High temperature sterilization stand-up pouch printing skills

High temperature sterilization stand-up pouch printing skills

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Stand-up pouches are "standing" into the customer's sight. Based on market shelf factors, the upright pouch delivers product information more prominently. Faster, its unique packaging ideas make it stand out among thousands of products. Because the standing bag makes the storage space more relaxed and more convenient to find, it is very popular among consumers.

    The PET film is thin and easy to wrinkle, so it requires a large tension during printing, and a special ink resistant to high temperature cooking is required, and it is necessary to always pay attention to whether the film is static. PET film is easy to produce large static electricity, which leads to quality problems such as blocking, ink dot and knife line during printing. In addition to the conventional static elimination method, it is an effective method to strengthen the temperature and humidity control of the workshop.

    NY is the most difficult material to print, it is easy to absorb moisture and the tension is extremely unstable. Therefore, the packaging film can not be damaged when it is not printed; it is necessary to pay attention to the test environment humidity before printing, it is best to take dehumidification measures; print immediately after opening the packaging film, and can not ignore a process - preheating, preheating temperature control at 50 —80~C, without preheating equipment, the printing equipment can be flexibly used, and the first color group can be vacated as a preheating device; the tension should be appropriately reduced during the printing process; after printing, it must be sealed and put into the curing chamber for curing 2 - 3 days, then compound 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. Includes viscosity. Adjustment of color density. Viscosity auto adjuster adjustment is available to increase work efficiency. The regulator can add solvent according to a preset value to keep the viscosity of the ink unchanged. However, the color concentration of the ink should not be treated with a solvent; in the light, it should be adjusted with a special medium;

    (2) Closely monitor the effects of active particles. When printed for a certain period of time, the ink will produce a lot of reactive groups, which will combine with the chromium ions of the gravure cylinder. When these combinations appear in the shallow part of the gradation plate, the bonding force will hinder the transfer of the ink. Causing blocking. Flowering point. Therefore, manufacturers should not worry about the cost at this time, and can add an appropriate amount of activity slowing agent CHY-1 type adjuvant.

    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) Upright zipper bags designed for the food industry can be packaged in cereals. Vegetables, pasta. Candy, fruit, fruit, drink. Tea, spices, seasonings. Frozen meat, frozen food, coffee, sugar. lotus root starch. Powdered food such as sesame paste. Common materials are constructed as: OPP/CPP, P[lower/VMPET/LLDPE. OPP/PET/P [, PET/PE, PET/PE, OPP/LLDPEE, etc.

    (2) The vertical zipper bag designed for chemical and daily chemical industry can pack all kinds of lotion products, such as: laundry detergent, shower gel, shampoo and detergent. Common material structures are: PET/VMPET/PI (multilayer coextrusion), PET/AL/PC (multilayer coextrusion) and the like.

    (3) The body zipper bag designed for the electronics industry can be packaged with computer color printing powder. Copiers, charcoal powder and iron powder, and electronic parts. Common materials are constructed as: PET/AL/CPE.

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