SHEET PEELING METHOD AND SHEET PEELING DEVICE

PROBLEM TO BE SOLVED: To make an area to be a defective area as small as possible in a sheet peeling method.SOLUTION: A sheet peeling method includes: a first step of, while conveying an object, in which a long first sheet 2 is adhered to a surface of a long and sheet-like substrate 1, in a first direction 81 at a speed equal to or faster than a first speed, continuously peeling the first sheet 2 from the substrate 1 at a branch point P2 where the first sheet 2 and the substrate 1 are separated in different directions and advance; a second step of, from a state where the first step is performed, decelerating or stopping so that a conveying speed of the substrate 1 becomes slower than the first speed; a third step of displacing the branch point P2 relative to the substrate 1 in the first direction 81 by conveying the substrate 1 in a second direction 82; and a fourth step of, while displacing the branch point P2 relative to the substrate 1 in the second direction 82, resuming the first step by increasing a relative conveying speed of the substrate 1 as seen from the branch point P2 to the first speed or more.SELECTED DRAWING: Figure 6 【課題】シート剥離方法において、不良領域となる領域をなるべく少なくする。【解決手段】シート剥離方法は、長尺状かつシート状の基材１の表面に長尺状の第１シート２が付着しているものを第１の向き８１に第１速度以上の速度で搬送しつつ、第１シート２と基材１とが異なる向きに分かれて進行する分岐点Ｐ２において第１シート２が基材１から剥離し続ける第１工程と、前記第１工程が行なわれる状態から、基材１の搬送速度が前記第１速度未満になるように減速または停止する第２工程と、基材１を第２の向き８２に搬送することによって、分岐点Ｐ２を基材１にとって相対的に第１の向き８１に変位させる第３工程と、分岐点Ｐ２を基材１にとって相対的に第２の向き８２に変位させつつ、分岐点Ｐ２から見た相対的な基材１の搬送速度を前記第１速度以上まで上げることによって、前記第１工程を再開する第４工程とを含む。【選択図】図６