET film is prone to generate large static electricity, which leads to quality problems such as blocking, ink dots, and knife lines during printing. In addition to the conventional method of removing static electricity, strengthening the temperature and humidity control of the workshop is an effective method.

NY is the most difficult material to print, easy to absorb moisture and deform, and the tension is extremely unstable. Therefore, the packaging film can not be damaged when not printed; the environmental humidity should be tested before printing, and it is best to take dehumidification measures; print immediately after opening the packaging film, and at the same time can not ignore a process-preheating, preheating temperature control at 50 —80 ~ C, no preheating equipment, flexible use of printing equipment, the first color group can be used as a preheating device; the tension should be properly reduced during the printing process; after printing, the package must be sealed and placed in the curing room for curing 2 -3 days, then recombine as soon as possible.

Whether printing PET or printing NY, the focus of control is ink. It mainly includes the following two aspects.

(1) Adjustment of ink printing suitability. Including viscosity. Adjustment of color density. Can be adjusted with an automatic viscosity adjuster to improve work efficiency. The regulator can add solvent according to the preset value to keep the viscosity of the ink unchanged. However, the color density of the ink should never be used with solvents; medium light, use special; light medium to adjust.

(2) Strictly monitor the influence of active particles. After printing for a certain period of time, the ink will produce many active groups, these groups will combine with the chromium ions of the gravure cylinder, when these combinations appear in the shallow part of the gradient plate, their binding force will hinder the transfer of ink Cause blockage. Start with flowers. Therefore, the manufacturer must not worry about the cost at this time, and can add an appropriate amount of the activity retarder CHY-1 auxiliary agent.

The combination of different materials determines the different uses of the upright zipper bag to meet the packaging needs of various items. The following is an example.

(1) The upright zipper bag specially designed for the food industry can pack grain. Vegetables, pasta. Sweets, thousand fruits, cold fruits, drinks. Tea, spices, seasonings. Frozen meat, quick-frozen food, coffee, sugar. lotus root starch. Powdered food such as sesame paste. Commonly used materials are constructed as: OPP / CPP, P [下 / VMPET / LLDPE. OPP / PET / P [, PET / PE, PET / PE, OPP / LLDPEE, etc.

(2) The upright zipper bag specially designed for chemical industry and daily-use chemical industry can pack all kinds of detergent products, such as: laundry detergent, shower gel, shampoo, detergent. Commonly used material structures are: PET / VMPET / PI (multilayer coextrusion), PET / AL / PC (multilayer coextrusion), etc.

(3) The corporate zipper bag specially designed for the electronics industry can pack computer color printing powder. Copier, charcoal and iron powder, electronic parts, etc. Commonly used materials are constructed as: PET / AL / CPE, etc.

Since the above materials do not exceed the requirements of high temperature sterilization, printing control is not difficult.

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