How to improve the adhesive of silicone screen printing
Improving the adhesion of silk-screen silicone on textiles is a multi-faceted process. Here are some specific measures and suggestions:
1. Choose the right adhesive
Material matching: Choose the right adhesive based on the material of the textile and the properties of the silicone. For example, polyurethane or acrylic adhesives work well in bonding silk-screen matte silicone to base silicone because they provide strong bonding strength.
Environmental friendliness: When choosing an adhesive, you should also consider its environmental friendliness to ensure compliance with relevant regulations and standards.
2. Optimize the printing process
Printing pressure adjustment: Properly adjusting the printing pressure is an effective way to improve the bonding strength of silicone. Excessive pressure can cause the silicone to be squeezed out during the printing process, affecting the bonding effect; too little pressure can cause the silicone to be unable to fully contact the textile. Therefore, the appropriate printing pressure should be adjusted according to the specific situation to ensure that the silicone is fully in contact with the textile and form a good bond.
Silicone concentration and coating: Controlling the concentration and coating amount of silicone is also critical. Too thin silicone may cause penetration problems, while too much silicone may cause edge bursting. Therefore, the concentration and coating amount of silicone should be adjusted according to the material of the textile and the required bonding effect.
3. Surface treatment of textiles
Increasing surface tension: Before screen printing, the textile is surface treated, such as using chemical or physical methods, to increase its surface tension and cleanliness. This helps to increase the contact area and bonding strength between silicone and textiles.
Choose suitable fabrics: Environmentally unfriendly fabrics and dark fabrics may affect the bonding strength of silicone. Therefore, when choosing textiles, environmentally friendly and easy-to-bond fabrics should be given priority.
4. Post-treatment reinforcement
Annealing treatment: After printing, annealing treatment of textiles helps the molecular diffusion and bonding between silicone and textiles, thereby improving the bonding strength.
Other post-treatment: Post-treatment steps such as irradiation and coating can also be considered to further enhance the bonding effect between silicone and textiles.
5. Quality control and testing
Regular testing: During the production process, the bonding effect is regularly tested and evaluated to ensure that the product quality meets the requirements.
Feedback and improvement: According to the test results and user feedback, the production process and parameters are adjusted and optimized in a timely manner to continuously improve the strength of the bonding force.