NC State
Leminen, V., Tanninen, P., Mäkelä, P., and Varis, J. (2013). "Combined effect of paperboard thickness and mould clearance in the press forming process," BioRes. 8(4), 5701-5714.


Structural and mechanical aspects of the forming of paperboard have received attention in the literature; however, specific forming phenomena of the tray corner and rim area of paperboard packaging have not been researched widely. In light of the importance of the corner for packaging quality, and to enable improved process control of forming, this study considers the forming phenomena of the corner of a press-formed paperboard tray. Four different thicknesses of extrusion-coated paperboard were studied to research the effect of paperboard thickness and mould clearance on the final product of the press-forming process. Suitable mould clearance, i.e., the percentage of the mould cavity that is filled with paperboard, was found to be from 95% to 135% for the tested paperboard types.

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