Because of its ubiquity in life, printed products are of course of concern to people. Therefore, pollution-free, pollution-free green printing materials have become the focus of attention for people currently choosing printed matter. The water-based varnish has the features of non-toxic, odorless, glossiness and easy to use, making it the darling of the industry and widely used. Let's take a look at the waterborne varnish recipes.
Waterborne Varnish Formula
Water-soluble acrylic resin DRL-03479 60-70
Waterborne amino 797 747 15-20
PM 5
DPM 2
BCS 3
Wetting agent DRL-1140 0.5
Leveling agent DRL-1008 0.5
Anti-stick and slip agent DRL-1044 0.5-1.0
Adhesion promoter DRL-6065 1.5
Flash rust inhibitor DRL-8067 2.0
Thickening thixotropic agent 0.2-0.5
Neutralizer 0.2-0.5
Defoamer DRL-3146 0.5
Deionized water 8-12
Waterborne Varnish Benefits
1) Strong transparency and good gloss
Waterborne Varnish does not affect the color of prints, can withstand long-term strong sunlight color, and is not easy to yellow, discoloration, and can be stored for a long time.
2) High temperature resistance and heat sealing performance
At present, the outer package of cigarette pack generally adopts PP film, while the waterborne varnish has high temperature resistance and good heat sealing performance, so it can also achieve a good heat sealing effect.
3) The finished product has good flatness and anti-rolling force
In the gravure printing, paper curl often occurs, but the use of water-based varnish to soften the package, the product is cut into large sheets, and then hot cut, the flatness of the paper will not be destroyed. This offset printing gravure, especially the need for gold foil bag, to provide a solution to gravure.
4) Strong wear resistance, scratch resistance
Packaging prints are very demanding on wear resistance. Taking cigarette pack printing as an example, the cigarette packs are subjected to a large mechanical load at speeds of up to 300 to 500 packs per minute. The water-based varnish can fully meet the requirements of wear resistance, and there will be no phenomenon of cigarette box discoloration.
5) Conjunctiva fast and dry rapidly
The drying process of water-based varnish is 30% through evaporation, and 70% is absorbed by the material and dried quickly. When the varnish still contains 20% to 30% of moisture, the film can be formed. Therefore, it does not require any drying method. If using infrared or hot air drying method, the drying speed is faster.
6) Safe to use and easy to store
As waterborne varnish uses water as the solvent, it is non-toxic and odorless, and it is safe and reliable to use. It will not pollute the environment and will facilitate safe production. Therefore, it has been widely used in food, medicine, and tobacco packaging.
Waterborne Varnish Usage
Dilution ratio
Since the production processes of printing and packaging companies are not the same, they should be diluted before using water-based varnish. The commonly used dilution is water or a mixture of ethanol and water (generally 1:1 ratio). Dilution according to actual conditions, excessive dilution will affect the gloss and abrasion resistance of waterborne gloss oil, and insufficient dilution will affect the leveling of waterborne gloss oil. Under normal circumstances, the use of coating roller coating can add 5% to 15% thinner, but if the surface of the printed product appears streaks or printing products appear roll paper, you can further add thinner to reduce the viscosity of water-based varnish .
2. Proofing before use
Since some printing and packaging companies use acid inks or inks that are resistant to alcohol and alkalis, printing should be carried out before using waterborne varnish to prevent them from reacting with the ink and causing unnecessary losses.
3. Printing products after powder removal and polishing
For the printing products that need to be lighted, the printing process should be done with as little dusting as possible. It is recommended to polish the surface after removing the powder. This will not only affect the gloss of the printed products, but also affect the adhesion of the waterborne varnish on the surface of the printed product.
Summary: The above is the content of the waterborne varnish recipe introduced by Xiaobian. Hopefully it can help you effectively. If you have any good suggestions, look forward to communicating with Xiaobian. For more information, please pay attention to this website.
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