The Effect of Heat Input on the Compression Strength and Durability of Press-formed Paperboard Trays

Leminen, Ville; Tanninen, Panu; Matthews, Sami; Niini, Arvo

doi:10.1016/j.promfg.2020.04.108

Cited by 8 publications

(5 citation statements)

References 6 publications

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“…An elevated folding temperature dried the flange region of the trays, and the drier upper part of the tray package positively influenced the compression performance. The results were in line with similar observations by Leminen et al (2020) with respect to the positive effect of increased heat input to the compression strength of paperboard tray packages. In addition to the improved compression strength, the folding method can facilitate the stacking of the tray packages by preventing overlapping of the tray flanges between the stacked trays.…”

Section: Compression Testssupporting

confidence: 92%

“…The tensile strength of tray corners is affected by the bonding of the polymer coating at the adjacent creases in the tray geometry (Leminen et al 2020). The trays folded at 90 °C indicated improved strength and stiffness of the tray corners.…”

Section: Fig 11 Torsion Test Resultsmentioning

confidence: 99%

“…The press-forming of the trays was done with a 150 °C female mold tool temperature, a 0.96-kN blank holding force, a 150-kN pressing force, a 1 s dwell time, and an 80-mm/s pressing speed. A detailed description of the press-forming process was outlined in the previous work by Leminen et al (2020). An experimental folding device (Fig.…”

Section: Methodsmentioning

confidence: 99%

“…The stiffness and strength of the press-formed trays are important in determining their usability. Increased tool temperature in the press-forming was previously found to improve the compression strength of paperboard trays (Leminen et al 2020). Increased forming force and blank holder force were also connected to the improved rigidity of paperboard trays (Leminen et al 2018).…”

Section: Introductionmentioning

confidence: 91%

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A folding method to increase the rigidity of paperboard tray packages

Niini

Tanninen

Laukala

et al. 2022

BioRes

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The flange of press-formed paperboard trays was reshaped in this work with a developed folding method to increase the rigidity of the trays. The tray rigidity was evaluated with compression, torsion, and storing tests. The rigidity of the folded trays and the reference trays was compared, and the quality of the trays was investigated with an optical analysis. The folding temperature was altered to 23, 60, and 90 °C to compare the effects of heat input on the tray rigidity. The compression and torsion test results linked the increased tray rigidity to the additional heat input and surface pressure induced to the material in the folding phase. The trays that were folded at 90 °C showed a 43% higher compression force and a 12% smaller torsion angle compared to the reference trays. The storing tests showed an unclear effect on the tray rigidity to the dimensional stability, and the optical analysis depicted similar quality between the folded and the reference trays. The folding method was found to enhance the stacking and end use capabilities of paperboard tray packages, and the use of higher folding temperatures was suggested to increase the strength and stiffness of the trays.

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Section: Compression Testssupporting

confidence: 92%

Section: Fig 11 Torsion Test Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 91%

See 2 more Smart Citations

A folding method to increase the rigidity of paperboard tray packages

Niini

Tanninen

Laukala

et al. 2022

BioRes

Self Cite

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show abstract

“…Packages and fibre-based materials can be subjected the various stresses during their production and usage, including moisture and temperature related effects [5,6,19] and physical stresses such as compression [6,7] or abrasion [8]. The effects can damage the packaging, and in the context of smart packaging these stresses can damage the sensors and therefore effect the functionality and readability of the printed electronics.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Package Properties with Formed Functional Surface Features

Leminen

Tanninen

Pesonen

et al. 2022

KEM

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Paperboard package properties can be improved by embossing functional features on package surfaces. Embossing is used in package manufacturing as an additional tool to improve the appearance of the packages. It can also be used to increase product safety by improving functionality and identifiability of packages. Creation of features directly on the base material without implementing additional components improves the sustainability level of package applications. To evaluate functionality of features, such as protective surface patterns, in the applicable practice, the following steps need to be gone through; design phase, tool manufacturing phase, pattern production phase and analysis phase. Bespoken toolsets were designed and manufactured to form a protective frame around commercial radio-frequency identification tag (RFID). The essential process parameters in the embossing experiments were the pressing force and the plate temperature which were optimized in preliminary tests. Methods for evaluating the performance of created embossed patterns were wear testing of package surfaces, topography measurement with a 3D profilometer and SEM-imaging for more detailed analysis. The results show that embossing is a suitable manufacturing method for creating targeted functional features on paperboard surfaces. With the formed surface features, the functionality of the packages was improved by protecting the identification labels.

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Measurement of changes in torsional stiffness of press‐formed paperboard packages induced by heat load utilizing a developed measuring device

et al. 2021

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The press-forming process and the effects of parameter variation on the forming process have attracted great interest lately. The dimensional accuracy of the formed trays and the rigidity and stability of the packages are crucial factors for functionality in packaging lines, especially in fast operating machinery. The torsional stiffness of trays must be at a sufficient level to ensure the functionality in subsequent processes and logistics. The objective of this study was to develop and build a device for measuring the torsional stiffness of whole tray packages, to verify its functionality and to investigate the effect of heat load transferred to paperboard material on the torsional stiffness of the formed trays. The operation of the novel torsional stiffness tester was confirmed, and the tester was found to be suitable for measuring the thermal response of the sample materials and the effect of the fibre direction. Thus, the analysed material does not need to have a homogeneous stiffness property since the differences are noticeable in the measurement results. In addition, the results indicate that tray blanks should be die cut in the machine direction of the paperboard. The torsional stiffness of the tray packages increases, and the outer dimensions decrease as a function of the heat input. The first feature is desirable for packaging functionality and the second feature can be compensated by competent packaging design. To conclude, the use of higher mould temperatures is recommendable if the integrity of the package material is not compromised.

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The Effect of Heat Input on the Compression Strength and Durability of Press-formed Paperboard Trays

Cited by 8 publications

References 6 publications

A folding method to increase the rigidity of paperboard tray packages

A folding method to increase the rigidity of paperboard tray packages

Improvement of Package Properties with Formed Functional Surface Features

Measurement of changes in torsional stiffness of press‐formed paperboard packages induced by heat load utilizing a developed measuring device

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