| 摘要 |
PURPOSE: A lubrication entry sheet and a manufacturing method thereof, which prevent the detachment of a lubrication coating film, is provided to secure punching reliability and drilling accuracy when a drill bit punches a lubrication entry sheet. CONSTITUTION: A lubrication entry sheet comprises a metal film(110) and a lubrication coating film(120). The lubrication coating film is directly coated on one side of a metal film. The lubrication coating film contains a lubricating agent, a softening agent, a viscosity controlling agent and an adhesion enhancing agent. The adhesion enhancing agent comprises starch, polyvinyl alcohol PVA, poIycaprolactone, polyhydroxy butyric acid and polyhydroxybutylate.
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