NON-WATER SOLUBLE LUBRICANT ENTRY SHEET FOR DRILLING

摘要

PURPOSE: A non-water soluble lubricant entry sheet for drilling is provided to obtain hole position accuracy with a high precision while using a drill bit with a diameter of minimum 0.15 mm fai. CONSTITUTION: A non-water soluble lubricant entry sheet for drilling comprises a lubricant layer obtained by a mixture containing 10~90wt% of non-water soluble thermoplastic resin with a molecular weight of over 10,000 and 10~90wt% of non-water soluble lubricant compound with a molecular weight of over 200~10,000. The lubricant layer is formed on one surface of a metal foil or a plastic film. The non-water soluble thermoplastic resin is selected from the group consisting of a polyester resin, a polyamide resin, and a polyurethane resin. The non-water soluble lubricant compound includes the melting point or the softening point of 20~200 deg C.