How to solve bubbles when printing non-slip silicone on socks?
1. Silicone pretreatment
Vacuum degassing: Before printing, put the silicone into a vacuum degassing machine to remove bubbles.
Proper stirring: Avoid stirring the silicone too fast to reduce the generation of bubbles.
2. Stencil selection
Mesh size: Choose a suitable mesh size. Too large mesh size will easily generate bubbles, while too small mesh size will affect the flow of silicone.
Stencil cleaning: Ensure that the stencil is clean to avoid bubbles caused by impurities.
3. Printing process
Scraper angle and pressure: Adjust the scraper angle and pressure to ensure that the silicone is evenly coated.
Printing speed: Control the printing speed. Too fast will easily generate bubbles, while too slow will affect efficiency.
4. Environmental control
Temperature and humidity: Maintain appropriate temperature and humidity. Too high or too low will affect the performance of silicone.
Dust-free environment: Operate in a dust-free environment to avoid dust causing bubbles.
5. Post-processing
Curing conditions: Ensure that the curing conditions (temperature and time) are appropriate to avoid bubbles caused by improper curing.
Secondary degassing: Perform secondary degassing before curing.
6. Silicone selection
Low viscosity silicone: Choose low viscosity silicone, which has good fluidity and reduces bubble generation.
High quality silicone: Use high quality silicone, which has fewer impurities and fewer bubble problems.
7. Equipment maintenance
Regular maintenance: Regularly maintain printing equipment to ensure normal operation.
Replace worn parts: Replace worn parts such as scrapers and screens in a timely manner.