A new method to evaluate the in-plane compression behavior of paperboard for the deep drawing process

Abstract

To evaluate the influence of different normal pressures and the fiber orientation on the in-plane compression behavior of paperboard during the deep drawing process, a new method was developed. In addition, the influence of the wrinkle formation on the dynamic coefficient of friction and the bending resistance was examined. To evaluate the eligibility of the in-plane compression testing method, a validation strategy was developed to compare the results from the new alternative tests with the punch force profiles from the deep drawing process within an empirical model.

Role of blank moisturisation in press forming of paperboard

“…Because dynamic friction is a phenomenon between moving surfaces, the moisture content at the surface greatly affects friction properties. Lenske et al (2022) suggest that in metal-to-paper friction, the water in the contact zone induces open hydrogen bonds in the paper that are then attracted to a hydrophilic metal surface. This attraction may as part of the adhesion forces contribute to the measured friction forces.…”

“…The friction properties of paperboard with different material pairings, such as aluminium and cellulose film (Kawashima et al 2008), metal and rubber (Deshmukh 2005), stainless steel (Ko et al 2020;Lenske et al 2017), or PTFE foil (Lenske et al 2022) have been investigated. A direct comparison of the obtained values is not possible due to differences in measurement procedures, including normal force, and velocity.…”

Paper as an alternative for collation shrink film

“…[11][12][13][14] • super stretchable paper used for deep drawing applications can be stretched 10-25%, but the elastic spring back is limited to 1-2% depending on the paper type and the coating applied. [15][16][17] • extensive research is being carried out on paper coatings aiming at increased strength or stiffness, increased moisture resistance and improved surface properties … [18][19][20][21][22][23][24][25][26][27][28][29][30] • for a comparable grammage (number of grams per m 2 ), the breaking strength-measured in a standardised tensile test 31 -of the strongest paper types is slightly higher than that of plastic films.…”