To solve the problem of pressing down fine fibers and avoiding pinholes or fiber protrusions when screen-printing silicone on cotton fabric, the core approach is to .
Ordinary silicone inks lack sufficient fluidity and hiding power, making it difficult to cover the fabric fibers. Targeted adjustments are required as follows:
Select high-solid-content and high-hiding-power silicone ink
Prioritize addition-cure silicone ink (compared with condensation-cure silicone ink, it forms a denser film and exhibits stronger adhesion after curing). The solid content is recommended to be >= 90%, which reduces fiber exposure caused by ink shrinkage after solvent evaporation.
silicone-specific high-transparency hiding powder (e.g., nano-silica, fumed silica) at a controlled dosage of 3%–5%. Excessive addition should be avoided to prevent ink thickening and screen clogging.
15,000–25,000 mPa·s (at 25℃). Excessively high viscosity will prevent the ink from fully filling the fiber gaps; excessively low viscosity may cause ink bleeding and pinholes.
silicone-specific leveling agent0.5%–1% the fine fibers.
. Only use silicone-specific thinner to avoid damaging the silicone curing system.
Anysil silicone ink AS9301 would be your best choice.
