Printing of high temperature sterilization upright bags
upright bags are "standing" in the eyes of customers. Based on the factors of market shelves, upright bags convey more eye-catching product information. Faster, its unique packaging creativity makes it stand out from thousands of goods. Because the upright bag makes the storage space looser and the search more convenient, it is loved by consumers
pet film is thin and easy to wrinkle, so 1. Input parameter: frequency (Hz); Maximum stress (n); Minimum stress (n); The initial running speed (V0) of the instrument requires a large tension during printing, and special inks resistant to high temperature cooking should be selected, and attention should be paid to whether the film has static electricity at all times. PET film is prone to generate large static electricity, which leads to quality problems such as blocking, ink dots, knife lines, etc. in addition to the conventional methods of eliminating static electricity, it is an effective way to strengthen the temperature and humidity control in the workshop
ny is the most difficult material to print, easy to absorb moisture and deform, and the tension is extremely unstable. Therefore, the packaging film cannot be damaged before printing; Pay attention to test the environmental humidity before printing, and it is best to take dehumidification measures; Print immediately after opening the packaging film. At the same time, one process cannot be ignored - preheating. The preheating temperature is controlled at 50-80~c. without preheating equipment, the printing equipment can be used flexibly, and the first color group can be empty as the preheating device; The tension should be properly reduced in the printing process; After printing, it must be sealed and packed, put in the curing room for curing for 2-3 days, and then compound as soon as possible
whether printing pet or NY, the control focus is ink. It mainly includes the following two aspects
(1) adjustment of ink printability. Including viscosity. Adjustment of color concentration. Automatic viscosity regulator can be selected 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 concentration of ink should not be reduced by solvent; Medium light, special ones should be used; Medium light agent
(2) closely monitor the influence of active particles. When printing for a certain period of time, the ink will produce many active groups, which will combine with the chromium ion of the gravure cylinder. When these complexes appear in the shallow part of the gradient plate, their binding force will hinder the transfer of the ink, resulting in blocking. Starting point. Therefore, the manufacturer must not worry about the cost at this time, and can add an appropriate amount of activity slowing agent CHY-1 adjuvant
the combination of different materials determines the different uses of vertical zipper bags 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 grains, vegetables and pasta. Candy, Qianguo, Liangguo, beverage. Tea, spices, seasonings. Frozen meat, quick-frozen food, coffee, sugar and lotus root powder. Sesame paste and other powdery food. Common material structures are: OPP/CPP P[lower/VMPET/lldpe.opp/PET/p[, PET/PE, pet/pe, opp/lldpee, etc.
(2) the test method of Jinan test gold gate Brinell hardness tester is chemical industry and daily chemical industry. The vertical zipper bag designed can pack all kinds of detergent products, such as laundry detergent, shower gel, shampoo, detergent. The common material structures are: PET/VMPET/PI (multi-layer coextrusion), PET/Al/PC (multi-layer coextrusion), etc.
(3) Specially designed for the electronic industry, the enterprise zipper bag can pack computer color printing powder. Copier, carbon powder, iron powder and electronic parts. The commonly used material structure is: PET/Al/CPE, etc
since the above materials do not exceed the requirements of high-temperature sterilization, it is not difficult to control printing
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