Colorant solvent system, methods of use, and articles
Aspects of the present disclosure relate to color compositions and methods of making a printed layer using the color composition as well as an article that can include the printed layer.
1. A method of printing on an article, comprising:
applying a color composition onto a first side of an article, wherein the first side of the article comprises a polymeric material, wherein the color composition comprises about 5-10 weight percent of 2-pyrrolidone, about 25-45 weight percent of sulfolane, about 25-45 weight percent of ε-caprolactone, and about 1-15 weight percent of a dye; and
allowing the color composition to dry in contact with the first side of the article, forming a printed layer on the first side of the article.
2. The method of claim 1 , wherein the step of applying the color composition onto the first side of the article comprises applying the color composition to the polymeric material exposed on the first side of the article, and, following the step of applying the color composition but prior to the step of allowing the color composition to dry, the method further comprises allowing the color composition to penetrate into the polymeric material.
3. The method of claim 2 , wherein the printed layer extends from a surface of the first side of the article into the polymeric material.
4. The method of claim 1 , wherein the polymeric material comprises one or more thermoplastic polyurethanes.
5. The method of claim 1 , wherein the first side of the article comprises a film, and the film includes an exposed layer comprising the polymeric material.
6. The method of clause 15 , wherein, following the step of allowing the color composition to dry, the first side of the article has a gas transmission rate of 15 cm 3 /m 2 ·atm·day or less for nitrogen for an average wall thickness of 20 mils.
7. The method of claim 5 , wherein the film is a multi-layer film including two or more layers of the polymeric material alternating with one or more layers of a barrier material comprising one or more polymers having a lower gas permeability than the polymeric material, wherein the step of allowing the color composition to penetrate into the polymeric material comprises allowing the color composition to penetrate into an outer portion of the exposed layer of the film, but not into a layer of the barrier material adjacent to the exposed layer of the film, wherein the exposed layer of the film comprises the polymeric material.
8. The method of claim 7 , wherein the method further comprises
applying a first layer of a first composition to the polymeric material on the first side of the article prior to applying the color composition to the first side of the article, the step of applying the color composition to the first side of the article comprises applying the color composition to the first layer while the first composition of the first layer remains wet, and the step of allowing the color composition to dry comprises allowing the color composition and the first composition of the first layer to dry on the first side of the article.
9. The method of claim 8 , wherein the first composition includes a dispersion of uncrosslinked polymers.
10. The method of claim 9 , wherein the dispersion of uncrosslinked polymers includes a water-borne dispersion of uncrosslinked polyurethane copolymers.