PRINTING INK ADDITIVES

Different types of waxes are incorporated in lithographic, screen, gravure, & flexographic inks. They also find use in some carbon paper, typewriter ribbon, metal decorative and magnetic inks. These waxes impart mar, rub and scuff-resistance, and improved slip and water repellency properties. Small additions of wax are also known to reduce tack without affecting the flow properties of letterpress and lithographic inks. 

Rub resistance characteristics are dependant on the particle size, hardness and melting point of the wax added to the ink formulation. FINAWAX, fatty amides, migrate to the surface of the ink by forming a thin layer. The presence of FINAWAX at the surface of the dried ink film reduces the scuff by decreasing the coefficient of friction.

FINAWAX additives improve the slip of flexographic inks. This property is very important when printing on plastic surfaces, which ensures that the coefficient of friction over the printed area is similar to that over the non-printed area, leading to better surface finish and easier processing. FINAWAX-E has been found to be most effective for this application. FINAWAX-O increases the hydrophobicity of the off-set lithographic inks, giving a sharper printed image.

FINAWAX-S is useful in the over-printing and wet-printing of papers. This property is important when the printed surface is to be coated with a varnish or lacquer. Coating with conventional waxes may not adhere over the ink and may result in a non-continuous, defective film. This is also true in applications where a second ink instead of coating is used for over-print.

FINAWAX-S increases the body and improves appearance by better ink lay. It reduces the crawling at the edges of the ink and prevents cracking or chipping of the ink. Low percentages of FINAWAX-S does not effect the gloss of the inks. 

FINAWAX-O is used as an adhesion promoter and slip agent in polyamide-based inks especially on polyethylene films for food packaging. Use of 2% FINAWAX-O (on ink) at the grinding stage in offset inks helps to reduce emulsification. It should be added to the resin base and wetting agents are not required.

FINAWAX additives like FINAWAX-O and FINAWAX-S are used as solubilizers, wetting agents, stabilizers for oil-in-water emulsions and ink transfer improvers. They also find applications in dot-matrix ribbons, printer toners and as wax components of ink jet inks. FINAWAX additives are used to give slip and silky feel in inks used for printing beverage cans and metal bottle tops. 

The use of FINAWAXES in the printing inks offer the following advantages :

• Good Slip and Anti-block Properties.
• Good Scuff and Metal Mark Resistance.
• Increased Scratch and Rub Resistance.
• Increased Water Repellancy Properties. 
• Improved Surface Finish.
• Improved Spreading and Adhesion Properties. 

Further more please opened " FINAWAX ADDITIVES FOR INK "

" Finawax E "
" Finawax O "
" PE Wax Emulsion "


Michael
michael@sanminglobe.com
WA 0858-94436642