Patent ID: 7147669

Claim:
A method of preparing a treated textile, comprising steps of: (1) preparing a treatment liquid comprising a water- and oil-repellent agent, (2) adjusting pH of the treatment liquid to at most 7, (3) applying the treatment liquid to a textile wherein said textile is selected from the group consisting of a nylon fiber and a polyester fiber, (4) treating the textile with steam, and (5) washing the textile with water and dehydrating the textile, wherein the water- and oil-repellent agent comprises at least one fluorine-containing compound selected from the group consisting of a fluorine-containing polymer and a fluorine-containing low molecular weight compound, the treatment liquid contains both a cationic emulsifier and a salt selected from the group consisting of a metal salt of an organic acid and an inorganic acid, and the treatment liquid does not contain a stain blocking agent.