In July 2021, our company held a home party building activity, in order to welcome new employees, to show our team's enthusiasm and unity. Hope the company is developing better and better, welcome customers to consult our polyurethane coating, acrylic emulsionand other resins .

Bubble control is necessary in many industries, such as papermaking, water treatment, pharmaceuticals, dyes and coatings.With the continuous upgrading of national environmental protection regulations and the continuous improvement of residents' environmental awareness, water-based coatings have made great progress.Emulsifying agent and wetting dispersant in waterborne coating formula reduce the surface tension of the system and stabilize the bubbles in the system easily.The existence of bubbles will have a negative effect on the production and coating of coatings.During the grinding process of paint, the "air bag" formed by bubbles around the filler reduces the transfer efficiency of shear force and increases the grinding time.After coating, the residual dry foam on the surface will not only affect the appearance of the coating, but also become the center of corrosion, reducing the durability of the coating.In order to eliminate these problems, almost all waterborne coatings need to add defoaming agent.The active component of defoaming agent can achieve the purpose of defoaming by interfering with and destroying the stabilizing effect of bubbles.Different types of defoaming agents act in different ways, so understanding the mechanism of action of defoaming agents can help to systematically adjust the key physical and chemical parameters, so that the main steps in the mechanism can be controlled to achieve the best defoaming efficiency. 1, the stability of bubbles Water - based coatings in the production process, mechanical mixing is easy to bring air into the system.In the process of coating construction, brush, roller and spray are easy to bring gas into the wet film.Other porous substrates, such as wood panels and cement, release gases into the film as the paint wets and penetrates.The gas brought into the coating system is surrounded by the liquid phase and forms a bubble, and relies on electrostatic action and surface tension gradient to maintain stability. 1.1 Electrostatic Action Water-based coating formula contains a variety of surfactant substances, the special point is that the molecule contains a polar or charged hydrophilic end base and a hydrophobic hydrocarbon chain.This unique molecular structure makes it easy for surface activators to form micelles in a directional arrangement at the gas-liquid interface, as shown in Figure 1, with the hydrophilic end facing the water phase and the hydrophobic end facing the air. Because the density of air is less than the paint, so once the bubble will rise to the paint interface.According to Stokes' law, the bubble rising rate depends on the radius of the bubble and the viscosity of the paint [4].The larger the half diameter of the bubble, the lower the viscosity of the coating, the faster the bubble rise.Microbubbles usually exist in coatings with large specific surface area, resulting in high surface freedom energy.Thermodynamically, microbubbles are so unstable that they spontaneously fuse wit...

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UV plate digital jet painting on glass, ceramics, PMMA applications UV flat-panel digital painting print developing rapidly in recent years. According to the statistics of international authoritative consulting institutions, the annual growth rate of UV wide-format printing in the Chinese market is around 84%. Especially on hard substrates such as glass, ceramics, acrylic, etc., UV flatbed digital inkjet printing has shown great advantages over digital inkjet printers using solvent-based inkjet. However, UV flat-panel digital painting printer in glass, ceramics, acrylic on the further development and some problems need to solve. (1)UV plate digital inkjet market growth UV platform comprehensive UV curing ink print machine with the advantages of the two aspects of digital jet printing technology, represents the development trend of digital jet printing technology, is the key of the print at home and abroad vendors would product development platform of UV spray machine's work efficiency and printing quality is very high, can in a variety of material surface color printing, not only can printing soft material, but also to develop in the direction of diversification, such as in a glass on the wood floor ceiling materials such as ceramics can be printed out beautiful patterns .in 2005, the international authoritative advisory body had predicted,From 2005 to 2010, the average growth rate of UV wide-format inkjet printers around the world reached 68%, among which the Asian growth rate reached 73%. This year, China, which has occupied 50.5% of the Asian market share, will reach the highest average growth rate of 84% UV plate digital inkjet market growth. (2)Market positioning of UV flatbed digital inkjet The success of UV flatbed digital inkjet printing lies in its accurate positioning. In the fierce competition the printing market, competitors of UV flatbed digital inkjet mainly come from two aspects. On the one hand, solvent-based digital inkjet printing will continue to be a huge competitor for UV flat-panel digital inkjet printing because of the low price of printing machinery and consumables. The survey results show that, despite the decline, the market share of solvent-based wide-format inkjet printers is 33.6%, which is three times that of the UV-jet wide-format inkjet printer market share of 11.7%. There is no clear advantage in soft materials and other absorbable hard substrates UV-curable inks, while digital inkjet devices using  (3)solvent-based inks will maintain their current advantages. Screen printing is another competitor of UV flatbed digital inkjet. Unlike digital inkjet printing using solvent-based inks, screen printing can be used for printing a variety of soft and hard materials. However, due to the high cost of plate making, etc., screen printing is only suitable for medium and long version of job printing. UV plate digital inkjet printing complements the traditional screen printing process, not only for small print jobs, ...