Xysiliconeink com Private1 week ago - Multimedia - Warangal - 8 views
Limitations of Silicone Printing
The use of silicone inks like screen printing silicone ink, mold silicone ink and other silicone inks by pad printing or screen printing comes at a great cost. Silicone ink tends to stick to the printing pad, making the printing labor-intensive, as regular cleaning is needed to keep printing quality. As silicone ink does not dry out like solvent-based ink, it needs baking in an oven to cure. Multicolor printing needs separate time and labor-intensive runs for each color, making production time consuming. Using screen printing techniques with silicone ink makes achieving efficient mass production even harder.
Traditional solvent based or PU based inks are not reliable for printing on the silicone surface. The surface energy of silicone is very low which the reason why the inks can not adhere to the silicone surface which makes the intermolecular forces very low. The intermolecular forces that contract the surface are termed surface tension. Surface tension, a measurement of surface energy, is expressed in dynes/cm. The higher the surface energy of the solid substrate relative to the surface tension of a liquid (water, printing inks, adhesives/encapsulation, coatings, etc.), the better will be its "wettability" and the smaller will be the contact angle. These types of chemically inert materials like silicone are hydrophobic and not naturally wettable. Compatibility between ink and polymeric substrate are the application challenges to achieve.