Based on the factors of market shelves, standing bags are more eye-catching and faster due to the transmission of product information, and their distinctive packaging ideas make them stand out in thousands of products.
Due to the upright bag, the storage space is more relaxed and easier to find. Therefore, it is highly favored by consumers, and the high-temperature sterilization upright bag is favored by consumers.
So what's so clever about the printing process of the pasteurized stand-up pouch? This is the focus of the soft packaging manufacturer's focus.
There are three kinds of material structures commonly used in high-temperature sterilization stand bags: PET12/NYl5/AL7/RCPP70, PET12/AL7/RC PP70, NY15/EVOHl5/RCPP70, and the printing layer is PET, NY.
The PET film is thin and easy to wrinkle. Therefore, it needs a large tension during printing, and a special ink resistant to high temperature cooking is selected, and it is necessary to always pay attention to whether the film is electrostatic. PET film easily produces large static electricity. Lead to printing block, ink, knife line and other quality problems. 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. It is easy to absorb moisture, and the tension is extremely unstable. Therefore, the packaging film must not be damaged when it is not printed; the humidity of the test environment should be taken into account before printing; it is best to print immediately after opening the packaging film with dehumidification measures. At the same time, one process can not be ignored - preheating, preheating temperature control at 50 ~ 80 °C, no preheating equipment can be flexibly used in printing equipment, the first color group can be vacated as preheating device; the tension during the printing process should be properly reduced; after printing, it must be sealed and put into curing room for aging 2～3. Days, compounded 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 printing ink suitability. Including viscosity, color concentration adjustment. Viscosity automatic regulator can be used to adjust to improve work efficiency. The regulator can add the solvent according to the preset value to keep the viscosity of the ink unchanged. However, the color concentration of the ink should not be diluted with a solvent, use a special diluting agent to adjust.
(2) Closely monitor the effect of active particles. After a certain time of printing, the ink will produce many reactive groups, these groups will be combined with the chromium ion of the gravure cylinder. When these conjugates appear in the shallow part of the graded version, their binding force will hinder the transfer of the ink. Causes blockage and flowering. Therefore, manufacturers should not worry about the cost at this time, can add an appropriate amount of activity slowing agent CHY-1 type adjuvant.
The combination of different materials determines the different uses of upright zipper bags to meet the packaging needs of various items:
(1) Upright zipper bags designed specifically for the food industry can pack cereals, vegetables, pasta, candies, and dried fruits. Fruits, beverages, tea, spices, seasonings, frozen meats, frozen foods, and coffee, powdered foods such as sugar, lotus root starch, and sesame paste. Commonly used material constructions are: 0PP/CPP, PET/VMPET/LLDPE, OPP/PET/PE, PET/PE, OPP/LLDPE, and the like.
(2) Upright zipper bags designed for chemical industry and daily-use chemical industry can pack all kinds of lotion products, such as laundry detergent, shower gel, shampoo and detergent. Commonly used material structure: PET/VMPET/PE (multi-layer co-extrusion), PET/AL/PE (multi-layer co-extrusion) and so on.
(3) Enterprise zipper bags designed specifically for the electronics industry can be packaged with computer color printing powder, copier toner and iron powder, and electronic components. Commonly used materials are: PET/AL/CPE.
