Packaging Technology and Science

Cover image for Vol. 28 Issue 8

August 2015

Volume 28, Issue 8

Pages 657–759

  1. Paper Presented at 2015 IAPRI Symposium

    1. Top of page
    2. Paper Presented at 2015 IAPRI Symposium
    1. On-the-road Measurements to Establish the Dynamic Characteristics of Transport Vehicles (pages 657–671)

      Daniel Ainalis, Vincent Rouillard and Michael Sek

      Article first published online: 20 FEB 2015 | DOI: 10.1002/pts.2124

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      This paper presents the continued research into the development of an experimental technique to accurately estimate the dynamic characteristics (frequency response function) of road vehicles using only in-service response data. The single-wheeled prototype vehicle was instrumented to measure the actual longitudinal pavement elevation profile traversed by the vehicle. The measured pavement profiles were used to establish the actual (on-the-road) dynamic characteristics of the vehicle for comparison and to ascertain the spectral shape of the pavement excitation during each experimental run.

    2. Review Paper on Road Vehicle Vibration Simulation for Packaging Testing Purposes (pages 672–682)

      Julien Lepine, Vincent Rouillard and Michael Sek

      Article first published online: 1 JUN 2015 | DOI: 10.1002/pts.2129

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      This review paper identifies and critically evaluates the recent developments in transport vibration simulation for packaging testing purposes. It begins with an overview of the standardized methods followed by the more advanced developments that focus on the different random processes of vehicle vibration by simulating non-Gaussian, non-stationary, transient, and harmonic signals. As no ideal method exists yet, the review presented in this paper is a guide for further research and development on the topic.

    3. Monitoring the Condition of Non-linear Packaging Materials Subject to Varying Excitation Levels Using a Reverse Multiple Input/Single Output Based Approach (pages 683–693)

      Matthew J. Lamb and Anthony J. Parker

      Article first published online: 1 JUN 2015 | DOI: 10.1002/pts.2130

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      This paper presents the results from the use of an optimised reverse multiple input/single output algorithm for tracking variations in the condition of packaging elements subjected to excitation with varying magnitude. The results are compared with those obtained using a more traditional single input/single output based approach. Experiments are performed on expanded polystyrene cushions and corrugated paperboard containers. The reverse multiple input/single output technique provides a consistent measure of the condition of non-linear systems, which is not influenced by the excitation level.

    4. Primary Resonance Behaviour of a Nonlinear, Viscoelastic Model of Expanded Polymer Cushion Material (pages 694–709)

      By Gregory S. Batt, James M. Gibert and Mohammed Daqaq

      Article first published online: 1 JUN 2015 | DOI: 10.1002/pts.2131

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      The solution of a nonlinear and viscoelastic ordinary differential equation is analytically approximated and is demonstrated to be capable of capturing the qualitative bending behavior, amplitude, and bandwidth near primary resonance. Limitations due to the system-identification data-collection method are demonstrated to affect the ability of the model to capture the degree of the nonlinearity present at lower strain levels. The nonlinear solution is used to study the effect of varying excitation acceleration and static stress on the frequency response of expanded polymer foam.

    5. Development of Palladium-based Oxygen Scavenger: Optimization of Substrate and Palladium Layer Thickness (pages 710–718)

      Selçuk Yildirim, Bettina Röcker, Nadine Rüegg and Wolfgang Lohwasser

      Article first published online: 1 JUN 2015 | DOI: 10.1002/pts.2134

      Oxygen scavenging films based on a palladium coating were developed to remove residual oxygen remaining in food packages after modified atmosphere packaging. It was demonstrated that the oxygen scavenging activity of those films was strongly dependent on the coating substrate as well as on the palladium deposition thickness. The resulting scavenger films have the potential to scavenge residual headspace oxygen of sensitive foods within a matter of minutes leading to shelf life extension and overall quality improvements.

    6. Measurement and Analysis of Physical and Climatic Distribution Environment for Air Package Shipment (pages 719–731)

      Sher Paul Singh, Jay Singh and Koushik Saha

      Article first published online: 1 JUN 2015 | DOI: 10.1002/pts.2136

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      This study was aimed at establishing the ‘air package shipment’ conditions experienced by packages transported by air under ‘normal conditions of transport’. A ‘single profile’ or ‘test’ was developed using the time spent by the package in each of the segments of transportation to represent the average and normal expected levels for each hazard element. The recommended test methods and levels can be easily adopted by existing distribution packaging testing labs globally.

    7. A Review of Ethylene Permeability of Films (pages 732–740)

      Andrew R. East, Himani C. Samarakoon, Thamarath Pranamornkith and John E. Bronlund

      Article first published online: 1 JUN 2015 | DOI: 10.1002/pts.2137

      For fresh produce, ethylene regulates ripening and deterioration. In-package ethylene concentration is often sought to be minimized or used as a quality indicator. To predict in-package ethylene concentration, knowledge of the ethylene permeability of the film is required. This study reviews the available existing ethylene permeability data for films and found a scarcity, especially at industrially relevant conditions. Collection of more ethylene permeability data is required in order to enable prediction and control of ethylene in produce packaging systems.

    8. Flexible and Tough Poly(lactic acid) Films for Packaging Applications: Property and Processability Improvement by Effective Reactive Blending (pages 741–759)

      Wannee Chinsirikul, Jareenuch Rojsatean, Bongkot Hararak, Noppadon Kerddonfag, Ajcharaporn Aontee, Kanisorn Jaieau, Pramote Kumsang and Chao Sripethdee

      Article first published online: 13 JUN 2015 | DOI: 10.1002/pts.2141

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      Highly flexible PLA film was successfully produced by integrating effective reactive blending and economical film blowing process. Ductile PLA film having high elongation at break of ~250% and toughness of ~100 MPa was obtained by incorporating PBAT of 20 wt% via reactive blending with a small amount of chain extender (ESA) of only 1%. Films of PLA/PBAT/1%ESA exhibit potential as packaging material; their mechanical and optical properties are comparable with or even exceed some existing films used in the market.