Effect of crease depth and crease deviation on folding deformation characteristics of coated paperboard

Paperboard die cutting, which includes creasing, is a production technique widely spread in many fields such as foods, stationery packaging. For the improvement of productivity or the improvement of quality on die cutting, the estimation of endurance on die tools and the estimation of material properties on paperboard are required. Creasing is one of most important mechanical behavior for paperboard die cutting. This paper reports on a fundamental deformation behavior and fracture modes as delamination patterns of coated paperboard creased. The creasing characteristics were investigated by varying the crease depth and the lateral deviation of rule clearance. By reviewing the bending moment resistance and by observing the delamination process of creased part under a folding test, the variance of bending moment characteristics of creased part was discussed. Furthermore, by adding the lateral deviation of rule clearance, the correlation between the moving direction of the folding point and the non-symmetrically delaminated zones was also investigated. (C) 2003 Elsevier B.V. All rights reserved.