Flexible Films & Cardboards 

Digital Waterborne Inks that unlock the possibility of industrial printing for Packaging

An ultimate challenge

Digital printing on flexible films with waterborne inks is widely demanded in applications that are still in transition from conventional to digital printing such as luxury vinyl tiles (LVT) or flexible packaging. Compared to solvent or UV inks are sustainable solution due to the low VOC formulations and absence of toxic photo-initiators.

Re-soluble Digital Binders: ESAJET

Re-soluble Digital Binders: ESAJET

Water-based inks printing on flexible films is a complex process because there is a risk to unbalance the fragile equilibrium that links sprint reliability with ink drying properties and performance of the printed material.
Unlike printing on porous materials, printing on a non-porous substrate requires the ink to dry faster than usual to deliver a good print quality. This means reducing the amount of humectants, in particular glycols with high boiling point, which, in turn, contributes to faster evaporation of water inside the nozzles.
On the other hand, the printed film is an intermediate product, which needs to show a good adhesion, lamination or scratch resistance. This means using binders delivering high application performance, which are generally good film-formers and put the printhead integrity even more at risk when the ink contains a minimal amount of humectant.
In order to restore this equilibrium, we have developed the ESAJET “digital” binders range, based on polyurethane and acrylic dispersions. They provide an outstanding lamination strength while offering a good ink re-solubility in presence of low humectant levels, assuring safety for the printheads.

ESAJET Digital Binders


New development with improved resolubility for prints onto plastics, intended to be laminated afterwards, either with glue (e.g. PP, PET) or heat (e.g. PVC).


Binder with good adhesion and lamination strength on plastics in general


Hard binder for surface printing. Good adhesion strength to plastics


Self-crosslinkable acrylic binder with excellent fastness properties and compatibility to a wide range of dispersions

Transparent and moisture resistant receptive coatings: ESACOTE® PU

Transparent and moisture resistant receptive coatings: ESACOTE<sup>®</sup> PU

The absence of porosity of the flexible films impedes to remove water and glycols of the inkjet ink by absorption. Relatively large amounts of low viscosity ink stand in liquid form on the surface of the substrate before an auxiliary drying device speeds up the evaporation process. During that time interval, the ink is prone to “move” laterally creating printing defects like bleeding, mottling and craters. 

To prevent the degradation of the print definition when the ink is still “wet”, we can prime the film with hydrophilic swelling materials, like CMC or silica gel, that will quickly remove water from the incoming ink droplets and deliver a good print definition. However, that generates a translucent or opaque printable layer, which is often detrimental to the further use of the printed film. For example, reverse printing for food packaging will not cast the expected shine, or the lamination strength of a printed film will be insufficient. Therefore this process is limited in some graphic applications and not fit for industrial film applications.

To overcome this issue, we have developed a dedicated range of binders for the formulation of digital primers, that helps to maintain the print definition without losing the film transparency, lamination performance and moisture fastness required in certain food packaging applications. 

Recommended products


Cationic binder modified in order to increase reactivity with the ink and improve print definition. Very low hygroscopicity


Cationic binder with low hygroscopicity , gives a wide operation opportunities to formulators


PU-PAC waterborne dispersion, specially modified in order to enhance print quality of waterbased digital inks. Good adhesion on BOPET and BOPP films.


Non-ionic waterborne PU dispersion, good compatibility with main additives used to improve print quality of waterbased digital inks. Slightly hygroscopic.


Anionic waterborne PU dispersion, designed to provide the best compatibility with functional additives used to enhance print quality of WB digital inks. Neutral pH, low hygroscopicity.



Self-crosslinking acrylic emulsion with good compatibility with functional additves used to enhance print quality of WB digital inks. Improved adhesion on plastic substrates especially BOPP.


Hydroxilated acrylic emulsion with good compatibility with functional additives used to enhance the print quality of WB digital inks. Good antiblocking resistance and adhesion on plastic films.

Other Ingredients

Besides those targeted solutions, we have a wide portfolio of other specifically designed ingredients to prepare premium inks. We rely on our Lamberti core technologies to offer an extensive range of FLUIJET® hyper-dispersants for pigments and dyes. Those solutions deliver high milling efficiency, high level of gloss due to small particle size of stabilized pigments/dyes.




via Marsala, 38D
21013 Gallarte Italy