METHODS OF PRETREATING HYDROPHOBIC FABRICS PRIOR TO PRINTING
Provided herein are processes and methods of pretreating a fabric (such as hydrophobic fabric) prior to the application of graphics using, for example, inkjet printing. The process may comprise, for example, applying a pretreatment composition to at least a portion of the bottom face of a textile, thereby causing the pretreatment composition to migrate to the top face of the textile via capillary action. The process may further comprise a printing step wherein one or more inks are applied to the top face of a textile, thereby forming a graphical image on the textile.
1 . A method for creating a printed textile comprising a graphical image, the method comprising:
a pretreatment step for fabrics wherein a pretreatment composition is applied to at least a portion of a first face of a textile ; and
a printing step wherein one or more inks are applied to an opposing second face of the textile, thereby forming a graphical image on the textile.
2 . The method of claim 1 wherein the first face is the bottom face of the textile and the second face is the top face of the textile.
3 . The method of claim 1 wherein pretreatment step comprises spraying the first face of the textile with the pretreatment composition.
4 . The method of claim 3 wherein the pretreatment composition is sprayed using a valve jet or printed with an inkjet printhead.
5 . The method of claim 1 wherein the pretreatment step comprises immersing the first face of the textile in the pretreatment composition.
6 . The method of claim 1 wherein the pretreatment step comprises contacting the first face of the textile with a sponge or sponge-like material, wherein the sponge or sponge-like material comprises the pretreatment composition.
7 . The method of claim 1 wherein the pretreatment step further comprises drying the textile at an elevated temperature without dye migration or staining.
8 . The method of claim 7 wherein the pretreatment step comprises drying the textile at a temperature of at least about 230° F. for a period of at least about 90 seconds.
9 . The method of claim 1 wherein the printing step is an inkjet printing step wherein one or more inks are applied to the textile using an inkjet nozzle.
10 . The method of claim 1 wherein the printing step comprises (1) applying one or more white ink layers to the top face of the textile, followed by (2) applying one or more colored ink layers to the top face of the textile.
11 . The method of claim 1 further comprising a curing step, wherein the curing step comprises heating the printed textile at an elevated temperature.
12 . The method of claim 11 wherein the curing step comprises heating the printed textile at a temperature of from about 200° F. to about 300° F. for a period of between about 30 seconds and about 12 minutes.
13 . A printed textile prepared according to the method of claim 1 .
14 . The printed textile of claim 13 wherein said printed textile is capable of withstanding at least 10 washing cycles while still exhibiting only minor amounts of fading of the graphical image.
15 . The printed textile of claim 13 wherein the graphical image retains at least about 70% of its original color density as measured by a spectro-densitometer after 10 washing cycles.
16 . The printed textile of claim 13 wherein said printed textile avoids discernable yellowing of the textile material upon heating and curing of the applied graphics composition.
17 . A platen useful to print an image on a textile, comprising:
a metal frame defining the exterior surface of the platen; and
a cavity comprising a pretreatment solution.
18 . The platen of claim 17 further comprising an inlet in fluid communication with cavity configured such that the pretreatment solution may be pumped into the cavity.
19 . The platen of claim 17 further comprising an outlet in fluid communication with cavity configured such that the pretreatment solution may be drained from the cavity.