Patent ID: 7785374

Claim:
A method of making a nylon material resistant to staining by neutral colorants comprising: a) applying a stainblocker composition to a nylon material, wherein the stainblocker comprises a high molecular weight, low OH-containing phenyl/phenol acrylic acid polymer and is present at from about 1.0% to about 10% owf by weight solids on fiber; b) applying an exhaustible polymer composition at a concentration of from about 1.0% to about 10.0% owf by weight solids on fiber to the nylon material after application of step a), wherein the exhaustible polymer composition comprises a multipolymer of styrene, acrylic acid and methacrylic acid, anionic character; and c) applying a topical treatment composition to the nylon material after application of step b), wherein the topical treatment comprises a fluoropolymer comprising one or more polyvinylchloride segments applied in a dry fix application at 0.001% to about 1.0% owf by weight solids on fiber, thereby providing the nylon material with a greater resistance to staining by neutral colorants as measured by Delta E CMC value, when stained with a 10% povidone-iodine solution, of at least about 40% less than the Delta E CMC value of a second nylon material stained with the solution and treated with step a) alone.