Patent ID: 9089930
Filing Date: 2015-07-28
Classification: B23K,C09J,Y10T

Abstract:
1. A method for preventing development of a dross on a surface opposite to a laser beam irradiation face of a stainless steel plate during a laser cutting process, comprising: providing a stainless steel plate having a surface protection sheet adhered to a surface of the stainless steel plate on an opposite side of a face of the stainless steel plate to be subjected to a laser beam irradiation, which sheet comprises a substrate layer and an adhesive layer formed on one surface of the substrate layer, wherein the substrate layer is made of at least one resin material selected from the group consisting of poly(ethylene terephthalate) and low density polyethylene, wherein the resin material has a melt viscosity measurement based on JIS K7199 (1999) at 290° C. of 20-100 Pa·s, wherein the substrate layer has a thickness of 0.02-0.05 mm, and cutting by irradiation process of a laser beam from a carbon dioxide gas laser on the stainless steel plate while blowing 0.5-1.5 MPa assist gas, wherein the surface protection layer sheet together with the stainless steel plate are cut during the cutting process, and wherein a height of the dross is suppressed to 0.5 mm or less.