Fluid set comprising a pre-treatment liquid and an inkjet ink

1. A fluid set for textile printing, the fluid set comprising:

an aqueous inkjet ink including a pigment stabilized by anionic dispersing groups; and

an aqueous pre-treatment liquid including a capsule including a core and a shell; wherein

the core includes a thermally reactive crosslinker and the shell includes cationic dispersing groups; and

the cationic dispersing groups are obtained by reacting a surfactant including at least one primary amine or secondary amine and a quaternary ammonium group with a compound selected from the group consisting of di- or poly-acid chlorides, di- or oligoisocyanates, di- or oligosulfochlorides, di- or oligo-chloroformates, and an isocyanate monomer included in the shell; and

wherein the surfactant is represented by Formula I:

wherein

R 1 is selected from the group consisting of a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, and a substituted or unsubstituted alkynyl group, and R 1 includes at least eight carbon atoms;

R 2 , R 3 , and R 4 are independently selected from the group consisting of a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted alkaryl group, and a substituted or unsubstituted (hetero)aryl group;

Li represents a divalent linking group including no more than eight carbon atoms; and

X represents a counterion that compensates for a positive charge of the quaternary ammonium group.

2. The fluid set according to claim 1 , wherein the aqueous inkjet ink includes a resin selected from the group of an acrylic based resin, a urethane based resin, and a polyethylene wax.

3. The fluid set according to claim 2 , wherein the urethane based resin is a polyurethane resin obtained by reacting a polyester polyol, a polyether diol, a polyol or an amine including an anionic group, and a polyisocyanate; and

the polyester polyol is obtained by reacting an aromatic polycarboxylic acid and a polyol.

4. The fluid set according to claim 1 , wherein the aqueous inkjet ink includes a capsule including a core including one or more chemical reactants that form a reaction product upon application of heat and/or light, and a polymeric shell stabilized by anionic dispersing groups.

5. The fluid set according to claim 4 , wherein the one or more chemical reactants includes a thermally reactive crosslinker.

6. The fluid set according to claim 5 , wherein the thermally reactive crosslinker includes a blocked isocyanate.

7. The fluid set according to claim 6 , wherein the blocked isocyanate is derived from a di-, tri- or tetrafunctional isocyanate terminated oligomer selected from the group consisting of an isocyanate terminated oligo-ether, an isocyanate terminated oligo-ester, an isocyanate terminated oligo-carbonate, an isocyanate terminated butadiene oligomer, an isocyanate terminated hydrogenated butadiene, an isocyanate terminated isoprene oligomer, an isocyanate terminated silicone oligomer, and combinations thereof.

8. The fluid set according to claim 1 , wherein the aqueous inkjet ink includes a water-soluble organic solvent.

9. The fluid set according to claim 1 , wherein the aqueous pre-treatment liquid includes a white pigment.

10. A digital textile printing method comprising the steps of:

providing the fluid set as defined in claim 1 ;

applying the aqueous pre-treatment liquid to a textile fabric;

optionally applying heat to activate the thermally reactive crosslinker;

jetting the aqueous inkjet ink onto the textile fabric; and

applying heat to activate the thermally reactive crosslinker if the step of optionally applying heat to activate the thermally reactive crosslinker has not been performed.