Silicone emulsion (water-based) coatings offer some features of solventless
and solvent-based coatings, and some unique advantages of their own.
Same premium release performance as solventless coatings
Uniform, low coat weights can be obtained on simple solvent coating
Can be used in size press operations
Wetting and drying process tends to stress the paper
Buckling, curling and cockling may occur
Thickeners can be added that allow emulsion coatings to be used on more
porous papers, previously considered unsuitable for silicone pressure-sensitive
release applications. Thickeners increase coating viscosity, which reduces
penetration and prevents rupturing of the emulsion film during drying.
Use emulsion coatings if:
Smoothness is secondary to paper cost savings
You need to use solvent-type coating equipment
Use solventless or solvent-based coatings if:
Maintaining paper smoothness is essential
Emulsion delivery systems have been used successfully with platinum and
tin-based cure chemistries.