The quality problems of screen printing silicone mainly include the following aspects:
Bubble problem:
Bubbles may be generated during the stirring of silicone. If these bubbles are not removed in time, they will affect the clarity and flatness of the pattern during the printing process.
Solution: The viscosity of the silicone can be reduced by vacuum treatment or the use of diluents, thereby accelerating the discharge of bubbles.
Poor bonding:
The bonding strength between silicone and fabric or other substrates is insufficient, which may cause the printed pattern to fall off or crack during use.
Solution: It is necessary to select targeted screen printing silicone according to the color and material of the fabric, and use special additives to improve the bonding effect. At the same time, for fabrics that are difficult to bond, such as nylon and Lycra, special treatment agents can be used to enhance the bonding strength.
Silicone "poisoning":
Some fabrics, especially black fabrics, may contain environmentally unfriendly dyes or sulfides, which may cause silicone "poisoning" after contact with silicone, which is manifested as poor curing of silicone or color change.
Solution: Adding an appropriate amount of platinum catalyst to the silicone can effectively solve the "poisoning" problem. At the same time, cloth containing harmful substances should be avoided as much as possible.
Silicone consistency problem:
The consistency of silicone directly affects its printing performance and the clarity of the pattern. If the silicone is too thick, it may cause printing difficulties; if it is too thin, it may affect the three-dimensional sense and edge clarity of the pattern.
Solution: The consistency of silicone can be adjusted by adding diluents or thickeners to meet printing needs.
Printing effect problems:
Including blurred patterns, uneven colors, unclear edges, etc. These problems may be caused by various factors, such as uneven ink concentration, poor quality of printing screens, and too fast printing speeds.
Solution: Ensure that the ink concentration is appropriate, the screen quality is good, and the printing speed is appropriately reduced. At the same time, regularly cleaning the screen and printing equipment to maintain their cleanliness can also effectively improve the printing effect.
In summary, the quality problems of screen printing silicone involve multiple aspects, and need to be solved by comprehensively considering multiple factors such as raw material selection, process control, and equipment maintenance. In actual operation, close attention should be paid to various details in the printing process, and problems should be discovered and solved in a timely manner to ensure the stable and reliable quality of screen printing silicone.