Method of removing coating film

Abstract

The present invention provides a method of removing a coating film from the surface of a coated product, which method includes supplying an abrasive onto the surface of a coating film, pressing the abrasive to the surface of a coating film with a press surface of a press element to crush the coating film into a crushed coating film, and removing the abrasive and the crushed coating film, and a method of removing a coating film from the surface of a coated product using a jig for pressing an abrasive onto a coating film with a press element, and crushing the coating film, wherein the jig contains a jig base and plural press elements, and the press element is connected to the jig base such that the press element can be at least displaced to elastically approach or leave the jig base.

What is claimed is  
     
         1 . A method of removing a coating film from the surface of a coated product, which method comprises 
 supplying an abrasive onto the surface of a coating film, pressing the abrasive against the surface of the coating film with a press surface of a press element to convert the coating film into a crushed coating film, and removing the abrasive and the crushed coating film.    
     
     
         2 . The method of  claim 1 , which further comprises applying a peeling agent onto a surface of the crushed coating film.  
     
     
         3 . The method of  claim 2 , wherein the peeling agent dissolves at least a lowermost layer of the coating film.  
     
     
         4 . The method of  claim 1 , wherein the press surface of the press element is curved.  
     
     
         5 . The method of  claim 1 , wherein the press element is a free turning roller.  
     
     
         6 . The method of  claim 5 , wherein the turning roller is attached to a rotary seat of a rotary driven type.  
     
     
         7 . The method of  claim 1 , wherein the press surface of a press element has a curve winding in the direction of movement.  
     
     
         8 . The method of  claim 1 , wherein the abrasive is pressed plural times against the surface of a coating film with a press surface of a press element.  
     
     
         9 . The method of  claim 1 , wherein the coated product is a floor material.  
     
     
         10 . A method of removing a coating film from the surface of a coated product by the use of a jig for pressing an abrasive onto a coating film with a press element to crush the coating film, wherein the jig comprises a jig base and plural press elements, and the press elements are connected to the jig base such that each press element can be at least displaced to elastically approach or leave the jig base.  
     
     
         11 . The method of  claim 10 , wherein said jig base has plural through holes, and each press element is connected to the jig base via plural shafts inserted into each through hole in such a manner that they can at least reciprocate in each through hole.  
     
     
         12 . The method of  claim 10 , wherein the press element is connected to the jig base such that the press element can be at least displaced to elastically approach or leave the jig base and an end thereof is capable of elastic angular displacement relative to the jig base.  
     
     
         13 . The method of  claim 12 , wherein said jig base has plural through holes, and each press element is connected to the jig base via plural shafts inserted into each through hole in such a manner that they are capable of reciprocation and angular displacement in each through hole.  
     
     
         14 . The method of  claim 10 , further comprising an elastic member between the jig base and the press element.  
     
     
         15 . The method of  claim 10 , wherein the press element is a column having a curved end forming a protrusion toward the direction away from the jig base.