Treatment of textile product for imparting water and oil repellency

Abstract

A textile having sufficient water repellency, oil repellency and soil releasability before and after cleaning can be prepared by a method of preparing a treated textile has the steps of (1) preparing a treatment liquid containing a water- and oil-repellent agent and a stain blocking agent, (2) bringing the pH of the treatment liquid to at most 7, (3) applying the treatment liquid to the textile, (4) thermally treating the textile with steam, and (5) washing the textile with water and dehydrating the textile, wherein the water- and oil-repellent agent has a combination of (A) a fluorine-containing polymer comprising a repeat unit derived from vinyl chloride and/or vinylidene chloride, and (B) a fluorine-containing polymer free from a repeat unit derived from vinyl chloride and/or vinylidene chloride.

1 . 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, preferably at most 2,    (3) applying the treatment liquid to the textile,    (4) thermally 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 combination of (A) a fluorine-containing polymer comprising a repeat unit derived from vinyl chloride and/or vinylidene chloride, and (B) a fluorine-containing polymer free from a repeat unit derived from vinyl chloride and/or vinylidene chloride.    
     
     
         2 . The method according to  claim 1 , wherein the fluorine-containing polymer (A) comprises: 
 (A-I) a repeat unit derived from a monomer having a fluoroalkyl group, and    (A-II) a repeat unit derived from vinyl chloride and/or vinylidene chloride.    
     
     
         3 . The method according to  claim 1 , wherein the fluorine-containing polymer (A) comprises: 
 (A-I) a repeat unit derived from a monomer having a fluoroalkyl group,    (A-II) a repeat unit derived from vinyl chloride and/or vinylidene chloride,    (A-III) a repeat unit derived from a fluorine-free monomer, and    (A-IV) a repeat unit derived from a crosslinkable monomer.    
     
     
         4 . The method according to  claim 1 , wherein the fluorine-containing polymer (B) comprises 
 (B-I) a repeat unit derived from a monomer having a fluoroalkyl group, and does not comprise a repeat unit derived from vinyl chloride and/or vinylidene chloride.    
     
     
         5 . The method according to  claim 1 , wherein the fluorine-containing polymer (B) comprises: 
 (B-I) a repeat unit derived from a monomer having a fluoroalkyl group,    (B-II) a repeat unit derived from a fluorine-free monomer, and    (B-III) a repeat unit derived from a crosslinkable monomer, and does not comprise a repeat unit derived from vinyl chloride and/or vinylidene chloride.    
     
     
         6 . A textile obtainable by the method according to  claim 1 .  
     
     
         7 . A carpet obtainable by the method according to  claim 1 .  
     
     
         8 . The carpet according to  claim 7 , wherein the carpet comprises a nylon fiber, a propylene fiber and/or a polyester fiber.  
     
     
         9 . The carpet according to  claim 7 , which has the water repellency of at least 90 and the oil repellency of at least 5 before the cleaning, and the water repellency of at least 40 and the oil repellency of at least 2 after 10 times of the cleaning, 
 wherein the numerical value of the water repellency is a maximum content of IPA (% by volume) in a test solution resulting from the test that five droplets of an isopropyl alcohol (IPA)/water mixture test solution are softly positioned on a carpet surface, the penetration state of the droplets after 10 seconds are observed and at least four droplets do not exhibit the penetration, and    the numerical value of the oil repellency is a maximum value of oil repellency according to AATCC-TM-118-1992 resulting from the test that five droplets of a test solution are softly positioned on a carpet surface, the penetration state of the droplets after 30 seconds are observed and at least four droplets do not exhibit the penetration.    
     
     
         10 . A water- and oil-repellent agent used in 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, preferably at most 2,    (3) applying the treatment liquid to the textile,    (4) thermally treating the textile, and    (5) washing the textile with water and dehydrating the textile,    wherein the water- and oil-repellent agent comprises a combination of (A) a fluorine-containing polymer comprising a repeat unit derived from vinyl chloride and/or vinylidene chloride, and (B) a fluorine-containing polymer free from a repeat unit derived from vinyl chloride and/or vinylidene chloride.