Patent ID: 8772185

Claim:
A reversible color-changing sanitizer-indicating nonwoven wipe, comprising: a nonwoven fabric including about 55-90% by weight absorbent nonwoven fibers and about 10-45% by weight reinforcing nonabsorbent nonwoven fibers; and a dried reversible color-changing ink formulation coated onto and durably bound to the nonwoven fabric using a polymer binder selected from the group consisting of polyamides, polyurethanes, and combinations thereof; the durably bound reversible color-changing ink formulation including, based on a dry weight of the ink formulation, about 55-98% by weight of the polymer binder and about 0.1-20% by weight of a reversible color-changing dye, the durably bound ink formulation enabling the nonwoven wipe to repeatedly change back and forth between a first color and a second color at a pH between about 5.5 and about 8.0 during repeated cycles of use of the nonwoven wipe with a quaternary ammonium sanitizer solution, without separating the ink formulation from the nonwoven fabric.