When diluting screen printing silicone, commonly used additives include silicone oil, ethanol, propylene glycol, water and special silicone diluents. The specific selection needs to be combined with process requirements, dilution effect and the impact on the performance of silicone for comprehensive consideration. The following is a specific analysis:
Silicone oil: Silicone oil is a common additive for diluting liquid silicone. It can not only reduce the viscosity of silicone and increase fluidity, but also has a certain lubrication and dispersion effect. In screen printing silicone, adding an appropriate amount of silicone oil can effectively improve the printing performance of silicone, but it is necessary to control the amount of addition to avoid excessive dilution affecting the curing hardness and physical properties of silicone.
Ethanol: Ethanol, as a solvent, can also be used to dilute liquid silicone. It has the characteristics of fast volatility and easy operation, but the concentration also needs to be controlled to avoid adverse effects on the performance of silicone.
Propylene glycol: Propylene glycol is also a commonly used solvent for diluting liquid silicone. Similar to ethanol, when using propylene glycol, it is also necessary to control the concentration to ensure the stability of the performance of the diluted silicone.
Water: Water can also be used as a diluent in some cases, but special attention should be paid to controlling the temperature and pressure of the water to avoid adverse effects on the performance of silicone. In addition, the dilution effect of water may be relatively limited and may affect the curing speed and hardness of silicone.
Special silicone diluents: There are also some diluents designed specifically for silicone on the market. These diluents are usually environmentally friendly, odorless, easy to dilute, and not easy to foam. Using special silicone diluents can more conveniently control the dilution effect while reducing the impact on the performance of silicone.