What is a printing defoamer?

According to our country, there were 105,000 enterprisesthe printing3.394were engaged in it. It’s not surprising, and a lot of foam will seriously affect the printed products and work progress. In order to avoid these troubles, printing will use printing defoamer. Medium lather. In this issue, the editor will explain this defoamer to you.

  Why do bubbles appear during the printing process

  1. The printing foaming problem in the offset printing process is a common process failure. The reason for the printing foaming is that the peeling force when the ink on the blanket is transferred to the paper is greater than the bonding strength between the paper layers.

  2. The viscosity of the ink refers to the force that prevents the separation of the ink film when the ink film is separated. Usually, the ink viscosity needs to reach a certain standard to ensure effective transfer and anti-emulsification performance, but it can often cause paper foaming and delamination if it is too large, resulting in the appearance of foam.

  3. Usually, the temperature of the ink factory is 23±2°C when the ink viscosity test is performed, and a certain speed is set. When the temperature is lowered, the fluidity of the ink becomes worse and the viscosity becomes larger; similarly, when the printing speed is increased, especially under high-speed printing conditions, the viscosity of the ink also becomes larger, and foam is generated during these processes.

  What are the hazards of foam in the printing process?

  The appearance of foam during the printing process will not only affect the construction process, but also slow down the construction progress and affect the construction efficiency. At the same time, this will undoubtedly increase unnecessary construction costs; too much foam will cause damage to the printing quality and the appearance of the finished product. Impact; too much foam will have a certain impact on the surrounding environment; too much foam will greatly increase the production cost and defoaming cost of the printing factory

  The characteristics and scope of application of printing defoamer

  The printing defoamer is compounded with modified polyether through a special process. It is easy to dissolve in water and is suitable for defoaming in oil-phase foaming systems. The product has good stability; it has good compatibility with organic hydrocarbons. Adding oily system does not affect product transparency; leveling performance. Printing defoamer that can be used in various harsh systems in a wide temperature range Applicable to water-based coatings, inks, inks, varnishes, leather edge oils, paper coatings, laminating adhesives, latex paints, adhesives, Polyvinyl alcohol, and other systems that cannot use silicone defoamers can be added directly as a stock solution, or in batches, half of which is added during the grinding stage, and the foam is generated, and the other half is added during the let-down stage.