The application of acrylic plexiglass has become more widespread with the improvement of corresponding production and processing technologies. As we all know, acrylic display stands are ubiquitous in our lives. However, during the screen printing process of acrylic display stands, the problem of residual base film can occur. So, what causes this, and how can it be solved?
Causes and solutions for residual base film during the screen printing process of acrylic display stands:
1. Poor contact between the base plate and the adhesive film during exposure, resulting in low contrast between the base plate and the white background: Check the transparency and blackness of the base plate.
2. Excessive drying temperature causing thermal cross-linking: Control the drying temperature according to the instructions for use of the photosensitive adhesive.
3. Poor contact between the base plate and the adhesive film during exposure: Use vacuum adsorption or other methods to ensure a tight bond.
4. Uneven coating: Increase the screen tension and use a screen applicator to apply the adhesive evenly.
5. Improper selection of exposure lamp source: Conduct an exposure test and adjust the exposure time.
6. Excessive interval between preparation and use of photosensitive emulsion: Select an appropriate light source, preferably strong ultraviolet light (halogen lamp).
7. Underexposure or overexposure: Shorten the interval between use.
8. Incorrect control of processing time, method, and intensity: Correctly control processing time, method, and intensity.
9. Insufficient development time: Increase development time to allow the image to show through.