Patent ID: 7717963

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 a propylene 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 a fluorine-containing polymer having a weight average molecular weight of 2,000 to 1,000,000 and a fluorine-containing low molecular weight compound, the treatment liquid contains both a cationic emulsifier and a salt, and the treatment liquid does not contain a stain blocking agent, and wherein the fluorine-containing polymer comprises: (I) repeat unit derived from a fluoroalkyl group-containing monomer selected from the group consisting of a fluoroalkyl group-containing (meth)acrylate, a fluoroalkyl group-containing maleate or fumarate, and a fluoroalkyl group-containing urethane, and (II) repeat unit derived from a fluorine-free monomer selected from the group consisting of vinyl halide and vinylidene halide, and the fluorine-containing low molecular weight compound has a molecular weight of less than 2,000, and wherein the salt is selected from the group consisting of a metal salt of an organic acid and an inorganic acid.