Engineering estimation of time-dependent deformation characteristics as bending moment relaxation and released unfolding motion of creased paperboard

4th International Conference on Competitive Materials and Technology Processes

Nagasawa, Sh^1

Department of Mechanical Engineering, Nagaoka University of Technology, Nagaoka

940-2188, Japan^1

关键词: Converting industries;    Dynamic deformation;    Engineering estimations;    Experimental approaches;    Fundamental mechanisms;    Response behaviour;    Time-dependent deformation;    Time-dependent stress relaxation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/175/1/012003/pdf
DOI  :  10.1088/1757-899X/175/1/012003

来源: IOP

【 摘 要 】

Paperboards are recognized to be important raw materials for packaging industry due to their advantages such as high strength-to-weight ratio, recyclability. Regarding the development of advanced packaging materials and the requirement of smart formed products, a study of sheet's response behaviour is necessary for expanding the advanced converting industry. After introducing a couple of past research works concerned crease technologies, a fundamental mechanisms of crease deformation is reviewed using the scoring depth and the folding angle of a paperboard. Since one of important forming characteristics is a time-dependent stress relaxation or time-delayed strain during a fold/unfold process, the author's experimental approaches for estimating a short term (less than 10 seconds) dynamic deformation behaviour of creased paperboard are discussed.