Selection of printing ink for self standing bag and boiling bag
Polyurethane special inks are generally used for nylon film printing: 1) benzene free and ketone free series; 2) benzene free and ketone free series.
When selecting printing ink, pay attention to:
① For example, the color of a polyurethane ink, such as f1200 red, 1500 red, f1150 red, f2610 gold red, f3700 orange, f4700 medium yellow and other colors of a polyurethane ink, it is indicated in the instruction manual that it can not be used for boiling film printing of BOPA / PE structure. Some colors are not resistant to boiling, and pigment exudation is easy to appear when boiling.
② Gold and silver ink should be used with caution. For gold and silver ink, Zili bag factory does not recommend the use of boiling in the manual. However, some boiled bags on the market use gold and silver color color. The general practice is to consult the ink factory for formula design before application, and pay attention not to print with large color blocks.
③ For nylon film to have a good ink adhesion fastness, so as to ensure the final peeling strength of the ink position.
Self supporting bag to expand knowledge: soft PVC film contains a lot of plasticizers, which will precipitate into the ink layer, resulting in discoloration, adhesion and ink migration and other faults. Due to the plasticizer precipitation is a slow process, so the choice of ink to be appropriate, do not choose rigid PVC ink. soft
High quality PVC film is easy to stretch, difficult to register and adjust, and easy to stretch after heating. Therefore, it is necessary to reduce the drying temperature and control the tension. At the same time, large roller printing machine is selected to ensure the registration accuracy. www.dgbpk.com/
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