Formulate printing inks for non-polar plastics

Formulate printing inks for non-polar plastics

Can you tell us how to formulate printing inks for non-polar plastics such as polyolefins ?



Printing on non-polar plastics can always be a problem if the surface has not first made wettable, e.g. by corona treatment or at least by flame treatment.
Here's suggested formula - all figures are in percent by weight
Nylon resins15 - 20 %
Organic pigment8 - 12 %
Ethanol10 - 20 %
Isopropanol15 - 45 %
Ethyl acetate10 - 15 %
Wax dispersion4 %
A general purpose screen printing ink for metallic substrates, including copper could have the following starting formulation ( figure again in percent by weight )
Resin, e/g. dehydrated castor oil alkyd 35%
Pigment ( titanium dioxide or others )25 - 30 %
Extender10 - 15 %
White spirit10 %
Methoxybutanol10 %
Drier, e.g. Calcim naphthenate1 %
This kind of formulation should withstand temperatures of up to 80o C.




Blog, Updated at: 5:41 PM
 
back to top