Handbook of Paper and Paperboard Packaging Technology

Kirwan, Mark J.

doi:10.1002/9781118470930

Cited by 56 publications

(55 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Other important and industry applicable thin films used in our experiment are paperboard (PPR) which are used in bags, wrappings sacks and infusible tissues, paper-based tubes, tubs and composite containers. Because of the physical properties of these sheet materials (paper board) which contain cellulose fibers, they can be used in various types of flexible, semi-rigid and rigid packaging applied in department stores, pharmacies, education, sport and leisure [5].Thin films have very interesting properties that are quite different from those of the bulk materials which they are made of. This is because of the fact that their properties depend on a number of interrelated parameters as well as the technique employed for their fabrication [6].…”

Section: Introductionmentioning

confidence: 99%

The measurement of Young’s modulus of thin films using secondary laser speckle patterns

Molaei

2016

Measurement

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

The measurement of Young’s modulus of thin films using secondary laser speckle patterns

Molaei

2016

Measurement

View full text Add to dashboard Cite

“…Using the paperboard thickness t and the thickness of the creasing rule b, the groove width B was empirically chosen as 2t + b = 1.6 mm. The paperboard was scored by the creasing rule with a changing indentation depth d. The quantity  = 2d/B is defined here as the normalized indentation depth (Kirwan, 2013;Nagasawa et al, 2015). The creaser direction angle was chosen as 90° with respect to the MD, as shown in Fig.…”

Section: Experimental Initial Creasing Of Specimensmentioning

confidence: 99%

“…In the production of packaging containers, wedge-pushed cutting, creasing by the flatbed die cutter and the folding of creased lines are inevitable and determine the quality of containers (Kirwan, 2013). In the formation of blank patterns made of paperboard, a suitable residual stiffness of the creased parts is necessary for processing the fold of the paperboard in an automatic folder-gluer machine, and the creased lines must be stably folded without any surface failures.…”

Section: Introductionmentioning

confidence: 99%

Finite element analysis of the folding process of creased white-coated paperboard using a combined fluffing resistance and shear yield glue model

Jina

Nagasawa

2018

JAMDSM

View full text Add to dashboard Cite

This study aims to develop a numerical simulation model of the folding process of a creased paperboard and to reveal the deformation characteristics of the creased paperboard. A cantilever type bending moment measurement apparatus was experimentally examined with a 0.43-mm thickness paperboard. To verify the folding mechanics of the creased part, the initial crease was varied within a certain range, and the lamination numbers were considered with 8 layers. A fluffing resistance model based on the z-directional (out-of-plane) tensile test was developed and simulated using isotropic elasto-plastic solid properties. However, because the fluffing resistance is restricted in the normal direction of the detached interface, in-plane shear resistance is not considered. When investigating the folding process of a creased part, the in-plane shear resistance and its breaking limit seem to be the primary characteristics. Therefore, in this work, in order to characterize the delamination and bulging deformation, an internal breaking criteria was numerically analyzed using a new combination model. A general purpose finite element method (FEM) code was applied to develop a combination model comprising the out-of-plane fluffing subroutine and the in-plane shear glue strength. Through the FEM simulation of the folding process of creased paperboards, the following results were revealed: (1) The simulated bulging profile of the creased part and its bending moment resistance well matched with the corresponding experimental result at the stationary folding state with a folding angle >20°. (2) The in-plane shear glue strength characterizes the pattern of the interlayer delamination in the folding process of the scored zone. (3) The initial delaminated span of the scored zone is estimated as >150% of the creasing width. (4) The initial gradient of the bending moment resistance is characterized by the scored depth.Keywords : Bending, Folding, Delamination, Bulging, In-plane shear strength, FEM, Fluffing, Scored depth IntroductionCoated paperboard is widely used in the packaging industry owing to its benefits such as a high strength-to-weight ratio, high surface smoothness, printability, sustainability and recyclability. In the production of packaging containers, wedge-pushed cutting, creasing by the flatbed die cutter and the folding of creased lines are inevitable and determine the quality of containers (Kirwan, 2013). In the formation of blank patterns made of paperboard, a suitable residual stiffness of the creased parts is necessary for processing the fold of the paperboard in an automatic folder-gluer machine, and the creased lines must be stably folded without any surface failures. Namely, the creaser indentation depth against the paperboard must be controlled to retain the folding strength of the creased lines and the appropriate bulge that forms in the fold's interior. These procedures were empirically managed by experts in the past. However, to process this formation automatically in the folder-gluer machine, an appro...

show abstract

“…When the crease is folded, the topside layers of fiber on the coated side are extended and require an adequate tensile strength and stretch, while the backside layers are compressed and bulged. In order to make a smooth folding, the paperboard is usually scored by using a creaser at the pre-stage and make a localized delamination (Kirwan, 2005). It behaves like a hinge.…”

Section: Pre-processing Of Specimenmentioning

confidence: 99%

“…If this dynamic spring-back effect is unpredictable, for examples, it is difficult to effectively determine the pre-holding pattern, the compression time of adhesive application (Kirwan, 2005) and also difficult to estimate the critical bonding strength of overlapped-glued part against the opening force by the spring-back effect. This knowledge is important in a gluing and folding operation.…”

Section: Introductionmentioning

confidence: 99%

Effect of bending velocity on time-dependent release behavior of creased white-coated paperboard

Nagasawa

Ozawa

2016

Mechanical Engineering Journal

View full text Add to dashboard Cite

This work deals with time-dependent creasing characteristics of coated paperboard. The knowledge of dynamic bending moment (resistance) acting on a hinge which is folded onto a creased line, is important in order to adjust a few of boxing condition. The correlation between the dynamic bending resistance and several primary problems such as the time-dependent residual strains on actual processing phenomenon was not sufficiently discussed in the past. It is difficult to estimate various time-dependent responses from a quasi-static initial stiffness of a creased part, such as the maximum peak bending moment and the gradient of bending moment. Therefore, a prototype Crease Stress Tester (CST) has been applied to seek the dynamic bending moment and its residual deformation. In order to reveal the relaxation characteristics of bending angle during the folding and returning back motion from a tracking angle of 90°, a white-coated paperboard of 0.3 mm thickness was scored with a creaser knife and a grooved face counter plate under a specified feed velocity, and then the bending and release test was carried out up to the second round folding under a couple of indentation depth of crease forming (nominal shear strain). Through this work, the followings were found: (1) The release response of folded angle during returning back was characterized and approximated by a logarithmic function of elapsed time; (2) The release of folded angle depends on the bending rotation velocity.

show abstract

Handbook of Paper and Paperboard Packaging Technology

Cited by 56 publications

References 0 publications

The measurement of Young’s modulus of thin films using secondary laser speckle patterns

The measurement of Young’s modulus of thin films using secondary laser speckle patterns

Finite element analysis of the folding process of creased white-coated paperboard using a combined fluffing resistance and shear yield glue model

Effect of bending velocity on time-dependent release behavior of creased white-coated paperboard

Contact Info

Product

Resources

About