Application analysis of screen printing ink defoamer

Screen printing ink is a kind of ink specially used for screen printing. In order to solve the foam problem, screen printing ink defoamer is often used. This is a chemical that destabilizes foam and promotes its elimination and can be added to the ink production process.

In the production process of screen printing ink, there are usually mixing and grinding, filtration, color mixing and conditioning, packaging and storage. Among them, the most prone to foaming is usually the mixing and grinding and stirring stages. This is because in these links, the ink undergoes stirring, vibration and violent physical movement, which will cause air to be stirred into the ink to form foam.

Excessive foam can cause the following problems in the ink production process:

1. Uneven mixing: Foam will prevent the uniform mixing of pigments, resins, solvents and other components in the ink, resulting in unstable ink quality and inconsistent colors.

2. Reduce viscosity and fluidity: Foam increases the effective volume of the ink, reducing the viscosity and poor fluidity of the ink, which may cause the ink to be unable to be evenly coated on the printing material during the printing process.

3. Poor printing effect: Excessive foam can cause uneven dispersion of ink during the screen printing process, which may cause blurred printing patterns, incomplete colors, and even blanks or peeling off.

The use of defoaming agents in the mixing and blending process will quickly reduce the surface tension of the foam, causing the foam to burst and eliminate the foam problem. Defoaming agents are usually used in small doses to avoid adverse effects on ink performance.

The application of screen printing ink defoamer can effectively reduce foam problems in ink production and improve the quality stability and printing effect of ink. The selection of defoaming agent type and dosage should take into account the specific requirements of the ink formula and production process to ensure that it is compatible with other ingredients and meets relevant standards.