Patent ID: 9211592
Filing Date: 2015-12-15
Classification: B23B,B32B,H05K,Y10T

Abstract:
1. A lubricant sheet for drilling a laminate or a plastic board, comprising a member selected from the group consisting of a metal foil and an organic film, and a combined layer comprising a primer layer and a lubricant resin composition layer containing at least one water-soluble resin selected from the group consisting of polyethylene oxide, polypropylene glycol and polypropylene oxide as a main component and having a thickness of 5 to 100 μm, and containing 0.1 to 5% by weight of an organic dye and/or organic pigment in at least one of the primer layer and the lubricant resin composition layer, wherein the metal foil is a hard, soft or annealed aluminum foil having a thickness of 50 to 500 μm, or an aluminum foil which is obtained by combining these foils, and the layer is formed on one surface of the member.