Release time:2018-03-31 19:49 viewed:0
How strong is water-soluble ink adhesion? With the development of the economy, many people are looking for fast, convenient and simple. So the printing industry also has a simple way to do rapid drying. But still depends on what you choose the ink printing industry, in order to realize the rapid drying, the water-soluble ink is the most common printing ink, ink and color high concentration and non-corrosive expanded its application way, make the water temperature anti-counterfeit printing ink printing quality more apparent temperature the effect is more outstanding, make its adhesion strength is better than in aluminized plastic solvent ink. It is usually done first with ink, then printing solvent ink, which avoids the defects of the latter.
If the surface of the paper material through special closed processing, capillary pores blockage, all ink cannot penetrate, also no riveting force can use, like polyolefin film material, the surface is very smooth and can't absorb ink painting, the original brand of ink is likely to have serious falls off phenomenon. At this moment, through the test, choose appropriate special additives (including pigment dispersant, coupling agent, defoaming agent), they show the strong function of surface activity, greatly reduces the water's surface free energy, make the surface tension of the ink as a whole, is lower than the base material of the critical surface tension, printing ink and it is easier to wetting the backing material, then is spread, and interface. According to lewis acid base theory, the interface force includes van der Waals force and chemical bond force.
The substrate has different surface, the paper material has numerous fiber capillary pore structure, these unspecially treated paper material surface has a lot of holes, can absorb ink. After printing, the ink and surface ink permeate into the fiber to form a kind of embedded mechanical riveting force, which is more difficult to fall off than the base material of plastic film. Riveting machines of the resultant force and the cavity diameter, as the paper material formed by the different varieties of the area of the adhesive interface is different, also directly affect the final speed and depth of infiltration, leading to the difference of adhesion and the difference of the ink film surface gloss and some paper qu torsion deformation.
If the surface of the paper material through special closed processing, capillary pores blockage, all ink cannot penetrate, also no riveting force can use, like polyolefin film material, the surface is very smooth and can't absorb ink painting, the original brand of ink is likely to have serious falls off phenomenon. At this moment, through the test, choose appropriate special additives (including pigment dispersant, coupling agent, defoaming agent), they show the strong function of surface activity, greatly reduces the water's surface free energy, make the surface tension of the ink as a whole, is lower than the base material of the critical surface tension, printing ink and it is easier to wetting the backing material, then is spread, and interface. According to lewis acid-base theory, interface force including van der Waals force and chemical bonding force, the formation of chemical bond on the largest contribution to the adhesion, generally covalent bonding force is 100 ~ 1000 kj/mol, and van der Waals force and hydrogen bond is generally not more than 50 kj/mol. The use of coupling agent facilitates the formation of chemical bonds and improves the ability to adapt to the environment. Everyone speak benzene kind of harmful organic solvent, but have never heard someone said benzene class organic solvents, so the alcohol soluble ink instead of the low VOC emissions of benzene solvent ink, also conducive to environmental protection, in the process of plastic film gravure will be a wide range of applications. Ink painting as a result, we research is in the absence of benzene solvents and other organic solvents existing conditions, try to reduce the surface tension of the ink, only good wettability, can infiltrate surface of substrates, shows good adhesion, flow flat and dry. Is not only is the material for paper also is still the first infiltrates surface and then subsequently spread to the internal, can form mechanical riveting force or chemical reaction, in appearance form flat light bright beautiful ink layer.
With the rapid development of simple and efficient flexographic printing technology and processing production line, the manufacture of ink and ink and ink printing will have a broader development market. For example, corrugated box printing, paper bag, paper cup, paper box printing, newspaper printing, decorative printing and so on. However, in terms of the quantity of ink and ink printing, water-based gloss oil is much larger than the amount of water-based ink, which is related to the high price of water-based color ink. Uv glazing oil prices are higher than that of waterborne glazing oil, but the printing quality high gloss, excellent physical and chemical mechanical performance and decorative effect make it occupy a certain market share, water-based color is slightly higher price also makes sense, because the color pigment concentration is high, choose new material slightly higher price. And the development design product needs to invest manpower and time, consume more scientific research funds, also should be compensated. From the ink manufacturer, the quality of the customer's printed matter has always been the first research and development to create a glorious mission. Generally, the quality of environmental friendly ink should meet the above requirements.