Patent ID: 8895111

Claim:
A method of printing on a visible surface of a nonwoven web of synthetic fibers, the method comprising: providing an ink composition comprising a fugitive alkali, an adhesion promoter, and a crosslinking agent in an amount of about 5% by weight to about 20% by weight based on the wet weight of the ink composition, wherein the ink composition has a pH kept above 8 by the fugitive alkali, and wherein the crosslinking agent comprises an aziridine oligomer with at least two aziridine functional groups; and ink jetprinting the ink composition on the visible surface of the nonwoven web, wherein upon printing the ink composition, the fugitive alkali evaporates to decrease the pH of the printed ink composition to trigger the action of the crosslinking agent, and wherein upon drying the ink composition comprises greater than about 25% by weight of the crosslinking agent based on the dried weight of the ink composition and about 10% to about 50% by weight of the adhesion promoter based on the dried weight of the ink composition.