How to improve the adhesion between screen printing silicone and polyester fabric?
To improve the adhesion between screen printing silicone and polyester fabric, we can start from the following aspects:
1. Surface treatment
Cleaning fabric: Clean the polyester fabric thoroughly before printing to remove impurities such as grease and dust to ensure a clean surface.
Using primer: Apply primer before printing to enhance the adhesion between silicone and fabric.
2. Silicone selection and formula adjustment
Choose high-adhesion silicone: Choose high-adhesion silicone specifically for polyester fibers.
Add adhesion promoter: Add adhesion promoter to silicone to improve its bonding performance with polyester fibers.
3. Optimize printing process
Control silicone thickness: Ensure that the thickness of the silicone layer is uniform. Too thick or too thin will affect adhesion.
Adjust the scraper pressure: Adjust the scraper pressure appropriately to ensure that the silicone is evenly distributed on the surface of the fabric.
Control printing speed: Maintain an appropriate printing speed to avoid uneven distribution of silicone due to too fast or too slow printing.
4. Optimize the curing process
Ensure sufficient curing: Ensure sufficient curing time and temperature according to the curing requirements of silicone to avoid insufficient curing and decreased adhesion.
Control the curing environment: Maintain a suitable curing environment to avoid excessive humidity or low temperature affecting the curing effect.
5. Post-processing
Heat treatment: Perform appropriate heat treatment after curing, such as hot air drying or infrared heating, to further enhance adhesion.
Pressure treatment: Apply appropriate pressure during or after curing to increase the contact area and adhesion between silicone and fabric.
6. Testing and verification
Adhesion test: Perform adhesion test after printing, such as peel test, to ensure that the adhesion between silicone and fabric meets the requirements.
Adjust process parameters: Adjust process parameters according to test results to optimize printing effect.
Through the above measures, the adhesion between screen printing silicone and polyester fiber fabric can be effectively improved to ensure the durability and aesthetics of the printed pattern.