Abrasive tape, process for producing it, and coating agent for abrasive tape

Abstract

Provided are an abrasive tape suitable for finishing of surfaces or the like of precision components such as optical connector ferrules and semiconductor wafers, and a process for producing it. A coating agent in which abrasive particles having an average particle size in the range of 1 to 200 mμ are dispersed in a binder resin solution. The coating agent is applied, with intervention of a primer layer if necessary, onto a base for abrasive tape to form an abrasive layer, thus obtaining an abrasive tape.

What is claimed is:  
     
         1 . An abrasive tape comprising: 
 a base for abrasive tape; and    an abrasive layer formed on the base; 
 wherein the abrasive layer is formed from a coating agent in which abrasive particles of an average particle size in the range of 10 to 100 mμ are dispersed in a binder resin solution.  
   
     
     
         2 . The abrasive tape according to  claim 1 , wherein 
 said binder resin solution has a silicone resin or a silicone based resin.    
     
     
         3 . The abrasive tape according to  claim 1  or  2 , wherein 
 the abrasive particles are silica particles.  
 
     
     
         4 . The abrasive tape according to either one of claims  1 ,  2 , and  3 , wherein 
 particle diameters of the abrasive particles in the abrasive layer are between 50 and 800 mμ.    
     
     
         5 . A process for producing an abrasive tape, comprising the steps of: 
 dispersing abrasive particles of an average particle size in the range of 10 to 100 mμ in a binder resin solution,    producing aggregates of the abrasive particles in the binder resin solution to obtain a coating agent containing the abrasive particles of particle diameters 50 to 800 mμ, and    applying the coating agent onto a base for abrasive tape.    
     
     
         6 . The process for producing an abrasive tape according to  claim 5 , wherein 
 said binder resin solution has a silicone resin or a silicone based resin.    
     
     
         7 . The process for producing an abrasive tape according to  claim 5  or  6 , wherein 
 the abrasive particles are silica particles.  
 
     
     
         8 . An abrasive tape comprising: 
 a base for abrasive tape; and    an abrasive layer formed on the base; 
 wherein said abrasive layer has abrasive particles of an average particle size in the range of 1 to 200 mμ and a binder for binding the abrasive particles.  
   
     
     
         9 . The abrasive tape according to  claim 8 , wherein the abrasive particles are silica particles.  
     
     
         10 . The abrasive tape according to  claim 8  or  9 , wherein 
 said binder is a binder having siloxane bonding.  
 
     
     
         11 . The abrasive tape according to either one of claims  8 ,  9 , and  10 , wherein 
 a total ray transmittance of the abrasive layer is 60 to 95% and a haze thereof is 1 to 70%.    
     
     
         12 . The abrasive tape according to either one of claims  8 ,  9 ,  10 , and  11 , wherein 
 a primer layer is provided between the base for abrasive tape and the abrasive layer.    
     
     
         13 . A coating agent for production of an abrasive tape, comprising: 
 an abrasive particle solution containing abrasive particles of an average particle size in the range of 1 to 200 mμ and a solvent for abrasive particles, and    a binder resin solution containing a binder and a binder solvent.    
     
     
         14 . The coating agent according to  claim 13 , wherein 
 a weight ratio of the abrasive particles to the binder in the coating agent is between 20:80 and 95:5.    
     
     
         15 . The coating agent according to  claim 13  or  14 , further comprising: 
 a curing agent for curing the binder.  
 
     
     
         16 . The coating agent according to either one of claims  13 ,  14 , and  15 , further comprising: 
 a dispersing agent for dispersing the abrasive particles.    
     
     
         17 . A process for producing an abrasive tape, comprising the steps of: 
 preparing a base for abrasive tape;    mixing an abrasive particle solution containing abrasive particles of an average particle size in the range of 1 to 200 mμ and a solvent for abrasive particles, with a binder resin solution containing a binder and a binder solvent to produce a coating agent;    applying the coating agent onto the base for abrasive tape; and    drying the coating agent thus applied.    
     
     
         18 . The process for producing the abrasive tape according to  claim 17 , wherein 
 said abrasive particles are silica particles.    
     
     
         19 . The process for producing the abrasive tape according to  claim 17  or  18 , wherein 
 said binder is a binder having siloxane bonding.  
 
     
     
         20 . The process for producing the abrasive tape according to either one of claims  17 ,  18 , and  19 , wherein 
 said step of applying the coating agent is carried out by a gravure reverse process.    
     
     
         21 . The process for producing the abrasive tape according to either claims  17 ,  18 ,  19 , and  20 , wherein 
 said step of drying the coating agent has a step of heating the coating agent immediately after the coating agent is coated, thereby scattering the solvent for abrasive particles and the binder solvent in the coating agent.    
     
     
         22 . The process for producing the abrasive tape according to either one of claims  17 ,  18 ,  19 ,  20 , and  21 , further comprising: 
 preliminarily forming a primer layer over a surface to be coated with the coating on the base for abrasive tape.