Packing bag under high temperature and high humidity environment quality problem in the summer, how to break?

Summer high temperature and high humidity environment on the packaging gravure yield relatively obvious, the influence of because of packaging enterprises still is given priority to with solvent-based gravure printing ink, high temperature short quickly evaporate, promote organic solvents in the ink and high humidity and a brief change ink viscosity, thus influencing the quality of packaging gravure. A professional flexible packaging producers packaging would now like to show you understand, have rich experience of packaging production manufacturer in high temperature and high humidity environment is how to do preventive measures in advance, reduce unnecessary losses. One, for shallow network transfer when the environment temperature, the influence of gravure ink in organic solvent evaporation rate will accelerate, if not timely increase dilution solvent in solvent ink to adjust the proportion, or failing to use slow drying solvent, print will present shallow network against white and fine text version of the phenomenon. But it is important to note that dry slow the increase of the solvent should be according to actual circumstances, assuming too much increase will impact the firm the monotony of ink, which in turn can lead to problems such as paint, printing ink solvent residues anti adhesion. Second, the impact on ink drab false dry ink, cieme layer in the table dry stem phenomenon. This phenomenon is easy to lead to adverse, solvent residual paint, ink layer adhesion after winding ink adhesion, etc. Summer is more likely to present false ink dry phenomenon, the main reasons: 1. High temperature causes the ink layer surface solvent evaporation too fast; 2. High humidity caused many moisture in the air into the ink, inhibition of printing ink solvent evaporation rate; 3. Many use slow drying solvent, if the solvent evaporation incomplete, is likely to cause residual, constitute the ink dry phenomenon. Countermeasures: 1. Reasonable drop ink viscosity; 2. Reasonable control printing speed; 3. Scheduling air volume and air temperature of the matching degree; 4. Because of the low speed gravure press drab effect is not very good, flexible packaging enterprises can choose and buy is monotonous performance better gravure press, or to modify existing gravure machine, dry to upgrade ability; 5. Environmental humidity is too high, there are conditions of flexible packaging enterprises respond to the workshop for dehumidification, try to maintain a steady temperature and humidity. Three, to practice shows that the influence of solvent residual, when the environment humidity increases, ink drab speed will slow down. In general, if the environment temperature is 20 ℃, when humidity from 65% to 75%, before and after the ink drab speed can be a difference of 1 ~ 2 times. In addition, most of the flexible packaging enterprises produce gravure in summer will be a lot of the slow drying solvent, such as no benzene ketone in slow dry ink solvent proportion is larger. Especially for low-speed intaglio printing machine, printing function to ensure the printing quality especially shallow network area, it is necessary to add many butyl ester, but the monotony of low-speed gravure press power is low, so it will lead to excessive solvent residue. And about high-speed intaglio printing machine, because the machine speed faster, do not need to add too much slow drying solvents to scheduling ink drab speed, ink viscosity is low at this time, after the transfer of the ink layer thinner, with large air volume and appropriate drying temperature can reach of wicked drying effect. According to high temperature and high humidity environment may constitute the printing quality of the solvent residual violation, flexible packaging gravure enterprises should gas chromatograph make real-time monitoring work, in order to nip in the bud. Four, the impact on the winding in the process of printing quality storage and transfer, assume that the environment temperature is too high or ventilation, is likely to lead to ink adhesion phenomenon, particularly with regard to individual parts after winding tension larger print ( Such as printing pictures more meet bearing) 。 Secondly, high temperature and high humidity environment lead to false high solvent residue, ink dry phenomenon, ink layer of harmful elements such as attached, will aggravate the printing ink after winding anti adhesion phenomenon.