Roller coating test method is very close to the actualcoating construction conditions, so that different defoamers can distinguishthe role played by. Youcan even try out the amount of added. In the roller coating test, a porous sponge roller pad, the 40grams of paint on the substrate is not adsorbed, can be a dedicated test cardcan also be other standardized test paper jam. The total coating area was 500 cm2. Before each test, therollers were wetted with the same amount of water to ensure reprod ...

The flow-through test can be used to evaluate thecompatibility and defoaming effect of the defoamer with the coating systembeing tested. The samplesubjected to the stirring test was immediately poured onto a polyester film. Polyester film to be placed in avertical tilt angle of 25 degrees on the frame. Carefully observe the flow smears, showing the presence ofbubbles. The method canalso evaluate the defoaming effect of the defoamer by observing the dry film. In some cases, extremely high levels ...

The effectiveness of defoamers must first be determined inthe laboratory. Itis not advisable to transfer lab test results to production scale withoutfurther testing. Ourwork in the test method developed, combined with the paint manufacturing andconstruction process conditions, the defoamer Gongjiao evaluation is feasible. Different test methods can be selectedaccording to different construction conditions (such as brushing, spraying,dipping, printing, etc.).Stirring testFor our users, the simple ...

The amount and effectiveness of thedefoamer depends on the formulation system of the coating or ink, in particularthe type of polymer, the pH, the amount of pigment used, and the chemicalstructure of the other adjuvants used. Similarly, the manufacturing process and construction process onthe type and amount of defoamers are also required.The addition of a method to distinguishdefoamer products from defoamer emulsions and defoamer concentrates isdiscussed. Defoamers Emulsiondroplets of emulsion ...

For aqueous systems, the largest of twotypes of anti-foaming agent is a hydrocarbon oil (mineral oil) class andsilicones. Traditionally,aromatic and aliphatic petroleum derivatives are used as anti-foaming agent inthe composition of the active substance distribution. Early on, the aromatic oil is widely use. But its dangers to healthand the environment hinder their application. Toxicity of aliphatic oil is small, but in an aqueous medium lowcompatibility of the high gloss coating can cause serio ...

Current theories about the formation ofanti-foaming and foam degassing is different. Defoamers the role of the air trapped in the interface. Defoaming agent role in the process andthe coated film after coating is completed, so that the coating film dispersedin the tiny air (microbubbles), rapid rise to the surface. But the practical application is oftennot clearly make this distinction. Defoamers also can eliminate microbubbles tosome extent. Defoamersdefoaming mechanism discussed below in water ...

It can be defined as the foam of air bubbles in aliquid medium in a stable dispersion. If the general air into the liquid, thebubble generated can assume a spherical shape. Since the air is lessdense than the liquid, and thus it will migrate to the surface, when the gasreaches the surface of the liquid without surfactant, the bubble will burst, theair inside the bubble dissipates, the liquid surrounding the bubble in theprevious and together. Thus, the pure liquid (liquid containing nosurfactant ...

In many inks and coatings processingproduction process, the need to use surface-active substances to achievespecial effects. Forexample, in the production of water-based paint, water-insoluble base materialproduction, water-insoluble base material is required to deal with the use ofemulsifiers. At the same time,we have to improve substrate wetting and coating pigment dispersion by usingadditives.Surfactant most importantcharacteristic is that they have a tendency to build in the interface, such ...

Organic silicon antifouling paint has asmooth surface, marine life is difficult in the above attachment, even if notfirmly attached, in water or other external force is very easy to fall off. Studieshave shown that the surface coating can be less than a 12 X10 N / m, in orderto effectively prevent the attachment of marine organisms.

In the present, all "three"paint, elastoplastic silicone "three" best overall performancecoatings, having a room temperature or low temperature curing, construction andconvenient features. After curing adhesive coating both flexibility, but alsothe smooth transparent surface, and resistant to high and low impact,high-frequency dielectric properties, excellent "three" performance,etc., can meet the whole high and low frequencies and protective coating hybridcircuit. ...