Papers by Author: De Ping Zhao

Abstract: To improve scratch-resistance and abrasion-resistance of water-based varnish, change the type of water-based resin, the type and content of wax emulsion and flow agent, then test scratch-resistance and abrasion-resistance of water-based varnish. The results show that resin and wax emulsion has a great influence on the scratch-resistance and abrasion-resistance of water-based varnish. Adding appropriate amount of wax emulsion can improve scratch-resistance and abrasion-resistance to some extent. Adding flow agent has certain influence on scratch-resistance of water-based varnish.

Abstract: Water-based varnish is prone to generate a lot of bubbles when it is processed or used. The bubbles can cause coating defects during coating, so the film quality is not very well. Adding defoamer in varnish can quickly eliminate the bubbles. Changing the type and amount of the defoamer prepared varnish and tested its defoaming properties to discussion the influence of defoamer on defoaming properties of water-based varnish. The results show that the performance of different defoamers defoaming is different, and Foamex 810 has the best defoaming properties. The amount of adding defoamer impacts defoaming properties to a certain extent. When water-based varnish added Foamex 810 with the amount of 1% in, the defoaming efficiency comes to the peak 96%.

Abstract: The glossiness is an important indicator of evaluation polishing printed matter. The water-soluble varnish consisting of different content and kinds of promoter is prepared. Then proofs are coating by wire rods. Measuring glossiness of proofs, we analyze the influence of promoter on glossiness of water-soluble varnish. The results show that adding cosolvent, substrate wetting agent, flow agent, wax emulsion and other promoter in water-soluble varnish can improve the glossiness of water-soluble varnish film. When cosolvent ethanol was adding to 3%, the film glossiness achieves about 80 and adding a small amount of wax emulsion, flow agents, the film glossiness can be increased about 10%.