Lubricant sheet for drilling and method of drilling

Abstract

A lubricant sheet suitable for use in a process of drilling a laminate or a plastic board, comprising a metal foil or an organic film, and a lubricant resin composition layer or a primer layer and the lubricant resin composition layer, the lubricant resin composition layer or the primer layer and the lubricant resin composition layer being formed on at least one surface of the metal foil or the organic film, wherein at least one layer of the primer layer and the lubricant resin composition layer contains a colorant, and a drilling method using the above lubricant sheet.

1 . A lubricant sheet suitable for use in a process of drilling a laminate or a plastic board, comprising a metal foil or an organic film, and a lubricant resin composition layer or a primer layer and the lubricant resin composition layer, the lubricant resin composition layer or the primer layer and the lubricant resin composition layer being formed on at least one surface of the metal foil or the organic film, 
 wherein at least one layer of the primer layer and the lubricant resin composition layer contains a colorant.    
     
     
         2 . The lubricant sheet according to  claim 1 , 
 wherein the colorant is a water-soluble colorant.    
     
     
         3 . The lubricant sheet according to  claim 1 , 
 wherein the colorant is a nonhalogen colorant.    
     
     
         4 . The lubricant sheet according to  claim 1 , 
 wherein the lubricant resin composition contains a water-soluble resin as a main component.    
     
     
         5 . The lubricant sheet according to  claim 1 , 
 wherein the organic film has roughness of 0.5 to 15 μm on a surface thereof and a distance between convex portions of the roughness is 1 to 50 μm.    
     
     
         6 . The lubricant sheet according to  claim 1 , 
 wherein the organic film contains a colorant.    
     
     
         7 . A method of drilling a laminate or a plastic board, which method comprises 
 disposing the lubricant sheet recited in  claim 1  on the laminate or the plastic board, and    drilling a hole from the lubricant resin composition layer side.