The printing accuracy of screen printing silicone is affected by many factors. The following are some of the main factors:
Screen printing quality:
Parameters such as the selection of screen, mesh number and tension will directly affect the printing accuracy. A low mesh number may result in the printed pattern not being fine enough, while insufficient tension may cause the screen to deform during the printing process, thus affecting the printing quality.
The thickness of the photosensitive adhesive layer and the hardness of the squeegee will also affect the printing effect. A photosensitive adhesive layer that is too thick or a squeegee that is too narrow may result in an incomplete printed image, thus affecting the printing accuracy.
Ink quality:
The viscosity, fluidity and adhesion of the ink have an important influence on the printing accuracy. Inks with excessive viscosity or poor fluidity may result in uneven printing, while inks with poor adhesion may cause the printed pattern to fall off easily.
The viscosity of UV ink varies greatly due to temperature, and is generally more suitable at 15~25℃. At the same time, it should not be exposed to direct sunlight during printing, and should not be close to fluorescent lamps and mercury lamps.
Substrate surface state:
The cleanliness and flatness of the surface of the substrate (such as silicone products) have a great influence on the printing accuracy. A dirty or oily surface will hinder the adsorption of ink and substrate, resulting in unclear or easy falling off of the printed pattern.
The material of the substrate will also affect the adhesion of the ink and the printing effect. Substrates of different materials may require the selection of different types of inks or adjustment of printing parameters to achieve the best printing effect.
Printing process parameters:
Baking temperature and time have an important influence on printing accuracy. Too low a baking temperature or too short a time may cause the ink to not be completely cured, thus affecting the wear resistance and adhesion of the printed pattern.
Parameters such as printing pressure and squeegee speed will also affect printing accuracy. These parameters need to be adjusted and optimized according to the actual printing situation.
Equipment accuracy and maintenance:
The accuracy and stability of the printing equipment have a direct impact on the printing accuracy. Insufficient equipment accuracy or improper maintenance may cause errors and failures during the printing process.
Therefore, regular maintenance and maintenance of the printing equipment is one of the important measures to ensure printing accuracy.
In summary, to improve the printing accuracy of screen printing silicone, it is necessary to comprehensively consider and optimize from multiple aspects such as screen printing quality, ink quality, substrate surface state, printing process parameters, and equipment accuracy and maintenance.