The thickness control of screen printing silicone is a key parameter, which directly affects the quality and effect of the printed product. The following are suggestions for the thickness control of screen printing silicone:
1. Appropriate silicone mesh
Generally, the mesh of silicone is more suitable between 80 and 120. The mesh within this range can ensure that the silicone can be evenly and stably attached to the substrate through the screen, avoiding too thick or too thin deposition.
2. The thickness of photosensitive glue
In the process of screen printing silicone, the thickness of photosensitive glue is also crucial. In order to achieve the ideal three-dimensional effect, a thicker photosensitive glue than ordinary screen ink should be used. The general thickness is between 0.1 and 0.5 mm, but it needs to be determined according to the actual thickness of the sample. Too thick photosensitive glue may cause the printed pattern to be blurred, while too thin photosensitive glue may not provide sufficient support and affect the printing effect.
3. Specific control of silicone thickness
Choose the right silicone: Choose the right silicone according to the material of the printed object and the printing requirements. Different types of silicone have different hardness, viscosity, durability and transparency, which will affect the deposition thickness and printing effect of silicone.
Adjust the screen: Make sure that the aperture of the screen is adapted to the particle size of the silica gel, and the number of lines of the screen should be determined according to the requirements of the printed material. At the same time, the tension of the screen should be moderate to avoid affecting the printing effect.
Control the thickness of the printed layer: Control the thickness of the printed layer by controlling the amount of silica gel, screen pressure and printing speed. Too little silica gel will result in insufficient thickness of the printed layer, while too much will make the printed layer too thick, affecting the printing quality. Too much or too little screen pressure will affect the deposition effect of silica gel, and the speed of printing will also affect the uniformity of the thickness of the printed layer.
4. Precautions
Test and adjust before actual printing to ensure that the thickness of the silica gel meets the printing requirements.
Check the printing equipment and tools regularly to ensure that they are in good working condition to avoid uneven thickness of the silica gel caused by equipment problems.
Pay attention to changes in temperature and humidity in the printing environment, which may affect the fluidity and drying speed of the silica gel, thereby affecting the deposition thickness.
In summary, the thickness control of screen printing silica gel is a complex and delicate process that needs to be adjusted and optimized according to specific printing needs and conditions. By properly controlling the mesh of the silicone gel, the thickness of the photosensitive glue, and various parameters during the printing process, high-quality prints can be obtained.